三相生物流化床处理低C/N污水的亚硝化过程控制研究  

NITROSATION PROCESS CONTROL IN LOW C/N WASTEWATER TREATMENT BY THREE-PHASE BIOLOGICAL FLUIDIZED BED

作　　者：袁秋生[1] 

机构地区：[1]徐州工业职业技术学院化学工程技术学院,江苏徐州221140

出　　处：《环境工程》2015年第1期62-66,共5页Environmental Engineering

摘　　要：将短程硝化与生物流化床相结合,采用低碳氮比的人工合成污水进行启动,考察进水COD、氨氮、DO、p H对硝化和亚硝化过程的影响。研究表明,较短的水力停留时间(HRT)和较少的接种污泥量有利于生物膜的生长,能够成功实现生物流化床的快速启动。高进水氨氮浓度有助于反应器实现亚硝酸盐的积累,但是这种积累并不稳定。当反应器中p H为7.5~8.1,ρ(DO)为1.5~2.5 mg/L时,最大亚硝化率达到75%左右,氨氮去除率达85%以上。出水NO-2-N和NO-3-N浓度随进水COD浓度的增加而减少;当进水COD浓度为50 mg/L时,出水硝酸盐浓度急剧减少,亚硝酸盐浓度有所降低,反应器发生同步硝化反硝化脱氮现象。Combined with partial nitrification and biological fluidized bed,The process was started with low C / N synthetic wastewater,and the influence on the nitration and nitrosation process was studied by the concentration of COD,ammonia nitrogen,DO and p H in sewage. The study showed that a shorter HRT and less seed sludge was better for the growing of biofilm,and could successfully realize the fast start of biological fluidized bed. High concentration of ammonia nitrogen in influent could contribute to the accumulation of nitrite in reactor,but this accumulation was not stable. When p H in reactor was around 7. 5 ~ 8. 1,amd DO was about 1. 5 ~ 2. 5 mg / L,the maximum rate of nitrosation could reach 75%,and the ammonia nitrogen removal rate was more than85%. The concentration of NO-2-N and NO-3-N in effluent decreased with the increasing concentration of COD in influent. When the concentration of COD in influent was 50 mg / L,the concentration of nitrate reduced sharply and the concentration of nitrite reduced slowly,nitrogen removal by simultaneous nitrification and denitrification occurred in reactor.

关 键 词：三相生物流化床 低C/N 亚硝酸盐 短程硝化 氨氮 

分 类 号：X703.1[环境科学与工程—环境工程]