厌氧氨氧化技术处理热水解消化液的实验研究

Study on treatment of thermal hydrolysis anaerobic digester effluent by anaerobic ammonia oxidation technique

通过厌氧氨氧化技术处理热水解污泥消化液,在不投加任何化学药剂的条件下实现氨氮与总氮的同步去除,通过原水稀释启动或原水直接启动方式均可实现IFAS厌氧氨氧化工艺的启动,系统总氮去除负荷为0.25~0.3kg N/(m3·d),总氮去除率在70%~80%,经臭氧氧化工艺预处理后,IFAS厌氧氨氧化工艺的总氮去除率与去除负荷均有一定幅度的提高.通过分子生物学检测发现,系统内AOB主要存在于絮体污泥内,而对溶解氧耐受能力较低的An AOB则主要分布在生物膜上.

TH-ADE was treated by anaerobic ammonia oxidation(ANAMMOX)technique with no chemical agent added to remove ammonia nitrogen and total nitrogen simultaneously.Two methods including raw TH-ADE and dilution technique could achieve the purpose of start-up of the Integrated Fixed-Film Activated Sludge Systems(IFAS)reactor,total nitrogen removal rate and efficiency were0.25~0.3kgN/(m3·d)and70%~80%respectively.With ozone oxidation pretreatment,total nitrogen removal rate and efficiency had a certain range of increase in the IFAS reactor.Microorganism had a spatial distribution detected by molecular biological technology,ammonia oxidizing bacteria(AOB)mainly existed in the floc sludge,and anaerobic oxidizing bacteria(AnAOB)which had low tolerance to dissolved oxygen mainly distributed in the biofilm packing.