摘要
污泥消化液为高氨氮、低C/N比、低碱度的废水,用传统生物脱氮方法处理消化液,存在碳源和碱度不足的双重障碍.本实验在"A/O+SIFEDEN"组合系统中,首先在A/O反应器中实现消化液短程硝化,其出水与初沉污泥在SIFEDEN中同步实现消化液短程脱氮和污泥减量,消化液的TN去除率可达87%,MLVSS去除率为49%左右.考察了SIFEDEN反应器中污泥发酵和污水反硝化的互惠关系、pH值的变化规律等.该系统出水回流到污水厂主流区,不会降低进水C/N,污水厂的脱氮除磷效率得以提高.
External carbon source and alkalinity need to be supplied for nitrogen removal from digestion liquid with high concentrations of ammonia,low C/N ratio and low concentrations of alkalinity by traditional nitrogen removal technologies.In this investigation,a novel system consisted of an A/O reactor and SIFEDEN（SImultaneous FErmentation and DENitrification） reactor was used for nitrogen removal from digestion liquid.Firstly,nitritation of digestion liquid was finished in the A/O reactor.Secondly,nitrite and nitrate in effluent of the A/O reactor were removed in the SIFEDEN reactor by using primary sludge hydrolyzed and fermented as carbon sources.Total nitrogen removal efficiency of digestion liquid was about 87% and volatile suspended solid（VSS） of primary sludge was decreased by about 49%.The reciprocal relation between sludge fermentation and digestion liquid denitrification and variation of pH in the SIFEDEN reactor were investigated.When effluent of the system was reflowed into mainstream of wastewater treatment plant after accomplishing highly effective siding nitrogen removal,the C/N ratio of raw municipal wastewater was not decreased to improve nitrogen removal efficiency of municipal wastewater.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2011年第1期19-24,共6页
China Environmental Science
基金
"十一五"国家重大科技专项课题(2008ZX07314-008)
"十一五"国家科技支撑计划重点项目(2006BAC19B01)
北京市自然科学基金资助项目(09H0002)
关键词
消化液
脱氮
A/O+SIFEDEN
污泥发酵同步反硝化
污泥减量
digestion liquid
nitrogen removal
A/O＋SIFEDEN
simultaneous fermentation and denitrification
sludge decrease
