The present invention relates to Bacillus amyloliquefaciens strain NRRL B-50154 and methods and compositions for preventing and/or reducing biofilm formation on surfaces and/or planktonic proliferation in aqueous environments, especially in domestic/household and industrial settings. The present invention also relates to deodorizing liquid compositions which are designed to be applied in the areas of pet care, toilet care, carpet care, and garbage collections or processes, management of industrial wastes, including sludge processing, landfill and composting, and odor control of livestock production processes and other organic wastes.