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首页> 外文期刊>Environmental engineering and management journal >A REVIEW ON OCCURRENCE, MEASUREMENT, TOXICITY AND TANNIN REMOVAL PROCESSES FROM WASTEWATERS
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A REVIEW ON OCCURRENCE, MEASUREMENT, TOXICITY AND TANNIN REMOVAL PROCESSES FROM WASTEWATERS

机译：废水器的发生，测量，毒性和单宁清除过程的综述

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摘要

A wide range and globally active agro-industries such as olive oil processing, winery, tannery, textile and food production discharge a large volume of wastewater containing tannins. Tannins are complex structured chemicals which cause high organic content, requiring high dissolved oxygen in wastewater treatment plants or producing oxygen depletion in the aquatic environment. Tannins are known to be hardly degraded in biological treatment. There has been evidence that the presence of natural tannins can, to some extent, form antioxidant potential in wastewater while their degradation products can interact with the oxidants used in the treatment or final disinfection, the final effluent can display toxicity to aquatic species as well. Therefore, there has been a progressive but still to a limited extent of search to remove these compounds effectively. Several processes including physico-chemical, adsorption biological treatment, membranes treatment and advanced oxidation processes (AOPs) such as ozone, electrocoagulation, UV/H2O2, Fenton processes, photocatalysis have been attempted to treat tannins in general as integrated to biological processes. This paper aims to present a critical review of the chemistry, as well as sources of tannins in industrial wastewater and gives informative data on their toxicity. It finally reviews treatment methods with their descriptive data on their efficacy to remove the tannins from different origin wastewater.
机译：广泛且全球活跃的农业工业，如橄榄油加工，酿酒厂，制革厂，纺织品和食品生产，占含有单宁的大量废水。单宁是复杂的结构化学品，导致高有机含量，需要在废水处理厂中的高溶解氧或产生水生环境中的氧气耗尽。已知单宁在生物处理中几乎没有降解。有证据表明，在某种程度上，存在天然单宁的存在，而在一定程度上形成废水中的抗氧化潜力，而其降解产物可以与用于治疗或最终消毒的氧化剂相互作用，但最终的流出物也可以对水生物物种呈现毒性。因此，已经有一种渐进性但仍然是有限的搜索程度，以有效地除去这些化合物。几种过程包括物理化学，吸附生物处理，膜处理和先进的氧化方法（AOP），例如臭氧，电凝，UV / H 2 O 2，FENTON方法，光催化剂通常一般为生物过程综合治疗单宁。本文旨在对化学的批判性审查，以及工业废水中单宁的来源，并为其毒性提供信息丰富的数据。它终于评论治疗方法及其描述性数据，以效果，以从不同来源废水中除去单宁。

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