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A decision framework for rural domestic sewage treatment models and process:Evidence from Inner Mongolia Autonomous Region,China 认领 引用 被引量：1
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作者 Ying Yan Pengyu Li +5 位作者 Zixuan Wang Yubo Tan Tianlong Zheng Jianguo Liu Xiaoxia Yang Junxin Liu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第1期302-311,共10页
Rural domestic sewage treatment is critical for environmental protection.This study defines the spatial pattern of villages from the perspective of rural sewage treatment and develops an integrated decision-making sys... Rural domestic sewage treatment is critical for environmental protection.This study defines the spatial pattern of villages from the perspective of rural sewage treatment and develops an integrated decision-making system to propose a sewage treatment mode and scheme suitable for local conditions.By considering the village spatial layout and terrain factors,a decision tree model of residential density and terrain type was constructed with accuracies of 76.47%and 96.00%,respectively.Combined with binary classification probability unit regression,an appropriate sewage treatment mode for the village was determined with 87.00%accuracy.The Analytic Hierarchy Process(AHP),combined with the Technique for Order Preference(TOPSIS)by Similarity to an Ideal Solution model,formed the basis for optimal treatment process selection under different emission standards.Verification was conducted in 542 villages across three counties of the Inner Mongolia Autonomous Region,focusing on the standard effluent effect(0.3773),low investment cost(0.3196),and high standard effluent effect(0.5115)to determine the best treatment process for the same emission standard under different needs.The annual environmental and carbon emission benefits of sewage treatment in these villages were estimated.This model matches village density,geographic feature,and social development level,and provides scientific support and a theoretical basis for rural sewage treatment decision-making. 展开更多
关键词 Rural domestic sewage Sewage treatment model Decision-making Environmental-economic benefits Inner Mongolia
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Influence of Sewage Sludge Ash and Superabsorbent Polymer on Volume Deformation of Cement Paste with Low Water/binder Ratio 认领 引用
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作者 GU Chunping YU Zhe +6 位作者 ZHANG Jiahui BAO Zhenan WEI Haixia XU Yanwen WANG Qiannan DING Cong KONG Deyu 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2026年第3期768-777,共10页
In order to facilitate the recycling of sewage sludge ash(SSA),and to reveal the effects of SSA and super absorbent polymers(SAP)on the volumetric deformation of the high performance cementbased materials,the separate... In order to facilitate the recycling of sewage sludge ash(SSA),and to reveal the effects of SSA and super absorbent polymers(SAP)on the volumetric deformation of the high performance cementbased materials,the separate and coupled effects of SSA and SAP on the volumetric deformation of the cement pastes with a low water/binder ratio(0.25)under different environmental conditions(sealed,drying,and water immersion environments)were studied.The results showed that the addition of SSA or SAP reduced the autogenous and drying shrinkage,and increased the water immersion expansion strain of the cement pastes.The addition of SSA and SAP together further reduced the autogenous and drying shrinkage,and increased the water immersion expansion.The synergistic effect of SSA and SAP on the volumetric deformation of the cement pastes was observed under a sealed environment.It was less significant under a water immersion environment.Under drying environment,the reduction in shrinkage caused by the combined addition of SSA and SAP was lower than the sum of the reduced shrinkages caused by SSA and SAP alone.These findings provided a new potential approach for the recycling and utilization of SSA. 展开更多
关键词 cement paste sewage sludge ash super absorbent polymer volumetric deformation
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Recovery of nitrogen and phosphorus in sewage sludge treatment technologies 认领 引用 被引量：1
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作者 Lu Liu Yihe Wang +2 位作者 Jialin Wang Chao He Jun Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第3期6-17,共12页
Sewage sludge(SS)is a by-product of wastewater treatment.Recovering resources from SS,particularly nitrogen(N)and phosphorus(P),is emerging as a crucial approach to promoting carbon neutrality within the treatment sec... Sewage sludge(SS)is a by-product of wastewater treatment.Recovering resources from SS,particularly nitrogen(N)and phosphorus(P),is emerging as a crucial approach to promoting carbon neutrality within the treatment sector.This need necessitates developing methods that not only recover these vital nutrients but also mitigate the release of nitrogenous pollutants.Our review addresses the recovery of N and P from SS,aiming to reduce the dissemination of harmful nitrogen compounds into the environment.We provide a comprehensive analysis of techniques ranging from ultrasonic treatment and aerobic/anaerobic digestion to thermochemical conversion methods such as incineration,pyrolysis,and gasification.We also evaluate strategies like bio-enhanced phosphorus recovery and electrochemical methods,with the dual goal of diminishing nitrogen emissions and reclaiming phosphorus from SS.The review synthesizes advanced techniques and strategies to support emission control and resource recovery,offering a comprehensive guide for advancing SS treatment technologies. 展开更多
