NOVELTY - Controlling foam in manure pit, comprises administering Bacillus strains to pigs whose manure is stored in manure pit. The Bacillus strains comprise: Bacillus licheniformis 842 (NRRL B-50516) or strain having all of identifying characteristics of B. licheniformis 842 (NRRL B-50516); B. subtilis 27 (NRRL B-50105) or strain having all of identifying characteristics of B. subtilis 27 (NRRL B-50105); or B. licheniformis 21 (NRRL B-50134) or strain having all of identifying characteristics of B. licheniformis 21 (NRRL B-50134).    USE - The method is useful for controlling foam in a manure pit (claimed) or an anaerobic digester.    ADVANTAGE - The method utilizes the Bacillus strain, which reduces the amount of nutrients in the swine manure pits and regulates the anaerobic fermentation, hence it is efficient in controlling the foam, as compared to conventional methods.    DETAILED DESCRIPTION - Controlling foam in a manure pit, comprises administering Bacillus strains to pigs whose manure is stored in the manure pit. The Bacillus strains comprise: Bacillus licheniformis 842 (NRRL B-50516) or a strain having all of the identifying characteristics of the B. licheniformis 842 (NRRL B-50516); B. subtilis 27 (NRRL B-50105) or a strain having all of the identifying characteristics of the B. subtilis 27 (NRRL B-50105); or B. licheniformis 21 (NRRL B-50134) or a strain having all of the identifying characteristics of the B. licheniformis 21 (NRRL B-50134), where 70% of the total colony-forming units (CFUs) of the Bacillus strains is B. licheniformis 842 (NRRL B-50516) or a strain having all of the identifying characteristics of the B. licheniformis 842 (NRRL B-50516), 10% of the total CFUs of the Bacillus strains is B. subtilis 27 (NRRL B-50105) or a strain having all of the identifying characteristics of the B. subtilis 27 (NRRL B-50105), and 20% of the total CFUs of the Bacillus strains is B. licheniformis 21 (NRRL B-50134) or a strain having all of the identifying characteristics of the B. licheniformis 21 (NRRL B-50134). The strains are administered at a rate of at least 1 x 105 CFU/g of feed fed to the pigs.