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Journal of Environmental Sciences 2024年第12期146卷 272-282页

作者： Min Yang Zhen Liu aijie wang Ingmar Nopens Hairong Hu Hong Chen School of Civil and Environmental Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province Changsha 410114China BIOMATH Department of Data Analysis and Mathematical ModellingGhent UniversityGent B 9000Belgium Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Materials Science and Engineering Hunan University of Science and TechnologyXiangtan 411201China

Further treatment of secondary effluents before their discharge into the receiving water bodies could alleviate water *** this study,the Chlorella proteinosa was cultured in a membrane photobioreactor to further remove nitrogen from the secondary *** effect of hydraulic retention time(HRT)on microalgae biomass yields and nutrient removal was *** results showed that soluble algal products concentration reduced in the suspension at low HRT,thereby alleviating microalgal growth *** addition,the lower HRT reduced the nitrogen limitation for Chlorella proteinosa’s growth through the phase-out of nitrogen-related functional *** a result,the productivity for Chlorella proteinosa increased from 6.12 mg/L/day at an HRT of 24 hr to 20.18 mg/L/day at an HRT of 8 *** highest removal rates of 19.7 mg/L/day,23.8 mg/L/day,and 105.4 mg/L/day were achieved at an HRT of 8 hr for total nitrogen(TN),ammonia,and chemical oxygen demand(COD),***,in terms of removal rate,TN and COD were the largest when HRT is 24 hr,which were 74.5%and 82.6%*** maximum removal rate of ammonia nitrogen was 99.2%when HRT was 8 hr.

关键词： Chlorella MPBR Fouling HRT SAP Nutrient

Enhanced hydrogen production in microbial electrolysis through strategies of carbon recovery from alkaline/thermal treated sludge

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Frontiers of Environmental Science & Engineering 2021年第4期15卷 121-130页

作者： Ling wang Chunxue Yang Sangeetha Thangavel Zechong Guo Chuan Chen aijie wang Wenzong Liu State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin150001China Heilongjiang Cold Region Wetland Ecology and Environment Research Key Laboratory School of Geography and TourismHarbin UniversityHarbin150086China Department of Energy and Refrigerating Air-Conditioning Engineering Taipei University of TechnologyTaipei10608China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang212013China School of Civil and Environmental Engineering Harbin Institute of Technology ShenzhenShenzhen518055China

The aim of this study was to investigate the biohydrogen production from thermal(T),alkaline(A)or thermal-alkaline(TA)pretreated sludge fermentation liquid(SFL)in a microbial electrolysis cells(MECs)without buffer *** hydrogen yield of 36.87±4.36 mgH_(2)/gVSS(0.026 m^(3)/kg COD)was achieved in TA pretreated SFL separated by centrifugation,which was 5.12,2.35 and 43.25 times higher than that of individual alkaline,thermal pretreatment and raw sludge,*** SFL from sludge by centrifugation eliminated the negative effects of particulate matters,was more conducive for hydrogen production than *** accumulated short chain fatty acid(SCFAs)after pretreatments were the main substrates for MEC hydrogen *** maximum utilization ratio of acetic acid,propionic acid and n-butyric acid was 93.69%,90.72%and 91.85%,*** results revealed that pretreated WAS was highly efficient to stimulate the accumulation of *** the characteristics and cascade bioconversion of complex substrates were the main factor that determined the energy efficiency and hydrogen conversion rate of MECs.

关键词： Waste activated sludge(WAS) Short chain fatty acids(SCFAs) Hydrogen Pretreatment Microbial electrolysis cells(MECs)

Removal of nitric oxide from simulated flue gas via denitrification in a hollow-fiber membrane bioreactor

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Journal of Environmental Sciences 2013年第11期25卷 2239-2246页

作者： Xinyu Zhang Ruofei Jin Guangfei Liu Xiyang Dong Jiti Zhou aijie wang Key Laboratory of Industrial Ecology and Environmental Engineering Ministry of Education School of Environmental Science and TechnologyDalian University of Technology State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology

