Feng Yan, Luo Shaoping, Zhang Yingxin, Wang Shuying, Peng Yongzhen
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
Bioresour Technol. 2022 May;351:127003. doi: 10.1016/j.biortech.2022.127003. Epub 2022 Mar 14.
It is a challenging subject to realize nitrogen and phosphorus elimination synchronously from limited-carbon sewage through conventional biological processes. Herein, a novel continuous flow anaerobic/oxic/anoxic/oxic (AOA-O) process, which integrated denitrifying dephosphatation, endogenous denitrification and anammox in the anoxic zone, was developed to enhance nutrient elimination from low carbon/nitrogen sewage (3.4 in average). After the long-term operation (280 days), a satisfactory nutrient removal performance (effluent PO-P: 0.2 mg P/L, total inorganic nitrogen (TIN):8.9 mg N/L) was obtained. Mass balance indicated that anammox contributed to 26.1% TIN removal and denitrifying dephosphatation contributed to 25.6% phosphorus removal, respectively. The cooperation of anammox bacteria retained in biofilms and endogenous denitrifying bacteria in flocculent sludge was responsible for the enhanced nutrient removal in the anoxic zone. Dechloromonas carried out phosphorus uptake both under oxic conditions and anoxic conditions. This study can broaden the application prospect of mainstream anammox.
通过传统生物工艺从低碳污水中同步实现氮和磷的去除是一个具有挑战性的课题。在此，开发了一种新型的连续流厌氧/好氧/缺氧/好氧（AOA-O）工艺，该工艺在缺氧区整合了反硝化除磷、内源反硝化和厌氧氨氧化，以提高低碳/氮污水（平均碳氮比为3.4）中的营养物去除效果。经过长期运行（280天），获得了令人满意的营养物去除性能（出水PO-P：0.2mg P/L，总无机氮（TIN）：8.9mg N/L）。质量平衡表明，厌氧氨氧化分别占TIN去除量的26.1%，反硝化除磷占磷去除量的25.6%。生物膜中保留的厌氧氨氧化细菌与絮凝污泥中的内源反硝化细菌的协同作用是缺氧区营养物去除增强的原因。脱氯单胞菌在好氧和缺氧条件下均能进行磷的吸收。本研究可拓宽主流厌氧氨氧化的应用前景。
