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Synergistic biotechnological co-processing of wastewater and external sludge for partial energy autarky

Chemical Engineering Journal 2025年

作者： Fangzhai Zhang Hongying Lu Shouyou Gao Dan Qu Yujing Zhang Ziyi Du Jiahui Wang Yongzhen Peng National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Engineering Research Center of Beijing Beijing University of Technology Beijing 100124 China Beijing General Municipal Engineering Design & Research Institute Beijing 100082 China Beijing Key Laboratory for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University 35 Qinghua East Road Haidian District Beijing 100083 China Engineering Research Center for Water Pollution Source Control & Eco-remediation College of Environmental Science and Engineering Beijing Forestry University 35 Qinghua East Road Haidian District Beijing 100083 China

Harnessing bioenergy from waste activated sludge (WAS) is crucial for sustainable development in wastewater treatment field; however, traditional anaerobic digestion with pretreatment is energy-intensive. We developed a novel, partially energy-autonomous biotechnology that synergistically co-processes wastewater and WAS using a self-generated biocatalyst (ppm-level FNA) without any external energy or chemical input. This self-sustained FNA-centric system simultaneously enables rapid organic resource recovery, sludge disintegration, and denitrification within only 20.5 h, representing a major advancement over traditional multi-day anaerobic processes. The multifunctional process recovered 3264.7 mg/L of net organics, reduced sludge by 7.92 kg/m 3 ·d, and removed nitrogen at a rate of 0.71 kg N/m 3 ·d with 92.5 % efficiency. A 58.4 % decrease in cell membrane thickness (from 10.42 nm to 4.7 nm) and significant perforation were observed under biocatalyst treatment. Comprehensive analysis, including cell surface morphology, microorganism survival status, organic resource dynamic, and proteins spatial distribution, underscore organic resource recovery from sludge relying on multifaceted biocatalytic and stress effects. Consequently, even after biocatalyst completed consumption, organic release rate remained constant at 87.7–122 mg COD/h. Furthermore, unlike the detrimental effects on biodiversity, specific microbial communities were selectively enriched, remarkable enhancing in glycolysis, fatty acid synthesis, and denitrification functionalities. Results demonstrate feasibility of partial energy self-sufficiency, contributing to achievement of carbon neutrality in wastewater and WAS management.

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Mass Transfer-Enhanced Photothermal Membranes with Synergistic Light Utilization for High-Turbidity Wastewater Purification

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Angewandte Chemie 2024年第11期137卷

作者： Jiangchen Fu Shaoze Xiao Jiazhen Cao Zhiyan Liang Jiabin Chen Yue Jiang Prof. Mingyang Xing Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Chemistry & Molecular Engineering East China University of Science and Technology 130 Meilong Road Shanghai 200237 China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China Key Laboratory of Yangtze River Water Environment Shanghai Institute of Pollution Control and Ecological Security Tongji University Shanghai 200092 China

The photo-Fenton process faces significant limitations in treating high-turbidity, colored wastewater due to light attenuation and impurity interference (blocked mass transfer). To address these issues, we developed a suspended photothermal Fenton membrane by loading a photothermal catalyst on a hydrophobically modified cotton filter paper, enabling precise suspension 1 mm below the water surface. This design achieved 89.49 % light utilization and high chemical oxygen demand (COD) removal, even in wastewater with extreme chromaticity (10 multiples) and turbidity (703 NTU). The enhanced photothermal conversion accelerated molybdenum co-catalyzed Fenton reactions and improved peroxymonosulfate (PMS) activation, maintaining over 90 % phenol removal for 15 days. Mechanistic simulations revealed improved mass transfer of reactive oxygen species (ROS) and pollutants at the solid–liquid interface, with PMS diffusion identified as the rate-limiting step. The membrane resisted fouling from suspended solids and maintained stable operation in soil-containing solutions for 10 days. This innovative approach offers an efficient solution for degrading pollutants in dark-colored, high-turbidity wastewater, overcoming traditional process limitations.

关键词： Suspended membrane Photothermal Fenton Efficient light utilization Enhanced mass transfer High-turbidity wastewater purification

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Simultaneous Removal of NO, SO2 and Hg0 with the WDRMRS

