摘要
针对传统脱氮除磷工艺存在的占地面积大、运行成本高等问题,将短程硝化与反硝化除磷工艺相结合而构建了两段SBR双污泥短程硝化反硝化除磷工艺。在成功启动短程硝化反应器后,亚硝酸盐氮的积累率达到94.23%,系统对氨氮的平均去除率>95%;在以亚硝酸盐氮为电子受体的反硝化除磷菌培养驯化阶段,吸磷率达到了64.44%,同时NO2--N由17.79 mg/L降低为0.05 mg/L,电子受体被完全消耗,基本达到了以NO2--N为电子受体进行反硝化聚磷菌富集的目的。在此基础上,考察了N/P值对系统脱氮除磷效果的影响。结果表明,当N/P为3.0、2.2、1.7时对COD和氨氮的去除效果均较好,对COD的去除率分别为90%、89%、90%,对氨氮的去除率分别为96%、95%和96.7%;当N/P为3.0和2.2时除磷效果良好,平均去除率分别达到了88.5%和91%;而当N/P为1.7时除磷效果明显下降,仅为75.6%。
Traditional nitrogen and phosphorus removal processes have large land occupation and high operation cost. In response to the problems, shortcut nitrification and denitrifying phosphorus removal processes were combined by using SBR reactor to realize shortcut nitrification/denitrifying phosphorus removal in a two-stage two-sludge system. During shortcut nitrification, the nitrite nitrogen accumulation rate can reach 94.23% , and the average ammonia nitrogen removal rate is above 95%. When using nitrite nitrogen as electron acceptor to culture denitrifying phosphate accumulating organisms（DNPAOs）, the uptake rate of phosphorus can reach 64.44%, at the same time, NO^-2 - N is reduced from 17.79 mg/L to 0.05 mg/L, and electron acceptor is completely consumed. A basic enrichment of DNPAOs is achieved by using NO^-2 - N as electron acceptor. Based on this, the effect of N/P ratio on nitrogen and phosphorus removal was investigated. The results show that the removal rates of COD and ammonia nitrogen under N/P ratios of 3.0, 2.2 and 1.7 are good, the COD removal rate is 90% , 89% and 90% , and the ammonia nitrogen removal rate is 96%, 95% and 96.7% respectively. At N/P ratios of 3.0 and 2.2, the phosphorus removal rate is 88.5% and 91%. However, the phosphorus removal rate is 75.6% when the N/P ratio is 1.7.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第17期31-34,共4页
China Water & Wastewater
基金
教育部全国优秀博士学位论文专项基金资助项目(2005044)
教育部新世纪优秀人才资助计划项目(NCET-05-0330)
关键词
短程硝化
反硝化除磷
N/P值
SBR
shortcut nitrification
batch reactor （SBR） denitrifying phosphorus removal
N/P ratio
sequencing
