International Specialised Conference on Chemical Process Industries and Environmental Management, Cape Town, South Africa, 8-10 September 1997: Treatability of strong wastewaters from polyester manufacturing industry

S. Meriç*, I. Kabdaşli, O. Tünay, D. Orhon

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

In this paper, the treatability of strong wastes originating from an organic chemicals industry was studied. Literature data were evaluated to assess the applicability of conventional and advanced methods of treatment to highly concentrated wastewaters. A detailed treatability study was conducted on the wastewater, which was provided from a small-scale polyester manufacturing plant. The manufacturing process involved only esterification reactions. generating a wastewater with a COD content of over 200,000 mg l-1. The applicable treatment methods to be tested were determined as biological treatment of activated sludge process with low organic loading and chemical oxidation with H2O2. Results of the biological treatability study indicated that 8O% COD removal could be obtained with 10 days retention time, provided that the system was fed with a 1/100 diluted raw wastewater. Chemical oxidation of raw wastewater with H2O2 in acid conditions and using ferric chloride as catalyst yielded 70% COD removal. However, the dosage required to obtain this efficiency was about 1 kg H2O2 per m3 of wastewater. With these applications the wastewater was treated to yield a COD of lower than 2000 mg/l. Results of the study were discussed and evaluated considering complexity and cost of treatment.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalWater Science and Technology
Volume39
Issue number10-11
DOIs
Publication statusPublished - 1999

Keywords

  • Biological treatment
  • Chemical oxidation
  • Organic chemical industry
  • Polyester manufacturing wastewaters
  • Strong wastes

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