Review
Engineering, Environmental
Liang Zhang, Yan-Ying Qiu, Yan Zhou, Guang-Hao Chen, Mark C. M. van Loosdrecht, Feng Jiang
Summary: Biochemical oxidation and reduction processes using elemental sulfur have emerged as cost-effective and attractive alternatives for water and wastewater treatment, offering benefits such as reduced operational costs, avoidance of secondary pollution, and efficient mineralization of organic matter.
Review
Agricultural Engineering
Lixin Li, Taojie Liang, Mengjie Zhao, Ying Lv, Zhiwei Song, Tao Sheng, Fang Ma
Summary: This article analyzes the theoretical basis and mechanism of mycelial pellets as a biological carrier, and introduces their applications and development trends in wastewater treatment and energy recovery. The symbiotic system of mycelial pellets and microalgae is considered an important means to solve the technical challenges of biodiesel recovery from wastewater.
BIORESOURCE TECHNOLOGY
(2022)
Review
Agricultural Engineering
Shashi Kant Bhatia, Vishal Ahuja, Neha Chandel, Sanjeet Mehariya, Pradeep Kumar, Vandana Vinayak, Ganesh Dattatraya Saratale, Tirath Raj, Sang-Hyoun Kim, Yung-Hun Yang
Summary: Excessive generation of wastewater is a global concern, and wastewater treatment utilizing microalgae-mediated process is considered an environmentally friendly and sustainable method. However, low biomass productivity, costly harvesting process, and energy extensive cultivation process are major challenges. The use of microalgal-bacteria granular consortia (MBGC) process is cost-effective and requires less energy, but understanding the structure, composition, and interaction of MBGC is important for its efficient utilization.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Jiahua Guo, Yu Li, Jianliang Sun, Rongrong Sun, Shunjie Zhou, Jiajun Duan, Wenwen Feng, Guangli Liu, Feng Jiang
Summary: Both biological sulfate reduction process and sulfur reduction process are effective technologies for metal-laden wastewater treatment, but the former shows stability under acidic conditions while the latter is unstable. The microbial community plays a crucial role in sulfidogenic activities and operational cost of the processes.
Review
Environmental Sciences
Ziyi Liu, Stephen R. Smith
Summary: Enzymes are valuable industrial bio-catalysts with high catalytic efficiency, and extracting enzymes from waste activated sludge offers a cost-effective approach for industrial production. The extraction process can be technically feasible and the purified enzymes can substitute inorganic catalysts in various industrial applications, ultimately providing significant economic benefits and valuable resources to the Water Industry.
WASTE AND BIOMASS VALORIZATION
(2021)
Review
Agricultural Engineering
Ranjna Sirohi, Jaemin Joun, Ji Young Lee, Byung Sun Yu, Sang Jun Sim
Summary: This review discusses the use of novel microalgal-bacterial consortium as a solution for the treatment and resource recovery of dairy, starch and aquaculture wastewater. Biofilm reactors containing anaerobic and aerobic sludge have shown high COD and nutrient removal efficiency in the treatment of dairy and starch processing wastewater. However, treatment of aquaculture processing wastewater requires a salt-tolerant bacteria-microalgae consortium.
