Review
Green & Sustainable Science & Technology
Xiao-Long Sun, Yuan Wang, Hao-Qin Xiong, Shao-Ting Wang, Yi-Chuan Fang, Hong Xiang
Summary: Environmental estrogens (EEs) have harmful effects and a long latency period, and microalgae have been used for their removal due to their high efficiency, recyclability, and low ecological side effects. The removal efficiency of EEs by microalgae in laboratory studies was above 80% and the degradation period was about one week, showing good performance. This study proposes a model for EEs removal by microalgae and highlights the importance of considering the effect of bacteria in the removal process.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Environmental Sciences
Lin Bai, Xiaowan Dong, Fangshu Wang, Xiaohan Ding, Zhikai Diao, Dong Chen
Summary: This paper reviews the occurrence, fate, and removal efficacy of six widely appearing PAEs in conventional wastewater treatment, finding that the removal of PAEs appears to be compound- and process-dependent.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Environmental Sciences
Hussein E. Al-Hazmi, Gamal K. Hassan, Mojtaba Maktabifard, Dominika Grubba, Joanna Majtacz, Jacek M. Akinia
Summary: This review comprehensively presents and discusses the latest advances in nitrogen removal technologies from wastewaters, including traditional nitrification-denitrification and anammox-based systems. It focuses on the understanding of microbial community characteristics and optimization of operation parameters in anammox-based systems. The sustainability of BNR processes in wastewater treatment is evaluated using important indicators such as GWP, CF, and energy behaviors. The challenges and solutions for BNR processes are extensively discussed.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Monika Dubey, Bhanu Prakash Vellanki, Absar Ahmad Kazmi
Summary: This study investigates the presence of 20 emerging contaminants (ECs) in wastewater treatment plants (WWTPs) in north India, and found that all 20 ECs were identified in the influent and effluent, and 13 were identified in the final sludge. The removal of ECs in the WWTPs was mainly attributed to biodegradation/biotransformation. The risk assessment showed potential risks to algae, daphnia, and fish from certain ECs.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Adamo Riccardo Petosa, Monica Nowierski, Viviane Yargeau
Summary: Bioanalytical tools, such as in vitro bioassays, can be used in conjunction with chemical analyses to assess the efficacy of wastewater treatment and potential adverse effects on receiving waters. This study found that while some steroid hormones and indicator compounds were detected in influent samples, their concentrations decreased during treatment, with some compounds persisting in the effluent. The use of bioassays provided additional information on treatment performance, even when target contaminants were not detected, demonstrating the advantages of combining chemical analyses and bioassays for monitoring wastewater treatment efficiency and predicting potential impacts of wastewater discharges.
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2022)
Article
Environmental Sciences
Monika Dubey, Bhanu Prakash Vellanki, Absar Ahmad Kazmi
Summary: This study investigates the fate of 20 emerging contaminants in ten municipal wastewater treatment plants. Both conventional and biological nutrient removal technologies are effective in degrading these pollutants. However, the removal of antibiotics is limited and further improvement is needed.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Dhruba Jyoti Sarkar, Soma Das Sarkar, Basanta Kumar Das, Bigan Kumar Sahoo, Akankshya Das, Subir Kumar Nag, Ranjan Kumar Manna, Bijay Kumar Behera, Srikanta Samanta
Summary: This study investigated a freshwater wetland system in Eastern India and found a high concentration of microplastics and toxic metals in treatment ponds and associated wastewater canals. The presence of microplastics poses a risk to aquatic biota, with potential contamination of fish. The removal efficiency of microplastics in the treatment ponds was estimated to be 53%.
