TY - JOUR
T1 - Achieving successive methanation and low-carbon denitrogenation by a novel three-stage process for energy-efficient wastewater treatment
AU - Lei, Zhen
AU - Yang, Shuming
AU - Wang, Lianxu
AU - Huang, Xingyuan
AU - Wang, Xiaochang C.
AU - Li, Yu You
AU - Li, Qian
AU - Zhao, Yu
AU - Chen, Rong
N1 - Funding Information:
This work was supported by the Shaanxi Provincial Key Program for Science and Technology Development (No. 2018KWZ-06), the National Key Research and Development Program of China (No. 2017YFE0127300), the Shaanxi Program for Overseas Returnees (No. 2018012), and the Shaanxi Provincial Program for Innovative Research Team (No. 2019TD-025).
Funding Information:
This work was supported by the Shaanxi Provincial Key Program for Science and Technology Development (No. 2018KWZ-06 ), the National Key Research and Development Program of China (No. 2017YFE0127300 ), the Shaanxi Program for Overseas Returnees (No. 2018012 ), and the Shaanxi Provincial Program for Innovative Research Team (No. 2019TD-025 ).
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/12/10
Y1 - 2020/12/10
N2 - A novel sewage treatment process aimed at achieving successive methanation and low-carbon denitrogenation was configured by integrating anaerobic membrane bioreactors with nitritation-Anammox. The system performance, pollutant removal pathways, and process dynamics were investigated via analysis of pollutant transformations and microbial consortia in each reactor. The results indicated average removal efficiencies of 97.3% and 76.4%, respectively, for chemical oxygen demand and total nitrogen, corresponding to a chemical oxygen demand-to-methane conversion rate of over 83%. Organics removal was achieved mainly in the anaerobic membrane bioreactor, while denitrogenation was attained in the Anammox reactor. Hydrolysis and acidification in the anaerobic membrane bioreactor was attributable mainly to Anaerolineales, Bacteroidales, and Clostridiales. Methanothrix (58.4%) and Methanolinea (30.0%) were the primary contributors to methane production. Almost half of the NH4+-N in the AnMBR effluent was converted into NO2−-N in the nitritation reactor by Nitrosomonas. Ca. Brocadia contributed to further oxidation and removal of the residual NH4+-N using NO2−-N in the Anammox reactor. Overall, upfront methanation and subsequent low-carbon denitrogenation were achieved by integrating anaerobic membrane bioreactors with nitritation-Anammox, which provides a promising technology in the new paradigm of wastewater treatment.
AB - A novel sewage treatment process aimed at achieving successive methanation and low-carbon denitrogenation was configured by integrating anaerobic membrane bioreactors with nitritation-Anammox. The system performance, pollutant removal pathways, and process dynamics were investigated via analysis of pollutant transformations and microbial consortia in each reactor. The results indicated average removal efficiencies of 97.3% and 76.4%, respectively, for chemical oxygen demand and total nitrogen, corresponding to a chemical oxygen demand-to-methane conversion rate of over 83%. Organics removal was achieved mainly in the anaerobic membrane bioreactor, while denitrogenation was attained in the Anammox reactor. Hydrolysis and acidification in the anaerobic membrane bioreactor was attributable mainly to Anaerolineales, Bacteroidales, and Clostridiales. Methanothrix (58.4%) and Methanolinea (30.0%) were the primary contributors to methane production. Almost half of the NH4+-N in the AnMBR effluent was converted into NO2−-N in the nitritation reactor by Nitrosomonas. Ca. Brocadia contributed to further oxidation and removal of the residual NH4+-N using NO2−-N in the Anammox reactor. Overall, upfront methanation and subsequent low-carbon denitrogenation were achieved by integrating anaerobic membrane bioreactors with nitritation-Anammox, which provides a promising technology in the new paradigm of wastewater treatment.
KW - Anaerobic membrane bioreactors
KW - Anammox
KW - Energy recovery
KW - Low-carbon denitrogenation
KW - Sewage mainstream
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U2 - 10.1016/j.jclepro.2020.124245
DO - 10.1016/j.jclepro.2020.124245
M3 - Article
AN - SCOPUS:85091564197
SN - 0959-6526
VL - 276
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
M1 - 124245
ER -