BIORESOURCE TECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Komal Poonia, Pardeep Singh, Archana Singh, Sourbh Thakur, Quyet Van Le, Tansir Ahamad, Pankaj Raizada, Chuanyi Wang, Lan Huong Nguyen, Van-Huy Nguyen
Summary: This paper reviews the applications of photoelectrocatalysis in wastewater purification and energy recovery. The basics of photoelectrocatalysis, charge kinetics, photoelectrode selection and performance are discussed, along with modification strategies such as heterostructure formation and doping. The paper also presents applications of photoelectrocatalysis in hydrogen production, carbon dioxide reduction, energy production, and microbial fuel cells.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Green & Sustainable Science & Technology
A. B. Mpofu, W. M. Kaira, G. A. Holtman, O. O. Oyekola, R. P. van Hille, P. J. Welz
Summary: A novel integrated biological system consisting of hybrid linear flow channel reactor (HLFCR) and anaerobic sequential batch reactor (AnSBR) was investigated for efficient treatment of tannery wastewater and recovery of sulfur and methane resources. The system demonstrated high feasibility for anaerobic digestion by utilizing single-stage and two-stage HLFCR topologies with different hydraulic retention times (HRT). The full-scale implementation of the system in a medium sized tannery had significant potential revenue from the sale of recovered resources and savings from reduced electricity demand and sludge disposal.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Agricultural Engineering
Haifeng Lu, Guangming Zhang, Changjie Wang, Ting Han, Ruihan Zhao, Da Zhu
Summary: The study demonstrates that flashing light can increase biomass production and reduce energy consumption in purple non-sulfur bacteria. By reducing light provision time and increasing relative electron transportation rate, photoinhibition can be avoided, promoting energy utilization and substance synthesis.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Priyanka Verma, Achlesh Daverey, Ashok Kumar, Kusum Arunachalam
Summary: Microbial fuel cell (MFC) is a sustainable technology that utilizes the oxidation of organic matter by microorganisms in wastewater to generate bioelectricity, making wastewater treatment plants energy neutral or even net energy producers. The review provides a comprehensive overview of the fundamentals, types, and key process parameters of MFC, along with recent applications and challenges in implementing MFC in full-scale wastewater treatment plants.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Energy & Fuels
Pablo M. Binder, Nicola Frison, Nagore Guerra-Gorostegi, Ipan Hidayat, Lidia Paredes, Laia Llenas, Enric Blazquez, Mabel Mora, Matteo Ballottari, Stefano Cazzaniga, Francesco Fatone, Sergio Ponsa Salas
Summary: Wastewater treatment-derived sludge is a growing concern due to environmental issues, increasing production rates, and regulations. This study shows the technical feasibility of obtaining valuable products like animal feeds, bioplastics, biofuels, and fertilizers from sludge. Novel valorization pathways, such as microalgae and purple bacteria cultures growing over sludge, are explored and found to be effective in producing high-quality proteins and nutrient-rich biomass.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Engineering, Environmental
Guan Wang, Kai Tang, Adam C. Hambly, Yifeng Zhang, Henrik Rasmus Andersen
Summary: This paper presents a new method for Fenton treatment of complex wastewater using a novel bioelectrode system. The new system eliminates the need for additional dosing of Fe(II) and H2O2, prevents iron-sludge accumulation, and reduces consumption of pH regulators. The experimental results demonstrate that the method is efficient in removing dissolved organic carbon and specific recalcitrant organics.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Qingnan Yu, Xinyu Pei, Yanping Wei, Sadiq Naveed, Siting Wang, Mengxuan Chang, Chunhua Zhang, Ying Ge
Summary: This review summarizes the advantages of microalgae-bacteria consortia (MBCs) in wastewater treatment, resource recovery, and CO2 sequestration. However, most studies have focused on the overall functions of MBCs without comparing the effects of different bacterial sources and strains on MBC performance.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Biotechnology & Applied Microbiology
S. Shaikh, N. Rashid, G. McKay, A. R. Liberski, H. R. Mackey
Summary: This research investigates the integration of purple non-sulfur bacteria (PNSB) biomass production with treatment of fuel synthesis wastewater (FSW) for a low-cost substrate and improved harvesting through biofilm formation. The study shows that a nitrogen-deficient biofilm-based system has potential to reduce costs while producing high value-added resources.
BIOCHEMICAL ENGINEERING JOURNAL
(2023)
Review
Environmental Sciences
Sumira Malik, Shristi Kishore, Archna Dhasmana, Preeti Kumari, Tamoghni Mitra, Vishal Chaudhary, Ritu Kumari, Jutishna Bora, Anuj Ranjan, Tatiana Minkina, Vishnu D. Rajput
Summary: Sustainable microbial fuel cell (MFC) technology has great potential in wastewater treatment, with simultaneous energy and nutrient recovery and reduced environmental pollution. The electrochemical treatment mechanism of MFCs and improvements in their structure, biocatalysts, materials, and removal of contaminants are crucial for practical applications of MFCs. With proper planning and further research, industrialization of MFCs can provide greener fuels and a cleaner environment for mankind.
