Article
Environmental Sciences
Taixing Han, Jingjing Zheng, Yutong Han, Xiangyang Xu, Mengyan Li, Cory Schwarz, Liang Zhu
Summary: This study investigated the impact of different types of wastewater on the microbial communities in activated sludge, showing that textile-dyeing wastewater reduces the richness and diversity of microbial communities, selectively enriches microbial taxa with aromatic degradation and denitrification potentials, and inhibits the majority of metabolic functions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Jingsi Gao, Nan Yang, Hehuan Liao, Hao Yuan, Jia Zhu
Summary: This study investigated the microbial community dynamics of a full-scale activated sludge process treating optoelectronic wastewater using NGS technology. It was found that during the low-performance period, bacteria genera resistant to ionizing radiation and those capable of degrading aromatic compounds had lower diversity and abundance. The high-performance period showed shorter average path length and network diameter in microbial taxon co-occurrence network analysis, indicating efficient information dissemination among taxa.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Jennifer Ekholm, Frank Persson, Mark de Blois, Oskar Modin, Mario Pronk, Mark C. M. van Loosdrecht, Carolina Suarez, David J. I. Gustavsson, Britt-Marie Wilen
Summary: This study assessed the implementation of AGS process in Nordic countries and found rapid changes in microbial community composition during start-up and factors affecting granulation. The results showed that immigration from influent wastewater had a minor impact on microbial community after granules formation, while seasonal environmental factors were identified as important for AGS performance.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Saurabh Samuchiwal, Deepak Gola, Anushree Malik
Summary: A novel microbial consortium enriched from textile effluent was used to optimize the decolourization process, achieving significant reduction in color in dyeing unit wastewater under extreme conditions with minimum inputs. The process showed unhindered performance at higher temperatures and wide pH range, making it highly suitable for treating warm and extremely alkaline textile effluents.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Agricultural Engineering
Fangzhai Zhang, Yongzhen Peng, Zhong Wang, Hao Jiang, Shang Ren, Jingang Qiu
Summary: A novel process combining partial nitrification, fermentation, and Anammox-partial denitrification was proposed for co-treating ammonia-rich sludge supernatant, external WAS, and WWTP secondary effluent, achieving excellent nitrogen removal efficiency and external sludge reduction. This process showed significant collaboration between Anammox bacteria and partial denitrifying bacteria in the AD-UASB reactor, contributing to up to 84.1% of nitrogen removal, while saving organic resource demand and aeration consumption compared to traditional nitrification-denitrification processes.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Meng Lu, Zhi-Hua Li, Yang Jiang
Summary: Effluent temporal characteristics of wastewater treatment plants in the same province of China were analyzed to understand the performance of the plants. Ammonia and COD showed significant periodic cycles with quasi-biweekly variation, which can help identify outliers and tune the plants for better operation. This study highlights the importance of considering the collective behaviors of a plant community for evaluating WWTPs, especially when online data are readily available.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Ahmed Malik, Maham Hussain, Fahim Uddin, Waseem Raza, Sadiq Hussain, Um-e- Habiba, Tayyaba Malik, Zeeshan Ajmal
Summary: This study investigated the performance of an aerobic granular sludge (AGS) for treating real textile wastewater by evaluating the effect of different mixed liquid suspended solids (MLSS) concentrations on COD, TSS, and oil/grease removal. Results showed that an increase in MLSS concentration led to improved removal of organic material, with COD removal efficiency increasing from 91.2% to 94.5%. The study demonstrated that AGS system can efficiently treat complex and highly polluted textile wastewater by increasing the concentration of microorganisms in the reactor, resulting in higher removal rates for TSS and oil/grease.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Engineering, Environmental
Claudia V. Montoya-Bautista, Badr A. Mohamed, Loretta Y. Li
Summary: This study investigated the use of sludge-based activated carbon (SBAC) sorbent for the removal of contaminants from wastewater. The results showed that SBAC sorbents were effective in removing pollutants from pharmaceutical and personal care products, including commonly used components during the COVID-19 pandemic. This study suggests that sludge-based activated carbon has the potential to be a sustainable waste-to-resources approach for wastewater treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Badr A. Mohamed, Hanna Hamid, Claudia V. Montoya-Bautista, Loretta Y. Li
Summary: This study investigates the occurrence and removal of CECs including PAHs, PBDEs, and PFASs in the effluent of a Canadian wastewater treatment plant. Activated carbon samples synthesized from sludge were used for the removal of these contaminants, and the results showed high removal rates for PAHs, PBDEs, and some PFASs. The findings suggest that producing efficient adsorbents from sewage sludge is a sustainable solution for improving the quality of wastewater effluents.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Sobhan Ghanbari, Ali Fatehizadeh, Mehdi Khiadani, Ensiyeh Taheri, Hafiz M. N. Iqbal
Summary: This study investigated the efficiency and feasibility of ultraviolet-assisted photolysis for treating textile wastewater containing synthetic dyes. The results showed that the UV/chlorine/bromine process had a high dye removal efficiency, and the use of magnetized activated carbon further adsorbed residual dyes. In addition, the toxicity of treated wastewater was significantly reduced, indicating the potential of this process for detoxifying textile wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biotechnology & Applied Microbiology
N. Nirmalakhandan, X. Cheng, S. P. Munasinghe-Arachchige, H. M. K. Delanka-Pedige, Y. Zhang
Summary: This study demonstrates the inactivation performance of the A-WWT system in comparison to high-rate algal ponds, activated sludge, and membrane bioreactors, showing that the A-WWT system achieves a greater log reduction per unit energy input/volume of wastewater. Additionally, the concentrations of nitrogenous DBPs in the algal effluent were found to be below 50 ng/L.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Engineering, Environmental
Marie Riisgaard-Jensen, Giulia Dottorini, Marta Nierychlo, Per Halkjaer Nielsen
Summary: The immigration of bacteria in influent wastewater has a strong impact on the microbial community of activated sludge in wastewater treatment plants. The use of primary settlers can selectively increase or reduce the abundance of certain bacteria. The process of primary settling changes the microbial community of influent wastewater and can be a candidate for upstream control to optimize the assembly of microbial communities in activated sludge.
Article
Engineering, Environmental
Mohammadreza Kamali, Tejraj M. Aminabhavi, Luis A. C. Tarelho, Rens Hellemans, Joren Cuypers, Isabel Capela, Maria Elisabete V. Costa, Raf Dewil, Lise Appels
Summary: The study showed that acclimatization of activated sludge with pinewood biochar significantly enhanced the biodegradation rate of phenol. The presence of biochar led to increased specific biodegradation rates and improved microbial colonization and growth, demonstrating the positive effects of biochar in the treatment of synthetic effluents.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Shantkriti Srinivasan, Senthil Kumar Sadasivam
Summary: Both non-adapted and adapted bacteria can efficiently biodegrade azo dyes under optimized physicochemical conditions, suggesting their potential use in effluent treatment.
ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Environmental
Shen Hu, Hongying Yang, Kejian Diao, Linlin Tong, Zhenan Jin, Dayuan Peng, Huiqun Niu
Summary: This research investigates the column biooxidation treatment of organic wastewater containing acrylonitrile and enriches microorganisms from activated sludge for this purpose. The results show that under specific conditions, the microbial consortium is capable of degrading acrylonitrile with an average removal rate of 86.95%. The evolution of the microbial community reveals Sulfurovum as the dominant species, which utilizes a two-step pathway for acrylonitrile degradation.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)