Performance and bioparticle growth of anaerobic baffled reactor （ABR） fed with low-strength domestic sewage

作     者：Jing FENG Yili WANG Xueyuan JI Dongqin YUAN Hui LI 

作者机构：College of Environmental Science and Engineering Beijing Key Laboratory for Source Control Technology of Water Pollution Beijing Forestry University Beijing 100083 China 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2015年第9卷第2期

页      面：352-364页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：Acknowledgements This work was supported by the Fundamental Research Funds for the Central Universities (Nos. JC2011-1 and TD2010- 5)  Major projects on control and rectification of water body pollution (No. 2008ZX07314-006-02)  the National Natural Science Foundation of China (Grant Nos. 51078035 and 21177010)  and the Ph.D. Programs Foundation of the Ministry of Education of China (No. 20100014110004) 

主　　题：anaerobic baffled reactor low-strengthdomestic wastewater start-up bioparticles morphology 

摘      要：We investigated the performance of a 15.3 L capacity anaerobic baffled reactor （ABR） toward the treatment of low-strength domestic wastewater. The start- up period of the ABR was finished within approximately 130 days at a temperature below 25~C. The average CODcr in the effluent was 165 mg.L 1 and the corresponding CODcr removal efficiency of the ABR was 52.3%. During the third stage （from day 130 to day 233） of ABR operation, the average CODcr in the effluent reached 71 mg· L^-1, which meets the secondary discharge requirement of the Integrated Wastewater Discharge Standard （GB 18918-2002, China）. Moreover, partial microbial separa- tion was observed along the five ABR compartments through scanning electron microscopic images. The geometric mean diameter of bioparticles in the five compartments increased from 0.050 mm to 0.111, 0.107, 0.104, 0.110, and 0.103 mm during the start-up stage. After operation for 179days, the further increased to 0.376, corresponding diameters 0.225, 0.253, 0.239, and 0.288mm, respectively. The fractal dimensions of the bioparticles indicated that these particles have smoother surfaces and more compact structures during ABR operation. Morphological analysis of the bioparticle sections demonstrated that the bioparticles have a pore volume of 30%-55%. The highest porosity was observed for the bioparticles in the second ABR compartment, whereas the lowest fractal dimension ofbioparticle section was observed in the fifth compartment.