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首页> 外文期刊>Biotechnology Progress >Aerobic Degradation of a Mixture of Azo Dyes in a Packed Bed Reactor Having Bacteria-Coated Laterite Pebbles
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Aerobic Degradation of a Mixture of Azo Dyes in a Packed Bed Reactor Having Bacteria-Coated Laterite Pebbles

机译：有细菌包被的红土卵石的填充床反应器中偶氮染料混合物的有氧降解

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摘要

A microbial consortium capable of aerobic degradation of a mixture of azo dyes consisting of two isolated strains (RRL,TVM) and one known strain of Pseudomonas putida (MTCC 1194) was immoblilzed on laterite stones.The amount of bacterial biomass attached to the laterite stones was 8.64 g per 100 g fo the stone on a dry weight basis.The packed bed reactor was filled with these stones and had a total capacity of 850 mL and a void volume of 210 mL The feed consisted of an equal mixture of seven azo dyes both in water as well as in a simulated textile effluent,at a pH of 9.0 and a salinity of 900 mg/L.The dye concentrations of influent were 25,50 and 100mug/mL.The residence time was varied between 0.78 and 6.23 h.It was found that at the lowest residence time 23.55 45.73and 9.95mug of dye was degraded per hour at an initial dye concentration of 25,50 and 100 mug respectively.The pH was reduced from 9.0 to 7.0 Simulated textile effluent containing 50 mug/mL dye was degraded by 61.7% Analysis of degradation products by TLC and HPLC ahowed that the dye mixture was degraded to nontoxic smaller molecules.The bacteria-coated pebbles were stable there was no washout even after 2 months and the reactor way found to be suitable for the aerobic degradation of azo.dyes.
机译：将能够对包括两个分离菌株（RRL，TVM）和一个已知恶臭假单胞菌（MTCC 1194）的偶氮染料混合物进行好氧降解的微生物财团固定在红土石上。以干重计，每100克石头含8.64克。填充床反应器装有这些石头，总容量为850毫升，空隙体积为210毫升。进料由七种偶氮染料的均等混合物组成在pH值为9.0，盐度为900 mg / L的水中以及模拟的纺织品废水中，进水的染料浓度分别为25,50和100mug / mL，停留时间在0.78和6.23 h之间变化结果发现，在最低停留时间下，初始染料浓度分别为25,50和100杯时，每小时降解的染料分别为23.55 45.73和9.95杯.pH值从9.0降至7.0含50杯/杯的模拟纺织废水mL染料被61.7％分析降解薄层色谱和高效液相色谱法可降解数种染料，从而将染料混合物降解为无毒的小分子。细菌包衣的小卵石稳定，即使经过2个月也没有洗出，反应器方法适合于好氧降解偶氮。染料。

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