关键词 Sewage sludge Nitrogen Phosphorus Treatment technology Resource recovery
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The dissemination of antibiotic resistance genes and heavy metal resistance genes along the sewage pipe under Cu and Zn stress 认领 引用
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作者 Xin Wu Kunyu Liu +6 位作者 Aoxi Chen Yi Lu Tianle Qi Zhi Lv Quanjie E Haodong Wei Cuiyun Liu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第6期371-381,共11页
The long-term existence of heavy metals in sewage pipe was one of the selective pressures of resistance genes.This work explored the dissemination mechanisms of antibiotic resistance genes(ARGs)and heavy metal resista... The long-term existence of heavy metals in sewage pipe was one of the selective pressures of resistance genes.This work explored the dissemination mechanisms of antibiotic resistance genes(ARGs)and heavy metal resistance genes(HMRGs)under Cu and Zn stress and their dissemination differences at different locations along the pipe.It was found that at lower Cu and Zn concentrations,microorganisms secreted more extracellular polymeric substance(EPS)for self-protection,with a 77.83%increase on the 14th day.As the concentrations increased,the relative abundance of most HMRGs increased.TnpA and intl1 showed positive correlations with major ARGs and HMRGs.Moreover,the potential hosts of efflux pump genes(copB,tetA and czcA)were resistant to Cu and Zn.It could be inferred that the co-resistance and cross-resistance induced by heavy metals promote the horizontal gene transfer.When Cu and Zn concentrations were higher,the combined stress exceeded the impact of water flow,becoming primary external environmental pressure.The differences of EPS,protein and polysaccharide contents became smaller among the front,middle and posterior of pipe.While at the front,the microorganisms were more abundant,and the relative abundance of most resistance genes were higher.Correspondingly,the relative abundance of major potential hosts(e.g.,unclassified_f_Bacteroidetes_vadinHA17,Smithella,Caldisericum)at the front sediment was significantly higher than that of the posterior(p≤0.05).The study revealed the dissemination law of genes in sewage pipe under Cu and Zn stress,and laid theoretical foundations for further research on blocking the dissemination of genes. 展开更多
关键词 Sewage pipe Cu and Zn Resistance genes Microbial community Longitudinal dissemination
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Optimization of the Biofilm-Coupled Constructed Wetland Process for Rural Domestic Sewage Treatment 认领 引用
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作者 LI Yongmei LIU Zhulin 《外文科技期刊数据库（文摘版）自然科学》 2026年第2期068-073,共6页
Rural domestic sewage is characterized by decentralized discharge, large water quality fluctuations, low pollutant concentrations, and insufficient centralized treatment facilities, which has become a key source of ru... Rural domestic sewage is characterized by decentralized discharge, large water quality fluctuations, low pollutant concentrations, and insufficient centralized treatment facilities, which has become a key source of rural non-point source pollution and restricts the improvement of rural ecological environment. Traditional single-constructed wetland (CW) processes suffer from low microbial activity, poor nitrogen and phosphorus removal efficiency, and unstable treatment effects under low temperature and low hydraulic load conditions, limiting their large-scale application in rural sewage treatment. To solve the above problems, this study constructed a biofilm-coupled constructed wetland (BF-CW) composite treatment system, optimized key process parameters, including hydraulic retention time (HRT), filler ratio, biofilm carrier dosage, and aeration intensity, and systematically investigated the pollutant removal performance and microbial community characteristics of the optimized system. The results showed that after parameter optimization, the optimal operating conditions of the BF-CW system were determined as a HRT of 12 h, a composite filler (zeolite: vermiculite: gravel = 3:2:5), a biofilm carrier dosage of 15%, and an intermittent aeration intensity of 0.6 m³/(m²·h). Under optimal conditions, the average removal efficiencies of chemical oxygen demand (COD), ammonia nitrogen (NH₄⁺-N), total nitrogen (TN) and total phosphorus (TP) in rural domestic sewage reached 89.24%, 92.17%, 78.35%, and 85.62%, respectively, which were 18.36%, 22.45%, 26.71%, and 20.18% higher than those of the traditional single constructed wetland. Microbial high-throughput sequencing analysis indicated that biofilm coupling significantly enriched the functional microorganisms related to nitrogen and phosphorus removal in the system, including Nitrosomonas, Nitrospira, Denitratisoma, and Polyphosphoribacter, improving the functional stability of the sewage treatment system. 展开更多
