折流板生物膜反应器快速启动厌氧氨氧化

摘要

In order to evaluate the feasibility of the fast startup of Anammox process, a lab-scale Anammox baffled biofilm reactor was carried out in this study. The experimental conditions were maintained at temperature (30±2) ℃, DO 0.2-0. 5 mg/L, pH 7. 6-8. 0, average ammonia nitrogen load at 0. 12 kg/( m3·d ) and nitrite nitrogen load at 0.18 kg/( m3·d) , respectively. By taking continuous low strength influent, the start-up process was successfully achieved within 83 days. After the fast startup, the average concentration of effluent NH4+-N, NO2--N and TN were 1.5, 1 and 10 mg/L, respectively. Meanwhile, the average removal efficiencies of NH4+-N, NO2--N and TN reached 95%, 95% and 80%, respectively. The effluent could stably meet the first grade A standards of Urban Sewage Disposal Plant Contamination Integrated Discharge Standard of China (GB 18918-2002). Under the stable phase, the removal rate of NO2--N in each compartment along the reactor gradually decreased, and the remove of NH4+-N presented in some delay.%为研究折流板生物膜反应器快速启动厌氧氨氧化的可行性,在温度(30±2) ℃、DO 0.2~0.5 mg/L、pH 7.6~8.0,平均进水氨氮、亚硝氮负荷分别为0.12和0.18 kg/( m3.d)的条件下,采用低负荷连续进水的方式,启动厌氧氨氧化反应器.经83 d的连续运行,启动成功.成功启动后NH4+-N、NO2--N及TN出水平均质量浓度分别为1.5、1及10 mg/L,NH4+-N、NO2--N的去除率达95%以上,TN去除率达80%以上,出水氮素达到《城镇污水处理厂污染物综合排放标准》( GB18918—2002)一级A标准要求.稳定运行阶段,反应器沿程各单元格中NO-2-N的去除速率逐渐降低,NH4+-N的去除表现出明显的滞后性.