Article
Agricultural Engineering
Hua Wang, Cheng Qiu, Shaochen Bian, Lei Zheng, Yongmin Chen, Yali Song, Chengran Fang
Summary: Wastewater treatment plants can both receive and release nanoplastics (NPs) and microplastics (MPs). Further investigation is needed to understand the effects of NPs and MPs on nitrogen removal and extracellular polymeric substances (EPS) during the activated sludge process. Results showed that polystyrene NPs (NPS) and 100 mg/L polystyrene MPs (MPS) reduced the specific nitrate reduction rate, leading to nitrate accumulation. This was mainly attributed to the negative effects on functional genes involved in denitrification.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Boji Wang, Lanlan Lu, Yao Zhang, Keyu Fang, Dong An, Hongjing Li
Summary: This study found that waste zero-valent iron can shorten the acclimation time of microorganisms in the presence of bisphenol A, improve the removal efficiency of bisphenol A, and increase the production of extracellular polymeric substances. Additionally, the microbial community structure in SBBR-ZVI+BPA was more diverse, and the abundance of bisphenol A biodegradation strains could be enhanced.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Zhang-Wei He, Wen-Zong Liu, Cong-Cong Tang, Bin Liang, Ai-Juan Zhou, Fan Chen, Yong-Xiang Ren, Ai-Jie Wang
Summary: The study revealed that BACs accelerated cell lysis and contributed to the accumulation of SCFAs in waste activated sludge. At high concentrations, BACs almost completely inhibited methane production and shifted microbial communities related to SCFAs and methane productions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Shaofeng Zhou, Zhiyang Liao, Beiping Zhang, Rui Hou, Yi Wang, Shungui Zhou, Yifeng Zhang, Zhiyong Jason Ren, Yong Yuan
Summary: The study investigated the photochemical characteristics of EPS from different microbial sources, revealing that the diversity of EPS composition led to variations in the steady-state concentrations of reactive species. Protein-like components in EPS were found to undergo degradation under light exposure, while humic-like components remained stable. The phototransformation of EPS facilitated the degradation of antibiotic tetracycline.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Lu Zhou, Jixian Yang, Fang Ma, Shanshan Pi, Aiqi Tang, Ang Li
Summary: The recovery of Pd from Pd(II) wastewater using microbial extracellular polymeric substances (EPS) and magnetic nanocomposite EPS@Fe3O4 was successful, showing excellent catalytic activity in methylene blue reduction. EPS@Fe3O4 proved to be an efficient adsorbent for Pd recovery, with high potential for practical applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Phuc-Nguon Hong, Norihisa Matsuura, Mana Noguchi, Ryoko Yamamoto-Ikemoto, Ryo Honda
Summary: This study investigated the effects of vanillin on extracellular polymeric substances (EPS) and microbial community in an MBR. The results showed that vanillin remarkably reduced membrane fouling by inhibiting the production of viscous EPS and hydrophobic lipopolysaccharides. This interference to microbial activity effectively mitigated biofouling in the MBR.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Hang Xu, Erkai He, Willie J. G. M. Peijnenburg, Lan Song, Ling Zhao, Xiaoyun Xu, Xinde Cao, Hao Qiu
Summary: This study highlights the significant role of microbial EPS as reducing agents and electron transfer mediators for cupric reduction and cuprous formation in natural environments. EPS from different microbial species showed varied electron transfer ability, with c-type cytochromes playing a major role in copper transformation for Shewanella oneidensis MR-1 EPS, while functional groups like phenolic and amide dominated Cu(II) reduction for Bacillus subtilis and Saccharomyces cerevisiae EPS.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Zhimao Mai, Xin Zeng, Xing Wei, Cuici Sun, Jianwei Niu, Wenwen Yan, Jun Du, Yingting Sun, Hao Cheng
Summary: This study found that mangrove restoration significantly enhances sediment anti-scouribility and promotes EPS content in sediments, with extracellular protein and polysaccharide positively correlated with anti-scouribility. The increased bacterial abundances in sediments after mangrove restoration, especially Kandelia obovata, suggest Proteobacteria and Bacteroides may play important roles in EPS secretion and anti-scouribility promotion. Additionally, the increase in total organic carbon, total nitrogen, and total phosphorus induced by mangrove restoration may contribute to the improvement of sediment anti-scouribility.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Na Liu, Yanbin Yun, Liming Hu, Linting Xin, Mengxia Han, Panyue Zhang
Summary: By comparing the performance of ABR-MFC and ABR, it was found that the ABR-MFC reactor has better dye removal efficiency, higher power density, higher EPS concentration, and better methane production and microbial species, indicating that embedding MFC in ABR can effectively improve the performance of the reactor.
Article
Environmental Sciences
Jing Ji, Liang Peng, M. M. Redina, Tianpeng Gao, Aman Khan, Pu Liu, Xiangkai Li
Summary: The study revealed that in the SBR processing system, PFOS is mainly removed through adsorption, significantly impacting the removal rates of COD and ammonia nitrogen, leading to a decrease in microbial richness and diversity, which in turn reduces the system's efficiency in removing COD and ammonia nitrogen.