关键词 Rural domestic sewage Biofilm coupling Constructed wetland Process optimization Pollutant removal Microbial community
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Energy-Saving Operation Scheme for Sewage Pumping Stations in Water Supply and Drainage Systems 认领 引用
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作者 FU Chunyang 《外文科技期刊数据库（文摘版）工程技术》 2026年第9期124-128,共5页
Sewage pumping stations are a crucial component of the entire water supply and drainage system, yet energy consumption issues have become increasingly evident. This article focuses on how to make sewage pumping statio... Sewage pumping stations are a crucial component of the entire water supply and drainage system, yet energy consumption issues have become increasingly evident. This article focuses on how to make sewage pumping stations operate more energy-efficiently by conducting a detailed analysis of current energy usage, identifying the root causes of high energy consumption, and proposing practical, easy-to-implement energy-saving measures along with specific implementation plans. The paper first briefly outlines the basic operational process of sewage pumping stations, then clearly organizes the main components of energy consumption and key influencing factors, particularly highlighting existing problems such as low equipment efficiency and overly simplistic or crude control methods during operation. The article emphasizes several concrete energy-saving approaches, including selecting higher-performance pumps and electromechanical equipment, improving process design, adopting variable frequency drive (VFD) speed control technology, making more precise adjustments to the pump station's operating environment, and establishing an intelligent scheduling system capable of real-time data collection and automated decision-making. Finally, through comparative analysis of actual operational performance before and after implementing energy-saving upgrades, the effectiveness of these measures in enhancing operational reliability, reducing energy costs, and delivering long-term benefits is evaluated. After comprehensive improvements and intelligent upgrades, the energy utilization efficiency of sewage pumping stations will significantly increase, enabling them to maintain safe, stable, and economical operations while contributing positively to the green development and sustainable advancement of the overall water supply and drainage system. 展开更多
关键词 sewage pumping station energy-saving operation energy consumption analysis variable frequency speed control intelligent scheduling
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Stabilization of clay soil using alkali-activated sewage sludge 认领 引用 被引量：2
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作者 Shahram Pourakbar Atiyeh Maneshmoaveni +3 位作者 Danial Moazami Laura Moretti Amirhossein Yousefi Nuno Cristelo 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2025年第5期3213-3224,共12页
This study investigates the innovative reuse of sewage sludge with eco-friendly alkaline solutes to improve clayey soil without conventional cementitious binders.The unconfined compressive strength(UCS)was the main cr... This study investigates the innovative reuse of sewage sludge with eco-friendly alkaline solutes to improve clayey soil without conventional cementitious binders.The unconfined compressive strength(UCS)was the main criterion to assess the quality and effectiveness of the proposed solutions,as this test was performed to measure the strength of the stabilized clay by varying binders’dosages and curing times.Moreover,the direct shear test(DST)was used to investigate the Mohr-Coulomb parameters of the treated soil.Microstructure observations of the natural and treated soil were conducted using scanning electron microscope(SEM),energy-dispersive spectroscopy(EDS),and FTIR.Furthermore,toxicity characteristic leaching procedure(TCLP)tests were performed on the treated soil to investigate the leachability of metals.According to the results,using 2.5%of sewage sludge activated by NaOH and Na2SiO3increases the UCS values from 176 kPa to 1.46 MPa after 7 d and 56 d of curing,respectively.The results of the DST indicate that sewage sludge as a precursor increases cohesion and enhances frictional resistance,thereby improving the Mohr-Coulomb parameters of the stabilized soil.The SEM micrographs show that alkali-activated sewage sludge increases the integrity and reduces the cavity volumes in the stabilized soil.Moreover,TCLP tests revealed that the solubility of metals in the treated soil alkaliactivated by sewage sludge significantly decreased.This study suggests that using sewage sludge can replace cement and lime in ground improvement,improve the circular economy,and reduce the carbon footprint of construction projects. 展开更多
