张捍民
污水深度处理与回用技术研究;高效生化反应器的开发与产业化应用;微污染原水净化技术研究;水及大气污染预防、污染控制、污染修复和污染治理等。
个性化签名
- 姓名:张捍民
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
环境科学技术
- 研究兴趣:污水深度处理与回用技术研究;高效生化反应器的开发与产业化应用;微污染原水净化技术研究;水及大气污染预防、污染控制、污染修复和污染治理等。
张捍民
工作经历:1992. 9-1996.7: 哈尔滨建筑大学市政与环境工程学院,给水排水专业,工学学士;1996. 9-2001.7: 哈尔滨工业大学市政与环境工程学院,环境工程专业,硕博连读,工学博士;2001.7-2004.12: 大连理工大学环境与生命学院,讲师;2003.7-2007.7: 大连理工大学环境与生命学院,研究生导师;2005.1-至今: 大连理工大学环境与生命学院,副教授;2006.8-至今: 大连理工大学环境与生命学院环境科学与工程系,副主任;2007.7-至今: 大连理工大学环境与生命学院,博士生导师。
研究领域(研究课题) : 1. 2007年教育部新世纪优秀人才支持计划入选者: 微球自组装成膜过程控制机制及延缓膜污染效能研究, 负责;2.国家自然科学基金“膜生物反应器膜污染机制分形解析及优化控制研究”, 负责;3.国家自然科学基金“膜生物反应器膜污染因子识别与控制研究”, 负责;4.中国博士后科学基金“聚乙烯醇动态膜延缓膜生物反应器膜污染的机理及应用研究”, 负责;5.辽宁省科学技术基金“预涂动态膜—生物反应器的应用基础研究”, 负责;6.大连市科技计划项目“预涂动态膜-生物反应器工艺研究及应用开发”, 负责;7.大连理工大学青年教师培养基金“耦合除磷脱氮的膜生物反应器水处理工艺研究及应用开发”, 负责;8.大连理工大学教材建设出版基金“给排水管网与泵站”, 负责;9.国家高技术研究发展计划(863计划)课题 “大连城市水环境质量改善技术与综合示范”,第一子课题组组长;10.国家高技术研究发展计划(863计划)课题“水污染控制技术与治理工程总体集成与发展战略”, 第3参加人。
研究方向:污水深度处理与回用技术研究;高效生化反应器的开发与产业化应用;微污染原水净化技术研究;水及大气污染预防、污染控制、污染修复和污染治理等。
科研成果及所受奖励:1.教育部高等学校科技进步一等奖“城市污水循环利用模式与实践”,2007年,第4参加人;2.入选2007年教育部新世纪人才支持计划;3.入选2007年辽宁省“百千万人才工程”千人层次;4.2006年度工作量考核优秀;5.2006年度教学质量优良奖;6.2007年度教学质量优良奖。
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1947
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成果阅读
887
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成果数
20
张捍民, Han-Min Zhang*, Jing-Ni Xiao, Ying-Jun Cheng, Li-Fen Liu, Xing-Wen Zhang, Feng-Lin Yang
Process Biochemistry 41(2006)87-95,-0001,():
-1年11月30日
An operation of a membrane bioreactor in sequencing batch mode named a sequencing batch membrane bioreactor (SBMBR) was investigated for enhancing nitrogen and phosphorus removal. Its performance was compared with a conventional membrane bioreactor (CMBR) at various influent COD/TN ratios of 3.4-28.2. The operational parameters were optimized to increase the treatment efficiency. COD removal averaged at 94.9 and 97.7%, respectively, for SBMBR and CMBR during the 8 months experimental period. The SBMBR system demonstrated good performance on nitrogen and phosphorus removal at different COD/TN ratios. When COD/TN was 6.3 and the total nitrogen (TN) load was 0.22kg/(m3 days), the TN and ammonium nitrogen removals of the SBMBR were maintained over 65 and 90%, respectively. Total phosphorus (TP) removal of the SBMBR was approximately 90% during most of the experimental time. In comparison, the CMBR did not perform so well. Its effluent TN concentration was close to that in the influent at COD/TN=6.3 and TP removal was not stable. The specific nitrification rate test showed that pH value affected the activity of nitrifiers but no irreversible harm was induced. Furthermore, the sequencing batch mode operation of MBR retarded membrane fouling according to the monitoring of trans-membrane pressure (TMP).
