城市污水厂恶臭的生物过滤处理系统设计和运行

Design and Operation of Biofiltration Deodorization System in Municipal Wastewater Treatment Plant

采用生物过滤法对南方某城市污水处理厂的污泥浓缩池和脱水车间的臭气进行了处理。60 d的除臭运行结果表明,在H2S和NH3的进气浓度分别为0.18-2.71 mg/m3和1.93-5.95 mg/m3条件下,处理后的H2S和NH3浓度分别为0.01-0.08 mg/m3和0-0.62 mg/m3,在除臭系统6 m外臭气浓度均能达到二级排放标准;除臭系统滤料上的微生物数量丰富,其中细菌数高达(0.3-5.4)×109CFU/g,细菌、酵母菌和霉菌的优势种属分别为芽孢杆菌属、假单胞菌属、硫杆菌属、酵母属、假丝酵母属、曲霉属和青霉属。

The biofihration method was used to treat the odor produced from the activated sludge thickener and sludge dehydrating unit of a municipal wastewater treatment plant in southern China. The operation results for sixty days show that the concentrations of hydrogen sulfide and ammonia in the out- flow are ranged from 0.01 mg/m^3 to 0.08 mg/m^3, and from 0 mg/m^3 to 0.62 mg/m^3 respectively when the concentrations of hydrogen sulfide and ammonia in the inflow are 0.18 mg/m^3 to 2.71 mg/m^3 and 1.93 mg/m^3 to 5.95 mg/m^3. The quality of the outflow can achieve the second discharge standard within a range of 6 m outside of the plant. The microbial species on the filter medium are dramatically abundant, especially the bacteria which are 0.3 × 10^9 CFU/g to 5.4 × 10^9 CFU/g. And the dominant genera are Bacillus, Pseudomonas , Thiobacillus , Saccharomyces , Candida , Aspergillus and Penicillium.