TY - JOUR
T1 - Biodegradability and methane productivity during anaerobic co-digestion of refractory leachate
AU - Kawai, M.
AU - Kishi, M.
AU - Hamersley, M. R.
AU - Nagao, N.
AU - Hermana, J.
AU - Toda, T.
N1 - Funding Information:
This work was undertaken as part of cooperative research program, the “SEED Project”, between the Institute of Technology Sepuluh Nopember (ITS), Indonesia and the Graduate School of Engineering, Soka University (SU), Japan. We thank Professor Priyo Suprobo, Professor Yulinah Trihadiningrum, Ms. Ipung Fitri Purwanti, Mr. Arie Dipareza Syafei, Dr. Mas Agus Mardyanto of ITS and Professor Hideo Yamamoto of SU for their helpful assistance during our study. This research was partly funded by a grant from the Center of Excellence for Private Universities from Japan's Ministry of Education, Culture, Science and Technology from 2009 to 2013. We are grateful to the Hokubu Sludge Treatment Center, Yokohama, Japan, for preparing and providing the seed sludge.
PY - 2012/8
Y1 - 2012/8
N2 - Mature landfill leachate was anaerobically co-digested with synthetic wastewater to evaluate the degradability and methane productivity in various mixing ratios. The proportion of leachate was increased in three equal steps from 0% to 100%, and then decreased again through the same steps back to 0%. Both COD removal efficiency and methane production decreased as the leachate proportion in the influent was increased. When the influent contained 100% leachate, and when 33% synthetic wastewater was reintroduced, methane production was suppressed relative to COD removal. During the same phases, NH4+ accumulated, suggesting an excess of NH4+ mineralization versus uptake. After 100% leachate was supplied, methane yield decreased to near zero, and the production of methane remained suppressed relative to COD reduction even as more synthetic wastewater was reintroduced, until 100% synthetic wastewater was resupplied. This decline in methane yield might be caused by deterioration of methanogenic bacterial activity following treatment of 100% leachate.
AB - Mature landfill leachate was anaerobically co-digested with synthetic wastewater to evaluate the degradability and methane productivity in various mixing ratios. The proportion of leachate was increased in three equal steps from 0% to 100%, and then decreased again through the same steps back to 0%. Both COD removal efficiency and methane production decreased as the leachate proportion in the influent was increased. When the influent contained 100% leachate, and when 33% synthetic wastewater was reintroduced, methane production was suppressed relative to COD removal. During the same phases, NH4+ accumulated, suggesting an excess of NH4+ mineralization versus uptake. After 100% leachate was supplied, methane yield decreased to near zero, and the production of methane remained suppressed relative to COD reduction even as more synthetic wastewater was reintroduced, until 100% synthetic wastewater was resupplied. This decline in methane yield might be caused by deterioration of methanogenic bacterial activity following treatment of 100% leachate.
KW - Anaerobic co-digestion
KW - Labile
KW - Landfill leachate
KW - Methane yield
KW - Refractory organic matter
UR - http://www.scopus.com/inward/record.url?scp=84861842484&partnerID=8YFLogxK
U2 - 10.1016/j.ibiod.2012.04.003
DO - 10.1016/j.ibiod.2012.04.003
M3 - Article
AN - SCOPUS:84861842484
SN - 0964-8305
VL - 72
SP - 46
EP - 51
JO - International Biodeterioration and Biodegradation
JF - International Biodeterioration and Biodegradation
ER -