TY - JOUR
T1 - Enhanced performance of short-time aerobic digestion for waste activated sludge under the presence of cocoamidopropyl betaine
AU - Zhou, Yun
AU - Zhang, Jiao
AU - Zhang, Zhiqiang
AU - Zhou, Chen
AU - Sean Lai, Yen Jung
AU - Xia, Siqing
N1 - Funding Information:
This work was supported by the Foundation of State Key Laboratory of Pollution Control and Resource Reuse (Tongji University), China (No. PCRRE16019), China Scholarship Council (No. 201506260022), National Natural Science Foundation of China (Nos. 51678422 and 51378368), Sheng Yun-Fei College Students Scientific and Technological Innovation Fund, and the higher school innovative engineering plan (111 Project).
Publisher Copyright:
© 2017 Elsevier B.V.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2017
Y1 - 2017
N2 - Short-time aerobic digestion (STAD) is a promising technique for waste activated sludge (WAS) stabilization. As a widely used surfactant, cocoamidopropyl betaine (CAPB) could enter wastewater treatment system and influence the WAS properties. It is of big significance to ascertain its influences on the STAD of WAS. CAPB was found to promote the fast removal of organics in WAS. Within 24 h, the removal rate of VSS was up to 28.3%, while no more than 20% was reported in previous studies. The biodegradation rate constants of both VSS and TCOD were increased over 65%. Due to special features of surfactant, CAPB aroused rapid releases of SCOD, PO4 3--P, NH4 +-N and TN within 2 h, and then their values gradually decreased under the aerobic digestion. CAPB was also biodegraded by the system, and the removal rate at 24 h was 91.2%. The biodegradation route contained extracellular adsorption/desorption and aerobic biodegradation. Biodegradable CAPB could lead to a promising performance of the STAD process for WAS and resulted in zero waste discharge from the treatment system.
AB - Short-time aerobic digestion (STAD) is a promising technique for waste activated sludge (WAS) stabilization. As a widely used surfactant, cocoamidopropyl betaine (CAPB) could enter wastewater treatment system and influence the WAS properties. It is of big significance to ascertain its influences on the STAD of WAS. CAPB was found to promote the fast removal of organics in WAS. Within 24 h, the removal rate of VSS was up to 28.3%, while no more than 20% was reported in previous studies. The biodegradation rate constants of both VSS and TCOD were increased over 65%. Due to special features of surfactant, CAPB aroused rapid releases of SCOD, PO4 3--P, NH4 +-N and TN within 2 h, and then their values gradually decreased under the aerobic digestion. CAPB was also biodegraded by the system, and the removal rate at 24 h was 91.2%. The biodegradation route contained extracellular adsorption/desorption and aerobic biodegradation. Biodegradable CAPB could lead to a promising performance of the STAD process for WAS and resulted in zero waste discharge from the treatment system.
KW - Biodegradation
KW - Cocoamidopropyl betaine (CAPB)
KW - Short-time aerobic digestion (STAD)
KW - Surfactant
KW - Waste activated sludge (WAS)
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U2 - 10.1016/j.cej.2017.03.065
DO - 10.1016/j.cej.2017.03.065
M3 - Article
AN - SCOPUS:85015991510
SN - 1385-8947
VL - 320
SP - 494
EP - 500
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -