摘要
基于高原环境下的AAO工艺,研究水力停留时间(HRT)对AAO工艺脱氮除磷的影响,根据《城镇污水处理厂污染物排放标准》(GB 18918—2002)对化学需氧量(COD_(Cr))、氨氮、总氮(TN)、总磷(TP)4个水质指标进行分析。结果表明:最佳HRT为15.00 h,出水COD_(Cr)、氨氮、TN浓度均满足一级A排放标准,出水TP浓度满足二级排放标准;HRT对COD_(Cr)、氨氮的去除率影响小,对TN、TP的去除率影响大,TN的去除率随HRT的增加呈先增后减趋势,而TP的去除率随HRT的增加呈先减后增的趋势。同时,温度、紫外线等对AAO工艺脱氮除磷有重要影响。
Based on the AAO process under plateau environment,the effect of hydraulic retention time(HRT)on nitrogen and phosphorus removal by AAO process was studied.Four water quality indices,including chemical oxygen demand(COD_(Cr)),ammonia nitrogen,total nitrogen(TN)and total phosphorus(TP),were analyzed according to Discharge Standard of Pollutants for Municipial Wastewater Treatment Plant(GB 18918-2002).Results showed that the optimal HRT was 15.00 h,and the effluent COD_(Cr),ammonia nitrogen and TN mass concentrations all meet first class A discharge standard,and the effluent TP mass concentration meet second-level discharge standard.HRT had little effect on removal rate of COD_(Cr)and ammonia nitrogen,but had great effect on removal rate of TN and TP.The removal rate of TN first increased and then decreases with increase of HRT,while removal rate of TP first decreased and then increased with increase of HRT.At the same time,temperature,ultraviolet light,etc.had an important influence on nitrogen and phosphorus removal of AAO process.
作者
尤俊豪
郭明哲
宗永臣
郝凯越
黄德才
YOU Junhao;GUO Mingzhe;ZONG Yongchen;HAO Kaiyue;HUANG Decai(Water Conservancy Project&Civil Engineering College,Tibet Agriculture&Animal Husbandry University,Linzhi860000,China;Civil,Hydraulic and Electric Engineering Technology Research Center of Tibet,Linzhi860000,China)
出处
《净水技术》
CAS
2022年第10期56-60,91,共6页
Water Purification Technology
基金
国家自然科学基金项目(51868069)
西藏地区自然基金项目(XZ2018ZRG-20)
西藏自治区高等学校科研创新团队“高原水环境保护与水生态安全”
西藏农牧学院研究生教育创新计划项目(YJS2021-26)。
关键词
高原环境
污水处理
AAO
工艺
脱氮除磷
水力停留时间(HRT)
plateau environment
sewage treatment
AAO process
nitrogen and phosphorus removal
hydraulic retention time(HRT)
