Microbial agent for degrading aromatic organic matters in chemical wastewater and reducing COD (Chemical Oxygen Demand) and application of microbial agent

The invention relates to a microbial agent for degrading aromatic organic matters in chemical wastewater and reducing COD (Chemical Oxygen Demand). The microbial agent comprises saccharomycetes, actinomycetes, lactic acid bacteria, nitrogen-fixing bacteria and cellulose decomposition bacteria, the lactic acid bacteria are wrapped in the capsule B, the saccharomycetes are wrapped in the capsule A, and the nitrogen-fixing bacteria are wrapped in the capsule C. Gradient activation time is set for the capsules A, B and C, different microorganisms are wrapped by the capsules with different degradation time and are released in sequence in an echelon mode, so that each microorganism plays the roles of degrading polycyclic or heterocyclic aromatic organic matters to the maximum extent and reducing chemical wastewater COD, and the effect of degrading the chemical wastewater in the echelon mode is achieved. The problem that the polycyclic or heterocyclic aromatic organic matters are difficult to degrade is solved, the