摘要
采用厌氧序批式反应器(ASBR)处理NH4+-N和NO2--N浓度分别为(25. 00±0. 40) mg·L^(-1)和(33. 00±0. 60) mg·L^(-1)的模拟废水,在温度为30℃时,投加乙酸钠控制COD浓度分别为5. 00、15. 00、30. 00和50. 00 mg·L^(-1),研究对厌氧氨氧化启动的影响.结果表明:①4种COD浓度下分别经过74、94、106和129 d均能成功启动厌氧氨氧化. COD浓度为15. 00 mg·L^(-1)和30. 00 mg·L^(-1)时,反应器脱氮性能较好,稳定运行后,平均出水NH4+-N浓度分别为1. 98 mg·L^(-1)和1. 89 mg·L^(-1),平均出水NO2--N浓度低于0. 62 mg·L^(-1),平均出水TN浓度分别为2. 37、2. 28 mg·L^(-1);②启动过程中反硝化对脱氮的平均贡献率逐渐降低至4. 78%、9. 59%、10. 21%和36. 50%,厌氧氨氧化对脱氮的平均贡献率逐渐上升至95. 22%、90. 41%、89. 79%和63. 50%;③厌氧氨氧化活性分别在第44、76、86和114 d时超过反硝化活性,最后分别达到0. 700、0. 690、0. 670和0. 510mg·(g·h)^(-1),反硝化活性分别为0. 110、0. 130、0. 240和0. 410 mg·(g·h)^(-1).该研究结果可为厌氧氨氧化技术在实际工程中的应用提供参考.
An anaerobic sequencing batch reactor(ASBR)was used to treat low-substrate simulated wastewater with NH4+-N and NO2--N concentrations of(25.00±0.40)mg·L-1 and(33.00±0.60)mg·L-1,respectively.The COD concentrations were controlled at 5.00,15.00,30.00,and 50.00 mg·L-1 by adding sodium acetate,and its effects on start-up of anaerobic ammonia oxidation(ANAMMOX)were investigated under the temperature of 30℃.The results showed that①The start-up of ANAMMOX could be achieved successfully after 74,94,106,and 129 days.The nitrogen removal efficiency was optimum when the COD concentration was between 15.00 and 30.00 mg·L-1.In the steady phase,the average effluent concentrations of NH4+-N were 1.98 and 1.89 mg·L-1,the average effluent concentrations of NO2--N were below 0.62 mg·L-1,and the average effluent concentrations of TN were 2.37 and 2.28 mg·L-1.②The average contribution of heterotrophic denitrification to nitrogen removal decreased to 4.78%,9.59%,10.21%,and 36.50%,respectively,during start-up process.The average contribution of ANAMMOX to nitrogen removal gradually increased to 95.22%,90.41%,89.79%,and 63.50%,respectively.③The activities of ANAMMOX exceeded denitrification activities at 44,76,86,and 114 days,respectively,which finally reached 0.700,0.690,0.670,and 0.510 mg·(g·h)-1,and the denitrification activities were 0.110,0.130,0.240 and 0.410 mg·(g·h)-1,respectively.Thus,the research results have provided references for the application of ANAMMOX to engineering.
作者
马艳红
赵智超
安芳娇
黄利
师晓娟
慕浩
陈永志
MA Yan-hong;ZHAO Zhi-chao;AN Fang-jiao;HUANG Li;SHI Xiao-juan;MU Hao;CHEN Yong-zhi(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Lanzhou Railway Design Institute Company Limited,Lanzhou 730000,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2019年第5期2317-2325,共9页
Environmental Science
基金
国家自然科学基金项目(51668033)
甘肃省高等学校特色专业-环境工程项目(101004)
兰州交通大学大学生创新实验项目(2018110)
兰州交通大学青年科学研究基金项目(2015014)
甘肃省自然科学基金项目(18JR3RA126)
作者简介
马艳红(1982~),女,博士研究生,讲师,主要研究方向为水污染控制理论与技术,E-mail:1606944231@qq.com;通信作者:陈永志,E-mail:476411589@qq.com。
