基于有机物能源化的自养/异养生物脱氮工艺性能  

Performance of autotrophic/heterotrophic biological nitrogen removal process based on organic energy conversion

作　　者：李伟 李祥[1,2,3] 袁砚 黄勇[1,2] 冯震[4] 李鹏飞 LI Wei;LI Xiang;YUAN Yan;HUANG Yong;FENG Zhen;LI Peng-fei(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment,Suzhou University of Science and Technology,Suzhou 215009,China;Suzhou Tianjun Environmental Technology Co.,LTD.,Suzhou 215000,China;Suzhou Keride Energy Conservation and Environmental Technology Co.,Ltd,Suzhou 215011,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]苏州科技大学江苏水处理技术与材料协同创新中心,江苏苏州215009 [3]苏州天竣环境科技有限公司,江苏苏州215000 [4]苏州科锐德节能环境科技有限公司,江苏苏州215011

出　　处：《中国环境科学》2024年第11期6068-6076,共9页China Environmental Science

基　　金：江苏省水处理技术与材料协同创新中心(XTCXSZ2022-1);国家自然科学基金资助项目(51938010)。

摘　　要：针对厌氧内循环反应器(IC)-缺氧好氧工艺(AO)的传统硝化反硝化脱氮在高有机碳,高氨废水处理过程中能源回收利用率低,脱氮能耗大的问题,设计了IC高效甲烷化,以部分亚硝化/厌氧氨氧化(PN/A)为主的自养脱氮工艺(CANON)处理该类废水,探讨了工程规模下IC-CANON在能源回收和脱氮过程中的运行特性,并评估了其与传统IC-AO能源回收,脱氮稳定性和能耗水平的差异.结果表明,当IC出水C/N 0.5~1时,CANON工艺氮去除速率(NRR)最高达到0.24kg/(m^(3)·d),总氮去除率(NRE)(76.2%±5%),Anammox最小脱氮贡献率在70%以上.当C/N 1.9~4时,一级AO的NRR最高达到0.14kg/(m^(3)·d),NRE为(89.6%±0.9%).当进水氮负荷(NLR)在0.22~0.32kg/(m^(3)·d)波动下,CANON的NRE和Anammox最小贡献率维持在70%和65%以上.当进水C/N增加到2.2时,CANON中Anammox活性被抑制,NRE从76%下降至45.4%,CANON抗NLR冲击能力较强,抗有机负荷冲击能力较差.一级AO在C/N和NLR分别为0.6~6.6kg/(m^(3)·d)和0.06~0.16kg/(m^(3)·d)波动下,NRE维持在90%左右,对比Canon,AO工艺同时具有较好的抗NLR和有机负荷冲击能力.当CANON工艺NRR达到0.21kg/(m^(3)·d)以上,脱氮能耗为3.5~3.6k Wh/kg N,对比相同进出水条件的AO工艺可以节省(77.8%±1.8%),同时IC能源回收率由62.1%增加至89.2%.In order to solve the problems of low energy recovery rate and high energy consumption of traditional nitrification and denitrification in the treatment of high organic carbon and high ammonia wastewater by the anaerobic internal circulation reactor(IC)-anaerobic aerobic process(AO).Based on partial nitrification/anaerobic ammonia oxidation(PN/A),and IC high-efficiency methanation,complete autotrophic nitrogen removal process(CANON)to treat this kind of wastewater was designed,and the operating characteristics of IC-CANON in the energy recovery and nitrogen removal process were discussed,and the differences between IC-CANON and traditional IC-AO energy recovery,nitrogen removal stability and energy consumption level were evaluated.The results showed that when the C/N of IC effluent was 0.5~1,the nitrogen removal rate(NRR)of the CANON process reached the highest of 0.24kg/(m^(3)·d),the nitrogen removal efficiency(NRE)was(76.2±5)%,and the minimum nitrogen removal contribution rate of Anammox was more than 70%.When influent C/N was 1.9~4,the NRR of first AO reached the highest of 0.14kg/(m^(3)·d),and the NRE was(89.6±0.9)%.When the nitrogen load rate(NLR)of influent fluctuated at 0.22~0.32kg/(m^(3)·d),the minimum contribution rates of CANON process NRE and Anammox remained above 70%and 65%,respectively.When the influent C/N increased to 2.2,the activity of Anammox in CANON was inhibited,and the NRE decreased from 76%to 45.4%.CANON had a strong resistance to NLR impact,but a poor resistance to organic load impact.Under the fluctuations of C/N and NLR of 0.6~6.6kg/(m^(3)·d)and 0.06~0.16kg/(m^(3)·d),the NRE of the first AO remained at about 90%,compared with Canon,the AO process had well resistance to NLR and organic load impact at the same time.When the NRR of the CANON process reached more than 0.21kg/(m^(3)·d),the energy consumption of nitrogen removal is 3.5~3.6kWh/kgN,which can save(77.8±1.8)%compared with the AO process under the same influent and effluent,and the IC energy recovery rate increased from 6

关 键 词：硝化/反硝化 部分亚硝化/厌氧氨氧化 启动特性 氮去除速率 稳定性 能耗分析 

分 类 号：X703.1[环境科学与工程—环境工程]