Article
Environmental Sciences
Vania S. Bessa, Irina S. Moreira, Mark C. M. Van Loosdrecht, Paula M. L. Castro
Summary: The study found that the micropollutant diclofenac does not significantly affect wastewater treatment processes, but does impact the microbial community structure within the system. Integrated strategies are needed to reduce the spread of micropollutants in the environment.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Ecology
Martin Pabst, Denis Grouzdev, Christopher E. Lawson, Hugo B. C. Kleikamp, Carol de Ram, Rogier Louwen, Yuemei Lin, Sebastian Lucker, Mark C. M. van Loosdrecht, Michele Laureni
Summary: The vast chemical diversity and strain variability of prokaryotic protein glycosylation pose significant challenges for large-scale exploration. A newly established mass binning glycoproteomics approach was used to uncover a variety of oligosaccharides in anaerobic ammonium-oxidizing bacterium Ca. Kuenenia stuttgartiensis, showing two seemingly unrelated biosynthetic routes and modulation related to energy metabolism. The study provides insights into the compositional exploration of prokaryotic protein glycosylation and showcases an example of the evolution of complex oligosaccharides in bacteria.
Article
Environmental Sciences
Lenno van den Berg, Mario Pronk, Mark C. M. van Loosdrecht, Merle K. de Kreuk
Summary: This study compared four methods to measure the density of granular sludge in a full-scale plant treating domestic sewage, and assessed the effect of salinity on granule density. Most methods yielded reliable results, as long as the effect of salinity was considered.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
S. de Bruin, D. Vasquez-Cardenas, S. M. Sarbu, F. J. R. Meysman, D. Z. Sousa, M. C. M. van Loosdrecht, Y. Lin
Summary: This study analyzed the presence of sGAG in acidophilic biofilm samples collected from Sulfur Cave in Romania. Results showed that the recovered sGAG had a structure similar to chondroitin and contained polysaccharides and sulfate. Genomic sequence analysis supported the hypothesis that sGAGs are synthesized by microbes within the biofilm.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Xiaodi Hao, Wenbo Yu, Tugui Yuan, Yuanyuan Wu, Mark C. M. van Loosdrecht
Summary: This study aimed to determine the key factors controlling vivianite formation. The results showed that the amount of Fe3+ in WAS was the main factor controlling vivianite formation. In practice, a Fe/P molar ratio of 2:1 should be ensured for vivianite formation in AD.
Article
Engineering, Environmental
David Calderon-Franco, Roel Sarelse, Stella Christou, Mario Pronk, Mark C. M. van Loosdrecht, Thomas Abeel, David G. Weissbrodt
Summary: In the context of One Health, wastewater treatment plants play a crucial role in preventing the dissemination of antimicrobial resistance. However, current surveillance studies focus mainly on monitoring intracellular DNA, while the role of extracellular free DNA is often overlooked. This study found that in the process of wastewater treatment, the exDNA fractions containing resistance determinants and mobile genetic elements need to be considered for AMR surveillance and risk assessment.
Article
Engineering, Chemical
Ojima Z. Wada, Annette Vincent, Gordon McKay, Hamish R. Mackey
Summary: This study examines the feasibility of recovering aqua-feed bioproducts using fuel-synthesis process water (FSPW) as a feedstock for purple non-sulfur bacteria (PNSB). The results show that PNSB cultured in the zero-nitrogen feedstock have high protein content, substantial lipids and pigments, and can reduce FSPW organics by over 70%. Light intensity significantly affects biomass constituents and treatment efficiency. These findings are promising for the development of a circular economy for converting FSPW into aqua-feed.
