朱雷1,
许颖2,
黄霞2
1.武汉科技大学城市建设学院，武汉 430070
2.清华大学环境学院环境模拟与污染控制国家重点联合实验室，北京 100084
基金项目: 科技部国际科技创新合作重点专项（2016YFE0118500）
Analysis on factors influencing formation of dynamic membrane and operational cycle in anaerobic dynamic membrane bioreactor
CHENG Gang1,,ZHU Lei1,
XU Ying2,
HUANG Xia2
1.School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430070, China
2.State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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摘要:为探究影响厌氧动态膜生物反应器（AnDMBR）稳定运行的因素，选用不锈钢网为基材构建AnDMBR并用于处理生活污水，着重考察了不锈钢网孔径（200、300 和500目）、混合液污泥浓度及膜通量对AnDMBR成膜及运行周期的影响。结果表明：不锈钢网的目数越大，动态膜形成越快，但运行周期较短；低污泥浓度成膜时间较慢，但运行周期较长；污泥胞外多聚物（EPS）对动态膜的形成及运行周期影响较大，EPS越高，动态膜形成越快，但动态膜堵塞越严重；高通量更容易导致动态膜堵塞。选用300 目的不锈钢网，在污泥浓度为2 000 mg·L-1，通量为32 L·(m2·h)-1的条件下开展的连续实验表明，AnDMBR稳定运行周期可达240 h。清洗实验结果表明离线清洗方式更适用于动态膜的清除。
关键词: 厌氧动态膜生物反应器/
不锈钢网孔径/
污泥浓度/
运行周期
Abstract:An anaerobic dynamic membrane bioreactor (AnDMBR) was established by using stainless steel mesh as base material for dynamic membrane formation to explore the factors affecting the stable operation of AnDMBR for treatment of domestic wastewater. The influences of stainless steel mesh pore size (200, 300 and 500 mesh), sludge concentration and membrane flux on the formation of dynamic membrane and operational cycle were investigated. The results showed that the larger sieve mesh number of stainless steel made faster formation of dynamic membrane but shorter operation cycle. The operational cycle was longer with lower sludge concentration, but the dynamic membrane formation was slower. The effect of extra-cellular polymeric substances (EPS) on the formation of dynamic membrane and operational cycle is larger. The higher EPS concentration led to faster dynamic membrane formation and more serious membrane blocking. Higher flux also led to more severe membrane blocking. When stainless steel of 300 mesh was used as the base material, the sludge concentration was 2 000 mg·L-1, and the flux was 32 L·(m2·h)-1, the operational cycle of AnDMBR could be extended to 240 h in continuous experiment. The results of membrane cleaning experiments showed that off-line physical cleaning was more efficient for AnDMBR.
Key words:anaerobic dynamic membrane bioreactor/
stainless steel mesh pore size/
sludge concentration/
operation cycle.
| [1] | .HUANG X, XIAO K, SHEN Y X.Recent advances in membrane bioreactor technology for wastewater treatment in China[J].Frontiers of Environmental Science & Engineering in China,2010,4(3):245-271 |
| [2] | .OZGUN H, DERELI R K, ERSAHIN M E, et al.A review of anaerobic membrane bioreactors for municipal wastewater treatment:Integration options,limitations and expectations[J].Separation and Purification Technology,2013,118:89-104 10.1016/j.seppur.2013.06.036 |
| [3] | .SKOUTERIS G, HERMOSILLA D, LOPEZ P R, et al.Anaerobic membrane bioreactors for wastewater treatment: A review[J].Chemical Engineering Journal,2012,198:138-148 10.1016/j.cej.2012.05.070 |
| [4] | .IORHEMEN O T, HAMZA R A, TAY J H.Membrane bioreactor (MBR) technology for wastewater treatment and reclamation: Membrane fouling[J].Membranes,2016,6(2):33-62 10.3390/membranes6020033 |
| [5] | .YU Z, DONG B.Recent advances in dynamic membrane bio-reactor[C]// IEEE.International Symposium on Water Resource and Environmental Protection,2011:1283-1286 |
| [6] | . 唐虹,康得军,匡帅,等. 胞外聚合物提取方法的研究进展[J]. 市政技术,2016,34(5):162-166 |
