摘要
无碳源投加下采用增设分段回流的多级AO工艺处理市政污水,并借助模拟缺氧池反硝化小试试验和缺氧池氧化还原电位(ORP)分析优化工艺参数。结果表明,工艺优化后,在分段回流至一级/二级缺氧池(A1、A2)的内回流比为50%、50%、进水分配比为7∶3及一级/二级好氧池(O1、O2)的DO为0.3、1.5 mg/L的参数下,出水水质达到了“苏州特别排放限值”要求(TN为6~9 mg/L)并低碳运行;工艺A1/A2反硝化微环境良好,ORP分别为-30、-15 mV,且在O1/O2中发现了明显同步硝化反硝化作用;系统中优势菌属为norank_f_Saprospiraceae、Dokdonella、Trichococcus,反硝化菌属相对丰度由21.48%增至51.82%;对比其他提标改造工艺,该工艺能耗低,在减污降碳协同增效方面具有优势。
Under the condition of no carbon source dosing,a multistage AO process with segmented reflux was used to treat municipal wastewater,and the process parameters were optimized by means of the simulated anoxic tank de⁃nitrification pilot test and analysis of the oxidation reduction potential(ORP)of the anoxic tank.The results showed that after the process optimization,under the parameters of internal reflux ratio(50%,50%),influent distribution ratio(7∶3)and DO(0.3 mg/L,1.5 mg/L)of the primary/secondary aerobic tank(O1/O2),the effluent met the requirements of“Suzhou special emission limit”(TN 6-9 mg/L)and operated with low carbon.The denitrification microenviron⁃ment of process A1/A2 was good,with ORP of-30,-15 mV,respectively,and obvious simultaneous nitrification and denitrification was found in O1/O2.The dominant bacteria in the system are norank_f_saprospiraceae,Dok⁃donella,Trichococcus,and the relative abundance of denitrifying bacteria increased from 21.48%to 51.82%.Com⁃pared with other upgrading and reconstruction processes,this process had low energy consumption and had advan⁃tages in reducing pollution and carbon.
作者
吴亚辉
潘杨
WU Yahui;PAN Yang(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology,Suzhou 215009,China)
出处
《工业水处理》
北大核心
2025年第8期128-137,共10页
Industrial Water Treatment
基金
江苏省重点研发计划(社会发展)项目(BE2021658)
苏州市科技发展计划(社会发展科技创新)项目(2022SS17)。
关键词
多级AO工艺
生物脱氮
工艺优化
multistage AO process
biological nitrogen removal
process optimization
作者简介
第一作者:吴亚辉(1997—),硕士研究生,E-mail:yahui-wu@outlook.com;通讯作者:潘杨,教授,E-mail:panyang863@sina.com。
