学术
Production and application of anaerobic granular sludge produced by landfill
WANG Jin[1] ZHANG Zhen-jia[1] ZHANG Zhi-feng[2] QAISAR Mahmood[3] ZHENG Ping[3]
[1]College of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 [2]Shaoxing Wastewater Treatment Development Co., Ltd., Shaoxing 312074, China [3]Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China
文章出处:
《环境科学学报：英文版》-2007年19卷12期 -1454-1460页
栏目信息:
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Production and application of anaerobic granular sludge produced by landfill
Abstract:
Sludge granulation is considered to be the most critical parameter governing successful operation of an upflow anaerobic sludge blanket and expanded granular sludge bed （EGSB） reactors. Pre-granulated seeding sludge could greatly reduce the required startup time. Two lab-scale and a pilot-scale EGSB reactors were operated to treat Shaoxing Wastewater Treatment Plant （SWWTP） containing wastewater from real engineering printing and dyeing with high pH and sulfate concentration. The microbiological structure and the particle size distribution in aerobic excess sludge, sanitary landfill sludge digested for one year, and the granular sludge of EGSB reactor after 400 d of operation were analyzed through scanning electron microscopy （SEM） and sieves. The lab-scale EGSB reactor seeded with anaerobic sludge after digestion for one year in landfill showed obviously better total chemical oxygen demand （TCOD） removal efficiency than one seeded with aerobic excess sludge after cation polyacrylamide flocculation-concentration and dehydration. The TCOD removed was 470.8 mg/L in pilot scale EGSB reactor at short hydraulic retention time of 15 h. SEM of sludge granules showed that the microbiological structure of the sludge from different sources showed some differences. SEM demonstrated that Methanobacterium sp. was present in the granules of pilot-scale EGSB and the granular sludge produced by landfill contained a mixture of anaerobic/anoxic organisms in abundance. The particle size distribution in EGSB demonstrated that using anaerobic granular sludge produced by sanitary landfill as the seeding granular sludge was feasible.[著者文摘]
Key words:
anaerobic granular sludge; expanded granular sludge bed （EGSB）; granulation; landfill; seeding sludge
基金资助:
Project supported by the Major Scientific Key Problem Program of Scientific Commission of Zhejiang Province, China （2004C 13027）. The authors thank Yi-jian LAI and Xin-qiu GUO from Instrumental Analysis Center, Shanghai Jiao Tong University for their assistance in SEM and TEM analyses and useful comments.
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