Isolation And Identification Of New Salt Tolerance Bacteria In Sewage And The Salt - Tolerant Biological Treatment Technology For Industrial Wastewater

Extremophiles lives with special physiological characteristics, like strong anti-stress, were found in different extreme habitats.It was reported in previous researchs that they have been applied in some cases of industrial wastewater treatment, which indicated that extremophiles had a great application potential. To understand the extremophiles, polyphasic taxonomy research was the first and an important step.In this paper, four halo-tolerant bacteria were isolated and identified bypolyphasic taxonomy methods. Strain TYT, for which the name Pectinatus brassicae sp.,nov. was proposed, was isolated from pickle wastewater; Strain BMT, for which the name Brassicibacter mesophilus gen. nov., sp. nov.was proposed, was isolated from pickle wastewater; Strain NH-JN4T, for which the name Oceanirhabdus sediminicolagen. nov., sp. nov. was proposed, was isolated from sea sediment; Strain ZN2’, for which the name Salimesophilobacter vulgarisgen. nov., sp. nov. was proposed, was isolated from paper-mill wastewater.Hundreds of halo-tolerant bacterial strains were isolated and preserved in our lab during the past decades. These strains were screened by high-level Na2SO4 chemical wastewater, which the common sludge was failed to treat. Eleven strains survived with strong growth in the wastewater. Based on the strains, a special sludge was developed to treat the high-level Na2SO4 chemical wastewater by contact oxidation method in actual application. With Na2SO4concentrate varied from 6% to 38%, COD removal rate remained steady over 95% for several years. Some other similar actual applicationswere performed.