| Literature DB >> 31501751 |
Munzer Ullah1, Hui Li1, Shi-Wei Sun1, Cai-Hong Weng1, Hong Zhang1, Hu Zhu1,2.
Abstract
A novel polyvinyl alcohol (PVA)-degrading strain Bacillus cereus RA23 was isolated from an oil sludge sample and environmental factors affecting its PVA degradation efficiency were optimized in detail. Inorganic nitrogen source, ammonium chloride (NH4Cl), was found to be the best nitrogen source and enhanced the PVA degradation rate greatly. The optimal medium for PVA biodegradation consisted of (g/L) PVA 1, NH4Cl 1, K2HPO4 1.6, MgSO4·7H2O 0.05, FeSO4·6H2O 0.02, CaCl2 0.05, NaCl 0.02. The optimal temperature and pH for PVA biodegradation by strain RA23 was 28 °C and 7.0, respectively, and 85% of 0.1% PVA was degraded after 5 days under these conditions. FTIR studies showed that the carboxylic acids (possibly including aldehyde or ketone) could be the intermediate product of PVA biodegradation. The investigation of strain RA23 for PVA degradation will provide important information to facilitate the removal of wastewater pollution in industrial zones.Entities:
Keywords: Bacillus cereus RA23; Biodegradation; Culture condition optimization; Polyvinyl alcohol; Structural changes
Year: 2019 PMID： 31501751 PMCID： PMC6722167 DOI： 10.1007/s13205-019-1882-6
Source DB: PubMed Journal: 3 Biotech ISSN： 2190-5738 Impact factor: 2.406