高原地区MBR一体化曝气优化与脱氮除磷研究

Study on Optimization of MBR Integrated Aeration Conditions in Plateau Areas and Its for Nitrogen and Phosphorus Removal

针对高原地区MBR一体化技术脱氮除磷效果不佳与系统运行关键参数方面存在的问题,以贵州草海一座采用MBR技术的污水站为对象,探究运行优化曝气量以及运行4个月的脱氮除磷效果。结果表明,缺氧区、好氧区的优化曝气量分别为20、120 m3/h,该曝气量工况下COD、NH_(4)^(+)-N、TN、TP去除率分别为93.72%、95.87%、69.32%、88.57%。在优化曝气工况运行下,3-6月份出水COD和NH_(4)^(+)-N、TN、TP的质量浓度平均分别为10.96 mg/L和1.76、10.51、0.36 mg/L。出水TN含量在3月份出现2次超标,TP含量在3月份出现3次超标,其余指标均可达到GB18918-2002的一级A标准。可为采用MBR工艺的污水处理厂在低温低压低氧环境运行提供参考。

Aimed at the poor effect of MBR integrated technology for nitrogen and phosphorus removal in plateau areas and the problems in key parameters of system operation, an MBR sewage station in Caohai, Guizhou Province, was taken as the object to explore the optimal aeration rate and the nitrogen and phosphorus removal effect for four months. The results showed that, the optimal aeration rate in anoxic and aerobic zone was 20 m3/h and 120 m3/h, respectively, the removal rates of COD, NH_(4)^(+)-N, TN and TP were 93.72%, 95.87%, 69.32% and 88.57% under optimal aeration rate,respectively. Under optimal aeration conditions, the average mass concentration of COD, NH_(4)^(+)-N, TN and TP were 10.96 mg/L, 1.76 mg/L, 10.51 mg/L and 0.36 mg/L respectively. The TN content of effluent exceeded the standard twice in March, and the TP content exceeded the standard three times in March, the rest of the indicators could reach the first level A standard of GB 18918-2002. It can provide a reference for the operation of sewage treatment plants using MBR technology in a low temperature, low pressure and low oxygen environment.