关键词 Soil stabilization Toxicity leaching Alkaline activation Sewage sludge Ground improvement
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Boosted interfacial charge transfer on CoO/Zn0.5Cd0.5S for simultaneous photocatalytic H2 production and sewage purification 认领 引用 被引量：2
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作者 Deqian Zeng Qingru Zeng +2 位作者 Yimin Liu Yuezhou Wei Jizhou Jiang 《Rare Metals》 SCIE EI CAS CSCD 2025年第12期10227-10242,共16页
Harnessing solar energy for simultaneous hydrogen evolution and sewage purification with organic contaminants via photocatalysis represents an effective strategy for sustainable energy conversion and environmental pro... Harnessing solar energy for simultaneous hydrogen evolution and sewage purification with organic contaminants via photocatalysis represents an effective strategy for sustainable energy conversion and environmental protection.In this work,an innovative 2D/0D CoO/Zn0.5Cd0.5S heterointerface catalyst was fabricated using a straightforward hybridization technique.The catalyst was used for photocatalytic hydrogen evolution in solutions with inorganic sacrificial agents(S2/SO32-),ultrapure water,and Rhodamine B(RhB)dye.Remarkably,the optimized 2D/0D 5%CoO/Zn0.5Cd0.5S catalyst demonstrated an exceptional hydrogen evolution rate of 2688μmol g-1h-1 under visible-light irradiation,approximately 25-fold higher than that of pure Zn0.5Cd0.5S.Furthermore,it efficiently generates hydrogen while concurrently purifying RhB.The ultrathin CoO nanosheets uniformly disperse Zn0.5Cd0.5S nanoparticles,providing numerous catalytic active sites.In situ X-ray photoelectron spectroscopy analysis elucidates photogenerated electron transfer from layered CoO to Zn and Cd in Zn0.5Cd0.5S during photocatalysis.Photoluminescent spectra,femtosecond transient absorption(fs-TA)spectroscopy,photoelectrochemical measurements,ultraviolet photoelectron spectroscopy and first-principles calculations further confirm that the intrinsic electric field at the CoO/Zn0.5Cd0.5S heterointerface enhances photogenerated electron-hole separation and mobility.The outcomes of this research offer valuable insights into developing economical photocatalysts for efficient hydrogen production and concurrent sewage purification with organic pollutants. 展开更多
关键词 Dual-functional photocatalysis Zn0.5Cd0.5S mixed crystal CoO nanosheets Photo-driven catalytic H2generation Sewage purification
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Characterization of gaseous products and activated chars from pyrolysis of sewage sludge in the presence of activating agent 认领 引用
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作者 Yuwen Zhu Jian Liu +5 位作者 Ting Li Xinrui Su Qian Dai Chang Xu Xuening Zhao Hanqiao Liu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2025年第9期260-269,共10页
Sewage sludge(SS)and SS impregnated with activating agents(ZnCl2 and KOH)were pyrolyzed in a fixed-bed reactor to produce gaseous fuel and activated char.The effects of heating rate,pyrolysis temperature and activa... Sewage sludge(SS)and SS impregnated with activating agents(ZnCl2 and KOH)were pyrolyzed in a fixed-bed reactor to produce gaseous fuel and activated char.The effects of heating rate,pyrolysis temperature and activator type on gas yields,pore structure and adsorption properties of activated char were systematically studied.The results demonstrated that increasing the pyrolysis temperature from 450℃ to 850℃ propo rtionally enhanced H2 and CO yields from the rapid pyrolysis of SS,while CH4 yield showed minimal variation between 650℃ and 850℃.ZnCl2 notably increased the CO yield,reaching71.9 ml·g-1at 850℃,but caused a marked reduction in CH4 yield under the tested conditions.Similarly,KOH promoted CO yield at 750℃ and 850℃,with minimal impact on CH4 production.Both activators facilitated higher H2 yields in the range of 450-550℃,while the maximum H2 yield(109.8 ml·g-1)was observed at 850℃ in the absence of activator.The activated char derived from ZnCl2-assisted pyrolysis exhibited well-developed micro-and mesopore structures,with specific surface areas ranging from 188.2 to 54.1 m2·g-1across pyrolysis temperatures of 450-850℃.When evaluated as adsorbents for methylene blue removal,activated char with greater specific surface area and total pore volume exhibited superior adsorption capacity.The adsorption process was well-described by the pseudo-second-order kinetic model. 展开更多
关键词 Sewage sludge Pyrolysis temperature Activating agent Pyrolysis gas Activated char
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Discussion on“Stabilization of clay soil using alkali-activated sewage sludge”[J Rock Mech Geotech Eng 17(2025)3213–3224] 认领 引用
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作者 Surender Singh Mrunal S.Bokade Devendra Narain Singh 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2025年第10期6758-6760,共3页
