Review
Environmental Sciences
Yankai Liang, Rui Wang, Wenquan Sun, Yongjun Sun
Summary: This article analyzes the composition and properties of municipal sludge and examines the factors affecting its dewatering performance. It introduces various chemical conditioning methods and systematically analyzes the principles and applications of existing sludge conditioning technologies. It emphasizes the importance of developing a more appropriate combination of sludge conditioning and dewatering processes and optimizing the dewatering process by developing new efficient and environmentally friendly sludge conditioning agents.
Article
Engineering, Environmental
Xian Yang, Liuting Zeng, Jinjia Huang, Zhihua Mo, Zhijie Guan, Shuiyu Sun, Jialin Liang, Shaosong Huang
Summary: The high moisture content of sludge is a key factor limiting its subsequent treatment and disposal. A novel method using MnFe2O4-biochar activated peroxymonosulfate combined with tannic acid was effective in improving sludge dewaterability. The treatment not only enhanced the sludge dewaterability and calorific value, but also improved the pore structure of sludge biochar, showing promise for resource utilization.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Wenjian Gao, Lei Song, Zehao Wang, Lili Xuan
Summary: In this study, an advanced oxidation process using FeS2 and PMS was proposed to improve the dewaterability of waste activated sludge. The combination of FeS2 + PMS + P-BC effectively improved the sludge dewatering effect through oxidation, resulting in reduced water content and specific resistance to filtration. The study also found changes in sludge particle size, ζ potential, and extracellular polymeric substances (EPS) due to FeS2 + PMS + P-BC treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Shaodong Guo, Yuxin Huang, Long Zhou, Xinghu Huang
Summary: The study utilized electrolysis zero-valent iron activated peroxymonosulfate (EZVI-PMS) to enhance sludge dewaterability and disintegration performance, revealing significant reduction in sludge CST and SRF, as well as DNA release from sludge cells. The transformation of EPS, protein, and polysaccharides in sludge was observed, indicating a conditioning mechanism where TB-EPS converted to SB-EPS with noticeable changes in DOC and protein content.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Jie Li, Shaoqin Ru, Chenwei Yuan, Bo Wu, Yiwen Ji, Zijun Dai, Zhongfang Lei, Zhenya Zhang, Tian Yuan, Fengting Li, Misha Liu
Summary: The combined use of PDMD and TA as an all-organic co-conditioning method for sewage sludge pretreatment was investigated. The results showed that this method effectively improved the dewaterability of sewage sludge and achieved the highest dewatering efficiency reported so far. The combination of PDMD and TA maximized the treating efficiency with limited consumption of conditioners.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Nannan Geng, Yili Wang, Daxin Zhang, Xiaoyang Fan, Enrui Li, Zhibo Han, Xiaoqi Zhao
Summary: This study developed an electro-peroxone oxidation-Fe(III) coagulation sequential conditioning approach to improve the dewaterability of waste activated sludge (WAS). The results showed that under optimal conditions, this approach significantly reduced the specific resistance to filterability and capillary suction time, as well as decreased the bound water content of WAS. The physicochemical properties of WAS, including composition, functional groups, and protein secondary structure, were affected by this sequential conditioning process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Xu Kang, Chaolin Li, Wanqing Ding, Yuhao Ma, Xu Zhou, Shuhong Gao, Chuan Chen, Wenzong Liu, Zhongqi He, Xuan Li, Guangming Jiang
Summary: The feasibility of using bio-enzymes with Fe2+-activated advanced oxidation processes (AOPs) for waste activated sludge (WAS) conditioning was investigated. Results showed that neutral protease combined with the Fe2+/Ca(ClO)2 system performed better in CST and SRF reduction rates while reducing the AOPs dosages. Under the optimal conditions, the reduction in sludge CST and SRF reached 84.81% and 94.06% respectively. The neutral protease with the Fe2+/Ca(ClO)2 system was a potential method for improving sludge dewatering performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Natalia Gemza, Kamil Janiak, Bartosz Zieba, Jacek Przyszlak, Magdalena Kusnierz
Summary: This study presents the long-term effects of a full-scale hydrocyclone unit on sedimentation, treatment efficiency, and sludge morphology in a continuous flow system. The research focuses on understanding the mechanisms of sludge behavior within the system. The findings show that temperature variations and overgrowth of filamentous bacteria can impact sedimentation efficiency, and sludge separated by the hydrocyclone exhibits higher settling velocity and a more compact, spherical morphology.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Jiahua Xia, Ting Rao, Juan Ji, Bijuan He, Ankang Liu, Yongjun Sun
Summary: The study investigated the performance of fly ash, polymerized aluminum chloride (PAC), and polymer sulfate (PFS) as conditioners for sludge dewatering. It was found that the composite regulation method could improve the dewatering efficiency of the sludge. The coupling of fly ash with PAC or PFS was considered to be a promising environmentally-friendly combined conditioning method.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Chemistry, Multidisciplinary
Wei Fang, Xuedong Zhang, Henri Spanjers, Tao Zhang
Summary: This study found that direct addition of persulfates into the fermenter can enhance VFA production from waste activated sludge, with lower cost-effectiveness for PMS compared to PDS, and preactivation not being necessary. The generated radicals from persulfates in the fermenter enhance WAS disintegration and solubilization, promoting the formation of biodegradable substances.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
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
Environmental Sciences
Xuejie He, Lei He, Ziyuan Lin, Jiong Zhou, Shuohui Shi, Yi Liu, Jian Zhou
