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  • Title: DDT degradation potential of cattle manure compost.
    Author: Purnomo AS, Koyama F, Mori T, Kondo R.
    Journal: Chemosphere; 2010 Jul; 80(6):619-24. PubMed ID: 20494402.
    Abstract:
    The purpose of this study was to investigate the ability of cattle manure compost (CMC) to degrade 1,1,1-trichloro-2,2-bis (4-chlorophenyl) ethane (DDT). DDT was degraded during composting and 1,1-dichloro-2,2-bis (4-chlorophenyl) ethane (DDD) was detected as a metabolic product. Degradation of DDT at 60 degrees C was the most effective of all the stages of composting. Fourteen strains of fungi were isolated and identified from CMC, and most of them were closely related to Mucor circinelloides and Galactomyces geotrichum. These fungi demonstrated a high ability to degrade DDT both at 30 and 60 degrees C in potato dextrose broth (PDB) medium. DDD and 4,4-dichlorobenzophenone (DBP) were detected as metabolic products. Degradation of DDT-contaminated soil was also investigated. Composting materials in the mesophilic stage exhibited the highest ability to degrade DDT in un-sterilized (USL) contaminated soil during a 28d incubation period. The isolated fungi possessed the ability to degrade DDT in sterilized (SL) and un-sterilized (USL) soils. These results indicated that CMC contains fungi that can be potentially used for bioremediation in DDT-contaminated environments.
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