|Table of Contents|

Characteristics of Sludge Granulation without Carrier in Full-scale UASB Reactor

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2008年05期
Page:
655-660
Research Field:
Publishing date:

Info

Title:
Characteristics of Sludge Granulation without Carrier in Full-scale UASB Reactor
Author(s):
LI Zai-xing12YANG Jing-liang1LIU Chun1GUO Jian-bo1XING Li-nan1
1.School of Environmental Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China;2.Civil and Environmental Engineering School,University ofScience and Technlogy Beijing,Beijing 100083,China
Keywords:
upflow anaerobic sludge blankets full-scale reactors avermectin wastewater granulation without carrier sludge characteristics
PACS:
X703.1
DOI:
-
Abstract:
The sludge characteristics in a full-scale upflow anaerobic sludge blanket(UASB) reactor treating avermectin wastewater are investigated in the process of sludge granulation without carrier.The results show that: inoculated with floc sludge,sludge granulation without carrier can be realized successfully after running for 189 d in the bioreactor.The characteristics of sludge varies remarkably during the sludge granulation.The ratio of VSS/SS increases from 0.45 to 0.8.The settling velocities are significantly improved.The methanogenic activity increases from 57.3 to 299 mL/(gVSS·d) and the content of extra cellular polymers(ECP) varies from 31.4 to 58.3 mg/g.The ECP increase plays a key role in the process of granular sludge formation without carrier.The mature granular sludge is grey-black with the diameter of 1.0 to 2.0 mm,the specific gravity of 1.082 g/cm3 and the average settling velocity of 65.3 m/h.The bacilliform and filamentous fungi are dominant on the surface of the granular sludge and the rod-type and shortly bacillary fungi are dominant inside the granular sludge.

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Last Update: 2012-12-19