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An advanced anaerobic biofilter with effluent recirculation for phenol removal and methane production in treatment of coal gasification wastewater

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Journal of Environmental Sciences 2016年第9期28卷 23-33页

作者： Yajie Li Salma Tabassum zhenjia zhang School of Environmental Science and Engineering Shanghai Jiao Tong University LCM-Laboratory of Catalysis and Materials Associate Laboratory LSRE-LCMDepartamento de Engenharia QuímicaFaculdade de EngenhariaUniversidade do Porto

An advanced anaerobic biofilter（AF） was introduced for the treatment of coal gasification wastewater（CGW）,and effluent recirculation was adopted to enhance phenol removal and methane *** results indicated that AF was reliable in treating diluted CGW,while its efficiency and stability were seriously reduced when directly treating raw ***,its performance could be greatly enhanced by effluent *** optimal effluent recirculation of 0.5 to the influent,concentrations of chemical oxygen demand（COD） and total phenol in the effluent could reach as low as 234.0 and 14.2 mg/L,***,the rate of methane production reached 169.0 m L CH_4/L/*** CGW seemed to restrain the growth of anaerobic microorganisms,especially methanogens,the inhibition was temporary and reversible,and anaerobic bacteria presented strong *** activities of methanogens cultivated in CGW could quickly recover on feeding with glucose wastewater（GW）.However,the adaptability of anaerobic bacteria to the CGW was very poor and the activity of methanogens could not be improved by long-term *** analysis using the Haldane model,it was further confirmed that high effluent recirculation could result in high activity for hydrolytic bacteria and substrate affinity for toxic matters,but only suitable effluent recirculation could result in high methanogenic activity.

关键词： Coal gasification wastewater Effluent recirculation Methane production Anaerobic biofilters

Inhibitory effect of high phenol concentration in treating coal gasification wastewater in anaerobic biofilter

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Journal of Environmental Sciences 2018年第2期30卷 207-215页

作者： Yajie Li Salma Tabassum Chunfeng Chu zhenjia zhang School of Environmental Science and Engineering Suzhou University of Science and Technology School of Environmental Science and Engineering Shanghai Jiao Tong University

In this paper, the inhibition of methanogens by phenol in coal gasification wastewater（CGW）was investigated by both anaerobic toxicity tests and a lab-scale anaerobic biofilter reactor（AF）. The anaerobic toxicity tests indicated that keeping the phenol concentration in the influent under 280 mg/L could maintain the methanogenic activity. In the AF treating CGW,the result showed that adding glucose solution as co-substrate could be beneficial for the quick start-up of the reactor. The effluent chemical oxygen demand（COD） and total phenol reached1200 and 100 mg/L, respectively, and the methane production rate was 175 m L CH4/g COD/***, if the concentration of phenol was increased, the inhibition of anaerobic micro-organisms was irreversible. The threshold of total phenol for AF operation was 200–250 mg/L. The extracellular polymeric substances（EPS） and particle size distribution of anaerobic granular sludge in the different stages were also examined, and the results indicated that the influence of toxicity in the system was more serious than its effect on flocculation of EPS. Moreover, the proportion of small size anaerobic granular sludge gradually increased from10.2% to 34.6%. The results of high through-put sequencing indicated that the abundance of the Chloroflexi and Planctomycetes was inhibited by the toxicity of the CGW, and some shifts in the microbial community were observed at different stages.