Review
Environmental Sciences
Ana B. Rios-Miguel, Tamara J. H. M. van Bergen, Caterina Zillien, Ad M. J. Ragas, Rosalie van Zelm, Mike S. M. Jetten, A. Jan Hendriks, Cornelia U. Welte
Summary: Organic micropollutants (OMPs), including pharmaceuticals and pesticides, can persist in water at low concentrations and pose a threat to aquatic ecosystems and drinking water quality. The effectiveness of wastewater treatment plants (WWTPs) in removing OMPs varies due to factors such as low concentrations, stable chemical structures, and suboptimal conditions. This review discusses these factors, focusing on the adaptation of microorganisms to degrade OMPs. Recommendations are made to improve prediction models and optimize microbial treatment strategies for OMP removal.
Article
Engineering, Chemical
Ayse Yuksekdag, Sevde Korkut, Recep Kaya, Mehmet Emin Pasaoglu, Turker Turken, Meltem Agtas, Mustafa Evren Ersahin, Hale Ozgun, Ismail Koyuncu
Summary: Natural organic matter (NOM) in water can cause taste, odor, and color problems, as well as promote microbial growth and the formation of disinfection by-products (DBPs). To enhance NOM removal and comply with DBP regulations, advanced treatment methods using tight nanofiltration (T-NF) and loose nanofiltration (L-NF) membranes were tested. The study found that both membranes achieved high TOC removal efficiency, with T-NF having better removal efficiency for heavy metals, anions, and cations.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Veterinary Sciences
Feng Huang, Yanting Hong, Chunhao Mo, Peier Huang, Xindi Liao, Yiwen Yang
Summary: This article reviews the current situation and hazards of antibiotic resistance genes (ARGs) in livestock wastewater and summarizes the influencing factors and mechanisms of different wastewater treatment processes on ARGs. It also discusses the current problems associated with removal of ARGs and proposes future research directions.
FRONTIERS IN VETERINARY SCIENCE
(2022)
Article
Engineering, Environmental
Rongwei Zhong, Hu Li, Yangyang Wang, Ying Zhang, Jian Zhou, Tiecheng Wang
Summary: Plasma oxidation was used to remove antibiotic resistance genes (ARGs) and inhibit pathogenic bacteria in municipal wastewater treatment plants (MWTP). The experimental results showed that plasma treatment effectively removed various ARGs and decreased the diversity and richness of microbial communities. Plasma treatment also resulted in reduced gene expression related to ARGs and inhibited the transmission risks of ARGs and pathogenicity in MWTP effluent.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Yuping Han, Huanhuan Xu, Guangzhou Wang, Peiyuan Deng, Lili Feng, Yaoshen Fan, Jiaxin Zhang
Summary: This study summarized the preparation, characterization, and application of biochar and nZVI-biochar composite for estrogens removal. The experiment results showed that nZVI-biochar exhibited superior removal performance for estrogens pollutants compared to biochar. The adsorption kinetics of estrogens on nZVI-biochar followed the quasi-second-order model, and the adsorption isotherm could be well represented by the Freundlich model.
Article
Engineering, Environmental
Lubertus Bijlsma, Elena Pitarch, Eddie Fonseca, Maria Ibanez, Ana Maria Botero, Javier Claros, Laura Pastor, Felix Hernandez
Summary: The study investigated the occurrence and behavior of pharmaceuticals in a wastewater treatment plant receiving wastewater from an urban area and a nearby hospital. The findings showed significantly higher concentrations of pharmaceuticals in hospital discharge samples, with antibiotics having the highest concentrations during winter.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Cheng-Shiuan Lee, Caitlin Asato, Mian Wang, Xinwei Mao, Christopher J. Gobler, Arjun K. Venkatesan
Summary: The study found that 1,4-dioxane mainly originated from household products, and NRBs were effective in removing both 1,4-dioxane and total nitrogen.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Katekanya Tadsuwan, Sandhya Babel
Summary: This study evaluates the abundance and removal efficiency of microplastics in a conventional wastewater treatment plant, finding an overall removal efficiency of 86.14%. Additionally, the use of a pilot-scale ultrafiltration system increases the removal efficiency to 96.97%.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
