Article
Engineering, Environmental
Bao-Shan Xing, Yi Zhang, Rui-Qi Zhang, Jing Ma, Xiang-Lin Chang, Xi-Fang Tang, Yu-You Li, Xiaochang C. Wang, Rong Chen
Summary: In this study, a new type of anaerobic dynamic membrane bioreactor (AnDMBR) was designed and operated in parallel with a conventional continuous stirred tank reactor (CSTR) to enhance the substrate conversion efficiency and improve the reactor stability of codigestion with waste activated sludge (WAS) and food waste (FW). The results showed that the AnDMBR achieved a higher methane yield and maintained stable conditions compared to the CSTR. The dynamic membrane performance of the AnDMBR was also effective in intercepting the substrate and microorganisms during long-term periodic operation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Bao-Shan Xing, Xiaochang C. Wang
Summary: High-rate mesophilic CSTR co-digestion of waste activated sludge and food waste achieved efficient methane production with a maximum yield of 12.9 L/L/day at an OLR of 48.1 g-COD/L/day. The stable operation was maintained at OLR of 50.8-52.1 g-COD/L/day and SRT of 2.56-2.63 days without VFA accumulation, highlighting the key role of the genus Methanosarcina in high-performance anaerobic digestion.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Fu-Qiang Chen, Yong-Zhi Chi, Kai-Xiong Li, Yanming Zhang, Zhe Tian, Xue-Ning Fei, Yu-You Li
Summary: This study investigated the performance of TADP and MADP fed with NaOH-microwave pretreated waste activated sludge. The results showed that MADP had lower methane production and reduction of organic matters compared to TADP, but had better dewatering performance for mesophilic sludge. Therefore, MADP is more suitable for the NaOH-MW pretreatment process.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Agricultural Engineering
Zhetai Hu, Weiwei Li, Haoran Duan, Xin Huang, Jia Meng, Liangzhen Yang, Min Zheng
Summary: This study proposed an integrated approach to efficiently recover phosphorus (P) as vivianite from waste activated sludge (WAS) and simultaneously enhance sludge dewaterability. Acidification and Fe3+ reduction were conducted to convert Fe and P from solid phase to liquid phase. Acid-elutriation technology was then introduced to enhance liquor-solid separation. Finally, vivianite was obtained via sludge eluate neutralization. The enhanced sludge dewaterability not only increases the recovery efficiency of Fe and P but also decreases the cost of sludge disposal.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Shuaishuai Li, Yuling Liu, Chuanchuan Dou, Ruihao Sun
Summary: This study explores the pretreatment of sludge using thermally activated sodium persulfate-biochar skeleton to improve its dewaterability. It demonstrates that under optimal conditions, the water content of waste activated sludge can be significantly reduced while capillary suction time and specific resistance to filtration are improved. The study proposes a relationship between organic matter migration and sludge physical structure and elucidates the mechanism behind the improvement in dewaterability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Agricultural Engineering
Marco Chiappero, Franco Berruti, Ondrej Masek, Silvia Fiore
Summary: The study analyzed the effects of Biochar addition on the Anaerobic digestion of wastewater Mixed sludge in semi-continuous mode, showing that the variability of the substrate's composition was the key factor driving the performances of the AD process, independently of the addition of BC.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Xiaodi Li, Bo Wang, Yuqing Ma, Tan Jiang, Yongzhen Peng
Summary: This study investigated the reduction of nitrate in waste activated sludge fermentation and found that nitrate promoted the release of organic matter in sludge and enhanced its biodegradability. The destruction of volatile suspended solids was increased significantly in the presence of nitrate. Nitrate reduction also promoted sludge hydrolysis and acetogenesis, but slightly inhibited acidogenesis. This study provides a feasible method to address the overabundance of waste activated sludge and the lack of carbon sources in the denitrification process.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Huan Liu, Xuan Li, Ting Zhou, Zehao Zhang, Long D. Nghiem, Li Gao, Qilin Wang
Summary: This study comprehensively evaluated the impact of free ammonia (FA) pretreatment on the performance of anaerobic primary sludge (PS) digestion using semi-continuous systems. FA pretreatment improved the removal of volatile solids, chemical oxygen demand, and methane production. It also increased the biomass-specific hydrolysis rate of digesters. Model-based analysis revealed that the enhanced performance is due to the increased apparent hydrolysis rate and degradability extent of PS caused by FA pretreatment. Additionally, dewaterability of digested sludge and removals of fecal coliform and E. coli were enhanced by FA pretreatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Jiamin Zhao, Tingting Hou, Zhongfang Lei, Kazuya Shimizu, Zhenya Zhang
Summary: A biogas recirculation-driven anaerobic digestion system was developed in this study, coupled with an alkali addition strategy, which not only improved biogas upgrading efficiency but also enhanced sludge settleability and dewaterability, reducing sludge management costs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Tingting Xiao, Hui Wang, Xiankai Wang, Haibin Wu, Shijie Yuan, Xiaohu Dai, Bin Dong
Summary: By using heated modification drinking water sludge (HDWS) as a conditioner to enhance the dewaterability of waste activated sludge (WAS) through its properties, the collaborative disposal of drinking water sludge (DWS) and waste activated sludge (WAS) can be achieved. The mechanism of HDWS+O-3 enhanced WAS dewaterability was explained through pyridine-infrared analysis and density functional theory (DFT) calculations. The discovery of HDWS+O-3 applied to effectively enhance WAS dewaterability provides an inspiring perspective on the emerging DWS and WAS co-processing disposition.
