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首页> 外文期刊>Desalination: The International Journal on the Science and Technology of Desalting and Water Purification >Investigation of the relation between COD fractions and the toxicity in a textile finishing industry wastewater:Effect of preozonation
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Investigation of the relation between COD fractions and the toxicity in a textile finishing industry wastewater:Effect of preozonation

机译：纺织品整理工业废水中化学需氧量与毒性之间关系的研究：预臭氧化的影响

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摘要

Textile industry is one of the most common and essential sectors in the world.On the other hand,high volume of water consumption and varying wastewater characteristics due to many products such as dyes,biocides,carriers,detergents,etc.used in the process are the factors that have caused a continuous effort to find appropriate technologies to treat textile industry wastewater.In the last decade,the use of advanced oxidation processes(AOPs)has gained importance to degrade,decolorise and detoxicify the textile wastewater.However,the main mechanisms for AOPs for removing toxicity,thus,any contribution by the reduction of decreased inert factions in the effluent of textile wastewater are still to be studied.This study aimed to investigate the relation between inert COD fractions(which are characteristics in part of the influent wastewater,and in part generated in the biological treatment as the common used treatment process for textile industry)and effluent toxicity in the presence/absence of pre-ozonation.18.5 mg/ 1 of ozone dose was applied during 30 min oxidation on two wastewater samples taken from balancing tank of a textile industry localized in Istanbul,Turkey.A direct assessment method was used to determine inert COD fractions of the raw and ozonated wastewater samples.The toxicity of raw and treated was tested using newborn(<24 h)samples of Daphnia magna for 24 h exposure time.The soluble inert COD(S_1)decreased significantly while soluble residual microbial product(S_p)increased slightly due to preozonation.The sum of soluble inert fractions were found in the order of 17-18% and 20% of total COD for raw and preozonated samples.Preozonation decreased the toxicity of raw wastewater.This phenomenon was evidenced also by testing the effluents of the inert COD determination reactors.
机译：纺织工业是世界上最普遍且必不可少的行业之一。另一方面，由于该过程中使用了许多产品，例如染料，杀菌剂，载体，洗涤剂等，因此耗水量大且废水特性各不相同。在过去的十年中，使用高级氧化工艺（AOPs）来降解，脱色和脱毒纺织品废水变得越来越重要。然而，主要机理是对于去除毒性的AOP，因此，仍有待减少纺织废水中惰性成分减少的贡献。本研究旨在研究惰性COD组分之间的关​​系（这是部分进水废水的特征）。 （部分是在生物处理过程中产生的，这是纺织业常用的处理方法），在有/无的情况下产生废水毒性在30分钟的氧化过程中，对从土耳其伊斯坦布尔的一家纺织工业的平衡罐中采集的两个废水样品施加了18.5 mg / 1的臭氧剂量。采用直接评估方法确定原料中的惰性COD分数用新生的水蚤（<24 h）暴露24 h测试生和处理后的毒性。可溶性惰性COD（S_1）显着降低，而可溶性残留微生物产物（S_p）略有增加。原始和预臭氧化样品的可溶性惰性成分总和约为总COD的17-18％和20％，预臭氧化降低了原废水的毒性，这一现象还通过测试废水的废水来证明。惰性COD测定反应器。

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