We read with great interest the investigations conducted by Pourakbar et al.(2024)on the“Stabilization of clay soil using alkali-activated sewage sludge.”The authors have investigated the feasibility of utilizing al... We read with great interest the investigations conducted by Pourakbar et al.(2024)on the“Stabilization of clay soil using alkali-activated sewage sludge.”The authors have investigated the feasibility of utilizing alkali-activated sewage sludge(AASS)as a binder for stabilizing the clayey soil.Sewage sludge(SS)in varying proportions of 1.5%,2%,2.5%,3.5%,and 4.5%was utilized to prepare geopolymer binders using sodium and potassium-based alkali activators.Furthermore,unconfined compressive strength(UCS)and direct shear tests were conducted to examine the strength development of clayey soil stabilized with AASS.While the study presented some intriguing results,we have identified critical concerns regarding(i)the selection of SS as a precursor for alkali activation,(ii)technical inconsistencies associated with the compaction characteristics and microstructural analysis,and(iii)the feasibility of the proposed methodology for practical applications.Through our discussion,we seek to highlight these issues and provide constructive feedback to advance the understanding of alkali activation processes and their implications for soil stabilization. 展开更多
关键词 Alkali activation Organic matter Sewage sludge Soil stabilization Discussion
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Constructed wetlands with mining pond integration and paddy field geometry:A regional sewage treatment plant case study 认领 引用
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作者 Soo Wei Woo Hui Weng Goh +4 位作者 Khee Ling Woon Nor Ariza Azizan Jiei Kobe Haji Alias bin Mohamed Chun Kiat Chang 《River》 EI CSCD 2025年第3期351-362,共12页
Discharge from sewage treatment plants can deteriorate river water quality due to improper management or insufficient levels of treatment.To address these challenges,constructed wetland systems(CWSs)have been widely u... Discharge from sewage treatment plants can deteriorate river water quality due to improper management or insufficient levels of treatment.To address these challenges,constructed wetland systems(CWSs)have been widely used as a sustainable and effective solution for wastewater management.This study provides an overview of the conceptual design for a CWS to treat the discharge from the Papan Regional Sewage Treatment Plant(RSTP).The design influent for the CWS was determined,and the proposed sizing was based on simulation results to achieve the targeted concentrations consistent with Water Quality Index(WQI)Class II.The MUSIC-X software was used in this study to simulate pollutant removal performance,hydraulic behavior,and effluent quality under various flow conditions.The model was set up using site-specific inflow parameters,targeted effluent concentrations,and wetland configuration inputs,including surface area,depth,vegetation zones,and retention times.This study introduces an innovative approach by adopting the paddy field concept as the geometrical design of a multi-cell CWS,covering a total surface area of 1,250,000m2and divided into two sections(Wetland 1 and Wetland 2),with different planting plots separated by a gabion wall.The innovation lies in reimagining abandoned mining ponds as functional wetland zones,while using a paddy field-inspired grid layout to enhance hydraulic control,pollutant removal,and land efficiency.This approach transforms degraded land into an eco-engineered,cost-effective,and scalable wastewater treatment system-a novel model for tropical developing regions. 展开更多
关键词 constructed wetland secondary treatment sewage treatment plant discharge wastewater treatment Water Quality Index
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Innovative Approaches to Pretreatment and Modification of Sewage Sludge-Derived Biochar for Resource Recovery:A Short Review 认领 引用
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作者 Vijendra Singh Tanwar Santosh Kumar Singh +1 位作者 Jitendra Kumar Sharma Ritesh Patidar 《Journal of Building Material Science》 CAS 2025年第3期206-219,共14页
The uptake of biochar from sewage sludge has developed into a critical avenue for resource reclamation whilst solving waste disposal concerns.However,despite the latter side in environmental palliative,the use of this... The uptake of biochar from sewage sludge has developed into a critical avenue for resource reclamation whilst solving waste disposal concerns.However,despite the latter side in environmental palliative,the use of this biochar for remediation,recovery of nutrients,or adsorption of pollutants is often suboptimal due to poor surface area,high percentage of ash and functional group scarcity.Sewage sludge-derived biochar(SSB)has emerged as a promising material for resource recovery,environmental remediation,and sustainable waste management.This review paper scopes out the recent developments in the field of sludge derived biochar and focuses on the advances in hydrothermal carbonization biochar and its modified forms.Pretreatment methods such as hydrothermal carbonization,enzymatic treatment,ultrasonic,and acid/base wash are looked into in order to improve the purity and the characteristics of the feedstock.Post the structural adjustments some of the molecular modification methods are implemented using KOH,ZnCl2 and H3PO4 for chemical activation,doping with Fe/Mn or Mg,and thermal and microwave processes which are aimed at increasing porosity,adsorption and catalytic activity.The review also evaluates the combination of various methods to fabricate multifunctional biochar for applications such as phosphate recycling,heavy metals and carbon absorption and utilization,as well as the application of biochar as catalysts in advanced oxidation processes. 展开更多
