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
Environmental Sciences
Linlin Cao, Yongde Liao, Chengyuan Su, Linqin Tang, Zhifei Qi, Lixin Wei, Jinyan Wu, Shu Gao
Summary: The study found that perfluorooctanoic acid has a negative impact on the COD removal of anaerobic granular sludge, but this effect gradually weakens with microbial adaptation. PFOA also inhibits protein content in EPS and INT activity of anaerobic granular sludge, while reducing the relative abundance of certain bacteria.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(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
Environmental Sciences
Duanyi Huang, Rui Xu, Xiaoxu Sun, Yongbin Li, Enzong Xiao, Zhimin Xu, Qi Wang, Pin Gao, Zhaohui Yang, Hanzhi Lin, Weimin Sun
Summary: This study investigates the effects of Perfluorooctanoic acid (PFOA) on the microbial communities of activated sludge in wastewater treatment plants. The results show that continued exposure to PFOA leads to a decrease in microbial richness and substantial shifts in bacterial diversity and composition under both aerobic and anaerobic conditions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Zhao Tan, Yiwei Liu, Hongyu Liu, Chunping Yang, Qiuya Niu, Jay J. Cheng
Summary: HMF deteriorates the removal performance of activated sludge, reducing the removal rates of COD, TP and NH4+-N, while increasing EPS content and affecting the settleability and dewatering capacity of activated sludge. HMF also inhibits dehydrogenase activity in activated sludge and alters microbial functions. Microbial community analysis shows that some microbes are adversely affected by HMF while others better tolerate it.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Microbiology
Xiaonan Liu, Yong Nie, Xiao-Lei Wu
Summary: In this study, artificial neural networks were used to predict the microbial compositions of activated sludge systems in wastewater treatment plants worldwide, achieving a prediction accuracy of 60.42%. The predictability of the microbial community was found to be significantly correlated with relative abundance and occurrence frequency, but negatively correlated with potential migration rate. The study also successfully predicted the major functional groups in the activated sludge systems using the neural network models. The prediction of microbial community in activated sludge systems provides insights for improving operating parameters and controlling community structure.
Article
Agricultural Engineering
Chuanfu Zhao, Dong Wei, Dawei Fan, Shuangyu Meng, Shuyi Bian, Xinwen Zhang, Bin Du, Qin Wei
Summary: In this study, a novel electrochemical system coupling nitrifying granular sludge (NGS) into a microbial fuel cell (MFC) system was utilized for simultaneous electricity production and wastewater treatment. After 60 days of operation, high removal efficiencies of organic contaminants and NH4+-N were achieved, reaching 95.43% and 98.55%, respectively. Additionally, soluble microbial products (SMP) released from the anode and cathode chambers could be identified as two fluorescence components.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Mateusz Sobczyk, Agnieszka Pajdak-Stos, Edyta Fialkowska, Lukasz Sobczyk, Janusz Fyda
Summary: The study found that the species composition and community structure of activated sludge are greatly influenced by individual features of the treatment plants, with temperature being the most critical factor affecting changes in the microbial community. However, the reduction rates of COD, BOD5, SS, and TN were not sufficient to explain the variations in protozoa and metazoan community composition.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Yabing Xiao, Yao Shen, Bin Ji
Summary: This research focused on cultivating MBGS from activated sludge by inoculation. The results showed that inoculation helped in the successful formation of MBGS within a short period of time, and achieved stable removal of organics, ammonia, and phosphorus. Functional microbial communities, including phosphorus accumulating organisms, were enhanced by the inoculation.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Cyntia Ely, Irina S. Moreira, Joao Paulo Bassin, Daniela P. Mesquita, Joana Costa, Eugenio C. Ferreira, Marcia W. C. Dezotti, Paula M. L. Castro
Summary: An AGS SBR reactor adapted to salinity was used for the treatment of synthetic saline wastewater containing EDCs. The results showed that E2 was completely biodegraded, while the removal efficiency of EE2 and BPA was lower. The activity of phosphate-accumulating organisms was affected by EDCs, but the activity of ammonium- and nitrite-oxidizing bacteria was not significantly affected. The microbial diversity increased after the addition of EDCs.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Laila Dina Amalia Purba, Sasmitha Aulia Zahra, Ali Yuzir, Koji Iwamoto, Norhayati Abdullah, Kazuya Shimizu, Zhongfang Lei, Joni Hermana
