局部循环供氧生物膜技术处理分散污水脱氮除磷分析

发布时间：2019-01-21 09:36

【摘要】：针对现代农业科技示范区污水特点,在处理农村生活污水的"两级回流连续供氧生物膜"工艺基础上设计"两级交替回流局部循环供氧生物膜"工艺,并对该工艺处理分散污水的脱氮除磷效能进行了实际应用研究。系统采用沉淀池和循环池交替回流技术,简化调节池为集水池,改造水解酸化池为水解酸化调节池,在平均处理量100 t/d,水力停留时间(HRT)为2 d的情况下,稳定运行2 a结果表明:工艺对有机污染物、NH_3-N、总氮和总磷的去除率分别为71.6%、64.4%、45.5%和72.0%;出水有机污染物、NH3-N、总氮和总磷的平均质量浓度分别为15.3、9.2、17.2、0.8 mg/L,出水符合城镇污水处理厂污染物排放(GB 18918—2002)一级B标准。进水有机污染物与总氮比值、有机污染物与总磷比值与总磷、有机污染物和NH3-N去除率呈正相关关系,与总氮去除率呈负相关关系。实践证实,该工艺对波动较大的冬季低温期及复杂水质期高冲击、高负荷的特殊分散污水具有较好的脱氮除磷和有机物去除能力。
[Abstract]:In view of the characteristics of sewage in the demonstration area of modern agricultural science and technology, based on the "two-stage backflow continuous oxygen supply biofilm" process for treating rural domestic sewage, the "two-stage alternating reflux partial circulation oxygen supply biofilm" process was designed. The efficiency of denitrification and phosphorus removal by this process was studied. The system adopts the technology of alternate reflux between sedimentation tank and circulating tank, simplifies the regulating tank to be a collecting tank, and transforms the hydrolytic acidizing tank into a hydrolytic acidification regulating tank. Under the condition of average treatment capacity of 100t / d and (HRT) of 2 days, The results of stable operation for 2 years showed that the removal rates of organic pollutants, total nitrogen and total phosphorus of NH_3-N, were 71.6% and 72.0%, respectively. The average mass concentrations of organic pollutants, total nitrogen and total phosphorus of NH3-N, in effluent were 15.3n-2 and 17.2c0. 8 mg/L, respectively. The effluent met the first class B standard of pollutant discharge (GB 18918-2002) of municipal wastewater treatment plant. The ratio of organic pollutants to total nitrogen, the ratio of organic pollutants to total phosphorus, the removal rate of organic pollutants and NH3-N were positively correlated and negatively correlated with the removal rate of total nitrogen. It has been proved that this process has better nitrogen and phosphorus removal and organic matter removal ability for the fluctuating winter low temperature period and complex water quality period, and the special dispersed wastewater with high load has better denitrification and phosphorus removal ability.
【作者单位】：北京林业大学林学院;天津市农业资源与环境研究所;
【基金】：天津市科技支撑项目(14ZCZDNC00019) 天津市农转资金项目(201101037)
【分类号】：X799.3

【相似文献】