Sequencing batch membrane bioreactor (, SBMBR), , Conventional membrane bioreactor (, CMBR), , Nitrogen and phosphorus removal, Membrane fouling, Specific nitrification rate
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【期刊论文】Characterization of Cake Layer in Submerged Membrane Bioreactor
张捍民, FAN GANG MENG, HAN MIN ZHANG*, FENG LIN YANG, AND LIFEN LIU
Environ. Sci. Technol. 2007, 41, 4065-4070,-0001,():
-1年11月30日
Cake layer formation on the membrane surface has been a major challenge in the operation of membrane bioreactors (MBRs). In this study, the cake layer formation mechanism in an MBR used for synthetic wastewater treatment was investigated. The major components of cake layer were systematically examined by particle size analyzer (PSA), scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), X-ray fluorescence (XRF), energydiffusive X-ray analyzer (EDX), and Fourier transform infrared (FTIR) spectroscopy. The results indicate that the small particles in sludge suspension had a strong deposit tendency on the membrane surface. The SEM and CLSM analysis exhibited that bacterial clusters and polysaccharides were significant contributors to membrane fouling. The main components of biopolymers were identified as proteins and polysaccharide materials by the FTIR. The examination by EDX and XRF demonstrated that Mg, Al, Ca, Si, and Fe were the major inorganic elements in fouling cake. Furthermore, the results suggest that bridging between deposited biopolymers and inorganic compounds could enhance the compactness of fouling layer. During the operation of MBRs, the biopolymers and inorganic elements in the bioreactor should be controlled to minimize membrane fouling.
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张捍民, X.H. Wang, H.M. Zhang∗, F.L. Yang, L.P. Xia, M.M. Gao
Enzyme and Microbial Technology 41(2007)205-211,-0001,():
-1年11月30日
This study is to evaluate the utility of a strategy of stepwise increased selection pressure for cultivating aerobic granules. Three sequencing batch reactors (SBR; R1-R3) were used. Substrate ammonium-nitrogen (NH4+-N) concentration was a microbial selection pressure for selecting nitrifying bacteria. It was stepwise increased from 50 to 200mg l−1 in R2 and fixed at 50mg l−1 in R1 and 200mg l−1 in R3. Results showed that aerobic granules failed to be developed in R3 due to free ammonia (FA) inhibition, while they formed quickly in both R1 and R2. Filamentous dominated granules in R1 exhibited poor performance and started to disintegrate from day 131. Stepwise increased selection pressure in R2 selected slow-growing nitrifying bacteria gradually, and this suppressed filamentous growth and improved the stability of aerobic granules. During the 283 days operation, R2 produced aerobic granules with incrementally higher biomass concentration, better settleability, and larger granule size. Larger granules further favored denitrification and the optimal granule size is suggested to be controlled within 2-3mm. This study demonstrates the successful application of the strategy of stepwise increased selection pressure for avoiding the failure of aerobic granulation and improving the stability and performance of aerobic granules.
Aerobic granules, Selection pressure, Stability, Free ammonia, SBR, Denitrification
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张捍民, F.G. Meng∗, H.M. Zhang, Y.S. Li, X.W. Zhang, F.L. Yang, J.N. Xiao
Separation and Purification Technology 44(2005)250-257,-0001,():
-1年11月30日
Membrane bioreactor (MBR) is an important solid–liquid separation technology employed widely in the wastewater treatment. However, membrane permeability decline rapidly due to membrane fouling, which limited the application of MBR. In order to obtain understanding of the complex membrane fouling mechanisms, analysis of the effect of the microstructure on the cake permeability is necessary. In this regard, study of the distribution and porosity of the cake is very necessary. The pore distribution is strongly influenced by cake compressibility but information on how to describe this effect is very limited. In this paper, fractal theory was used to gain knowledge of cake icrostructure and its correlation to macroscopic cake properties. Scanning electron microscopy (SEM) and image analysis were utilized to estimate pore size and pore size distributions. The two-dimensional fractal dimension was determined. The results show that the cake layer had a good fractal characteristic, and the fractal dimension (Ds) was linearly correlated with porosity (R2=0.929). The fractal dimension had some relation with cake resistance and cake specific resistance. It indicates that fractal dimension provides an approach for quantification of cake structure and cake permeability.
