This invention relates to a synthetic microbial
community for degrading polycyclic aromatic hydrocarbons (PAHs) and its applications, belonging to the field of
environmental remediation microbial technology. First, a strain of *Bacillus polymyxa* C9-5 is provided, deposited on June 5, 2026, at the China General
Microbiological Culture Collection Center (CGMCC) with accession number CGMCC No. 39269. Then, a synthetic microbial
community for degrading PAHs is provided, comprising *Bacillus polymyxa* C9-5 and *
Acinetobacter* B2-4. Finally, a composite
microbial agent for degrading PAHs is provided, comprising a suspension of *Bacillus polymyxa* C9-5 and a suspension of *
Acinetobacter* B2-4. This invention is the first to combine *Bacillus polymyxa* C9-5 and *
Acinetobacter* B2-4 together to synergistically degrade PAHs in soil or
wastewater. The degradation effect on PAHs is significantly better than that of any
single strain, showing excellent
efficacy in degrading high-ring PAHs and possessing broad application prospects.