Article
Biotechnology & Applied Microbiology
Dan Luo, Kang Zhang, Tianshun Song, Jingjing Xie
Summary: This study presents a strategy for enhancing microbial extracellular electron transfer (EET) by adding a surfactant. The addition of Tween 80 surfactant increases the secretion of extracellular polymeric substances (EPSs) by the cathode biofilm, improving its electrochemical activity. It also promotes the enrichment of the primary acetogen, Acetobacterium. As a result, the MES system with Tween 80 addition showed significantly higher acetate production rate and coulombic efficiency.
BIOCHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Pingjin Yang, Lei Li, Yingyue Zhou, Shangyi Zhang, Zhi Zhang, Yun Peng, Hengyi Liu, Wenjie Ye, Xuya Peng
Summary: This study found that extracellular polymeric substances (EPSs) have a significant influence on the foaming issue in food waste anaerobic digesters. Hydrophobic EPSs contribute to foam formation, while hydrophilic EPSs increase the contribution of hydrophobic EPSs by increasing sludge viscosity. For foam stabilization, hydrophobic proteins and humic substances (HU) are the main contributors. Hydrophobic proteins increase foam stability by reducing surface tension, while HU enhances the viscosity of the liquid film to inhibit foam breakup.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Ziyi Zhou, Wencheng Ma, Feiyu Li, Dan Zhong, Wenxuan Zhang, Luming Liu, Jingna Zhang, Yisong Zhu, Peng Su
Summary: This study evaluated the combined effects of sulfamethoxazole (SMX) and NaClO in a drinking water distribution system (DWDS) and revealed the mechanisms of antibiotic resistance gene (ARG) proliferation. Results showed that TetM gene was abundant in both the liquid phase and the biofilm, and total organic carbon (TOC) and temperature were significantly correlated with ARGs in the water phase. ARG abundance in the biofilm phase was correlated with extracellular polymeric substances (EPS). Microbial community structure influenced the proliferation and spread of ARGs in the water phase. Antibiotic concentration influenced ARGs by affecting mobile genetic elements (MGEs).
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Benedetta Pagliaccia, Emiliano Carretti, Mirko Severi, Debora Berti, Claudio Lubello, Tommaso Lotti
Summary: The recovery and conversion of Extracellular Polymeric Substances (EPS) from sewage sludge into bio-based commodities could improve the economics and environmental sustainability of wastewater treatment. The application of EPS as a biosorbent for heavy metal removal showed high adsorption capacities and diverse adsorption mechanisms, making it suitable for treating complex wastewaters.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Agricultural Engineering
Yunhui Pu, Jialing Tang, Ting Zeng, Yisong Hu, Qingyuan Wang, Jin Huang, Shengwang Pan, Xiaochang C. Wang, Yuyou Li, Huu Hao Ngo, Abdelfatah Abomohra
Summary: This study revealed the membrane fouling mechanisms during AnMBR operation for swine wastewater treatment. Results showed that high pollutant removal and energy recovery could be achieved at certain organic loading rates, but higher rates would aggravate the membrane fouling. Microbial analysis based on high-throughput sequencing confirmed the presence of fouling-causing bacteria and their enrichment in the cake layer at higher loading rates.
BIORESOURCE TECHNOLOGY
(2022)
Article
Automation & Control Systems
Yanru Zhong, Chaohao Jiang, Yuchu Qin, Guoyu Yang, Meifa Huang, Xiaonan Luo
ASSEMBLY AUTOMATION
(2020)
Article
Agricultural Engineering
Hua Li, Hai-Liang Song, Han Xu, Yi Lu, Shuai Zhang, Yu-Li Yang, Xiao-Li Yang, Yu-Xiang Lu
BIORESOURCE TECHNOLOGY
(2020)
Article
Biochemistry & Molecular Biology
Shuai Zhang, Yu-Xiang Lu, Jia-Jie Zhang, Shuai Liu, Hai-Liang Song, Xiao-Li Yang
Article
Engineering, Environmental
You Wu, Yun Cai, Yu-Xiang Lu, Li-Min Zhang, Xiao-Li Yang, Hai-Liang Song, Yu-Li Yang
WATER SCIENCE AND TECHNOLOGY
(2020)
Article
Agricultural Engineering
Hai-Liang Song, Yu-Xiang Lu, Xiao-Li Yang, Han Xu, Rajendra Prasad Singh, Kai-Xing Du, Yu-Li Yang
BIORESOURCE TECHNOLOGY
(2020)
Article
Agricultural Engineering
Yu-Li Yang, Yu-Xiang Lu, You Wu, Yun Cai, Zhen He, Xiao-Li Yang, Hai-Liang Song
Summary: The study investigated the effects of several key operating parameters on salinity accumulation in osmotic membrane bioreactors, finding that DS concentration was the primary factor influencing reverse solute flux, while aeration played a vital role in reverse-fluxed ammonium transport. Increased current generation facilitated reverse-fluxed ammonium migration, and the lack of electrolyte addition in catholyte contributed to its diffusion. These optimal parameters encourage the further development of effective strategies for salinity mitigation in BES-based OMBR technology.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Yun Cai, You Wu, Yu-Li Yang, Yu-Xiang Lu, Hai-Liang Song
Summary: The study investigated the impact of different DS concentrations on salinity accumulation, finding that NH4Cl DS performed the best, while high NaOAc DS concentration led to increased current density but decreased COD removal efficiency, with mechanisms such as electrically driven migration contributing to the transport of reverse-fluxed Na+.