Membrane bioreactor, Membrane fouling, Cake layer structure, Cake permeability, Fractal theory
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【期刊论文】Application of fractal permeation model to investigate membrane fouling in membrane bioreactor
张捍民, Fangang Meng, Hanmin Zhang∗, Yansong Li, Xingwen Zhang, Fenglin Yang
Journal of Membrane Science 262(2005)107-116,-0001,():
-1年11月30日
Cake layer formed on membrane surface presents a major challenge to membrane permeation, and it can be considered as a porous media. Determination of the cake layer permeability is critical for an accurate analysis and design of membrane filtration. A permeation model, based on fractal theory and Darcy's law, for evaluating cake layer permeability in microfiltration of activated sludge wastewater was developed. The cake layer permeability was derived and found to be a function of the pore-area fractal dimension and microstructural parameters. The validity of the model was studied systematically in this paper. The permeation model was applied to study the effect of mixed liquid suspended solids (MLSS) concentration, particle size distribution (PSD) and extracelluler polymeric substance (EPS) on cake layer permeability in a submerged membrane bioreactor. Results showed that the permeation model was a useful tool to study the micromechanism of membrane fouling. There was a close correlation between MLSS concentration and cake layer permeability. There were a slight and a distinct decrease of the cake layer permeation as MLSS increased less and larger than 10,000mg/L, respectively. PSD and EPS are two significant factors affecting cake layer permeability in membrane bioreactor. Effect of activated sludge on cake layer permeability was mainly caused by EPS and small particles attached on membrane surface.
Membrane bioreactor, Membrane fouling, Cake layer, Permeation factor, Fractal theory
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【期刊论文】Effect of filamentous bacteria on membrane fouling in submerged membrane bioreactor
张捍民, Fangang Meng, Hanmin Zhang∗, Fenglin Yang, Yansong Li, Jingni Xiao, Xingwen Zhang
Journal of Membrane Science 272(2006)161-168,-0001,():
-1年11月30日
Membrane fouling is the major problem that hinders the practical application of membrane bioreactor (MBR) systems. Since the MBR system includes living microorganisms and their metabolites, the fouling mechanism is even more complex than that of conventional membrane separation processes. This paper provides an improved understanding of the influence of filamentous bacteria on membrane fouling in microfiltration of activated sludge wastewater. In order to make clear the membrane fouling mechanism of filamentous bacteria, the physicochemical characteristics of sludge flocs, including extracellular polymeric substance (EPS), zeta potential, relative hydrophobicity (RH) and floc morphology were systematically investigated. The results showed that the sludge flocs with negligible filamentous bacteria led to severe membrane pore blocking, and the sludge flocs with filamentous bacteria created the formation of a non-porous cake layer on the membrane surface. The excess growth of filamentous bacteria resulted in much more release of EPS, lower zeta potential, higher hydrophobicity of sludge flocs and more irregularly shaped flocs, which did great harm to membrane filtration. The sludge flocs with a small quantity of filamentous bacteria had a positive effect on membrane permeation. It is important to control filamentous bacteria concentration in the operation of MBRs.
Membrane bioreactor, Membrane fouling, Filamentous bacteria, Extracellular polymeric substances (, EPS), , Zeta potential, Hydrophobicity
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张捍民, Fangang Meng∗, Hanmin Zhang, Fenglin Yang, Shoutong Zhang, Yansong Li, Xingwen Zhang
Separation and Purification Technology 51(2006)95-103,-0001,():
-1年11月30日
This paper examines the influence of activated sludge properties such as the mixed liquid of suspended solids (MLSS) concentration, sludge particle size distribution (PSD), extracellular polymeric substances (EPS), soluble microbial products (SMP), suspended solids in supernatant (SSs), dynamic viscosity (µ), relative hydrophobicity (RH), and zeta potential on membrane fouling. ctivated sludge samples from different full-scale and lab-scale membrane bioreactor processes were used to study their impacts on membrane fouling. The influence of activated sludge properties on membrane permeation was identified with statistical methods. The results showed that MLSS concentration had an exponential relationship with membrane fouling resistance. The sludge particle size (rp=−0.730) was correlated inversely to the membrane fouling resistance significantly. The total EPS (rp=0.898) and protein (rp=0.810) had strong positive effect on membrane fouling resistance, but carbohydrate (rp=0.626) had a moderate correlation with membrane fouling resistance due to its low amounts. SMP (rp=0.757), SSs (rp=0.810), dynamic viscosity (rp=0.691), RH (rp=0.837), and zeta potential (rp=−0.881) also had significant influence on membrane permeability. However, protein (rp=0.936), SMP (rp=0.725), SSs (rp=0.783), dynamic viscosity (rp=0.633), RH (rp=0.877), and zeta potential (rp=−0.953) mainly resulted from the change of EPS concentration. These results confirm that MLSS concentration, PSD and EPS were the predominant factors affecting membrane fouling during membrane filtration of sludge suspension. The membrane fouling resistance can be predicted using a simple model based on MLSS concentration, PSD and EPS.
