Authors:
Larisa Mocanu, Maria Gonta
Larisa Mocanu, Maria Gonta
Conference: International Symposium “The Environment and the Industry”
Date: 26-27 September 2019
Location: Bucharest, Romania
Published: 2019
Keywords:
Agents
Extile auxiliary
Synthetic effluent
Free formaldehyde
COD
Coagulation
Abstract:
Wastewaters generated from textile factories are linked to one of the main water pollution problems. They contain a mixture of different dyes, auxiliaries, additives, and additional chemicals that were added during textile production processes. If these effluents do not treat they will cause serious environmental concerns. However, the main problematic pollutants from textile factories in the aquatic environment are dye mixtures. These mixtures can be treating by more physic-chemical methods such as electro flotation, coagulation, exchange ions etc. Coagulation process is important in several wastewater treatment operations. It reduces suspended solids and organic loads from primary clarifiers in overloaded wastewater treatment plants and is the practice of chemically enhancing primary treatment. The main purpose of the research is to evaluate the effectiveness of treatment by coagulation process in model systems with the following composition: red direct dye – dispersing agent – emollient – fixing agent, I – DR – LS – Bis-MPA – DEG and the second system contains also free formaldehyde, II – DR – LS – Bis-MPA – DEG – FA. The related objectives were to (i) determine the chemical oxygen demand of mixtures that containing direct red dye and textile auxiliary agents and (ii) comparing these results.