摘要
设计了1种竖流式一体化反应器用于处理乡镇生活污水,该反应器将原本A2/O工艺中单独设置的厌氧区、缺氧区、好氧区和沉淀区整合为一体,实验考察了HRT和好氧区DO含量对处理效果的影响。结果表明,4组好氧区HRT分别为6、8、10、12 h时,COD、NH3-N、TN、TP的去除率分别为69%~81%、77%~87%、74%~81%、73%~82%;当好氧区DO的质量浓度分别为1.5、2.5、3.5 mg/L时,COD、NH3-N、TN、TP的去除率分别为69%~79%、76%~84%、72%~79%、74%~79%。综合考虑处理效果和成本,HRT为8 h、DO的质量浓度2.5 mg/L时较为适合,此时出水COD、NH3-N、TN、TP均可满足GB 18918-2002污水排放一级A标准。该竖流式一体化反应器具有结构紧凑、占地面积小等特点。
Avertical flow integrated reactor was used to treat township domestic sewage. The reactor integrated the anaerobic zone, anoxic zone, aerobic zone and sedimentation zone which separately set up in the original A2/O process, the effect of H RT and DO content in aerobic zone on the treatment efficiency were investigated. The results showed that the removal rates of COD , NH3-N, TN and TP were 69 %-81%, 77%-87%-74%-81 %, 73 %.82 % respectively in the four sets of HRT conditions (6 h, 8 h, 10 h, 12 h). When mass concentration of DO in aerobic zone was 1.5 mg/L, 2.5 mg/L and 3.5 mg/L, the removal rates of COD, NH3-N,TN and T P were 69 %.79%, 76 %-84%,72 %-79 % and 74 %.79%, respectively. Considering the treatment effect and cost, the optimum operation parameters were as follow, HRT was 8 h and mass concentration of DO was 2.5 mg/L,the COD , NH 3-N, TN and TP could meet the first level Astandard of sewage discharge of GB 18918.2002.
作者
肖炘圻
陈鑫
周伟
龙云川
胡菁
周少奇
XIAO Xinqi;CHEN Xin;ZHOU Wei;LONG Yunchuan;HU Jing;ZHOU Shaoqi(College of Resource and Environmental Engineering, Guizhou University,Guiyang 550025,China;LVDI Environmental Technology Co., Ltd., Guiyang 550000,China;Guizhou Academy of Sciences, Guiyang 550001,China;School of environment and energy,South China University of Technology,Guangzhou 510006,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2019年第8期116-119,124,共5页
Technology of Water Treatment
基金
国家重点研发计划项目资助（2016YFC0400702）
中央引导地方科技科技发展专项资金（黔科中引地[2018]4005）
贵州省科技计划项目（黔科合平台人才2017[5409]）
关键词
乡镇污水
竖流式一体化反应器
水力停留时间
好氧区溶解氧
Township sewage
vertical flow integrated reactor
hydraulic retention time
dissolved oxygen in aerobic zone