Membrane bioreactor, Membrane fouling, Activated sludge properties, Sludge particle size distribution, Extracellular polymeric substances, Statistical analysis
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张捍民, Maosheng Ye, Hanmin Zhang*, Qifeng Wei, Haifen Lei, Fenglin Yang, Xinwen Zhang
Desalination 194(2006)108-120,-0001,():
-1年11月30日
The membrane bioreactor (MBR) is an important process widely used in wastewater treatment. However, membrane flux declines rapidly due to membrane fouling, which limits the application of MBR. In order to alleviate membrane fouling, a precoated dynamic membrane (PDM) was studied systematically. The membrane module consisted of of 56-µm terylene filter cloth as the support membrane and powder-activated carbon (PAC) as the precoating reagent. The precoated dynamic membrane bioreactor (PDMBR) was used in municipal wastewater treatment practice. Meanwhile, from the viewpoint of retention capacity, flux recovery and alleviating membrane fouling, the suitable thickness of the PAC dynamic membrane was also investigated. The experimental results showed that the formation of PDM from PAC on a support membrane belonged to the cake filtering model, and the relationship of PDM resistance (Ra) and its thickness (D) was in accord with log-function; the suitable thickness was controlled around 0.3 mm. It was found that while the flux of PDM was kept at a high value, the operating pressure of PDM rose to 42 kPa after 43 days of stable operation of the PDMBR, and the removal efficiency of effluent COD and NH4+-N were as good as traditional hollow membrane bioreactors. Furthermore, the flux of the fouled membrane could be totally recovered just after being cleaned by brushing, and it did not consume any chemical reagents. Moreover, it was also found that the PDM could prevent biomass contaminations diffusing from the surface inwards by scanning electron microscopy (SEM).
Precoated dynamic membrane, Precoating reagent, Precoated dynamic membrane bioreactor, Membrane fouling
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张捍民, 乔森, 叶茂盛, 张兴文, 杨凤林
环境科学学报,2005,2(25):249~253,-0001,():
-1年11月30日
采用孔径56μm的工业滤布制作膜组件,以PAC作为预涂剂,组成预涂动态膜-生物反应器。对比预涂膜、未预涂膜和014μm中空纤维膜的污染物去除效果和膜污染状况。试验结果发现,预涂动态膜2生物反应器不仅污染物质去除效果更好,而且预涂膜可以防止污染物质与微生物向膜材料表面和内部扩散,从而减轻膜污染,运行1128h后,操作压力仅上升至6kPa,并且只需刷洗,膜通量就可以恢复,无须消耗化学试剂。
预涂, 膜-生物反应器, 膜污染
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张捍民, 肖景霓, 成英俊, 张兴文, 杨凤林
环境科学学报,2005,2(25):242~248,-0001,():
-1年11月30日
对序批式运行方式强化膜生物反应器脱氮除磷效果进行了研究。在试验过程中逐渐降低进水CODPTN值,提高总氮负荷,比较序批式膜生物反应器和传统膜生物反应器的脱氮除磷性能与膜污染状况。试验结果表明,进水CODPTN降至318~813,总氮负荷提高至0122kg·m-3·d-1时,传统膜生物反应器无法脱氮,而序批式膜生物反应器通过改变周期、提高交换比等方式,TN和氨氮去除率分别保持在6716%和9311%.序批式的运行方式还可以减轻膜污染.
序批式膜生物反应器, 脱氮除磷, 膜污染
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