| [7] | . 袁栋栋,樊耀波,徐国良,等. 膜生物反应器中临界通量理论的研究[J]. 膜科学与技术,2010,30(2):97-103 |
| [8] | .ZHANG X, WANG Z, WU Z, et al.Membrane fouling in an anaerobic dynamic membrane bioreactor (AnDMBR) for municipal wastewater treatment:Characteristics of membrane foulants and bulk sludge[J].Process Biochemistry,2011,46(8):1538-1544 10.1016/j.procbio.2011.04.002 |
| [9] | .CHU H, ZHANG Y, ZHOU X, et al.Dynamic membrane bioreactor for wastewater treatment: Operation, critical flux, and dynamic membrane structure[J].Journal of Membrane Science,2014,450:265-271 10.1016/j.memsci.2013.08.045 |
| [10] | .LIANG S, QU L, MENG F, et al.Effect of sludge properties on the filtration characteristics of self-forming dynamic membranes (SFDMs) in aerobic bioreactors: Formation time, filtration resistance, and fouling propensity[J].Journal of Membrane Science,2013,436:186-194 10.1016/j.memsci.2013.02.021 |
| [11] | .YU H, WANG Z, WU Z, et al.Dynamic membrane formation in anaerobic dynamic membrane bioreactors:Role of extracellular polymeric substances[J].Plos One,2015,10(10):e0139703 10.1371/journal.pone.0139703 |
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厌氧动态膜生物反应器中动态膜形成及其运行周期的影响因素分析
程刚1,,朱雷1,
许颖2,
黄霞2
1.武汉科技大学城市建设学院，武汉 430070
2.清华大学环境学院环境模拟与污染控制国家重点联合实验室，北京 100084
基金项目: 科技部国际科技创新合作重点专项（2016YFE0118500）
关键词: 厌氧动态膜生物反应器/
不锈钢网孔径/
污泥浓度/
运行周期
摘要:为探究影响厌氧动态膜生物反应器（AnDMBR）稳定运行的因素，选用不锈钢网为基材构建AnDMBR并用于处理生活污水，着重考察了不锈钢网孔径（200、300 和500目）、混合液污泥浓度及膜通量对AnDMBR成膜及运行周期的影响。结果表明：不锈钢网的目数越大，动态膜形成越快，但运行周期较短；低污泥浓度成膜时间较慢，但运行周期较长；污泥胞外多聚物（EPS）对动态膜的形成及运行周期影响较大，EPS越高，动态膜形成越快，但动态膜堵塞越严重；高通量更容易导致动态膜堵塞。选用300 目的不锈钢网，在污泥浓度为2 000 mg·L-1，通量为32 L·(m2·h)-1的条件下开展的连续实验表明，AnDMBR稳定运行周期可达240 h。清洗实验结果表明离线清洗方式更适用于动态膜的清除。
English Abstract
Analysis on factors influencing formation of dynamic membrane and operational cycle in anaerobic dynamic membrane bioreactor
CHENG Gang1,,ZHU Lei1,
XU Ying2,
HUANG Xia2
1.School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430070, China
2.State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
Keywords: anaerobic dynamic membrane bioreactor/
stainless steel mesh pore size/
sludge concentration/
operation cycle
Abstract:An anaerobic dynamic membrane bioreactor (AnDMBR) was established by using stainless steel mesh as base material for dynamic membrane formation to explore the factors affecting the stable operation of AnDMBR for treatment of domestic wastewater. The influences of stainless steel mesh pore size (200, 300 and 500 mesh), sludge concentration and membrane flux on the formation of dynamic membrane and operational cycle were investigated. The results showed that the larger sieve mesh number of stainless steel made faster formation of dynamic membrane but shorter operation cycle. The operational cycle was longer with lower sludge concentration, but the dynamic membrane formation was slower. The effect of extra-cellular polymeric substances (EPS) on the formation of dynamic membrane and operational cycle is larger. The higher EPS concentration led to faster dynamic membrane formation and more serious membrane blocking. Higher flux also led to more severe membrane blocking. When stainless steel of 300 mesh was used as the base material, the sludge concentration was 2 000 mg·L-1, and the flux was 32 L·(m2·h)-1, the operational cycle of AnDMBR could be extended to 240 h in continuous experiment. The results of membrane cleaning experiments showed that off-line physical cleaning was more efficient for AnDMBR.