Summary: This study developed a sludge composite conditioner (SCC) to significantly improve the dewaterability of high-organic sludge, achieved by promoting dissolution of extracellular polymeric substances, enhancing decomposition of sludge flocs, and increasing sludge particle size.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Engineering, Chemical
Yuxin Zhang, Zichen Ling, Miaomiao Zhao, Li Sha, Chen Li, Xuebin Lu
Summary: This study designed a technique using acid-magnetic powder conditioning as a pretreatment for sludge electro-dewatering, and found that acid-magnetic powder conditioning can greatly enhance the dewatering efficiency. It enhances the electro-dewatering effect mainly by destroying the substrate and reducing the sludge resistance. Additionally, there was a significant decrease in sludge impedance after conditioning.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Environmental
Shihui Gao, Yili Wang, Daxin Zhang, Xiaoyang Fan, Yajie Guo, Enrui Li, Huaili Zheng
Summary: The combined conditioning of peroxone-Fe(III) can significantly enhance the horizontal electro-dewatering effect of activated sludge, reducing bound water content and improving physicochemical properties and structural components. Through successive treatments, the EPS network structure can be effectively disrupted, releasing bound water and extracting key components, ultimately achieving the dewatering effect of AS.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Dongdong Ge, Yidan Zhu, Guobiao Li, Haiping Yuan, Nanwen Zhu
Summary: The Fe2+-activated persulfate conditioning process plays a key role in enhancing sludge dewaterability through the destruction and re-building of sludge flocs. The findings provide theoretical and technical support for the practical engineering implementation of this process.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Daxin Zhang, Yili Wang, Hongyu Gao, Xiaoyang Fan, Yajie Guo, Hongjie Wang, Huaili Zheng
Article
Environmental Sciences
Xiaoyang Fan, Yili Wang, Daxin Zhang, Yajie Guo, Shihui Gao, Enrui Li, Huaili Zheng
JOURNAL OF ENVIRONMENTAL SCIENCES
(2020)
Article
Engineering, Environmental
Shuoxun Dong, Yili Wang, Junyi Li, Daxin Zhang, Yanqin Zhou, Yao Tong
CHEMICAL ENGINEERING JOURNAL
(2020)
Correction
Environmental Sciences
Xiaoyang Fan, Yili Wang, Daxin Zhang, Yajie Guo, Shihui Gao, Enrui Li, Huaili Zheng
JOURNAL OF ENVIRONMENTAL SCIENCES
(2021)
Article
Engineering, Environmental
Shihui Gao, Yili Wang, Daxin Zhang, Xiaoyang Fan, Yajie Guo, Enrui Li, Huaili Zheng
Summary: The combined conditioning of peroxone-Fe(III) can significantly enhance the horizontal electro-dewatering effect of activated sludge, reducing bound water content and improving physicochemical properties and structural components. Through successive treatments, the EPS network structure can be effectively disrupted, releasing bound water and extracting key components, ultimately achieving the dewatering effect of AS.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Daxin Zhang, Yili Wang, Junyi Li, Xiaoyang Fan, Enrui Li, Shuoxun Dong, Weiwen Yin, Dongsheng Wang, Baoyou Shi
Summary: This study proposed an electrical impedance spectroscopy (EIS) method and constructed a generalized framework to associate macroscale electrical properties with microscopic structure and size-related characteristics of aggregates. The models extracted via EIS were capable of describing the self similarity of aggregates and capturing the fractal and size information. The EIS method exhibited a wide range of applications in water and wastewater treatment.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Environmental Sciences
Nannan Geng, Yili Wang, Daxin Zhang, Xiaoyang Fan, Enrui Li, Zhibo Han, Xiaoqi Zhao
Summary: This study developed an electro-peroxone oxidation-Fe(III) coagulation sequential conditioning approach to improve the dewaterability of waste activated sludge (WAS). The results showed that under optimal conditions, this approach significantly reduced the specific resistance to filterability and capillary suction time, as well as decreased the bound water content of WAS. The physicochemical properties of WAS, including composition, functional groups, and protein secondary structure, were affected by this sequential conditioning process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Daxin Zhang, Yili Wang, Shuoxun Dong, Xiaoqi Zhao, Xiaoyang Fan, Zhibo Han, Nannan Geng, Zhiqiang Zhang
Summary: This study investigated the key mechanisms affecting water release in sludge flocs and developed an online quantifier, based on electrical impedance spectroscopy analysis, to determine dewaterability in real-time. The results showed that both floc structural resistance and viscous resistance of pores affected water release. The developed online quantifier, called normalized spectral dimension, exhibited strong linear correlations with sludge dewaterability in two typical sludge conditioning processes. The findings may contribute to the development of smart sludge treatment technologies.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Weiwen Yin, Baogang Zhang, Han Zhang, Daxin Zhang, Tiina Leiviska
Summary: This study investigated the distribution of vanadium (V) and microplastics in soil at a V smelting site and their effects on microbial community dynamics and assembly. The results showed that both V and microplastics were present in the soil profile, with different microbial community compositions in the topsoil and subsoil. V and microplastics had direct impacts on the microbial structure in the topsoil and indirect influences in the subsoil. Deterministic processes were more prevalent in community assembly in the topsoil, while stochastic processes governed the subsoil. The interspecific relationship was closer in the topsoil with greater network complexity and higher modularity.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Yaqian Zhou, Ying Lian, Tengxiang Liu, Xian Jin, Zhigang Wang, Xin Liu, Mengling Zhou, Dan Jing, Weiwen Yin, Jiaying Feng, Heli Wang, Daxin Zhang
Summary: Coal mine water is often reused for aquatic ecosystems in arid and semiarid mining regions of China. Although it undergoes rigorous treatment to meet water quality standards, the impact on receiving water bodies is still uncertain.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.