CHEMICAL ENGINEERING & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Laurence Strubbe, Edward J. H. van Dijk, Pascalle J. M. Deenekamp, Mark C. M. van Loosdrecht, Eveline I. P. Volcke
Summary: In the pursuit of reducing carbon footprint and energy costs, energy efficiency is crucial. This study focused on aerobic granular sludge reactors and found that they consume up to 50% less energy compared to conventional activated sludge systems. The study also investigated the dynamic behavior of the alpha factor and identified exchange ratio and temperature as the main influencing factors on its rate of increase during the aeration phase.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Sadiye Kosar, Onur Isik, Busra Cicekalan, Hazal Gulhan, Seyma Cingoz, Mustafa Yoruk, Hale Ozgun, Ismail Koyuncu, Mark C. M. van Loosdrecht, Mustafa Evren Ersahin
Summary: Achieving a neutral/positive energy balance without compromising discharge standards is a key goal in wastewater treatment plants. This study explores the coupling of high-rate activated sludge (HRAS) process with aerobic granular sludge (AGS) process as an energy-efficient pre-treatment option. The results show that feeding the AGS process with a mixture of HRAS process effluent and raw municipal wastewater can increase energy recovery potential and maintain high effluent quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Construction & Building Technology
Amir Tabakovic, Jeremy Lemmens, Jelmer Tamis, Dave van Vliet, Sayeda Nahar, Willem Suitela, Mark van Loosdrecht, Greet Leegwater
Summary: Bitumen is essential in asphalt pavements for its binding properties and ability to restore damage caused by traffic loading. With the decline in crude oil production, there is a need to find environmentally sustainable alternatives for bitumen modifiers. This paper investigates the potential use of the bio-based co-polymer PHBV as an alternative bitumen modifier and presents positive results from various tests.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Review
Environmental Sciences
Moeen Gholami, Aisling D. O'Sullivan, Hamish R. Mackey
Summary: This critical review comprehensively analyzes the scientific literature on nutrient removal from greywater in green walls. The study discusses nutrient removal efficiency in different types of green walls and investigates the specific nutrient removal mechanisms orchestrated by vegetation, substrates, and biofilms within green walls. The effects of key design parameters such as substrate depth, particle and pore size, hydraulic loading rate, and customized watering cycles on nutrient removal are assessed. The findings suggest that greater substrate depth, appropriate particle and pore size, and optimal hydraulic loading rate and watering cycles can enhance nutrient removal efficiency in green walls.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Navid Ahmadi, Mona Abbasi, Ali Torabian, Mark C. M. van Loosdrecht, Joel Ducoste
Summary: The transformation of four pharmaceuticals in a moving bed biofilm reactor was investigated under different COD/N ratios. Changes in the COD/N ratio influenced the competition between heterotrophic and nitrifying communities, resulting in shifts in microbial populations and composition in the biofilms. Autotrophic conditions exhibited higher transformation rates, indicating the importance of nitrification.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Materials Science, Characterization & Testing
Nam Kyeun Kim, Debes Bhattacharyya, Mark van Loosdrecht, Yuemei Lin
Summary: This research developed a bio-based flame retardant using a biopolymer derived from wastewater sludge to enhance the fire performance of polypropylene (PP). The study found that the extracellular polymeric substances (EPS) from wastewater sludge played a significant role in improving the char formation of PP composite. The incorporation of the bio-based flame retardant restricted the vertical burning characteristics of PP and improved its tensile moduli.
Review
Biotechnology & Applied Microbiology
Sultan Shaikh, Naim Rashid, Gordon Mckay, Hamish Robert Mackey
Summary: This review paper provides an overview of various types of photobioreactors that could be used for PHA production using anoxygenic photoheterotrophs. It focuses on the design and operation of these systems, highlighting their potential, advantages, and disadvantages. The optimization of reactor design and operation is crucial for maximizing PNSB growth and PHA productivity.
FERMENTATION-BASEL
(2023)
Article
Microbiology
Sergio Tomas-Martinez, Le Min Chen, Thomas R. Neu, David G. Weissbrodt, Mark C. M. van Loosdrecht, Yuemei Lin
Summary: The catabolism of sialic acids in a microbial community resembles that of gut microbiota, indicating the importance of sialic acids in the absence of eukaryotic hosts.
FEMS MICROBIOLOGY ECOLOGY
(2022)
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.