关键词 Geotechnical Properties Municipal Sewage Sludge Particle size Distribution Treatment Process
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Characterior of the Physical,Chemical,Organic and Biological Parameters of the Sewage Sludge from Sonfonia-conakry,Guinea 认领 引用
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作者 Ibrahima Barry Aissatou Lamarana Bah +1 位作者 Boubacar Diallo Baba diogo Diallo 《Journal of Environmental Science and Engineering(B)》 2025年第6期274-282,共9页
This study focuses on the evaluation of the ammonia(NH3)stripping and the sizing of a sludge treatment plant,based on experimental results obtained at the station Sonfonia(Conakry,Guinea),based on the Heins-Coll mo... This study focuses on the evaluation of the ammonia(NH3)stripping and the sizing of a sludge treatment plant,based on experimental results obtained at the station Sonfonia(Conakry,Guinea),based on the Heins-Coll model.The targeted physicochemical parameters are temperature,the pH and nitrogenous forms NH3/NH4+.The nitrogen stripping process is described using the Azov and Goldman mathematical model,which allows for the estimation of the concentration of stripped ammonia nitrogen(N-NH3)as a function of temperature and pH.The methodology is based on sampling the liquid fraction at different levels of the station,followed by physicochemical analyses and a comparative interpretation of the results.The average results obtained for the period 2022-2023 at the plant inlet are as follows:temperature of 29.71℃,pH of 7.74,and NH3concentration of 28.76 mg/L.These values show that the ammonia load of the incoming sludge is significantly lower than that considered in the initial design of the plant(142 mg/L).Monitoring the flow of the effluent through the four lagoons reveals a progressive decrease in concentrations,with average values of 29.66℃ and pH of 7.66.And NH3of 16.91 mg/L,reflecting a significant purification performance of the lagoon system.Nitrogen stripping tests were conducted in 2023 at Lagoon 1,based on six observation points.The application of the Azov and Goldman model yielded the following results:temperature of 32.15℃,pH of 9.62,NH4+of 37.82 mg/L,NH3of 29.83 mg/L,with an NH3/NH4+ratio of 78.78%,confirming the determining influence of pH and temperature on the effectiveness of ammonia stripping.In conclusion,the analysis of the treatment performance of the Sonfonia sludge treatment plant highlights the relevance and robustness of the Azov and Goldman model,combined with the Heins-Coll model,for understanding nitrogen stripping mechanisms.The results obtained provide a reliable scientific basis for the optimization and design of new sludge treatment plants adapted to tropical climatic conditions. 展开更多
关键词 Sewage sludge characterization flow path lagooning stripping Sonfonia
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Flow analysis of major and trace elements in residues from large-scale sewage sludge incineration 认领 引用 被引量：4
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作者 Siyuan Yu Hua Zhang +2 位作者 Fan Lü Liming Shao Pinjing He 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2021年第4期99-109,共11页
Increase of sewage sludge(SS)has led to the construction of more incineration plants,exacerbating to the production of SS incineration residues.However,few studies have considered the mass balance of elements in large... Increase of sewage sludge(SS)has led to the construction of more incineration plants,exacerbating to the production of SS incineration residues.However,few studies have considered the mass balance of elements in large-scale SS incineration plants,affecting the residues treatment and utilization.In this study,flow analysis was conducted for major and trace elements in the SS,the fly ash(sewage sludge ash,SSA)and bottom ash from two large-scale SS incineration plants.The elemental characteristics were compared with those of coal fly ash(CFA),and air pollution control residues from municipal solid waste incineration(MSWIA),as well as related criteria.The results showed that the most abundant major element in SSA was Si,ranging from 120 to 240 g/kg,followed by Al(76–348 g/kg),Ca(26–113 g/kg),Fe(35–80 g/kg),and P(26–104 g/kg),and the trace elements were mainly Zn,Ba,Cu,and Mn.Not all the major elements were derived from SS.Most trace elements in the SS incineration residues accounted for 82.4%–127%of those from SS,indicating that SS was the main source of trace elements.The partitioning of heavy metals in the SS incineration residues showed that electrostatic precipitator ash or cyclone ash with high production rates were the major pollutant sinks.The differences in some major and trace elements could be indicators to differentiate SSA from CFA and MSWIA.Compared with related land criteria,the pollutants in SSA should not be ignored during disposal and utilization. 展开更多