Research Square

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Research Square 2021年

作者： Deng, Mingqiang Xiao, Zhengguo Li, Dengxin Zhu, Qiaoling Chen, Qin Wu, Sicheng College of Environmental Science and Engineering Donghua University Songjiang Campus Shanghai201620 China Shanghai Textile Research Institute Co. Ltd Shanghai200082 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Micro-nanobubbles can spontaneously generate hydroxyl free radicals (· OH). Urea is a cheap reductant and can react with NOx species, and their products are nontoxic and harmless N2, CO2 and H2O. In this study, a Wet Direct Recycling Micro-nanobubble Flue Gas Multi-pollutants Removal System (WDRMRS) was developed for the simultaneous removal of NO, SO2 and Hg0. In this system, a micro-nanobubble generator (MNBG) was used to produce a micro-nanobubble gas-liquid dispersion system (MNBGLS) through recycling the urea solution from the reactor and the simulated flue gas composed of N2, NO, SO2 and Hg0. The MNBGLS, which has a large gas-liquid dispersion interface, was recycled continuously from the MNBG to the reactor, thus achieving cyclic absorption of various pollutants. All of the investigated parameters, including the initial pH and temperature of the absorbent as well as the concentrations of urea, NO and SO2 had significant effects on the NO removal efficiency but did not significantly affect the SO2 removal efficiency, whereas only the initial solution pH and NO concentration affected the Hg0 removal efficiency. The analysis results of the reaction mechanism showed that · OH played a critical role in the removal of various pollutants. After the treatment by this system, the main removal products were HgO sediment, SO42− and NH4+ which could be easily recycled. © 2021, CC BY.

关键词： Urea

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Corrigendum to "Using Fe biofortification strategies to reduce both Ni concentration and oral bioavailability for rice with high Ni" [J Hazard Mater 452 (2023) 131367]

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Journal of hazardous materials 2023年 459卷 132027页

作者： Xin-Ying Lin Jia-Hui Liang Duo-Duo Jiao Jun-Xiu Chen Ning Wang Lena Q Ma Dongmei Zhou Hong-Bo Li State Key Laboratory of Pollution Control and Resource Reuse Jiangsu Key Laboratory of Vehicle Emissions Control School of the Environment Nanjing University Nanjing 210023 China. College of Resources and Environmental Sciences Fujian Agriculture and Forestry University Fuzhou 350002 Fujian China. Key Laboratory of Agro-Environment in Downstream of Yangtze Plain Ministry of Agriculture and Rural Affairs of the People's Republic of China Jiangsu Academy of Agricultural Sciences Nanjing 210014 Jiangsu China. Institute of Soil and Water Resources and Environmental Science College of Environmental and Resource Sciences Zhejiang University Hangzhou 310058 China. State Key Laboratory of Pollution Control and Resource Reuse Jiangsu Key Laboratory of Vehicle Emissions Control School of the Environment Nanjing University Nanjing 210023 China. Electronic address: hongboli@***.

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Efficient Treatment of the Starch Wastewater by Enhanced Flocculation–Coagulation of Environmentally Benign Materials

SSRN

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SSRN 2022年

作者： Zhang, Yalan Li, Meng Zhang, Guihai Liu, Wei Xu, Jinying Tian, Yuansong Wang, Yinfeng Xie, Xingyue Peng, Zhiqi Li, Aimin Zhang, Ru Wu, Daishe Xie, Xianchuan Key Laboratory of Poyang Lake Environment and Resource Utilization Ministry of Education School of Resource and Environment Nanchang University Nanchang330031 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Wireline Product Operation ZTE Corporation Nanjing210023 China Nanjing University Yancheng Academy of Environment Protection Technology and Engineering Nanjing210023 China Jiangxi Nanxin Environmental Protection Technology Co. LTD Jiangxi Jiujiang330300 China School of Materials and Chemical Engineering Pingxiang University Pingxiang337000 China

The high concentration, complexity and difficulty rationality of organic pollutants in actual starch wastewater are becoming major obstacles to realizing efficient water purification. Herein, bentonite was selected from four kinds of clay minerals (i.e. kaolin, zeolite, attapulgite and bentonite) as coagulant aids, and chitosan-modified bentonite combined with polyglutamic acid was used for enhanced coagulation treatment for starch wastewater. Among them, bentonite can adsorb soluble pollutants in starch wastewater, chitosan modification can enhance the coagulation effect, and the flocculant of polyglutamic acid is conducive to the removal of particulate matter through bridging effects. The combination of the three can effectively and deeply remove pollutants in starch wastewater. Under the optimal conditions, the removal rates of chemical oxygen demand, total nitrogen, total phosphorus and turbidity can reach 86.2%, 80.3%, 52.3% and 98.2%, respectively, which are far higher than that of the vast majority of coagulants currently reported. Density functional theory calculation was carried out to reveal the mechanisms for the enhanced coagulation-flocculation system and and explained the adsorption and coagulation mechanism, respectively. The electrostatic potential around aluminum in bentonite of 14.248 *** -1 is more conducive to the adsorption of negatively charged organic pollutants, and that bentonite has lower adsorption energy (-1.43 eV) than chitosan and polyglutamic acid. © 2022, The Authors. All rights reserved.

