| In recent years, pharmacy is holding a very important poison in the national manufacturing field, and increasing rapidly along with the increasing requirements of people's daily lives. However, requirement of disposal of tons of wastewater follows. Thus, ineluctably, mephitical gas generated from disposal of wastewater becomes one of the main sources of mephitical gas in cities. The main component of the mephitical gas is sulfureted hydrogen.This paper studied the effect of running conditions on the removing efficiency of hydrogen sulfide in high-efficient biological deodorization reactor in lab and project. The biofilm of the equipment was prepared from screened and cultivated bacteria. The results showed that the optimal influent air volume is 300L/h, the optimal retention time is 49.56s. Removal efficiency can reach over 98% at four different conditions: the concentration of inlet 0~1000 mg/m and the gas flow below 200L/h;the concentration of inlet 0~700 mg/m 3 and the gas flow 300L/h; the concentration of inlet below 450 mg/m 3 and the gas flow 400L/h; the concentration of inlet below 300L/m and the gas flow 500L/h. The optimal intermittent spraying interval for cycled liquid is 15min per 60min. It is found that when H S removal2 efficiency reach above 98%, and the maximum H S loading rate is 60g/m·h.3 strains of deodorizing bacteria for hydrogen sulfide were isolated and screened from the well domesticated bioreactor. Physio-biochemical analysis suggests that L1 belongs to Microbacterium, L2 belongs to Bacillus, L3 belongs to Salmonella.The bioreactor shows high removal efficiency for hydrogen sulfide during debugging phrase, the average removal efficiency for hydrogen sulfide being above 93%. At stable operation phrase, the average removal efficiency of the equipment reached 96.7%, when the average exhaust amount of hydrogen sulfide was 0.185kg/h, and so after treatment the discharged gas could meet Emission Standards for odor pollutants (GB14554-93).
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