Studies On Decolorization And Biodegradation Of Dyes By High-efficient Strains

With the development of dye industry, the producing wastewater has become one of the major sources of pollution. The biotreatment process is economical and effective, so we usually consider the possibility of which firstly. At present, there are some researches covering the azo-dye, but we lack the systematic research on other structures and categories of dyes.Choosing triphenylmethane dye malachite green as the object, we screened seven high-efficient decoloring strains from the activated sludge in the aerator of Shi Shi wastewater treatment plant. By observing the morphological culture and physiological features of the strains, the strains were identified as Kurthia , Pseudomonas , Staphylococcus ,. Aeromonas , Arthobacter ,. Alealigenes and Corynebacterium, of which Pseudomonas sp. had highest-efficient degradation.Under the lab circumstance, firstly the studies were focused on the Pseudomonas sp. Strain's optimum decolorizing culture medium , the optimum conditions of decoloration ( including optimum pH , temperature , concentration of dye , salinity , oxygen , mental ions) and degradation to other dyes; Under optimum conditions, the strain can remove 98% of the color of malachite green after 28h treatment. Secondly we inquired into the strain's degradation mechanics. (1)we investigated the characteristic of crude decolorizing-enzyme.(2)HPLC, UV and IR were used to analyze the degradation of malachite green. Lastly we tested the Pseudomonas sp. and the decolorizing bacteria group' ability to decolorize and degrade the practical dye wastewater.The study tried to make a thorough understanding for degradation...