摘要
作为全程自养脱氮(completely autotrophic nitrogen removal over nitrite,CANON)工艺中间产物,羟氨(hydroxylamine,NH_(2)OH)可能对CANON工艺产生重要影响。为研究NH_(2)OH对于CANON工艺中短程硝化及脱氮性能的影响,利用稳定运行的移动床式生物膜反应器(moving-bed biofilm reactor,MBBR)进行批次实验,控制进水NH_(4)^(+)-N质量浓度为230 mg·L^(-1),添加NH_(2)OH质量浓度分别为0、5、20、80 mg·L^(-1),研究了添加不同质量浓度的NH_(2)OH对CANON工艺的影响。结果表明,NH_(2)OH质量浓度越高,越有利于CANON工艺中亚硝酸盐氧化菌(nitrite oxidizing bacteria,NOB)的抑制。当NH_(2)OH质量浓度≤20 mg·L^(-1)时,提高NH_(2)OH质量浓度,有利于提高NH_(4)^(+)-N的降解速率;当NH_(2)OH质量浓度为20 mg·L^(-1),NH_(4)^(+)-N降解速率可以提高29.4%。从总体脱氮效果来看,NH_(2)OH的添加会提高CANON的脱氮性能,建议将NH_(2)OH投加质量浓度控制在5 mg·L^(-1)为宜。
As an intermediate product in completely autotrophic nitrogen removal over nitrite(CANON)process,hydroxylamine(NH_(2)OH)may have a great effect on CANON process.A batch experiment was carried out by using a moving-bed biofilm reactor(MBBR)with stable operation to study the effect of NH_(2)OH concentration on the short-cut nitrification and nitrogen removal performance of CANON process.The influent NH_(4)^(+)-N concentration was controlled at 230 mg·L^(-1),and the concentrations of NH_(2)OH addition were 0,5,20,and 80 mg·L^(-1),respectively.The results showed that the higher the concentration of NH_(2)OH,the more beneficial to the inhibition of nitrite oxidizing bacteria(NOB)in CANON process.When the NH_(2)OH concentration was less than or equal to 20 mg·L^(-1),the increase of the concentration of NH_(2)OH was beneficial to the increase of NH_(4)^(+)-N degradation rate.When the NH_(2)OH concentration was 20 mg·L^(-1),the degradation rate of NH_(4)^(+)-N increased by 29.4%.In the view of the total nitrogen removal effect,the addition of NH_(2)OH could increase the nitrogen removal performance of CANON process,and the concentration of NH_(2)OH addition could be controlled at 5 mg·L^(-1).
作者
付昆明
靳怡然
李慧
吴青
刘永剑
李飞
FU Kunming;JIN Yiran;LI Hui;WU Qing;LIU Yongjian;LI Fei(Sino-Dutch R&D Center for Future Wastewater Treatment Technologies,Key Laboratory of Urban Storm Water System and Water Environment,Ministry of Education,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Water Design Group Company Limited,Jinan 250000,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2021年第6期2100-2107,共8页
Chinese Journal of Environmental Engineering
基金
北京建筑大学市属高校基本科研业务费专项(X20136)。
