化工环保2026，Vol.46Issue(2)：221-227,7.DOI:10.3969/j.issn.1006-1878.2026.02.010
富磷活性污泥高效释磷及磷回收技术研究
High-efficiency phosphorus release and recovery techniques for phosphorus-rich activated sludge
摘要
Abstract
This study employed alkaline hydrolysis products of sludge as an external carbon source to enhance the anaerobic phosphorus release from phosphorus-rich activated sludge.The study investigated the optimal conditions for alkaline hydrolysis,the promoting effect of the hydrolysis products on phosphorus release,and the efficiency of phosphorus recovery from the anaerobic supernatant via magnesium ammonium phosphate(MAP)crystallization.The recovered product was characterized by SEM,FTIR,and XRD.The experimental results show that the optimal pH for sludge alkaline hydrolysis is 11.0,with a corresponding NaOH dosage of 0.10 g/g TSS.After 120 min of hydrolysis,the supernatant has SCOD of 1 713.1 mg/L and PO4-P concentration of 38.7 mg/L.Using the sludge hydrolyzed under these optimal conditions as the external carbon source,the phosphorus released from the activated sludge reaches 30.1 mg/L after 20 h of anaerobic incubation.Under the conditions of a Mg/P molar ratio of 1.4 and an N/P molar ratio of 1.4,the phosphorus recovery rate from the anaerobic supernatant of the phosphorus-rich sludge via MAP crystallization reaches 79.0%.The characterization results indicate that the primary component of the recovered product is magnesium ammonium phosphate,with a mass fraction of approximately 76%.关键词
富磷污泥/污泥碱解/碳源/厌氧释磷/磷回收Key words
phosphorus-rich sludge/sludge alkaline hydrolysis/carbon source/anaerobic phosphorus release/phosphorus recovery分类
资源环境引用本文复制引用
李典,蒋剑虹,邱顺凡,唐清畅,樊佳..富磷活性污泥高效释磷及磷回收技术研究[J].化工环保,2026,46(2):221-227,7.基金项目
湖南省重点研发计划项目(2023SK2072) （2023SK2072）
长沙市科技重大专项(kh2301023). （kh2301023）
