外加碳源对好氧颗粒污泥强化低碳氮比污水脱氮效果  

Denitrification Effect of External Carbon Source Dosing for Aerobic Granular Sludge on Enhanced Low C/N Wastewater Treatment

作　　者：李正昊 曾敏静 陈月茹 程媛媛[1] 吴俊峰 龙焙[1] LI Zhenghao;ZENG Minjing;CHEN Yueru;CHENG Yuanyuan;WU Junfeng;LONG Bei(School of Civil and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Henan Key Laboratory of Water Pollution Prevention and Rehabilitation,Pingdingshan 467036,China)

机构地区：[1]江西理工大学土木与测绘工程学院,江西赣州341000 [2]河南省水体污染防治与修复重点实验室,河南平顶山467036

出　　处：《净水技术》2023年第9期80-87,175,共9页Water Purification Technology

基　　金：国家自然科学基金项目(52060007);江西省教育厅科技项目(GJJ190502);江西理工大学研究生创新专项资金项目(XY2021-S024);江西省大学生创新训练计划项目(S202110407051);河南省水体污染防治与修复重点实验室开放基金(CJSP2021004)。

摘　　要：文章探索了好氧颗粒污泥(AGS)处理低碳氮比污水的脱氮效果。在搅拌(50 min)-曝气(210 min)-搅拌(100 min)运行模式下,随着碳氮比(3.0降至0.9)的减小,氨氮去除率保持在89.28%以上,亚硝态氮及硝态氮逐渐积累,总无机氮(TIN)去除率呈下降趋势(37.56%~56.48%)。在此基础上,研究探索了在260~360 min的缺氧段内外投碳强化AGS脱氮效果。投加碳源后,各批次试验中AGS反硝化效果得到明显改善,氨氮去除率维持在85%以上,亚硝态氮及硝态氮下降明显,TIN去除率增大至78.06%~97.64%。相比于德国单段活性污泥污水处理厂设计规范(ATV-DVKA131E)中推荐的碳源投加量,减少65%和30%推荐碳源投加量下,AGS系统仍可去除78.06%~93.08%及86.47%~97.64%的TIN。The nitrogen removal performance of AGS for the treatment of low C/N wastewater was explored.Under stirring(50 min)-aeration(210 min)-stirring(100 min)operation mode,with the decrease of C/N(3.0 to 0.9),the ammonia nitrogen removal efficiency remained above 89.28%,nitrite nitrogen and nitrate nitrogen gradually accumulated,and the total inorganic nitrogen(TIN)removal efficiency showed a downward trend(37.56%to 56.48%).On this basis,denitrification of AGS was enhanced by dosing external carbon source in the anoxic phase(260~360 min).The denitrification performances of AGS were significantly improved in each batch test after dosing carbon source:the ammonia nitrogen removal efficiency was always more than 85%,nitrite nitrogen and nitrate nitrogen decreased significantly,and the TIN removal efficiency increased to 78.06%~97.64%.The AGS system removed 78.06%~93.08%and 86.47%~97.64%of the TIN when the recommended carbon source dosage in German ATV standard(ATVDVKA131E)was reduced by 65%and 30%.

关 键 词：好氧颗粒污泥 碳氮比 硝化 反硝化 外加碳源 

分 类 号：X703[环境科学与工程—环境工程]