School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China.
School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
Bioresour Technol. 2020 Sep;311:123446. doi: 10.1016/j.biortech.2020.123446. Epub 2020 Apr 25.
Wastewater treatment plants face the problem of a shortage of carbon source for denitrification. Acidogenic fermentation is an effective method for recovering short-chain fatty acids (SCFAs) as a carbon source from sewage sludge. Herein, the most recent advances in SCFAs production from primary sludge and waste activated sludge are systematically summarised and discussed. New technologies and problems pertaining to the improvement in SCFAs availability in fermentation liquids, including removal of ammoniacal nitrogen and phosphate and extraction of SCFAs from fermentation liquids, are analysed and evaluated. Furthermore, studies on the use of recovered SCFAs as a carbon source for denitrification are reviewed. Based on the above summarisation and discussion, some conclusions as well as perspectives on future studies and practical applications are presented. In particular, the recovery of carbon source/bioenergy from sewage sludge must be optimised considering nutrient removal/recovery simultaneously.
污水处理厂面临着反硝化缺乏碳源的问题。产酸发酵是从污水污泥中回收短链脂肪酸（SCFAs）作为碳源的有效方法。本文系统地总结和讨论了从初沉污泥和剩余污泥中生产 SCFAs 的最新进展。分析和评估了提高发酵液中 SCFAs 可用性的新技术和问题，包括氨氮和磷酸盐的去除以及从发酵液中提取 SCFAs。此外，还综述了回收的 SCFAs 作为反硝化碳源的应用研究。基于上述总结和讨论，提出了一些结论以及对未来研究和实际应用的展望。特别是，必须同时考虑营养物质的去除/回收，来优化从污水污泥中回收碳源/生物能。
