Microorganisms capable of rapid decomposition Cypermethrin to improve enviroment.

Result:

• Isolated 27 strains of microorganisms capable of growing on the medium containing Cypermethrin (Cyper) such as  a source of only carbon.
• Co-culture of DRL8-1, DRL1 and BAT1 in the medium increased the efficiency of cypermethrin degradation compared with a single strain. co-culture of strain DRL8-1 with strain BAT1 for the fastest and most stable cypermethrin degradation.
• Streptomyces parvulus ĐRL8-1, Mycobacterium vaccae ĐRL1 has superior ability to degrade Cyper; (the rate of degrade reached 82,84 – 90,05% after 3 week in the medium with Cypermethrin concentration 50 mg/l); and Ochrobactrum lupini BAT1capable of completely degrading residues Cyper with concentration10 mg/l in 48 hours.
• The combined culture of strains ĐRL8-1, ĐRL1 and BAT1 increased the ability to degrade Cypermethrin in the medium. In the research experiments; the combined culture of strains ĐRL8-1with BAT1 has the fastest and most stable degradation of decomposit Cyper.
• When adding a mixture of two selected microorganisms to the culture medium of black tiger shrimp contaminated with Cypermethrin 0,05 ppm, has degraded 84,69 % and has a good effect on shrimp. The addition of the microbial mixture to the shrimp culture medium did not affect the growth of shrimp and reduced mortality shrimp caused by decomposit Cypern.