分层MBBR处理合成氨废水的生物膜驯化试验研究

摘要

利用自建的分层悬浮填料移动床生物膜反应器(MBBR)处理模拟合成氨废水,考察了填料生物膜驯化过程中生物相的变化和反应器内基质浓度的降解情况.试验结果表明:当废水中NH3-N、CODCr和硫化物的质量浓度分别达到400、2 800和3 mg/L时,出水中的质量浓度分别为90、200和0.46 mg/L,基本达到GB 13458-2001《合成氨工业水污染物排放标准》的要求,去除率分别达到78％、93％和85％.与不分层MBBR对NH3-N和COD.的去除率(70％和89％)相比较,分层MBBR的去除效果有较大程度的提高.%A homemade layered suspended filler moving bed biofilm reactor(MBBR) was used to treat simulant synthetic ammonia wastewater. The changes of the biological phase of the biofilm and the degradation of the substrate in the reactor during the biofilm domestication process were investigated. The results of the test showed that, when the mass concentration of NH3-N, CODCr and sulfide in the wastewater were 400, 2 800 and 3 mg/L respectively, after the treatment, the corresponding indexes of the effluent water were 90, 200 and 0.46 mg/L respectively, and the removal rates reached 78%, 93% and 85% respectively, which met the requirement of GB 13458-2001 Discharge Standard of Water Pollutants for Ammonia Industry. Compared with the removal rates of NH3-N (70%) and CODCr (89%) by traditional MBBR, the removal rates by layered MBBR were obviously higher.