A hollow-fiber membrane bioreactor （HMBR） was studied for its ability to treat nitric oxide （NO） from simulated flue gas. The HMBR was operated for 9 months and showed a maximum elimination capacity of 702 mg NO/（***） with a removal efficiency of 86% （gas residence time of 30 sec, inlet NO concentration of 2680 mg/m^3, pH 8）. Varying operation parameters were tested to determine the stability and response of the HMBR. Both the inlet NO concentration and gas residence time influenced the removal of NO in the HMBR. NO elimination capacity increased with an increase in inlet NO concentration or a shortening of gas residence time. Higher removal efficiency of NO was obtained at a longer gas residence time or a lower inlet NO concentration. Microbial communities of the HMBR were sensitive to the variation in pH value and alkalescence corresponding to an optimum pH value of 8. In addition, NO elimination capacity and removal efficiency were inversely proportional to the inlet oxygen concentration. Sulfur dioxide had no great influence on elimination capacity and removal efficiency of NO. Product analysis was performed to study N20 and N2 production and confirmed that the majority of the microorganisms were denitrifying bacteria in the HMBR. Compared to other bioreactors treating NO, this study showed that the denitrifying HMBR was a good option for the removal of NO.

关键词： nitric oxide denitrification hollow-fiber membrane bioreactor biofilm

Upgrading VFAs bioproduction from waste activated sludge via co-fermentation with soy sauce residue

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Frontiers of Environmental Science & Engineering 2019年第1期13卷 53-62页

作者： Yanqing Duan Aijuan Zhou Kaili Wen Zhihong Liu Wenzong Liu aijie wang Xiuping Yue College of Environ mental Science and Engineering Taiyuan University of Technology Taiyuan 030024 China Shanxi Engineer Research Institute of Sludge Disposition and Resources Taiyuan University of Technology Taiyuan 030024 China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology (SKLUWRE HIT) Harbin 150091 China

Conditioning of extra carbon sources has been widely reported to facilitate fermentation of waste activated sludge (WAS). Soy sauce residue (SSR) was a relatively untapped carbon source for sludge conditioning. This batch study aimed to evaluate the possible implementation of SSR for volatile fatty acids (VFAs) production from WAS. To upgrade the bioavailability of feedstock, three typical pretreatment methods were conducted, i.e., ammonium hydroxide (AH), sulfuric acids (SA) and thermal assisted alkaline (TA). AH pretreated test (AH-PT) outperformed due to a relatively strong structure decomposition of cellulosic materials as revealed by infrared spectroscopic analysis and crystal index. As a result, performed a high hydrolysis rate of 4449 mg COD/d, 1.12-1.23-fold higher than that in TA and SA pretreated tests (TA-PT and SA-PT), and 7.8-fold higher than that in the Control test. Meanwhile, a volatile fatty acids (VFAs) contribution of 401.2 mg COD/g SSR L and a maximum acidification rate of 3.59 d was recorded, with a high sum proportion of mall molecular acetic and propionic 82.2%, 11%-70% increase over the other three tests. Besides, speciation process characterized with functional genus differentiation was identified by microbial diversity and distribution investigation and canonical correspondence analysis (CCA). Finally, a potential market value of 0.49-0.65 Billion €/year was preliminary estimated, showing promise of resource recovery from both WAS and SSR instead of extensive disposal.

关键词： Waste activated sludge (WAS) Soy sauce residue (SSR) Sludge conditioning Volatile fatty acids (VFAs) Microbial diversity

Microbial community structure in different wastewater treatment processes characterized by single-strand conformation polymorphism (SSCP) technique

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Frontiers of Environmental Science & Engineering 2008年第1期2卷 116-121页

作者： Yangguo ZHAO aijie wang Nanqi REN Yan ZHAO School of Municipal and Environmental Engineering Harbin Institute of TechnologyHarbin 150090China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China

In order to investigate microbial community structures in different wastewater treatment processes and understand the relationship between the structures and the status of processes,the microbial community diversity,variety and distribution in five wastewater treatment pro cesses were studied by a culture-independent genetic fingerprinting technique single-strand conformation poly-morphism(SSCP).The five processes included denitrifying and phosphate-removal system(diminished N),Chinese traditional medicine wastewater treatment system(P),beer wastewater treatment system(W),fermentative biohydrogen-producing system(H),and sulfate-reduction system(S).The results indicated that the microbial community profiles in the wastewater bioreactors with the uniform status were very *** diversity of microbial populations was correlated with the complexity of organic contaminants in *** traditional medicine wastewater contained more complex organic components;hence,the population diversity was higher than that of simple nutrient bioreactors fed with molasses *** with the strain bands in a simulated community,the relative proportion of some functional microbial populations in bioreactors was not *** biohydrogen producer Ethanoligenens harbinense in the better condition bioreactor had only a 5% band density,and the Desulfovibrio *** the sulfate-reducing bioreactor had less than 1.5%band *** SSCP profiles could identify the difference in microbial community structures in wastewater treatment processes,monitor some of the functional microbes in these processes,and consequently provide useful guidance for improving their efficiency.

