市政污水人工湿地硫自养反硝化性能研究  

Performance of Sulfur-autotrophic Denitrification in Constructed Wetland for Municipal Wastewater

作　　者：郭启臣[1] 边喜龙[1] 王宇清[1] GUO Qichen;BIAN Xilong;WANG Yuqing(Heilongjiang Institute of Construction Technology,Harbin 150025,China)

机构地区：[1]黑龙江建筑职业技术学院,黑龙江哈尔滨150025

出　　处：《水处理技术》2020年第9期104-107,共4页Technology of Water Treatment

基　　金：黑龙江省高等职业院校高水平骨干专业建设项目(540601)。

摘　　要：以市政污水为底物,建立人工湿地进行硫自养反硝化研究,考察了硫源、硫灰比、微生物密度、温度和NO3--N含量对系统运行性能的影响。结果表明,Na2S2O3作为硫源自养反硝化效率最高,NO3--N去除率为90.9%;在优化硫灰质量比2:1下,系统NO3--N去除率为91.6%;在10×10^3~100×10^6 cell/mL内,微生物密度的提高能够促进人工湿地对NO3--N去除性能;30℃为硫自养反硝化的适宜温度,过低的温度会严重抑制反硝化效率;过高的NO3--N含量会导致ρ(Na2S2O3)/ρ(NO3--N)较低,从而抑制硫自养反硝化效率。The constructed wetlands were established to investigate the sulfur-autotrophic denitrification with municipal wastewater as the substrate.The effect of sulfur source,sulfur/limestone ratio,microbial cell density,temperature and NO3--N content on system operation performance was studied.The results showed that,when Na2S2O3 as sulfur source,the autotrophic denitrification efficiency was the highest and the NO3--N removal rate was 90.9%.At optimum sulfur/limestone mass ratio of 2:1,the NO3--N removal rate was 91.6%.The higher microbial cell density could lead to the higher NO3--N removal rate by constructed wetlands in the range of 10×10^3~100×10^6 cell/mL.Low temperature would significantly inhibit the sulfurautotrophic denitrification efficiency and the 30℃was the optimal temperature for sulfur-autotrophic denitrification.The exorbitant of NO3--N content would result in the decrease ofρ(Na2S2O3)/ρ(NO3--N),subsequently inhibited sulfur-autotrophic denitrification efficiency.

关 键 词：市政污水 人工湿地 硫自养反硝化 硫源 

分 类 号：X703.1[环境科学与工程—环境工程]