关键词： Inhibition Phenol Co-digestion Anaerobic biofilters Coal gasification wastewater

Characteristics of pellets with immobilized activated sludge and its performance in increasing nitrification in sequencing batch reactors at low temperatures

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Journal of Environmental Sciences 2016年第4期28卷 202-209页

作者： Wenjie Dong Guang Lu Li Yan zhenjia zhang Yalei zhang College of Environmental Science and Engineering Tongji University Shanghai 200092 China Wenzhou Housing and Urban-Rural Development Committee Wenzhou 325000 China Wenzhou Public Utilities Investment Group Co. Ltd. Wenzhou 325000 China Environmental Science and Engineering Shanghai Jiaotong University Shanghai 200240 China

Immobilized pellets obtained by means of entrapping activated sludge in waterborne polyurethane were successfully adapted in ammonium（NH4^＋–N）synthetic *** physicochemical characteristics were determined using scanning electron microscope,pyrosequencing,and microelectrodes,and its influence on the nitrification process in sequencing batch reactors（SBRs）at low temperatures was evaluated.A large number of rod-shaped bacteria were observed on the surface of the immobilized pellet,in which Rudaea spp.（Xanthomonadaceae family）was an important bacterial component（23.44% of the total bacteria）.The oxygen uptake rate of immobilized pellets reached 240.83±15.59 mg O2/（L·hr）,and the oxygen was primarily consumed by the bacteria on the pellet surfaces（0–600μm）.The dosing of the pellets（30 m L/L）into an SBR significantly improved the nitrification efficiency at low temperatures of 7–11℃,achieving an average NH4^＋–N removal of 84.09%,which is higher than the removal of 67.46% observed for the control group.

关键词： Immobilization Acclimation Nitrification Low temperatures Sequencing batch reactor (SBR)

Nitrification performance of nitrifying bacteria immobilized in waterborne polyurethane at low ammonia nitrogen concentrations

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Journal of Environmental Sciences 2011年第3期23卷 366-371页

作者： Yamei Dong zhenjia zhang Yongwei Jin Zhirong Li Jian Lu School of Environmental Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta GA 30332 USA

Suspended and waterborne polyurethane immobilized nitrifying bacteria have been adopted for evaluating the effects of environmental changes, such as temperature, dissolved oxygen （DO） concentration and pH, on nitrification characteristics under conditions of low ammonia concentrations. The results showed that nitrification was prone to complete with increasing pH, DO and temperature. Sensitivity analysis demonstrated the effects of temperature and pH on nitrification feature of suspended bacteria were slightly greater than those of immobilized nitrifying bacteria. Immobilized cells could achieve complete nitrification at low ammonia concentrations when DO was sufficient. Continuous experiments were carried out to discuss the removal of ammonia nitrogen from synthetic micropollute source water with the ammonia concentration of about 1mg/L using immobilized nitrifying bacteria pellets in an up-flow inner circulation reactor under different hydraulic retention times （HRT）. The continuous removal rate remains above 80% even under HRT 30 min. The results verified that the waterborne polyurethane immobilized nitrifying bacteria pellets had great potential applications for micro-pollution source water treatment.

关键词： nitrification characteristics waterborne polyurethane immobilized nitrifying bacteria low ammonia concentrations micro-polluted source water

Startup and operation of anaerobic EGSB reactor treating palm oil mill effluent

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Journal of Environmental Sciences 2008年第6期20卷 658-663页

作者： zhang Yejian YAN Li CHI Lina LONG Xiuhua MEI Zhijian zhang zhenjia School of Environmental Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China College of Life and Environmental Science Wenzhou University Wenzhou 325000 China

A bench-scale expanded granular sludge bed （EGSB） reactor was applied to the treatment of palm oil mill effluent （POME）. The reactor had been operated continuously at 35℃ for 514 d, with organic loading rate （OLR） increased from 1.45 to 17.5 kg COD/（m^3·d）. The results showed that the EGSB reactor had good performance in terms of COD removal on the one hand, high COD removal of 91% was obtained at two days＇ of hydraulic retention time （HRT）, and the highest OLR of 17.5 kg COD/（m^3·d）. On the other hand, only 46% COD in raw POME was transformed into biogas in which the methane content was about 70% （V/V）. A 30-d intermittent experiment indicated that the maximum transformation potential of organic matter in raw POME into methane was 56%. Volatile fatty acid （VFA） accumulation was observed in the later operation stage, and this was settled by supplementing trace metal elements. On the whole, the system exhibited good stability in terms of acidity and alkalinity. Finally, the operational problems inherent in the laboratory scale experiment and the corresponding countermeasures were also discussed.

