Floating composite microbial preparation for removing offshore oil pollution and preparation method thereof

The invention discloses a floating composite microbial preparation for removing offshore oil pollution and a preparation method of the floating composite microbial preparation. The floating composite microbial preparation contains the bacillus thuringiensis NH26 strain, the hollow glass beads and the lipopeptide surfactant obtained by purifying fermentation liquor of the NH26 strain, has the floating characteristic, can be rapidly activated and efficiently degrade petroleum hydrocarbon, and has good degradation capacity on alkane and polycyclic aromatic hydrocarbon in seawater. The strain still has good alkane degradation capability in seawater containing high-concentration petroleum hydrocarbon, and can be used for removing offshore petroleum pollution and repairing the marine environment. In addition, the invention further provides a preparation method of the floating compound microbial preparation, the preparation process of the preparation method is simple, and the obtained floating compound microbial pre