Article
Engineering, Environmental
Yu-Xiang Lu, Hai-Liang Song, Hameer Chand, You Wu, Yu-Li Yang, Xiao-Li Yang
Summary: In this study, the adsorption kinetics, transformation pathways, and membrane rejection mechanisms of OMBRs were investigated by adding two typical antibiotics. The results showed that the removal efficiency of antibiotics varied depending on their molecular structures, with TC-HCl exhibiting higher adsorption capacity than SDZ. Furthermore, the biodegradation of TC-HCl produced polysaccharide-like substances that enhanced microbial metabolism, contributing to microbial function during biotransformation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
You Wu, Yu-Xiang Lu, Yun Cai, Yu-Li Yang, Xiao-Li Yang, Hai-Liang Song
Summary: This study proposed a novel configuration of an osmotic membrane bioreactor (OMBR) combined with a single-chamber air-cathode bioelectrochemical system (BES) for simultaneous enhancement of nitrogen removal and current generation. The use of a reverse-fluxed solute as a supplementary carbon source was found to promote nitrogen removal and current generation. The results showed that a longer hydraulic retention time or a higher draw solute concentration improved nitrogen removal efficiency, but also increased the competition for carbon sources. A lower draw solute concentration was more cost-saving for the system operation.
Article
Engineering, Environmental
Shuai Liu, Yu-Xiang Lu, Hui Chen, Shuai Zhang, Bin Chen, Hai-Liang Song
Summary: A biofilm electrode system was used to treat wastewater containing sulfamethoxazole, and the microbial community dynamics were investigated. The results showed that the biofilm electrode reactor had higher species richness compared to the microbial fuel cell-constructed wetland, but the Shannon index was influenced by the run time. Principal axis analysis revealed that the species composition of the microbial fuel cell-constructed wetland was more similar to the control. Additionally, the correlation analysis showed significant relationships between the biofilm electrode reactor and microbial fuel cell-constructed wetland with voltage and sulfamethoxazole concentration.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Hai-Liang Song, Chen Zhang, Yu-Xiang Lu, Hua Li, Yi Shao, Yu-Li Yang
Summary: This study investigated the effects of multiple antibiotics on the removal rate of antibiotics, microbial community composition, metabolite composition, and ARG abundance in soil microbial fuel cells (MFCs). The results showed that the addition of mixed antibiotics in the MFC led to higher antibiotic removal rates and lower risks of ARG release into soil environments. These findings support the further development of soil MFC technology for the remediation of antibiotic-polluted soils.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yu-Xiang Lu, Heyang Yuan, Yi Shao, Hameer Chand, You Wu, Yu-Li Yang, Hai-Liang Song
Summary: A comprehensive study was conducted to investigate the effects of draw concentration, pH, and solute type on the fate of tetracycline during the forward osmosis (FO) process through experimentation, factor analysis, and artificial neural network modeling. The results showed that high draw concentration facilitated tetracycline diffusion, low draw pH enhanced tetracycline rejection, and solute type influenced tetracycline retention. These findings provide practical and predictive insights for the development of efficient FO processes for pharmaceutical wastewater treatment.
Article
Engineering, Environmental
Yu-Xiang Lu, Heyang Yuan, Hameer Chand, You Wu, Yu-Li Yang, Heng Liang, Hai-Liang Song
Summary: Osmotic membrane bioreactors (OMBRs) are considered suitable for treating wastewater containing tetracycline, but the impact of membrane fouling layer on tetracycline filtration and its relationship with microbial activity is still unclear. This study investigated the effects of draw solute concentration and type on the formation of a membrane fouling layer for tetracycline filtration and found that the fouling layer played an important role in tetracycline filtration and degradation. The study provided insights into the combined effect of membrane fouling and microorganisms on tetracycline removal.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Ronghua Qin, Xiaoyun Dai, Yunchuan Xian, Yijie Zhou, Chengyuan Su, Zhengpeng Chen, Xinya Lu, Chenbing Ai, Yuxiang Lu
Summary: This study investigated the impact of sulfate on the reduction of Cr(VI) in a microbial fuel cell system. The results showed that the presence of sulfate decreased the removal rate of Cr(VI) and inhibited the electrochemical performance of the system. Additionally, sulfate affected the characteristics of the sludge and metabolic mechanisms.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Review
Agricultural Engineering
Yu-Li Yang, You Wu, Yu-Xiang Lu, Yun Cai, Zhen He, Xiao-Li Yang, Hai-Liang Song
Summary: Hybrid osmotic membrane bioreactors utilize various biological or desalination processes to recover nutrients, energy, water, and solutes from wastewater. However, lack of universal parameters and high operation costs are major challenges. Efforts are needed to optimize parameters, control costs, and accelerate real-world applications.
BIORESOURCE TECHNOLOGY
(2021)