Aerobic particle sludge method for treating town sewage and aerobic particle sludge thereof

Yu, Hanqing, Ni, Bingjie, Liu, Shaogen, Xie, Wenming and Zheng, Yuming (2009). Aerobic particle sludge method for treating town sewage and aerobic particle sludge thereof. CN101229947.

Creator Yu, Hanqing
Ni, Bingjie
Liu, Shaogen
Xie, Wenming
Zheng, Yuming
Patent title Aerobic particle sludge method for treating town sewage and aerobic particle sludge thereof
Date of issue 2009-10-14
Patent owner University of Science and Technology of China
Patent number CN101229947
Country of origin China
Language eng
chi
Subjects 291104 Environmental Technologies
Abstract/Summary The invention provides an aerobic granular sludge method for treating city sewage and the aerobic granular sludge, characterized in that a reactor adopts 8-15 ratio of height-to-diameter and 50-80 percent of drainage rate; air is compressed and filled into the bottom of the reactor; after flocculent sludge is inoculated, the drainage rate increases from 40 percent to 60 percent to 80 percent with the increase of 5 percent to10 percent per month; the operation cycle time shortens from 4-6 hours to 2-3 hours with the shortness of 1 hour per mouth; the sedimentation time decreases from 30-40 minutes to 15-20 minutes with the decrease of 1-2 minutes per week; the stable operation is carried out until the aerobic granular sludge takes 50-85 percent of reaction region volume of the reactor; the obtained aerobic granular sludge has large-sized particle, rapid sedimentation speed, compact structure and strong resistance to the environmental change. The invention overcomes the defects of expanded sludge, floated sludge, giant structure of an aeration tank as well as large occupied area, high investment and operation cost and unstable system operation in the prior art.

Document type: Patent
Collection: Advanced Water Management Centre Publications
 
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Created: Tue, 30 Apr 2013, 14:04:09 EST by Bing-Jie Ni on behalf of Advanced Water Management Centre