黑料网

Abstract

The cloth enterprise needs massive volumes of excessive fine water which converts into wastewater contaminated by means of huge spectrum of chemicals. Estimation of material wastewater impact on the aquatic structures is a very necessary issue. Therefore, closing of the water cycle inside the factories is a promising technique of reducing its environmental influence as properly as operational costs. Taking each motives into account, the purpose of this work was once to set up the acute toxicity of the cloth wastewater earlier than and after separate chemical, organic as nicely as blended chemical-biological treatment. For the first time the outcomes of three exclusive combos of chemical and organic techniques have been investigated. The acute toxicity evaluation have been evaluated the use of the Microtox® toxicity test. Ozonation in two reactors of working extent 1 dm3 (stirred cell) and 20 dm3 (bubble column) have been examined as chemical process, whilst biodegradation used to be carried out in two, distinctive structures – Sequence Batch Reactors (SBR; working quantity 1.5 dm3) and Horizontal Continuous Flow Bioreactor (HCFB; working extent 12 dm3). The untreated wastewater had the perfect toxicity (EC50 fee in range: 3–6%). Ozonation triggered decrease discount of the toxicity than biodegradation. In the machine with SBR the quality consequences have been received for the biodegradation accompanied with the aid of the ozonation and extra biodegradation – 96% of the toxicity removal. In the 2d device (with HCFB) two-stage cure (biodegradation accompanied with the aid of the ozonation) led to the perfect toxicity discount (98%).