改良分段进水工艺处理低C/N值污水内循环比优化  

Optimization of Inner Cycle Ratio in Modified Step Feed Process in Treating Municipal Sewage with Low C / N Ratio

作　　者：王伟[1] 陈强[2] 汪传新[3] 彭永臻[2] 

机构地区：[1]黑龙江工程学院土木与建筑工程学院,黑龙江哈尔滨150050 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090 [3]广州市市政工程设计研究院,广东广州510060

出　　处：《中国给水排水》2015年第19期48-52,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51208185);黑龙江省青年科学基金资助项目(QC2011C018);黑龙江省普通高等学校青年学术骨干支持计划项目(1251G053)

摘　　要：采用改良分段进水工艺处理低碳源(C/N值<3)生活污水,考察内循环比对污泥浓度分布、厌氧区NO_x^--N浓度以及除污效果的影响。以实际数据及根据实际数据进行的物料衡算结果作为分析和考察的依据,结果表明:随着内循环比的提高,首段厌氧区的污泥浓度会随之提高,但厌氧区NO_x^--N含量也呈现增高的趋势;内循环比的改变对COD及TN的去除影响不大,系统的SND及微生物同化作用对TN的去除起着至关重要的作用;内循环比的提高减弱了厌氧区聚磷菌的释磷效果,降低了对磷酸盐的去除率。综合考虑系统的脱氮除磷效能,确定最优内循环比为75%,此时系统出水COD、氨氮、TN和磷酸盐浓度分别为46.35、0.23、16.72和1.45 mg/L。The modified step feed process was used to treat municipal sewage with low C/N ratio of less than 3, and the influence of the inner cycle ratio on MLSS distribution, the nitrate nitrogen concen- tration in anaerobic zone and removal effect of pollutants was investigated. The actual data and results of material balance calculation based on the actual data were analyzed, and the results showed that the MLSS concentration in the anaerobic zone increased with the increase of the inner cycle ratio, but the ni- trate nitrogen concentration in the anaerobic zone had an increasing trend too. The change of inner cycle ratio had little impact on the removal of COD and TN, but the removal rate of TN had important relation- ship with SND and microbial assimilation effect. The removal rate of phosphate decreased with the in- creasing of inner cycle ratio due to the weakened phosphorus release effect by the phosphorus-accumula- ting bacteria in the anaerobic zone. Considering the removal effect of nitrogen and phosphorus, the opti-mal inner cycle ratio was 75%, and the effluent concentrations of COD, ammonia nitrogen, TN and phosphate were 46.35 mg/L, 0.23 mg/L, 16.72 mg/L and 1.45 mg/L respectively.

关 键 词：分段进水 内循环比 低碳氮比 脱氮除磷 

分 类 号：X703[环境科学与工程—环境工程]