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  • Received:2004-10-27 Revised:1900-01-01 Online:2006-08-24 Published:2006-08-24
  • Contact: LIU Doudou

Abstract: According to the characteristic of the sweet potato wastewater which has high COD and better biodegradability, ABR is used to treat it in this paper. In the experiment process, the startup of ABR and the feature of granular sludge were studied; the characteristics of hydrolysisacidification process and controlling approaches in an anaerobic baffled reactor were found out; the treatment effect of ABR in different HRT was analysized and the best operation condition in treating sweet potato starch wastewater was presented. It is shown: the reactor was started up during 20 days by using granular anaerobic sludge as seed sludge; the best HRT of reactor is 60h, and the removal ratio of COD is 94.3%; in order to ensure ABR having higher removal ratio, the biggest organic loading of ABR is 12.0 kg/(m3·d); by taking the measure of adjusting alkaline and decreasing organic load together, methanogenic of sludge is gradually recovering after continuous 20 days.

Key words: sweet potato starch wastewater, sludge characteristics, acidification, secondary , anaerobic baffled reactor

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