关键词： palm oil mill effluent mesophilic anaerobic digestion expanded granular sludge bed (EGSB)

Integration of biological method and membrane technology in treating palm oil mill effluent

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Journal of Environmental Sciences 2008年第5期20卷 558-564页

作者： zhang Yejian YAN Li QIAO Xiangli CHI Lina NIU Xiangjun MEI Zhijian zhang zhenjia School of Environmental Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China College of Life and Environmental Science Wenzhou University Wenzhou 325000 China

Palm oil industry is the most important agro-industry in Malaysia, but its by-product-palm oil mill effluent （POME）, posed a great threat to water environment. In the past decades, several treatment and disposal methods have been proposed and investigated to solve this problem. A two-stage pilot-scale plant was designed and constructed for POME treatment. Anaerobic digestion and aerobic biodegradation constituted the first biological stage, while ultrafiltration （UF） and reverse osmosis （RO） membrane units were combined as the second membrane separation stage. In the anaerobic expanded granular sludge bed （EGSB） reactor, about 43% organic matter in POME was converted into biogas, and COD reduction efficiency reached 93% and 22% in EGSB and the following aerobic reactor, respectively. With the treatment in the first biological stage, suspended solids and oil also decreased to a low degree. All these alleviated the membrane fouling and prolonged the membrane life. In the membrane process unit, almost all the suspended solids were captured by UF membranes, while RO membrane excluded most of the dissolved solids or inorganic salts from RO permeate. After the whole treatment processes, organic matter in POME expressed by BOD and COD was removed almost thoroughly. Suspended solids and color were not detectable in RO permeate any more, and mineral elements only existed in trace amount （except for K and Na）. The high-quality effluent was crystal clear and could be used as the boiler feed water.

关键词： palm oil mill effluent expanded granular sludge bed (EGSB) membrane technology ultrafiltration (UF) reverse osmosis (RO)

Autotrophic denitrification for nitrate and nitrite removal using sulfur-limestone

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Journal of Environmental Sciences 2011年第11期23卷 1761-1769页

作者： Weili Zhou Yejue Sun Bingtao Wu Yue zhang Min Huang Toshiaki Miyanaga zhenjia zhang School of Environmental Science and Engineering Shanghai Jiaotong UniversityNo.800Dongchuan RoadMinhang DistrictShanghai 200240China. Nippon Steel Chemical Co. Ltd. 14-1 Sotokanda 4 Chome Chiyoda-Ku Tokyo 101-0021 Japan

Sulfur-limestone was used in the autotrophic denitrification process to remove the nitrate and nitrite in a lab scale upflow *** water with four levels of nitrate and nitrite concentrations of 10,40,70 and 100 mg N/L was *** treating the low concentration of nitrate-or nitrite-contaminated water（10,40 mg N/L）,a high removal rate of about 90% was achieved at the hydraulic retention time（HRT） of 3 hr and temperature of 20-25°*** the same HRT,50% of the nitrate or nitrite could be removed even at the low temperature of 5-10°*** the higher concentration nitrate and nitrite（70,100 mg N/L）,longer HRT was *** batch test indicated that influent concentration,HRT and temperature are important factors afiecting the denitrification *** analysis implied that nitrate and nitrite were denitrified into nitrogen by the same *** sequential two-step-reactions from nitrate to nitrite and from nitrite to the next-step product might have taken place in the same cell during the autotrophic denitrification process.

