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Efficient chlorination reaction of Pt/RuO2/g-C3N4under visible light irradiation for simultaneous removal of ammonia and bacteria from mariculture wastewater 认领 引用 被引量：2
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作者 Yizhan Zhang Min Zhao +2 位作者 Yida Huang Yan-Ling Hu Lei Wang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2025年第4期490-502,共13页
The removal of ammonia nitrogen(NH4+-N)and bacteria from aquaculture wastewater holds paramount ecological and production significance.In this study,Pt/RuO2/g-C3N4photocatalysts were prepared by deposit... The removal of ammonia nitrogen(NH4+-N)and bacteria from aquaculture wastewater holds paramount ecological and production significance.In this study,Pt/RuO2/g-C3N4photocatalysts were prepared by depositing Pt and RuO2particles onto g-C3N4.The physicochemical properties of photocatalysts were explored by X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM),X-ray diffraction(XRD),and UV–vis diffuse reflectance spectrometer(UV–vis DRS).The photocatalysts were then applied to the removal of both NH4+-N and bacteria from simulated mariculture wastewater.The results clarified that the removals of both NH4+-N and bacteria were in the sequence of g-C3N4<RuO2/g-C3N4<Pt/g-C3N4<Pt/RuO2/g-C3N4.This magnificent photocatalytic ability of Pt/RuO2/g-C3N4can be interpreted by the transfer of holes from g-C3N4to RuO2to facilitate the in situ generation of HClO from Cl−in wastewater,while Pt extracts photogenerated electrons for H2formation to enhance the reaction.The removal of NH4+-N and disinfection effect were more pronounced in simulated seawater than in purewater.The removal efficiency ofNH4+-N increases with an increase in pH of wastewater,while the bactericidal effect was more significant under a lower pH in a pH range of 6–9.In actual seawater aquaculture wastewater,Pt/RuO2/g-C3N4still exhibits effective removal efficiency of NH4+-N and bactericidal performance under sunlight.This study provides an alternative avenue for removement of NH4+-N and bacteria from saline waters under sunlight. 展开更多
关键词 Photocatalysis Mariculture wastewater Ammonia nitrogen Visible light irradiation Microbial inactivation
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Application of algal-mycelial pellets in the treatment of the mariculture wastewater 认领 引用
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作者 Shanshan Chen Sujie Li +5 位作者 Xunan Yang Yaobin Lu Lijuan Luo Jie Xu Kin-Chuang Ho Tiangang Luan 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2025年第8期128-137,共10页
Hypersaline mariculture wastewater necessitates treatment prior to its discharge into marine environments.Algal-mycelial pellets(AMPs),known for their cost-effectiveness,energy efficiency and sustainability,have not b... Hypersaline mariculture wastewater necessitates treatment prior to its discharge into marine environments.Algal-mycelial pellets(AMPs),known for their cost-effectiveness,energy efficiency and sustainability,have not been previously explored for their flocculation and pollutant removal capabilities in hyperhaline conditions.This work employed an orthogonal test design to investigate the effects of nine factors at three levels on the treatment efficiency of mariculture wastewater using Chlorella sp.TNBR1 and Aspergillus niger AMPs.The comprehensive optimal conditions for achieving the highest flocculation efficiency and pollutant removal are determined to be a temperature of 30℃,light intensity of 6000 lux,a 12:0 light-dark cycle,an initial pH of 6,amicroalgal density of 11.25×106cell/mL,microalgal growth phase at the early logarithmic stage,a fungal spore density of 9.00×105spore/mL and a fungal pellet phase of 60 h.Under such conditions,the treatment of nonsterile actual mariculture wastewater with Chlorella sp.TNBR1 and Aspergillus niger AMPs results in a 93.35%±7.20%reduction in chemical oxygen demand(COD),92.83%±7.29%reduction in total nitrogen(TN),100%removal of total phosphorus(TP),and a flocculation efficiency of 69.21%±5.36%.These findings confirm that AMPs are a viable solution for effectively treating COD,TN and TP in real hypersaline mariculture wastewater,while also facilitating the flocculation and harvesting of microalgae. 展开更多
关键词 Algal-mycelial pellet Mariculture wastewater Optimal condition Pollutant removal Flocculation efficiency
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Effect of C/N Ratio on Nitrogen Removal of A/O-MBBR Process for Treating Mariculture Wastewater 认领 引用 被引量：3
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作者 CHEN Xi XIANG Zhuangzhuang +3 位作者 HUANG Xiao RONG Huimin BAI Jie ZHAO Yangguo 《Journal of Ocean University of China》 SCIE CAS CSCD 2021年第4期879-885,共7页
