Study on preparation of the compound microbial deodorizer and deodorization characteristics

Abstract The chicken feces, landfill leachate, landfill compost products, and effective microbiological (EM) composite bacteria were used to screen high‐efficiency deodorizing strains. The preparation of composite microbial deodorizing bacteria was provided for the harmless and resource treatment of livestock and poultry feces. Firstly, the domestication enrichment method, plate separation method, primary screening, and re‐screening method were used to screen the deodorizing strains. Then, all the screened strains were identified by the combination of conventional morphological identification and physiological and biochemical identification. At last, the antagonism experiment was used to study the antagonistic characteristics of all the strains, and the growth curve was used to study all the strains logarithmic growth period. Results indicated that four strains have dominant deodorization ability, including two strains of bacteria (BA 13 , BA 11 ), one fungus strain (FU 10 ), and one yeast strain (YE 8 ). Strains BA 13 and BA 11 of hydrogen sulfide and ammonia removal efficiency were 88 ± 3.45% and 88 ± 3.98%, respectively. The four strains were prepared as the compound microbial deodorizer, and it obtained a dominant odor removal ability; the hydrogen sulfide and ammonia removal efficiencies were 70 ± 5.43% and 68 ± 4.56%, respectively. The compound microbial deodorizer can reduce the concentrations of hydrogen sulfide and ammonia and obtain excellent potential in deodorizing livestock and poultry feces composting.