关键词： Flocculation

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Comparative study on the removal of 1- naphthol and 2-naphthol by ferrate (VI): Kinetics, reaction mechanisms and theoretical calculations

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Chemosphere 2023年第1期336卷 139189页

作者： Qi, Yumeng Yu, Yao Allam, Ahmed A. Ajarem, Jamaan S. Altoom, Naif G. Dar, Afzal Ahmed Tang, Xiaosheng Wang, Zunyao Qu, Ruijuan State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China Department of Zoology Faculty of Science Beni-suef University Beni-suef65211 Egypt Department of Zoology College of Science King Saud University P.O. Box 2455 Riyadh11451 Saudi Arabia Department of Physics Polytechnique Montreal C.P. 6079 Succ Centre-ville MontrealQC H3C 3A7 Canada Jiangsu Yangtze River Delta Environmental Science and Technology Research Institute Co. Ltd. Jiangsu Changzhou213100 China

In this study, the oxidation of 1-naphthol (1-NAP) and 2-naphthol (2-NAP) by Fe(VI) was investigated. The impacts of operating factors were investigated through a series of kinetic experiments, including Fe(VI) dosages, pH and coexisting ions (Ca2+, Mg2+, Cu2+, Fe3+, Cl−, SO42−, NO3− and CO32−). Almost 100% elimination of both 1-NAP and 2-NAP could be achieved within 300 s at pH 9.0 and 25 °C. Cu2+ could significantly improve the degradation efficiency of 1-NAP and 2-NAP, but the impacts of other ions were negligible. The liquid chromatography-mass spectrometry was used to identify the transformation products of 1-NAP and 2-NAP in Fe(VI) system, and the degradation pathways were proposed accordingly. Electron transfer mediated polymerization reaction was the dominant transformation pathway in the elimination of NAP by Fe(VI) oxidation. After 300 s of oxidation, heptamers and hexamers were found as the final coupling products during the removal of 1-NAP and 2-NAP, respectively. Theoretical calculations demonstrated that the hydrogen abstraction and electron transfer reaction would easily occur at the hydroxyl groups of 1-NAP and 2-NAP, producing NAP phenoxy radicals for subsequent coupling reaction. Moreover, since the electron transfer reactions between Fe(VI) and NAP molecules were barrierless and could occur spontaneously, the theoretical calculation results also confirmed the priority of coupling reaction in Fe(VI) system. This work indicated that the Fe(VI) oxidation was an effective way for removing naphthol, which may help us understand the reaction mechanism between phenolic compounds with Fe(VI). © 2023 Elsevier Ltd

关键词： Oxidation

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Quantification of microbial community contributions to phosphorus speciation transformation in plateau lake sediments: Evidence from phosphate oxygen isotope fractionation and 16S rRNA gene sequencing

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Environmental Technology and Innovation 2025年 39卷

作者： Sang, Yiwen Wang, Ziteng Sun, Fuhong Mao, Aoping Chen, Xiuyuan Chang, Hong Guo, Yiding State Key Laboratory of Environment Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Sciences & Engineering Beijing Forestry University Beijing100083 China College of Ecology and Nature Conservation Beijing Forestry University Beijing100083 China

Understanding multiform phosphorus (P) biogeochemical cycling processes is crucial for mitigating eutrophication in aquatic environments. However, research on quantifying the contributions of different microbial genera to P migration and transformation is insufficient. This study aimed to investigate microbe-mediated P cycling processes in the sediments of a typical eutrophic lake, Dianchi, China, using 16S rRNA gene sequencing and phosphate oxygen isotope techniques. The results showed that phyla Proteobacteria, Acidobacteria, Firmicutes, and Chloroflexi were the key microbial communities influencing P cycling processes in the sediments. Phosphate oxygen isotope analysis revealed the potential proportions of external P inputs, with livestock farming (46.3 %) and P mining (30.1 %) identified as the largest contributors. Random forest analysis, used to characterize microbe-mediated fractionation processes of different P forms, revealed that microorganisms most strongly influenced H2O-P and NaHCO3-P, followed by NaOH-P. In contrast, their impact on the more stable HCl-P was minimal. Structural equation modeling was used to quantitatively determine the weight order of key microbial taxa as Actinobacteria > Proteobacteria > Acidobacteria > Ignavibacteriae. Notably, environmental factors (chemical oxygen demand, total nitrogen, and dissolved oxygen) may modulate microbial community composition and metabolism, thereby indirectly regulating P cycling. A significant correlation between most environmental factors and NaHCO3-P was observed. For example, total nitrogen contributed 14 % in NaHCO3-P compared with 1 % in NaOH-P. This study highlights the complex interactions between microbial communities and P cycling in natural environments, providing novel insights into the microbial mechanisms of P cycling and offering a theoretical basis for managing ecological restoration in eutrophic lakes. © 2025

关键词： Eutrophication

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Study on the Wet Oxidation of an Industrial High Concentration Caprolactam Organic Wastewater

Study on the Wet Oxidation of an Industrial High Concentrati...

