新型单池系统运行效能及脱氮除磷影响研究

Research on the Effects of Operating Performance and Nitrogen and Phosphorus Removal in a New Single-tank

针对现在生物脱氮除磷工艺同步脱氮除磷效果不佳,构建新型单池系统,试验考察了系统的运行情况。研究了好氧区水力停留时间HRT,污泥龄SRT对系统同步脱氮除磷效能的影响,并提出系统运行的最优控制参数。试验结果表明:新型单池系统具有稳定的COD去除效果,出水COD质量浓度均在50mg/L左右;系统对NH4+-N的去除效果较好,NH4+-N的平均去除率在80%以上。HRT和SRT对系统硝化反应影响明显,当HRT=12h,SRT=15d时,系统对NH4+-N的去除率最高,平均去除率分别为90.25%,91.47%;通过调整HRT和SRT,新型单池系统可以取得较好的磷去除率,当HRT=10h,SRT=10d时,系统对磷的去除率最高,平均去除率分别为83.84%,82.25%。综合COD,NH4+-N,TP的去除效果考虑,系统最佳的HRT为8h,SRT为15d。

A new single-tank was constructed based on simultaneously ineffective nitrogen and phosphorus removal with recent biological nutrient removal technology： The operation of the system was tested, the effects of the nitrogen and phosphorus removal on HRT and SRT in the aerobic zone were researched and the optimal control parameters for the new single-tank were found. The experimental results show that the system has a stable COD removal, the effluent COD is 50 mg/L; the system has a better ammonium rem0val, the average ammonium removal efficiency is over 80M. HRT and SRT have obvious impact on the nitrification, when HRT= 12 h, SRT= 15 d, the system has the best ammonium removal rate, the average removal rates are 90. 25%, 91.47%; The system can achieve better removal of phosphorus by adjusting HRT and SRT, when HRT= 10 h, SRT= 10 d, the system has the best phosphorus removal rate, the average removal rates are 83. 840/60, 82.25%. Considering the removal efficiency of COD, NH4＋-N, TP, the HRT of 8h and SRT of 15d are considered to be optimal under the test conditions.