摘要
进水碳源匮乏是我国污水厂普遍面临的棘手问题,尤其是进水中可快速降解有机物(rbCOD)或短链脂肪酸(SCVFAs)不足,往往导致生物系统脱氮除磷效率低下和出水水质不稳定。近些年快速发展的活性污泥水解技术实现了污水厂"内碳源"的可持续利用,采用侧流活性污泥水解(SSH工艺)或者混合液在线水解(UMIF)工艺,使活性污泥在厌氧或缺氧环境下进行水解发酵产生rbCOD或SCVFAs,发酵产物再补充到污水厂进水进而实现无外加商业碳源情况下的强化脱氮除磷。结合工程实例,介绍了活性污泥水解技术在工艺选择、运行特性及影响因素、水解潜力及水解产物等方面的热点问题,以期为国内在开发活性污泥可持续性利用技术方面提供借鉴。
Lack of influent carbon source is an intractable problem faced by wastewater treatment plants in China. Especially, shortage of readily biodegradable COD （rbCOD） and short-chain volatile fatty acids （SCVFAs） in the influent often results in low efficiency of nitrogen and phosphorus removal and instability of the effluent. Sustainable utilization of internal carbon source has been achieved with rapid development could be produced of activated sludge hydrolysis technology in recent years. The rbCOD and SCVFAs by the activated sludge hydrolysis and fermentation under anaerobic or anoxic condition with side-stream activated sludge hydrolysis （SSH） process or un-mixed in-line fermenter （UMIF） process. The enhanced nitrogen and phosphorus removal could be achieved by adding fermentation prod- uct to the influent and without adding commercial carbon source. The process selection, operation characteristics, influencing factors, hydrolysis potential and products were introduced with two typical cases to provide a reference for developing sustainable utilization technologies of activated sludge in China.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第4期12-16,共5页
China Water & Wastewater
关键词
活性污泥水解
混合液发酵
挥发性脂肪酸
强化脱氮除磷
低进水浓度
activated sludge hydrolysis
mixed liquor fermentation
VFA
enhanced nitrogen and phosphorus removal
low influent concentration
