净水技术2025，Vol.44Issue(6)：89-99,181,12.DOI:10.15890/j.cnki.jsjs.2025.06.011
慢速生物降解有机碳对污水AAO处理工艺脱氮除磷性能的影响
Effect of Slow Biodegradation of Organic Carbon on Performance of Denitrification and Dephosphorization in AAO Processes for Wastewater Treament
摘要
Abstract
[Objective]The type of influent carbon source directly affects the metabolic pathways and activity of phosphorus accumulating bacteria.However,the mechanism by which the type of organic carbon in the influent affects the wastewater treatment process is unclear.[Methods]Using beef paste as slow biodegradation of organic carbon,this study investigates the influence of the composition of influent carbon sources on the effluent quality,sludge settling performance,and microbial community structure of the anoxic anaerobic/anoxic/oxic(AAO)system.[Results]The result showed that when the influent contained 50 mg/L COD of slow biodegradation of organic carbon,the ammonia nitrogen,TN,and TP in the effluent of the system were 7.15,10.41,4.88 mg/L,respectively.The sludge volume index(SVI)increased from 115.48 mL/g to 210.97 mL/g,and the anaerobic phosphorus release rate and aerobic phosphorus uptake rate in the sequential batch experiment increased from 5.58 mg P/[(g VSS)·h]and 67.26 mg P/[(g VSS)·h]to 2.03 mg P/[(g VSS)·h]and 21.24 mg P/[(g VSS)·h].Microbial community analysis showed that the enrichment of Lactococcus and Propioniclava genera is caused by an increase in slow conversion of organic matter in the influent component.[Conclusion]The slow biological conversion of organic matter into influent alters the characteristics of activated sludge and affects the nitrogen and phosphorus removal performance of AAO systems.关键词
挥发性脂肪酸(VFA)/污泥沉降/生物除磷/慢速生物降解有机碳/脱氮/微生物群落Key words
volatile fatty acid(VFA)/sludge settling/biological phosphorus removal/slow biodegradation of organic carbon/denitification/microbial community分类
建筑与水利引用本文复制引用
狄依超,杨浩,李彭,马艳,黄晓俊,何义亮..慢速生物降解有机碳对污水AAO处理工艺脱氮除磷性能的影响[J].净水技术,2025,44(6):89-99,181,12.基金项目
上海城投水务(集团)有限公司科研项目(KY.WB.23.001) （集团）
