多级生物膜反应器分段进水方式对脱氮效能影响研究  

INFLUENCE OF STEP-FEED STYLE ON DENITRIFICATION EFFICIENCY IN MULTISTAGE BIOFILM REACTOR

作　　者：周健[1] 窦艳艳[1] 何强[1] 栗静静[1] 陈垚[1] 钟于涛[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《水处理技术》2010年第1期106-109,共4页Technology of Water Treatment

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07315-005);重庆市科技专项(CSTC2006AB7054)

摘　　要：提出多级生物膜反应器,考察了分段进水方式对反应器处理城镇污水生物脱氮效能的影响。结果表明,分段进水点的数量、流量分配及容积分配对反应器脱氮效能的影响显著,分段进水方式有效地提高了碳源利用率以及反应器脱氮效能。在水温为25℃左右,溶解氧为5 mg.L-1,挂膜密度为30%,COD负荷为1.2 kg.m-3.d-1,总氮负荷为0.22 kg.m-.3d-1的条件下,反应器分段进水方式采用第1级、第3级、第6级分段进水,容积分配比为2:3:4,流量分配比为2:2:1时,可使出水COD为38 mg.L-1,出水NH4+-N和TN的质量浓度分别为1.5 mg.L-1和11.1 mg.L-1,去除率分别为80.8%、95.3%和69.2%,与单点进水方式相比TN去除率提高了8.4%。Influence of step-feed style on the efficiency of biological nitrogen removal was studied with multistage biofilm reactor in treating municipal wastewater. Results show that the number of step-feed points, flow distribution and volume distribution has significant effect on denitrification, and step-feed style can effectively improve the utilization ratio of carbon source, and then enhance the denitrification efficiency. Under temperature of 25 ℃, DO of 5 mg· L^-1, biofilm density of 30%, COD loading of 1.2 kg· m^-3· d^-1 and nitrogen loading of 0.22 kg· m^-3· d^-1, with wastewater fed in the 1 st, 3rd and 6th stages, flow distribution ratio of 2：2：1, and volume distribution is 2：3：4 ,the concentrations of COD, NH4^＋-N and TN in effluent are 38 mg·L^-1, 1.5 mg· L^-1 and 11. 1 mg· L^-1 respectively, with removal efficiencies of 80.8%, 95.3% and 69.2% respectively, and the removal efficiency of TN increased by 8.4% compared with single point feed style.

关 键 词：生物膜 分段进水 生物脱氮 

分 类 号：TQ028.8[化学工程] X703.1[环境科学与工程—环境工程]