摘要
采用实验室规模连续流厌氧-缺氧-好氧(A/A/O)工艺处理人工模拟生活污水,考察了不同碳氮比(C/N)和溶解氧(DO)工况下改变缺氧池容积对A^2/O工艺脱氮除磷效果的影响。结果表明,在低C/N和好氧阶段DO含量较低时,增大缺氧池容积有利于提高TN的去除率和除磷效率,在COD/ρ(TN)(ρ(TN)≈40 mg/L)约为7,DO的质量浓度在0.9~1.2 mg/L的条件下,缺氧池容积增加1倍,TN去除率可达71.1%,PO4^3--P去除率可达94.0%;在高C/N和好氧阶段DO含量较高时,增大缺氧池容积在提高TN去除率和改善出水水质方面效果不显著。
A laboratory-scale continuous flow anaerobic/anoxic/aerobic(A/A/O)process was used to treat artificial domestic sewage.The effect of changing anoxic tank volume on nitrogen and phosphorus removal efficiency of A2/O process under different carbon nitrogen ratio(C/N)and dissolved oxygen(DO)conditions was investigated.The results showed that increasing the volume of anoxic tank was beneficial to the removal efficiency of TN and phosphorus when C/N was low and DO content was low in aerobic phase.Under the condition of COD/ρ(TN)(ρ(TN)≈40 mg/L)was about 7 and mass concentration of DO at 0.9~1.2 mg/L,the volume of the anoxic pool doubled,the TN removal rate could reach 71.1%,and the PO4^3--P removal rate could reach 94.0%.When the C/N was high and the DO content was high in aerobic phase,increasing the anoxic tank volume had no significant effect on TN removal rate and improvement of effluent quality.
作者
杨雪莲
陈莹
杨文娟
黄婷
朱志华
赵剑强
YANG Xuelian;CHEN Ying;YANG Wenjuan;HUANG Ting;ZHU Zhihua;ZHAO Jianqiang(School of Water and Environment,Chang'an University,Key Laboratory of Underground Subsurface Hydrology and Ecological Effects in Arid Region(Chang an University),Ministry of Education:Xi'an 710054、China;Jiangsu N'SKY Environmental Protection Engineering Co..Ltd,Yixing 214214,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2021年第1期125-129,133,共6页
Technology of Water Treatment
基金
国家自然科学基金(51778057)
宁夏回族自治区重点研发计划(重点)项目(2019BFG02031)。
