title: Ternary cycle treatment of high saline wastewater from pesticide production using a salt-tolerant microorganism.
abstract: The material of this study is provided by biological aerobic treatment of high saline wastewater from pesticide production. The microorganism used for biodegradation has been identified by gene-sequencing as a strain of Bacillus sp. SCUN. The best growth condition for the salt-tolerant microorganism has been studied by varying the pH, immobilized microorganism dosage and temperature conditions. The feasibility of pretreating wastewater in ethyl chloride production containing 4% NaCl has been discussed. It was found that under the pH range of 6.0-8.0, immobilized microorganism dosage of 1.5 g/L, temperature of 30 °C, and NaCl concentration of 0-3%, the microorganism achieves the best growth for biodegradation. After domestication, the strain can grow under 4% NaCl. This salt-tolerant microorganism is effective in the pretreated high saline wastewater. With a newly developed ternary cycle treatment, the chemical oxygen demand removal approaches 58.3%. The theoretical basis and a new method for biological treatments in biodegradation of high saline wastewater in ethyl chloride production are discussed.
authors: School of Chemistry and Material Science, South Central University for Nationalities, Wuhan, Hubei, China.
authors: Xiang
authors: X
authors: Wu
authors: Ya-guang
authors: YG
authors: Du
authors: Yi
authors: Y
authors: Qu
authors: Dong-yun
authors: DY
authors: Du
mesh_terms: D000222:Adaptation, Physiological; D001407:Bacillus / Q000145:classification / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D010575:Pesticides / Q000138:chemical synthesis* / Q000302:isolation & purification / Q000378:metabolism; D010802:Phylogeny; D012965:Sodium Chloride / Q000737:chemistry*; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000378:metabolism; D018508:Water Purification
chemical_list: D010575:Pesticides; D012965:Sodium Chloride; D062065:Wastewater; D014874:Water Pollutants, Chemical