In order to explore the effect of carbon and nitrogen(C/N)ratio on the performance of anoxic/aerobic-moving bed bio-film reactor(A/O-MBBR)process for treating mariculture wastewater,a laboratory-scale A/O-MBBR was con... In order to explore the effect of carbon and nitrogen(C/N)ratio on the performance of anoxic/aerobic-moving bed bio-film reactor(A/O-MBBR)process for treating mariculture wastewater,a laboratory-scale A/O-MBBR was conducted.The results showed that the reduction of C/N ratio was conducive to improving the removal efficiency of chemical oxygen demand(COD)and ammonia nitrogen(NH4+-N),while inhibiting that of nitrite nitrogen(NO2−-N)and nitrate nitrogen(NO3−-N).The extracellular polymeric substances(EPS)in anoxic zone were significantly higher in concentration than that in aerobic zone although they both declined with decrease of C/N ratio.The result provides solid support for better controlling the pollution of mariculture wastewater. 展开更多
关键词 mariculture wastewater C/N ratio A/O-MBBR process EPS
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Salt-tolerant Microbiota Enhancing Contaminants Removal from Mariculture Wastewater Containing Sulfamethoxazole in an A/O-MBBR 认领 引用 被引量：2
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作者 ZHENG Bingbing PANG Wenhui +4 位作者 ZHAO Yangguo GUO Liang GAO Mengchun JIN Chunji SHE Zonglian 《Journal of Ocean University of China》 SCIE CAS CSCD 2020年第4期865-873,共9页
The wide application of antibiotics in aquaculture requires an efficient treatment of the wastewater before discharging it into the environment.During the wastewater treatment,the influence of antibiotics on the perfo... The wide application of antibiotics in aquaculture requires an efficient treatment of the wastewater before discharging it into the environment.During the wastewater treatment,the influence of antibiotics on the performance of bioreactor should be well revealed due to their toxicity to the functional microbial community.In this study,the effect of feeding 10-30 mg L−1 sulfamethoxazole(SMX)in influent on the performance of an anoxic/oxic-moving bed biofilm reactor(A/O-MBBR)treating mariculture wastewater and the responding change of biofilm microbial communities was investigated.The COD average removal rate remained at 94.61%-97.34%with the dosage of SMX.Compared with that,the nitrifying removals of NH4+-N and NO2−-N were violently inhibited by 30 mg L−1 SMX and denitrifying removal of the NO3−-N decreased obviously with 20 mg L−1 or more SMX.The microbial community in the successful startup bioreactor was relatively abundant,while the diversity of microbial community decreased with the increase of feeding SMX.The salt-tolerant and SMX-resistant genera Arcobacter,Thiothrix,Desulfuromusa and Nitrosomonas were gradually enriched and finally played a vital role in converting COD and recycling nitrogen and sulfur.Hence,the present A/O-MBBR reactor with the salt-tolerant functional microbiota achieved efficient removal of pollutants in the presence of low concentration(e.g.,10 mg L−1)SMX. 展开更多
关键词 sulfamethoxazole mariculture wastewater inorganic nitrogen microbial community A/O-MBBR
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Performance Evaluation and Microbial Shift of Sequencing Batch Biofilm Reactor Treating Synthetic Mariculture Wastewater Under Different Dissolved Oxygen at Aerobic Phase 认领 引用 被引量：1
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作者 HUO Siyue LIU Wenjie +9 位作者 ZHAO Changkun LU Shuailing WANGQianzhi SHE Zonglian ZHAO Yangguo ZHANG Zhiming GUO liang JI Junyuan JIN Chunji GAO Mengchun 《Journal of Ocean University of China》 SCIE CAS CSCD 2023年第6期1692-1701,共10页
The impact of dissolved oxygen(DO)at aerobic phase on the nitrogen removal,extracellular polymeric substances(EPS),microbial activity and microbial community of sequencing batch biofilm reactor(SBBR)have been evaluate... The impact of dissolved oxygen(DO)at aerobic phase on the nitrogen removal,extracellular polymeric substances(EPS),microbial activity and microbial community of sequencing batch biofilm reactor(SBBR)have been evaluated in treating mariculture wastewater.The oxygen uptake rate and nitrification rate declined with DO concentration from 3–4 to 1–1.5mgL-1,whereas the denitrification rate had an increment.The activities of nitrifying enzymes reduced with the decrease of DO concentration at aerobic phase,but those of denitrifying enzymes illustrated opposite results.The nitrification and denitrification rates displayed the similar variation tendency with the relevant enzymatic activities as DO concentration decreased.The protein(PN)and polysaccharide(PS)content in EPS decreased as DO concentration declined,whereas the PN/PS ratio increased.The microbial community showed obvious difference as DO concentration decreased from 3–4 to 1–1.5mgL-1.The microbial co-occurrence,keystone taxa and sig-nificant difference illustrated some variations at different DO concentrations. 展开更多
关键词 SBBR mariculture wastewater DO concentration microbial activity microbial community
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