Insights into the carbon neutrality for the treatment process engineering of municipal wastewater by anaerobic membrane bioreactor integrated with partial nitritation-anammox: CO2 reduction and energy recovery
Insights into the carbon neutrality for the treatment process engineering of municipal wastewater by anaerobic membrane bioreactor integrated with partial nitritation-anammox: CO2 reduction and energy recovery
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DOI：
10.1016/j.jwpe.2022.102996
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发表时间：
2022-10
影响因子：
7
通讯作者：
Zhe Kong;Yi Xue;Yanlong Zhang;T. Hao;Hong Chen;Jianliang Sun;Yang Pan;Dapeng Li;Yong Li;Yong Huang
中科院分区：
文献类型：
--
作者：
Zhe Kong;Yi Xue;Yanlong Zhang;T. Hao;Hong Chen;Jianliang Sun;Yang Pan;Dapeng Li;Yong Li;Yong Huang
利用大型中试装置对部分硝化厌氧氨氧化（PN/A）组合厌氧膜生物反应器（AnMBR）的可持续性和碳中和潜力进行了评价。整个中试系统进行了217天的长期连续运行，成功地对低强度真实城市污水进行了有效的碳中和处理，COD去除率达到90%以上。大部分有机物转化为生物甲烷，可作为生物能源或生物燃料回收利用。采用中试一级PN/ a反应器对AnMBR消化废水中的余铵进行了进一步处理。通过与厌氧-缺氧-缺氧（A2/O）工艺的长期运行对比，从节能回收、减少二氧化碳排放、节约城市污水电费等生态和经济角度显示了良好的可行性。应用AnMBR-PN/A工艺，城市污水处理工艺工程能耗降低0.416 kWh/m3，占A2/O工艺能耗的90%。AnMBR-PN/A还能够减少74.9%的二氧化碳排放量。采用AnMBR-PN/A工艺的规模污水处理厂每年可节约电费80万元。这项工作的结果有力地证明了AnMBR-PN/A工艺是一项卓越的可持续技术，也为未来研究中碳中和处理城市污水的概念提供了新的见解。
The promising sustainability and potential in carbon neutrality of the anaerobic membrane bioreactor (AnMBR) integrated with partial nitritation-anammox (PN/A) was assessed using a large pilot-scale plant. The entire pilot-scale system was conducted for a long-term continuous operation of 217 days, succeeding in the effective carbon-neutral treatment of low-strength real municipal wastewater with excellent COD removal efficiency of higher than 90 %. The major proportion of the organic matter was converted into bio-methane which can be recovered as bio-energy or bio-fuel. The residual ammonium contained in the digestate effluent of the AnMBR was further treated by a pilot-scale one-stage PN/A reactor. The long-term operation of the pilot-scale AnMBR was compared with the empirical assumption of the anaerobic-anoxic-oxic (A2/O) process, exhibiting splendid feasibilities in both ecological and economical perspectives including energy conservation and recovery, reduction of CO2emission and electricity expenditure saving for municipal wastewater treatment. The application of AnMBR-PN/A process helps reducing the energy consumption of 0.416 kWh/m3during the wastewater treatment process engineering of municipal wastewater, accounting for 90 % of that for the A2/O. The AnMBR-PN/A is also capable of reducing the CO2emission reduced by 74.9 %. A full-scale wastewater treatment plant implemented with the AnMBR-PN/A process could save the electricity expenditure by 0.80 million CNY annually. The results of this work are solid evidence that the AnMBR-PN/A process is a remarkable sustainable technology, also giving new insights into the concept of carbon-neutral treatment of municipal wastewater in future studies.