三级AO生物接触氧化工艺处理农村生活污水试验
Experimental Study on Degradation of Rural Domestic Sewage by Tertiary AO Biological Contact Oxidation Process
齐晓丹 1杨秀伟 1刘俊良 1李馨娜1
作者信息
- 1. 河北农业大学 城乡建设学院,河北 保定 071001
- 折叠
摘要
为降低农村污水处理的运行成本,探究最适宜农村污水处理的最佳运行条件,采用三级AO生物接触氧化工艺处理农村生活污水,利用自然跌水的方式来补充溶解氧,并对跌水的影响因子进行试验研究.结果表明:在试验环境温度为 24～30℃,pH为 7～8,溶解氧质量浓度为 3.0～3.5 mg/L,辅助曝气量为 500 L/h,最佳水力停留时间为 6h时,化学需氧量(COD)的平均去除率为 88.98%,氨氮的平均去除率为 83.56%,总磷的平均去除率为 77.78%,达到河北省《农村生活污水排放标准》(DB13/2171-2020)一级标准,并结合Box-Behnken响应曲面模型原理,得出三级生物接触氧化工艺的COD去除率模型学方程.
Abstract
In order to reduce the operating cost of rural wastewater treatment,the optimal operating conditions that are most suitable for rural wastewater treatment are investigated.The experiment uses three-stage AO contact oxidation process to treat rural domestic wastewater,and applies natural water fall to supplement dissolved oxygen,and the influence factors of water fall are studied experimentally.Results show that the average removal rate of COD is 88.98%,the average removal rate of ammonia nitrogen is 83.56%and the average removal rate of total phosphorus is 77.78%at the ambient temperature of 24～30℃,pH 7～8,dissolved oxygen is 3.0～3.5 mg/L,the auxiliary aeration is 500 L/h and the optimal hydraulic retention time is 6 h.The average COD removal rate of the three-stage biological contact oxidation process is derived by combining the Box-Behnken response surface model with the primary standard of the Hebei Province"Rural Village Domestic Sewage Discharge Standard"(DB13/2171-2020).
关键词
农村生活污水/接触氧化工艺/跌水曝气/三级反应器/响应曲面模型Key words
rural domestic sewage/contact oxidation process/water drop aeration/three-stage reactor/response surface model引用本文复制引用
基金项目
河北省水利科技计划(2020-55)
河北农业大学理工基金(LG201632)
出版年
2024
NETL
NSTL
万方数据