紫外-生物过滤联合工艺和单一生物过滤工艺中微生物代谢特性的比较

Comparison of microbial metabolic characteristics in UV-biofilter and biofilter treatment processes

为了系统阐述紫外预处理对生物过滤塔中微生物代谢特性的影响,比较分析了紫外-生物过滤联合工艺和单一生物过滤工艺中微生物代谢特性的变化规律.研究结果表明,联合工艺和单一工艺中微生物的平均代谢活性(AWCD)分别为0.023～0.038和0.024～0.045cm-1.h-1,联合工艺中微生物平均代谢活性高于单一工艺.不同工艺中微生物对碳源的代谢特性存在显著差异:联合工艺中微生物对胺类、醇类和糖类碳源的代谢能力优于单一工艺,对酯类、氨基酸类和羧酸类碳源的代谢能力与单一工艺相当,而对于聚合物类碳源的代谢能力则弱于单一工艺.

To investigate the effects of UV pretreatment on microorganisms in a subsequent biofilter,the changes of microbial metabolic characteristics inside a biofilter with UV pretreatment（UV-BF）and a standalone biofilter（BF）were studied.The Biolog method was used to analyze microbial metabolic characteristics.The average well color development values of UV-BF samples were 0.024-0.045 cm^-1·h^-1,while the AWCD values from the BF samples were 0.023-0.038 cm^-1·h^-1.This result indicated that the microbial metabolic activity in the UV-BF was a little higher than that in the BF.Moreover,the microorganisms in both biofilters demonstrated different metabolic characteristics.The microorganisms in the UV-BF showed higher metabolic activities for amines,alcohols and carbohydrates,but lower higher metabolic activities for polymers than those in the BF system.The microbial samples from UV-BF and BF showed the same metabolic activities for lipids,amino acids and carboxylic acids.