生态与农村环境学报2025，Vol.41Issue(5)：669-677,9.DOI:10.19741/j.issn.1673-4831.2024.0444
两段式亚硝化-厌氧氨氧化工艺处理沼液的运行特性研究
Study on the Operation Characteristics of Biogas Slurry Treatment by Two-stage Nitrosation-anaerobic Ammoni-um Oxidation Process
摘要
Abstract
Two-stage nitrosation-anaerobic ammonium oxidation process can solve the problem of poor biodegradability of digested effluent and improve the ability of ammonia nitrogen(NH4+-N)and total nitrogen(TN)removal.In this study,the method of gradually increasing the digested effluent in the influent of anammox process was used to domesticate and en-rich anammox bacteria.Then,the operating characteristics of the nitrosation and anammox stages in the starter and opera-tion periods were studied using digested effluent as the treatment agent.The anaerobic ammonia oxidation reactor was suc-cessfully started up in about 117 days,which greatly shortened the start-up time.Meanwhile,it was found that the ratio of NH4+-N/NO2--N(nitrite nitrogen)in the influent is an important factor affecting the operation performance of the anaero-bic ammonia oxidation reactor.The effects of nitrosation and anammox stages on chemical oxygen demand(COD)and ni-trogen removal are inconsistent:the nitrosation stage accounted for 82％of the COD removal in the two-stage process,while the anammox stage had almost no effect on the COD removal.From the perspective of N flow direction,the nitrosati-on section mainly transforms N,but had almost no effect on TN removal.Moreover,the anaerobic ammonia oxidation sec-tion played a major role in TN removal.The average TN removal rate is 72.42％,and the contribution of the TN removal rate in the system is 96.40％.During the operation of the two-stage system,the overall average NO2--N consumption ratio was close to the theoretical value due to the trace amount of dissolved oxygen,but the lack of a carbon source led to a sig-nificant increase in the NO3--N production ratio.This,in turn,made the apparent NH4+-N consumption in the anaerobic ammonia oxidation section∶NO2--N consumption∶NO3--N production=1∶1.34∶0.39,which is different from the theoretical value of 1∶1.32∶0.26.关键词
沼液/亚硝化/厌氧氨氧化/运行特性Key words
biogas slurry/nitrosation/anaerobic ammonium oxidation/operating characteristics分类
资源环境引用本文复制引用
刘俊,姚冬杰,周淼,杨卫华,艾平,雷陈澳,王媛媛..两段式亚硝化-厌氧氨氧化工艺处理沼液的运行特性研究[J].生态与农村环境学报,2025,41(5):669-677,9.基金项目
国网湖北电科院2023年农村能源革命综合服务平台运营支撑服务(B31532232975) （B31532232975）
