Pollutant footprint analysis for wastewater management in textile dye houses processing different fabrics


Sözen S. , DULKADİROĞLU H., Yucel A. B. , Insel G. , Orhon D.

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, vol.94, no.4, pp.1330-1340, 2019 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 94 Issue: 4
  • Publication Date: 2019
  • Doi Number: 10.1002/jctb.5891
  • Title of Journal : JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
  • Page Numbers: pp.1330-1340
  • Keywords: textile dyeing, wastewater footprint, COD footprint, modeling, treatment optimization, BIOLOGICAL TREATABILITY, COD FRACTIONATION, SIMULATION, REUSE

Abstract

BACKGROUND This study investigated the water and pollution footprints of a dye house, which processed cotton knits, polyester (PES) knits and PES-viscose woven fabrics. Experimental evaluation was carried out for each processing sequence. Variations in wastewater flow and quality were established as a function of the production program in the plant. A model evaluation of wastewater dynamics was performed and defined specifications of an appropriate treatment scheme. RESULTS The plant was operated with a capacity of 4300 t year(-1) of fabric, which generated a wastewater flow of 403 500 m(3) year(-1) and a COD load of 675 t year(-1). The overall wastewater footprint of the plant was computed as 91 m(3) t(-1) and the COD footprint as 160 kg t(-1) of fabric. Depending on the fabric type, results indicated expected changes in wastewater flow between 600 and 1750 m(3) day(-1); in COD load between 1470 and 2260 kg day(-1) and in COD concentration between 1290 and 3400 mg L-1. CONCLUSION A model simulation structured upon COD fractionation and related process kinetics revealed partial removal of slowly biodegradable COD, coupled with high residual COD, which would by-pass treatment. Resulting biodegradation characteristics necessitated an extended aeration system, which could also enable partial breakdown of residual COD. Effluent COD could be reduced to 220-320 mg L-1 with this wastewater management strategy. (c) 2018 Society of Chemical Industry