Journal
BIORESOURCE TECHNOLOGY
Volume 136, Issue -, Pages 169-175Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.02.096
Keywords
Sewage; Low excess sludge; Down-flow hanging sponge (DHS); Microfauna
Funding
- New Energy and Industrial Technology Development Organization (NEDO)
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- SATREPS, JST/JICA, Japan
- Grants-in-Aid for Scientific Research [23246095] Funding Source: KAKEN
Ask authors/readers for more resources
Experiments to characterize retained sludge in a down-flow hanging sponge (DHS) reactor fed with upflow anaerobic sludge blanket (UASB) treated sewage under moderate conditions were conducted. Plenty of oxygen was supplied through the DHS reactor without aeration and the effluent qualities after the reactor were comparable to activated sludge processes. The average excess sludge production rate was 0.09 g SS g(-1) COD removed. The DHS reactor maintained a high sludge concentration of 26.9 g VSS L-1 sponge, resulting in a low loading rate of 0.032 g(-1) COD g(-1) VSS day-1. The endogenous respiration rate of DHS sludge was comparable to previously reported aerobic sludges. The numbers of microfauna were one order of magnitude greater than those in activated sludge. The results indicated that low excess sludge production was attributable to the high sludge concentration, sufficient oxygen supply, adequate endogenous respiration rate, and a high density and diversity of microfauna. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available