关键词 Sewage sludge ash Sewage sludge incineration Electrostatic precipitator ash Cyclone ash Flow analysis Mass balance
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Optimization of Water Supply and Drainage System:Coordinated Development of Pipeline Network Maintenance and Sewage Plant Expansion and Operation 认领 引用
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作者 Jianwei Deng 《Journal of Architectural Research and Development》 2025年第5期29-35,共7页
This article focuses on the optimization of water supply and drainage systems,involving theories such as hydraulic models of pipeline systems and multi-objective collaborative optimization.It introduces the system dyn... This article focuses on the optimization of water supply and drainage systems,involving theories such as hydraulic models of pipeline systems and multi-objective collaborative optimization.It introduces the system dynamics model of sewage treatment facility expansion.Elaborating on detection technology,construction of an intelligent operation and maintenance system,and factors to be considered for sewage plant expansion,it emphasizes the importance of collaborative development and verifies benefits through the PSR model. 展开更多
关键词 Water supply and drainage system Pipeline network maintenance Expansion of sewage treatment plant
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Establishing an Assessment Index System for Sewage Treatment Works in China 认领 引用 被引量：2
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作者 Zuxin Xu Jin Xu 《Engineering》 SCIE EI CAS CSCD 2023年第8期18-22,共5页
1.Introduction The urban sewage treatment system,including sewage pipe networks and sewage treatment plants,is an important infrastructure to ensure urban social and economic operation.In the past few decades,due to t... 1.Introduction The urban sewage treatment system,including sewage pipe networks and sewage treatment plants,is an important infrastructure to ensure urban social and economic operation.In the past few decades,due to the unremitting efforts of the Chinese government,the construction of China’s urban sewage treatment infrastructure has developed rapidly[1]. 展开更多
关键词 treatment Sewage sewage
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Characterization of dissolved organic matter in urban sewage using excitation emission matrix fluorescence spectroscopy and parallel factor analysis 认领 引用 被引量：48
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作者 Weidong Guo Jing Xu +3 位作者 Jiangping Wang Yingrou Wen Jianfu Zhuo Yuchao Yan 《Journal of Environmental Sciences》 SCIE EI CAS 2010年第11期1728-1734,共7页
Wastewater dissolved organic matter （DOM） from different processing stages of a sewage treatment plant in Xiamen was characterized using fluorescence and absorption spectroscopy. Parallel factor analysis modeling of... Wastewater dissolved organic matter （DOM） from different processing stages of a sewage treatment plant in Xiamen was characterized using fluorescence and absorption spectroscopy. Parallel factor analysis modeling of excitation-emission matrix spectra revealed five fluorescent components occurring in sewage DOM： one protein-like （C1）, three humic-like （C2, C4 and C5） and one xenobiotic-like （C3） components. During the aerated grit chamber and primary sedimentation tank stage, there was only a slight decrease in fluorescence intensity and the absorption coefficient at 350 nm （a 350 ）. During the second aeration stage, high concentration of protein-like and short-wavelength-excited humic-like components were significantly degraded accompanied by significant loss of DOC （80%） and a 350 （30%）, indicating that C1 and C2 were the dominant constituents of sewage DOM. As a result, long-wavelength- excited C4 and C5 became the dominant humic-like components and the DOM molecular size inferred from the variation of spectral slope S （300–650 nm） and specific absorption （a 280 /DOC） increased. Combination use of F max of C1 and the ratio of C1/C5, or a 350 may provide a quantitative indication for the relative amount of raw or treated sewage in aquatic environment. 展开更多
关键词 dissolved organic matter sewage fluorescence EEM parallel factor analysis
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Effect of manganese oxide-modified biochar addition on methane production and heavy metal speciation during the anaerobic digestion of sewage sludge 认领 引用 被引量：29
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作者 Jianhua Li Min Zhang +1 位作者 Zhiyin Ye Changming Yang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2019年第2期267-277,共11页