关键词： wastewater treatment process microbial community structure community diversity single-strand conformation polymorphism(SSCP)

Trophic mode and organics metabolic characteristic of fungal community in swine manure composting

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Frontiers of Environmental Science & Engineering 2019年第6期13卷 137-146页

作者： Jing Peng Ke wang Xiangbo Yin Xiaoqing Yin Mengfei Du Yingzhi Gao Philip Antwi Nanqi Ren aijie wang School of Environment Harbin Institute of TechnologyHarbin 150090China Architectural Design and Research Institute of HIT Harbin Institute of TechnologyHarbin 150090China School of Resources and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou 341000China

The succession of fungal community,trophic mode and metabolic characteristics were evaluated in 60 days composting of swine manure by high-throughput sequencing,FUNGuild and Biolog method,*** result showed that the ftingal community diversity reached to the highest level(76 OTUs)in the thermophilic phase of composting,then sustained decline to 15 OTUs after *** were 10 fungal function groups in the raw swine ***-saprotroph fungi reached to 15.91%on Day-10but disappeared on *** saprotroph-undefined saprotroph fungi grown from 0.19%to 52.39%during the *** ftmgal community had more functional groups but the lower substrate degradation rates in the thermophilic *** fungal communities on Day-0 and Day-60 had the highest degradation rates of amino acids and polymers,*** analysis showed that ORP(49.6%),VS/Ash(45.3%)and moisture(39.2%)were the main influence factors on the succession of fungal community in the swine manure composting process.

关键词： Fungus FUNGuild Biolog Trophic mode Composting Oxidation reduction potential

Sediment microbial fuel cell with floating biocathode for organic removal and energy recovery

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Frontiers of Environmental Science & Engineering 2012年第4期6卷 569-574页

作者： aijie wang Haoyi CHENG Nanqi REN Dan CUI Na LIN Weimin WU State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China Department of Civil and Environmental Engineering Stanford UniversityStanfordCA 94305-4020USA

A sediment microbial fuel cell （SMFC） with three dimensional floating biocathode （FBC） was developed for the electricity generation and biodegradation of sediment organic matter in order to avoid negative effect of dissolved oxygen （DO） depletion in aqueous environments on cathode performance and search cost-effective cathode materials. The biocathode was made from graphite granules with microbial attachment to replace platinum （Pt）-coated carbon paper cathode in a laboratory-scale SMFC （3 L in volume） filled with river sediment （organic content 49±4 g. kg^-1 dry weight）. After start-up of 10 days, the maximum power density of 1.00W.m^-3 （based on anode volume） was achieved. The biocathode was better than carbon paper cathode catalyzed by Pt. The attached biofilm on cathode enhanced power generation significantly. The FBC enhanced SMFC performance further in the presence aeration. The SMFC was continuously operated for an over 120-day period. Power generation peaked within 24 days, declined gradually and stabilized at a level of 1/6 peak power output. At the end, the sediment organic matter content near the anode was removed by 29% and the total electricity generated was equal to 0.251 g of chemical oxygen demand （COD） removed.

关键词： microbial fuel cell (MFC) sediment biocathode electricity generation organic removal

Microbial-driven ectopic uranium extraction with net electrical energy production

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Frontiers of Environmental Science & Engineering 2024年第1期18卷 49-58页

作者： Xin Tang Yin Ye Chunlin wang Bingqian wang Zemin Qin Cui Li Yanlong Chen Yuheng wang Zhiling Li Miao Lv aijie wang Fan Chen School of Ecology and Environment Northwestern Polytechnical UniversityXi’an 710129China School of Materials Science and Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 611756China

