中国环境科学

作者：李伟, 李祥, 袁砚, 黄勇, 冯震, 李鹏飞

单位：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

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

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)

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/(m3·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/(m3·d), and the NRE was (89.6±0.9)%. When the nitrogen load rate (NLR) of influent fluctuated at 0.22~0.32kg/(m3·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/(m3·d) and 0.06~0.16kg/(m3·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/(m3·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 62.1% to 89.2%.

来源：2024年第11期

《中国环境科学》期刊编辑部

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