Low organic matter content and high heavy metal levels severely inhibit the anaerobic digestion(AD) of sewage sludge. In this study, the effect of added manganese oxidemodified biochar composite(MBC) on methane produc... Low organic matter content and high heavy metal levels severely inhibit the anaerobic digestion(AD) of sewage sludge. In this study, the effect of added manganese oxidemodified biochar composite(MBC) on methane production and heavy metal fractionation during sewage sludge AD was examined. The MBC could increase the buffering capacity,enhance the methane production and degradation of intermediate acids, buffer the pH of the culture, and stabilize the sewage sludge AD process. The application of MBC positively impacted methane production and the cumulative methane yield increased up to 121.97%,as compared with the control. The MBC addition can improve metal stabilization in the digestate. An optimum MBC dose of 2.36 g was recommended, which would produce up to 121.1 L/kg volatile solids of methane. After the AD process, even though most of the metals accumulated in the residual solids, they could be transformation from the bio-available fractions to a more stable fraction. The total organic-and sulfide-bound and residual fraction content at a 3 g dose of MBC that is 0.12 g/g dry matter were 51.06% and 35.11% higher than the control, respectively. The results indicated that the application of MBC could improve the performance of AD and promote stabilization of heavy metals in sewage sludge post the AD process. 展开更多
关键词 Sewage sludge Anaerobic digestion Manganese oxide-modified biochar (MBC) Methane production Heavy metals Chemical species
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Distribution and elimination of polycyclic musks in three sewage treatment plants of Beijing, China 认领 引用 被引量：20
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作者 ZHOU Haidong HUANG Xia +2 位作者 GAO Mijun WANG Xiaolin WEN Xianghua 《Journal of Environmental Sciences》 SCIE EI CAS 2009年第5期561-567,共7页
The two representative polycyclic musks, 1-（5,6,7,8-tetrahydro-3,5,5,6,8,8-hexamethyl-2-naphthenyl）-ethanone （AHTN） and 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta[g]-2-benzopyrane （HHCB）, were measur... The two representative polycyclic musks, 1-（5,6,7,8-tetrahydro-3,5,5,6,8,8-hexamethyl-2-naphthenyl）-ethanone （AHTN） and 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta[g]-2-benzopyrane （HHCB）, were measured in aqueous samples and sludge samples of three sewage treatment plants （STPs） in Beijing, China using a gas chromatograph-mass spectrometry. The HHCB and AHTN concentration ranges in the influents were 1251.4-3003.8 ng/L and 111.9-286.3 ng/L, respectively. Meanwhile, the ranges of 492.8-1285.3 ng/L for HHCB and 47.3-89.3 ng/L for AHTN were present in the effluents. The musks in the sludges were three to four orders of magnitude higher than those in aqueous sewages. The removal efficiencies.of the two musks varied in the ranges of 41.7%- 70.1% for HHCB, and 25.5%-68.8% for AHTN. Adsorption onto suspended particulate matter played an important role in removing musks from the sewages. The HHCB/AHTN ratio along the treatment processes showed that the two musks had high similarity of removal from sewage by each reactor in STP. The musks in the effluent sewages may pose a low potential risk to aquatic environment in terms of the predicted-non-effect concentration. Nevertheless, considering the possible additive and synergistic effects with other compounds emitted via STPs, their bioconcentration and bioaccumulation in aquatic organisms and so on, it is essential to monitor these compounds in various compartments and to study their environmental fate. 展开更多
关键词 polycyclic musks sewage sludge removal efficiency galaxolide tonalide
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Recovery of phosphorus as struvite from sewage sludge ash 认领 引用 被引量：24
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作者 Huacheng Xu Pinjing He +2 位作者 Weimei Gu Guanzhao Wang Liming Shao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2012年第8期1533-1538,共6页
Phosphorus （P） is an element vital for all living organisms, yet the world＇s reserves of phosphate rock are becoming depleted. This study investigated an effective P recovery method from sludge ash via struvite pre... Phosphorus （P） is an element vital for all living organisms, yet the world＇s reserves of phosphate rock are becoming depleted. This study investigated an effective P recovery method from sludge ash via struvite precipitation. Results showed that more than 95% of the total P content was extracted from sludge ash by applying 0.5 mol/L HC1 at a liquid/solid ratio of 50 mL/g. Although heavy metal leaching also occurred during P extraction, cation exchange resin efticiently removed the heavy metals from the P-rich solution. Orthogonal tests showed that the optimal parameters for P precipitation as struvite would be a Mg：N：P molar ratio of 1.6：1.6：1 at pH 10.0. X-ray diffraction analysis validated the formation of struvite. Further investigations revealed that the harvested precipitate had a high struvite content （97%）, high P bioavailability （94%）, and low heavy metal content, which could be considered a high quality fertilizer. 展开更多
关键词 phosphorus recovery heavy metal sewage sludge ash struvite X-ray diffraction
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