污泥消化液采用厌氧氨氧化工艺处理的技术实践

Practice of Anaerobic Ammonia Oxidation in Treatment of Sludge Digestion Effluent

污泥中有机物在消化稳定过程中除产生甲烷外,还会将细胞中的氮释放出来,以高浓度氨氮形式存在,浓度为500～800 mg/L。这部分氨氮随污泥脱水压滤液回到污水处理系统,提高约10%～15%的氮负荷,会增加投资和运行费用。设计采用厌氧氨氧化工艺(ANAMMOX)处理污泥消化液,预计氨氮去除率>90%,总氮去除率>75%,可供相关工程参考。

Methane is generated from organic matter and nitrogen in the cells of the microorganisms is released during sludge digestion. Usually the concentration of ammonia nitrogen in the sludge digestion effluent is as high as 500 to 800 mg/L. The ammonia nitrogen produced in sludge digestion remains in the sludge dewatering filtrate and adds 10% to 15% of nitrogen load to the wastewater treatment system, thus increasing the investment and operation cost. Anaerobic ammonia oxidation （ANAMMOX） is applied in the treatment of the sludge digestion effluent. The removal rates of the ammonia nitrogen and the total nitrogen are more than 90% and 75% respectively.