The extraction of uranium (U) from U-bearing wastewater is of paramount importance for mitigating negative environmental impacts and recovering U resources. Microbial reduction of soluble hexavalent uranium (U(VI)) to insoluble tetravalent uranium (U(IV)) holds immense potential for this purpose, but its practical application has been impeded by the challenges associated with managing U-bacterial mixtures and the biotoxicity of U. To address these challenges, we present a novel spontaneous microbial electrochemical (SMEC) method that spatially decoupled the microbial oxidation reaction and the U(VI) reduction reaction. Our results demonstrated stable and efficient U extraction with net electrical energy production, which was achieved with both synthetic and real wastewater. U(VI) removal occurred via diffusion-controlled U(VI)-to-U(IV) reduction-precipitation at the cathode, and the UIVO_(2) deposited on the surface of the cathode contributed to the stability and durability of the abiotic U(VI) reduction. Metagenomic sequencing revealed the formation of efficient electroactive communities on the anodic biofilm and enrichment of the key functional genes and metabolic pathways involved in electron transfer, energy metabolism, the TCA cycle, and acetate metabolism, which indicated the ectopic reduction of U(VI) at the cathode. Our study represents a significant advancement in the cost-effective recovery of U from U(VI)-bearing wastewater and may open a new avenue for sustainable uranium extraction.

关键词： U(VI)bioreduction Electricity production Reaction decoupling Uranium-bearing wastewater Biofilm microbiome

Investigation of colloidal biogenic sulfur flocculation:Optimization using response surface analysis

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Journal of Environmental Sciences 2016年第4期28卷 227-235页

作者： Fan Chen Ye Yuan Chuan Chen Youkang Zhao Wenbo Tan Cong Huang Xijun Xu aijie wang State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of Sciences

The colloidal properties of biogenic elemental sulfur（S^0）cause solid–liquid separation problems,such as poor settling and membrane *** this study,the separation of S^0 from bulk liquids was performed using *** chloride（PAC）,polyacrylamide（PAM）and microbial flocculant（MBF）were compared to investigate their abilities to flocculate S^0 produced during the treatment of sulfate-containing wastewater.A novel approach with response surface methodology（RSM）was employed to evaluate the effects and interactions of flocculant dose,pH and stirring intensity,on the treatment efficiency in terms of the S^0 flocculation and the supernatant turbidity *** dose optimization results indicated that the S^0 flocculation efficiency decreased in the following order PAC〉MBF〉*** S^0 flocculation conditions were observed at pH 4.73,a stirring speed of 129 r/min and a flocculant dose of 2.42 mg PAC/mg *** optimum flocculation conditions,the S^0f locculation rate reached 97.53%.Confirmation experiments demonstrated that employing PAC for S^0 flocculation is feasible and RSM is an efficient approach for optimizing the process of S^0 *** results provide basic parameters and conditions for recovering sulfur during the treatment of sulfate-laden wastewaters.

关键词： Elemental sulfur Flocculation Optimization Response surface methodology (RSM)

Nonmetallic modified zero-valent iron for remediating halogenated organic compounds and heavy metals: A comprehensive review

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Environmental Science and Ecotechnology 2024年第5期21卷 34-46页

作者： Zimin Yan Jia Ouyang Bin Wu Chenchen Liu Hongcheng wang aijie wang Zhiling Li State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090PR China State Key Laboratory of Urban Water Resource and Environment School of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen518055PR China

Zero-valent iron(ZVI),an ideal reductant treating persistent pollutants,is hampered by issues like corrosion,passivation,and suboptimal *** advancements in nonmetallic modified ZVI(NM-ZVI)show promising potential in circumventing these challenges by modifying ZVI's surface and internal physicochemical *** its promise,a thorough synthesis of research advancements in this domain remains *** we review the innovative methodologies,regulatory principles,and reduction-centric mechanisms underpinning NM-ZVI's effectiveness against two prevalent persistent pollutants:halogenated organic compounds and heavy *** start by evaluating different nonmetallic modification techniques,such as liquid-phase reduction,mechanical ball milling,and pyrolysis,and their respective *** discussion progresses towards a critical analysis of current strategies and mechanisms used for NM-ZVI to enhance its reactivity,electron selectivity,and electron utilization *** is achieved by optimizing the elemental compositions,content ratios,lattice constants,hydrophobicity,and ***,we propose novel approaches for augmenting NM-ZVI's capability to address complex pollution *** review highlights NM-ZVI's potential as an alternative to remediate water environments contaminated with halogenated organic compounds or heavy metals,contributing to the broader discourse on green remediation technologies.

关键词： Nonmetallic modified zero-valent iron Halogenated organic compounds Heavy metals Reductive removal Regulation strategies Electron selectivity