生物膜处理无机氨氮废水及其好氧反硝化现象  

TREATMENT OF INORGANIC AMMONIA NITROGEN WASTEWATER BY BIOFILM AND ITS AEROBIC DENITRIFICATION PHENOMENON

作　　者：李沛霖[1] 李大平[2] 何晓红[2] 王晓梅[2] 高平[1] 

机构地区：[1]四川大学生命科学学院,四川成都610064 [2]中国科学院成都生物研究所,四川成都610041

出　　处：《水处理技术》2007年第2期42-45,共4页Technology of Water Treatment

基　　金：中国科学院知识创新工程重要方向项目(KSCX2-SW-114)

摘　　要：从某油田外排水中富集、分离的自养氨氧化菌经培养、挂膜获得自养氨氧化生物膜。探讨了不同pH、碱度、温度条件对氨氧化的影响。实验结果表明,温度对氨氧化具有重要影响,在32～42℃的温度区间内,生物膜对氨氧化显现出显著的差异;在进水氨氮160～170mg/L条件下,36℃以下,氨氧化速率低,处理24h后,氨氧化率不到50%,氧化产物为亚硝酸盐和硝酸盐;38℃以上,氨氧化速率显著提高,进水氨氮完全氧化,水相中几乎检测不到亚硝酸盐,硝酸盐浓度占已氧化氨氮的70%左右。对生物膜氨氧化过程产生的气体进行气相色谱分析结果表明,氮气比例明显上升,达到94.4%,比对照气体(室内空气)增加了14.9%,说明自养生物膜发生了有趣的好氧反硝化脱氮现象。An antrophic ammonia-oxdlzing bacterium was isolated and enriched from the discharging water of an oilfield,and the autrophic ammonia-oxidizing biofilm was acquired through cultivation and film growth.The effect of different pH,alkalinity and temperature on ammonia-oxidizing was investigated.The experimental results showed that temperature had important influence on ammonia-oxidizing; within temperature 32-42℃ ,the biofilm displayed obvious difference agaist ammonia -oxidimng;under the condition of influent ammonia nitrogen of 160-170mg/L,below 36℃ ,ammonia-oxidizing rate was lower;after treating for 24h,ammonia-oxidizing rate was smaller than 50%;the oxidation product was nitrite and nitrate;above 38 ℃ ,ammonia-oxidizing rate rose rapidly,influent ammonia nitrogen was oxidated fully,nitrite could hardly be monitored in water phase;nitrate concentration accounted for only about 70% of ammonia nitrogen oxidated.The results of gas chromatographic analysis for the gas generated in the course of biofilm ammonia-oxidizing showed that the nitrogen gas ratio rose obviously, reaching to 94.4% and increasing by 14.9% in comparison with control gas;it was showed that interesting aerobic denitrification nitrogen removal of antrophic biofilm happened.

关 键 词：生物膜 氨氧化 好氧反硝化 硝酸盐 亚硝酸盐 

分 类 号：TQ028.8[化学工程]