TY - JOUR
T1 - Continuous fed-batch alternating aerobic and anoxic system for biodegradation of Decontaminating Solution 2 with high nitrogen content
AU - Kim, Michael H.
AU - DeFrank, Joseph J.
AU - Lee, Jin Hyung
AU - Kim, Hyunook
N1 - Publisher Copyright:
© 2018
PY - 2018/6
Y1 - 2018/6
N2 - A continuous fed-batch alternating aerobic and anoxic (CFBAAA) activated sludge system was developed for biodegradation of the US Army's Decontaminating Solution 2 (DS2). The high nitrogen content in DS2 (approximately 28.5% by weight) necessitated a new nitrification/denitrification process scheme for biological nitrogen removal. Nitrification, conversion of NH4+ from the DS2 degradation to NO3−, is accomplished simultaneously along with the DS2 degradation under aerobic conditions, and denitrification, conversion of accumulated NO3− to N2, is achieved under anoxic conditions in which the air supply is ceased. A one-day cycle with 16 h air-on and 8 h of air-off was used. Overall, the CFBAAA system could achieve COD removal of >97% and TN of >99% at a hydraulic retention time of 16 d, when 1% DS2 (equivalent to 17,500 mg COD L−1 and 2850 mg N L−1) was fed. In addition, due to its cyclic operation mode, the CFBAAA system could reduce 1/3 of electricity consumption compared to the conventional activated sludge system.
AB - A continuous fed-batch alternating aerobic and anoxic (CFBAAA) activated sludge system was developed for biodegradation of the US Army's Decontaminating Solution 2 (DS2). The high nitrogen content in DS2 (approximately 28.5% by weight) necessitated a new nitrification/denitrification process scheme for biological nitrogen removal. Nitrification, conversion of NH4+ from the DS2 degradation to NO3−, is accomplished simultaneously along with the DS2 degradation under aerobic conditions, and denitrification, conversion of accumulated NO3− to N2, is achieved under anoxic conditions in which the air supply is ceased. A one-day cycle with 16 h air-on and 8 h of air-off was used. Overall, the CFBAAA system could achieve COD removal of >97% and TN of >99% at a hydraulic retention time of 16 d, when 1% DS2 (equivalent to 17,500 mg COD L−1 and 2850 mg N L−1) was fed. In addition, due to its cyclic operation mode, the CFBAAA system could reduce 1/3 of electricity consumption compared to the conventional activated sludge system.
UR - http://www.scopus.com/inward/record.url?scp=85058475021&partnerID=8YFLogxK
U2 - 10.1016/j.wen.2018.05.002
DO - 10.1016/j.wen.2018.05.002
M3 - Article
AN - SCOPUS:85058475021
SN - 2588-9125
VL - 1
SP - 47
EP - 55
JO - Water-Energy Nexus
JF - Water-Energy Nexus
IS - 1
ER -