Article
Engineering, Environmental
Jing Ai, Zhiyue Wang, Dionysios D. Dionysiou, Ming Liu, Yun Deng, Mingyue Tang, Guiying Liao, Aibin Hu, Weijun Zhang
Summary: The study utilized Fe(II)-sulfite oxidation and polyacrylamide flocculation (F/S-PAM) treatment to remove the bound water in waste activated sludge and improve sludge dewaterability. The radicals generated by F/S could decompose EPS, releasing bound water, while PAM caused re-flocculation of disintegrated sludge flocs, enhancing sludge filterability.
Article
Environmental Sciences
Wenbo Yu, Yanlei Wan, Yu Wang, Yuwei Zhu, Shuangyi Tao, Qi Xu, Keke Xiao, Sha Liang, Bingchuan Liu, Huijie Hou, Jingping Hu, Jiakuan Yang
Summary: The study showed that the addition of trivalent cations and Fenton's reagent can improve sludge dewaterability by reducing the energy barrier and repulsive force between sludge flocs, converting hydrophilic surfaces to hydrophobic, and decreasing the Lewis acid-base interaction energy of sludge flocs.
ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Shuyu Ruan, Jing Deng, Anhong Cai, Shengnan Chen, Yongqing Cheng, Jun Li, Qingsong Li, Xueyan Li
Summary: The study utilized the thermally-activated sodium persulfate process to improve the dewaterability of waste activated sludge, where SPS decomposition at mild temperature generated radicals that oxidized EPS and facilitated solid-liquid separation, enhancing sludge dehydration.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Boran Wu, Hao Wang, Wenxuan Li, Xiaohu Dai, Xiaoli Chai
Summary: This study focuses on the variation in molecular compositions of EPS induced by •OH and its effects on the water occurrence states of waste-activated sludge (WAS). The results indicate that hydrophilic functional groups have a greater impact on the water-holding capacity of EPS. It is clarified that selectively removing hydrophilic functional groups is more effective for highly-efficient sludge conditioning approaches than improving •OH production efficiency.
Article
Engineering, Environmental
Jie Ye, Yue Lai, Chao Wang, Raymond Jianxiong Zeng, Changgeng Liu, Hao Lin, Shungui Zhou, Zhen He
Summary: An electrochemically driven Fe-0-activated sulfite system was developed to sustainably release Fe2+ for dewatering waste activated sludge. The system improved dewatering performance by degrading extracellular polymeric substances, reducing the live/dead cell ratio, and increasing the permeability of sludge flocs. The thermal effect in the system accelerated the release of intracellular proteins, which could be degraded by the strong oxidizing sulfate radicals. Understanding these sulfate radical-based advanced oxidation processes is important for sludge treatment.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Oscar Samuelsson, Anders Bjork, Jesus Zambrano, Bengt Carlsson
WATER SCIENCE AND TECHNOLOGY
(2017)
Article
Energy & Fuels
Eva Thorin, Jesper Olsson, Sebastian Schwede, Emma Nehrenheim
Article
Biology
Stefan Diehl, Jesus Zambrano, Bengt Carlsson
MATHEMATICAL BIOSCIENCES
(2018)
Article
Engineering, Environmental
J. Olsson, S. Schwede, E. Nehrenheim, E. Thorin
WATER SCIENCE AND TECHNOLOGY
(2018)
Article
Engineering, Environmental
Oscar Samuelsson, Jesus Zambrano, Anders Bjork, Bengt Carlsson
Article
Chemistry, Multidisciplinary
Aubrey Shenk, Jean-Paul A. Ivan, Sebastian Schwede, Monica Odlare
Summary: This article summarizes and analyzes recent experimental research on ammonium recovery from aqueous sources using biochar. The lack of consistency in experimental methods and characteristic measurement reporting makes it difficult to draw conclusions about ammonium adsorption mechanisms. The importance of BET surface area and NH4+ concentration in ammonia recovery is strongly supported, while the importance of cation exchange capacity and pyrolysis temperature has weaker support. Standardized procedures for biochar production, experiments, and analysis of physical and chemical characteristics are needed for meaningful comparison of results.
APPLIED SCIENCES-BASEL
(2022)
Article
Water Resources
Jesus Zambrano, Oscar Samuelsson, Bengt Carlsson
APPLIED WATER SCIENCE
(2019)
Proceedings Paper
Energy & Fuels
Bin Wang, Hailong Li, Jinying Yan, Eva Thorin, Sebastian Schwede, Kai Zhu
JOINT INTERNATIONAL CONFERENCE ON ENERGY, ECOLOGY AND ENVIRONMENT ICEEE 2018 AND ELECTRIC AND INTELLIGENT VEHICLES ICEIV 2018
(2018)
Proceedings Paper
Energy & Fuels
Chaudhary Awais Salman, Sebastian Schwede, Eva Thorin, Jinyue Yan
INTERNATIONAL CONFERENCE ON ADVANCES IN ENERGY SYSTEMS AND ENVIRONMENTAL ENGINEERING (ASEE17)
(2017)
Article
Energy & Fuels
Chaudhary Awais Salman, Sebastian Schwede, Eva Thorin, Jinyue Yan
Article
Environmental Sciences
Anbarasan Anbalagan, Sebastian Schwede, Carl-Fredrik Lindberg, Emma Nehrenheim
Article
Energy & Fuels
Iana Vassileva, Javier Campillo, Sebastian Schwede
Article
Engineering, Environmental
S. Diehl, J. Zambrano, B. Carlsson
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2017)