关键词： nitrate nitrite autotrophic denitrification sulfur-limestone denitrifying bacteria

Nitrification characteristics of nitrobacteria immobilized in waterborne polyurethane in wastewater of corn-based ethanol fuel production

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Journal of Environmental Sciences 2012年第6期24卷 999-1005页

作者： Yamei Dong zhenjia zhang Yongwei Jin Jian Lut Xuehang Cheng Jun Li Yan-yan Deng Ya-nan Feng Dongning Chen School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China National Engineering Research Center for Nanotechnology Shanghai 200241China Indian River Research and Education Center University of FloridaFort PierceFL 34945USA Division of Environmental Science and Engineering Yamaguchi UniversityTokiwadai 2-16-1Yamaguchi 755-8611Japan School of Municipal and Environmental Engineering Shengyang Jianzhu UniversityShenyang 110168China

A technology to achieve stable and high ammonia nitrogen removal rates for corn distillery wastewater （ethanol fuel production） treatment has been *** characteristics of nitrifying bacteria entrapped in a waterborne polyurethane （WPU） gel carrier were evaluated after *** the acclimation period,nitrification rates of WPU-immobilized nitrobacteria were monitored and polymerase chain reaction （PCR） was also carried out to investigate the change in ammonium-oxidizing *** results showed that the pellet nitrification rates increased from 21 to 228 mg-N/（L-pellet·hr） and the quantity of the ammonia oxidation bacteria increased substantially during the acclimation.A continuous ammonia removal experiment with the anaerobic pond effluent of a distillery wastewater system was conducted with immobilized nitrifying bacteria for 30 days using an 80 L airlift reactor with pellets at a fill ratio of 15% （V/V）.Under the conditions of 75 mg/L influent ammonia,hydraulic retention time （HRT） of 3.7-5.6 hr,and dissolved oxygen （DO） of 4 mg/L,the effluent ammonia concentration was lower than 10 mg/L and the ammonia removal efficiency was 90%.While the highest ammonia removal rate,162 mg-N/（L-pellet·hr）,was observed when the HRT was 1.3 hr.

关键词： immobilized nitrobacteria corn distillery wastewater ethanol fuel production nitrification rate waterborne polyurethane gel

Three anti-inflammatory polysaccharides from Lonicera japonica Thunb.:insights into the structure-function relationships

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Food Science and Human Wellness 2024年第4期13卷 2197-2207页

作者： Yu Liu Hongjing Dong Dongxiao Sun-Waterhouse Wenwen Li Bin zhang Jinqian Yu Zhichang Qiu zhenjia Zheng Key Laboratory of Food Nutrition and Health in Universities of Shandong College of Food Science and EngineeringShandong Agricultural UniversityTai’an 271018China Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province Shandong Analysis and Test CenterQilu University of Technology(Shandong Academy of Sciences)Jinan 250014China School of Chemical Sciences The University of AucklandPrivate Bag 92019New Zealand

This study demonstrates the feasibility of producing three polysaccharides(neutral LJP-1,acidic LJP-2 and acidic LJP-3)with significant in vitro and in vivo anti-inflammatory activities from the flowers of Lonicera *** three polysaccharides differed in chemical composition,molecular weight(Mw)distribution,glycosidic linkage pattern,functional groups and *** exhibited excellent protective effects(in a dose-dependent manner)in lipopolysaccharide-injured RAW264.7 macrophages and Cu SO4-damaged zebrafish via reducing NO production and inhibiting the overexpressions of inflammation-related transcription factors,inflammatory proteins and cytokines in the NF-κB/MAPK signaling *** antiinflammatory effects varied owing to their different molecular characteristics and chemical ***,LJP-2 at 400μg/m L was the most ***-2 consisted mainly of→5)-α-L-Araf(1→,→4)-α-LGalp A(1→and→2)-α-L-Rhap(1→residues with terminal T-β-***,honeysuckle flowers are good sources of anti-inflammatory polysaccharides,and precise fractionation enables the production of potent antiinflammatory agents for the development of functional foods and healthcare products.

关键词： Honeysuckle polysaccharides Fractionation Molecular characteristics Anti-inflammatory properties Structure-function relationship