Summary: This study investigated the performance of algal-bacterial aerobic granular sludge in real low-strength wastewater treatment and its potential for biodiesel production. The results showed high removal efficiencies for COD, NH4+-N, and phosphate, meeting the effluent standard. Core microbiome analysis revealed important microbial groups in the bacterial community, while photosynthetic microorganisms dominated the algal-bacterial aerobic granular sludge. High lipid content and favorable fatty acid composition were found in the granules, indicating their potential for biodiesel production.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Fan Yang, Shuai Wang, Hanxiang Li, Gonglei Wang, Yueqiao Wang, Jixiang Yang, Youpeng Chen, Peng Yan, Jinsong Guo, Fang Fang
Summary: This study compared the impacts of nitrogen and phosphorus-poor wastewater on activated sludge (AS) and found that AS could adapt to both nitrogen and phosphorus-limited conditions. Nitrogen deficiency reduced the abundance of denitrifying phosphorus-accumulating bacteria and phosphorus removal, while phosphorus deficiency reduced the abundance of nitrifying bacteria and nitrogen removal. Additionally, both nitrogen and phosphorus deficiency led to a decrease in AS aggregation, and nitrogen deficiency also reduced sludge settling performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Nico Lambert, Pieter Van Aken, Ilse Smets, Lise Appels, Raf Dewil
Summary: The integration of ultrasonic sludge disintegration in a conventional biological wastewater treatment plant has been found to reduce sludge production and improve the biodegradability of sludge. Ultrasonic treatment also improves sludge settling characteristics and leads to improved effluent quality.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Cheng Tang, Chaoyu Li, Yu Jiang, Zhaozhi Hou, Si Wang, Chuansheng Wang, Sihan Chen
Summary: This study evaluated the impact of the granulation process under salt stress in the presence of aniline on microorganisms in saline wastewater. The results showed that high salinity led to larger granules and the replacement of calcium ions by sodium ions in the granular matrix, affecting the removal of organic matter and nitrogen in wastewater.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Pei Gao, Xujia Ming, Xudong Wang, Zhixiang Chen, Yao Liu, Xianguo Li, Dahai Zhang
Summary: This study confirmed the significant role of ozone in anaerobic fermentation gas production and its ability to effectively degrade activated sludge. The mixing of primary sludge with excess sludge exhibited synergistic effects, contributing to the anaerobic fermentation of excess sludge.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Xiaolong Yu, Fumitake Nishimura, Taira Hidaka
Article
Environmental Sciences
Xiaolong Yu, Fumitake Nishimura, Taira Hidaka
SCIENCE OF THE TOTAL ENVIRONMENT
(2018)
Article
Agricultural Engineering
Masato Nakamura, Taira Hidaka, Masaru Yamaoka, Fumiko Oritate
PADDY AND WATER ENVIRONMENT
(2019)
Article
Engineering, Environmental
Peng Wan, Mengxi Yuan, Xiaolong Yu, Zheng Zhang, Baolin Deng
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Engineering, Environmental
Taira Hidaka, Masato Nakamura, Fumiko Oritate, Fumitake Nishimura
WATER SCIENCE AND TECHNOLOGY
(2019)
Article
Agricultural Engineering
Xiaolong Yu, Fumitake Nishimura, Taira Hidaka
BIORESOURCE TECHNOLOGY
(2020)
Article
Environmental Sciences
Xiaolong Yu, Juan Zhang, Yan Zheng
Summary: A novel epichlorohydrin crosslinked chitosan hydrogel beads (ECH-CSBs) were synthesized for perchlorate (ClO4-) adsorption. The study showed that ECH-CSBs exhibited excellent adsorption performance and reusability for ClO4-, with high adsorption capacity and complete regeneration achieved through rinsing.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Xiaolong Yu, Yousuke Nakamura, Masanari Otsuka, Daisuke Omori, Shinsuke Haruta
Summary: A new system for recovering phosphorus from incinerated sewage sludge ash (ISSA) was proposed in this study, with laboratory tests showing high recovery rates and product purity. The system proved to meet fertilizer standards and be cost-effective, providing a practical alternative for phosphorus recovery.
Article
Environmental Sciences
Taira Hidaka, Satoshi Suzuki, Fumitake Nishimura
Summary: Rhodospirillaceae grew in the filtrate of digested sludge samples, whereas it did not grow in the unfiltered digested sludge samples. Addition of acetate at 400 mg/L per day promoted the growth of PSB. Monitoring PSB growth can be achieved through carotenoid measurements by comparing the carotenoids, pufM copy numbers, and microbial structures in the culture liquids.
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Environmental Sciences
Taira Hidaka, Masato Nakamura, Fumiko Oritate, Fumitake Nishimura
Summary: This study compared the anaerobic digestion of sewage sludge at different temperatures and found that anaerobic digestion at low temperatures can be an efficient and cost-effective method. Pre-treatment improved digestion efficiency and reduced energy consumption. Additionally, as the digestion temperature decreased, the number of E. coli in the digested sludge increased.