Preparation of complex microbial adsorbent for deodorization and its application to deodorization

To protect air quality in the neighboring communities of livestock and poultry farms, odor control must be considered as an essential part of managing livestock facilities. Bacillus megaterium CCW-Y1, Streptomyces griseus CCW-Y2 and Candida tripicalis CCW-Y3 were screened from the soil of a piggery, which were effective for deodorization of odor pollutant in the livestock and poultry farms. The hull of rice and ceramic particle were selected as the carrier. The complex microbial adsorbent was prepared when mixed culture of these three microorganisms was combined with the carrier. The biomass in the carrier was 4.50～6.05 g/kg. The lab test showed that the complex microbial adsorbent could reduce ammonia concentration and odor intensity by more than 80%, reduce hydrogen sulfide concentration by more than 65% in swine, chicken and cattle manure. The complex microbial adsorbent was placed in the flat tray, which was hung in the piggery and compost field for deodorization test. The results showed that the concentrations of ammonia, hydrogen sulfide and odor were reduced by 78.4%, 66.7% and 83.3%, respectively in the piggery; and they were reduced by 84.4%, 62.1% and 88.5%, respectively in the compost field. The effective time of complex microbial adsorbent is longer than that of common adsorbent, and the pigs are all normal during the test.