厌氧平板膜生物反应器连续处理猪场废水研究  

Continuous methane fermentation of swine wastewater using a flat sheet membrane bio-reactor

作　　者：乔玮[1,2] 姜萌萌 Wandera S M[1,2] 熊林鹏 任征然 董仁杰 QIAO Wei;JIANG Meng-meng;Wandera S M;XIONG Lin-peng;REN Zheng-ran;DONG Ren-jie(College of Engineering,China Agricultural University,Beijing 100083,China;R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels,Energy Authority,National Development and Reform Committee (BGFeuls) Beijing 100083,China;Institute of Yantai,China Agricultural University,Yantai 264670,China)

机构地区：[1]中国农业大学工学院,北京100083 [2]国家能源生物燃气高效制备及综合利用技术研发(试验)中心,北京100083 [3]中国农业大学烟台研究院,山东烟台264670

出　　处：《中国环境科学》2018年第12期4502-4508,共7页China Environmental Science

基　　金：“十三五”国家重点研发计划课题(2016YFD0501403);国家自然科学基金资助项目(51778616);北京市科技计划课题(D1611000016003,D1611000016001).

摘　　要：本研究以实际猪场废水为原料,在中温(37±1)℃条件下利用浸没式平板膜生物反应器进行180d连续厌氧发酵试验,以水力停留时间5,3和2d的梯度变化逐渐增加容积负荷,研究反应器运行性能,污泥比产甲烷活性,膜过滤特性和膜的清洗效果.试验结果表明,随水力停留时间的缩短,反应器的容积产沼气率分别达到0.68,1.03和1.12L/(L·d),稳定运行期间出水的总挥发性脂肪酸分别为(169±41) mg/L,(15±3) mg/L和(114±45) mg/L,以乙酸为主.反应器中厌氧污泥的乙酸比产甲烷活性测试表明,以2000mg/L的乙酸为基质,HRT 3d时具有最大比产甲烷活性1.127g-COD/(g-VSS·d).本试验发生膜污染的周期约4个月.采用2%的柠檬酸浸泡3h,可以恢复膜的过滤性能.在较低通量下,反应器中7～32g/L的污泥浓度并不会明显的影响平板膜的过滤性能.本研究结果显示,厌氧膜生物反应器有处理猪场废水的可能性.A180-days'continuous experiment with anaerobic membrane reactor(AnMBR)were carried out to treat swine wastewater at mesophilic condition.The organic loading rate(OLR)was increased by shortening the hydraulic retention time(HRT)stepwise through5,3and2days.The gas production and performance of AnMBR,specific methanogenic activity(SMA)at different HRTs of the membrane reactor and performance of membrane filtration was studied in this research.With the shortening of HRTs,gas production rate increased from0.68to1.03and1.12L/(L·d).While the TVFA of permeate was less than500mg/L at the whole operation,which was(169±41)mg/L,(15±3)mg/L and(114±45)mg/L,respectively.Acetate was the main part.The best specific methanogenesis was got at HRT3days whose value was1.127g-COD/(g-VSS·d)at2000mg/L acetate acid concentration.A cycle of membrane fouling was about4months.The membrane filtration was then recovered by soaking the membrane sheet with2%citric acid for3hours.Under the lower flux,the sludge concentration of7~32g/L in the reactor did not significantly affect the filtration performance of the flat-sheet membrane.

关 键 词：猪场废水 厌氧膜生物反应器 污泥比产甲烷活性 膜污染和清洗 

分 类 号：X713[环境科学与工程—环境工程]