TY - JOUR
T1 - Anaerobic bioconversion of petrochemical wastewater to biomethane in a semi-continuous bioreactor
T2 - Biodegradability, mineralization behaviors and methane productivity
AU - Tan, Yujie
AU - Zheng, Chaoting
AU - Cai, Teng
AU - Niu, Chengxin
AU - Wang, Shasha
AU - Pan, Yang
AU - Lu, Xueqin
AU - Zhen, Guangyin
AU - Qian, Guangren
AU - Zhao, Youcai
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/5
Y1 - 2020/5
N2 - Petrochemical wastewaters treatment represents a serious challenge due to the high toxicity and complex chemical components. In this study, the biodegradability, mineralization behaviors and methane productivity of eight different types of petrochemical wastewaters were evaluated in series of semi-continuous bioreactors. Methane production strongly depended on the characteristics of wastewaters and chemical constituents. The highest methane yield of 305.9 ± 2.7 mL/g-COD was achieved by purified terephthalic acid wastewater, followed by ethylene glycol, polyester, etc. Comparatively, one-step-SCN− wastewater produced the lowest methane yield (4.7 ± 0.7 mL/g-COD) owing to high toxicity and low biodegradability. Modified Gompertz model confirmed that purified terephthalic acid, ethylene glycol and polyester wastewaters had a short lag-phase of 1.2, 1.7 and 0.2 days, respectively. Nonetheless, the formation of by-products such as proteins, polysaccharides and ammonia nitrogen throughout anaerobic digestion reflected the high activity of anaerobic microorganisms, confirming the technical feasibility of anaerobic biotechnology in treating petrochemical wastewaters.
AB - Petrochemical wastewaters treatment represents a serious challenge due to the high toxicity and complex chemical components. In this study, the biodegradability, mineralization behaviors and methane productivity of eight different types of petrochemical wastewaters were evaluated in series of semi-continuous bioreactors. Methane production strongly depended on the characteristics of wastewaters and chemical constituents. The highest methane yield of 305.9 ± 2.7 mL/g-COD was achieved by purified terephthalic acid wastewater, followed by ethylene glycol, polyester, etc. Comparatively, one-step-SCN− wastewater produced the lowest methane yield (4.7 ± 0.7 mL/g-COD) owing to high toxicity and low biodegradability. Modified Gompertz model confirmed that purified terephthalic acid, ethylene glycol and polyester wastewaters had a short lag-phase of 1.2, 1.7 and 0.2 days, respectively. Nonetheless, the formation of by-products such as proteins, polysaccharides and ammonia nitrogen throughout anaerobic digestion reflected the high activity of anaerobic microorganisms, confirming the technical feasibility of anaerobic biotechnology in treating petrochemical wastewaters.
KW - Anaerobic bioconversion
KW - Dewatering
KW - Model fitting
KW - Petrochemical wastewaters
UR - https://www.scopus.com/pages/publications/85079406178
U2 - 10.1016/j.biortech.2020.123005
DO - 10.1016/j.biortech.2020.123005
M3 - 文章
C2 - 32070840
AN - SCOPUS:85079406178
SN - 0960-8524
VL - 304
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 123005
ER -