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2019 International Conference on Oil and Gas Engineering and Geological Sciences, OGEGS 2019

作者： Guo, Pengfei Wang, Li Zeng, Xu Yao, Guodong Zhou, Yangyuan Zhao, Jianfu College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resources Reuse Tongji University Shanghai China Shanghai Institute of Measurement and Testing Technology Shanghai China

In this study, wet oxidation of an industrial high concentration caprolactam organic wastewater using oxygen gas as an oxidant was investigated. Different experiments were conducted to discuss the effects of the reaction temperature, time, the initial oxygen pressure and dilution ration of raw wastewater, using a batch reactor with COD removal rate as a standard for assessing. Results show that the highest removal rate of COD, 76.6%, was obtained at 250 °C for 30 min with the oxygen pressure 1.7 MPa and dilution ration 10. The biodegradability of the wastewater improved greatly after the wet oxidation process. These results illustrated that wet oxidation with oxygen gas as an oxidant displayed effectively for the pretreatment of high concentration caprolactam organic wastewater. © 2019 IOP Publishing Ltd.

关键词： Oxidants

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Declining short-term emission control opportunity for major events in Chinese cities

Nature Cities

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Nature Cities 2025年 1-13页

作者： Hanying Wang Yu Zhao Qin He Kai Qin Hao Kong Jintai Lin Bo Zheng State Key Laboratory of Pollution Control and Resource Reuse and School of Environment Nanjing University Nanjing China Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET) Nanjing University of Information Science and Technology Nanjing China School of Environment and Spatial Informatics China University of Mining and Technology Xuzhou China Laboratory for Climate and Ocean-Atmosphere Studies Department of Atmospheric and Oceanic Sciences School of Physics Peking University Beijing China Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Institute of Environment and Ecology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing China

In China, short-term emission controls have been implemented widely in the host and nearby cities of major events to reduce air pollution. However, insufficient analysis of their effectiveness has weakened the design of pollution controls. In this study, we analyzed the impact of short-term controls on nitrogen oxide emissions and quantified their main drivers in both the host and neighboring cities of 11 events held in east China from 2010 to 2023. We found that short-term controls might be more effective in neighboring cities than in host cities for some events, and that their benefits in terms of reduced emissions have weakened over time. Furthermore, the main sector of emission abatement for events has shifted from power to industry and transportation, reflecting the evolution of emission controls and the relative dominance of air-pollution budgets for different sectors. Our analysis highlights the enhanced targeting of short-term air pollution controls for Chinese cities, which also supports the long-term policy design.

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Ultra-Selective Polyamide Membrane from Metal Organic Framework Assembly Regulated Interfacial Polymerization for Desalination and Water reuse

Research Square

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Research Square 2021年

作者： Wen, Yue Dai, Ruobin Li, Xuesong Zhang, Xingran Cao, Xingzhong Wu, Zhichao Lin, Shihong Tang, Chuyang Y. Wang, Zhiwei State Key Laboratory of Pollution Control and Resource Reuse Shanghai Institute of Pollution Control and Ecological Security School of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai200092 China Institute of High Energy Physics CAS Beijing100049 China Department of Civil and Environmental Engineering Vanderbilt University NashvilleTN37235-1831 United States Department of Civil Engineering The University of Hong Kong Pokfulam Road Hong Kong

While reverse osmosis (RO) is the leading technology to address the challenge of water scarcity through desalination and potable reuse of wastewater, current RO membranes still fall short in rejecting certain harmful constituents from seawater (e.g., boron) and wastewater (e.g., N-nitrosodimethylamine, or NDMA). In this study, we develop an ultra-selective polyamide (PA) membrane via enhancing interfacial polymerization using amphiphilic metal-organic framework (MOF) nanoflakes. In this process, MOF nanoflakes horizontally aligned at the water/hexane interface to accelerate the transport of diamine monomers across the interface and conserve gas bubbles and heat of reaction near the interface. These mechanisms synergistically led to the formation of a crumpled PA nanofilm with an ultrathin intrinsic thickness of ~5 nm and a high cross-linking degree of ~97%. The resulting PA membrane delivered excellent desalination performance that is beyond the existing upper-bound of perm-selectivity, and exhibited very high rejection (>90%) of boron and NDMA unmatched by state-of-the-art RO membranes. © 2021, CC BY.

关键词： Desalination

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