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Published: Kem. Ind. 56 (11) (2007) 575–581
Paper reference number: KUI-16/2007
Paper type: Original scientific paper
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Wastewater Treatment After Improved Scourings of Raw Wool

D. Došen-Šver, E. Pernar and I. Bujević


Textile industry processes need high amounts of water for wet treatment of textiles. Therefore, high amounts of wastewater also appear containing different inorganic and organic substances depending on the used materials and processes. Raw wool is contaminated with wool wax, suint, skin flakes, dirt, sand, vegetable matter, urine and various microorganisms. The methods for raw wool scouring and cleaning today often in use are: scouring in the suint, scouring with soaps or tenside in alkaline, extraction by organic solvents and freezing. The different methods for wastewater purification after scouring in use are: settling/floculation, biological treatment, adsorption and catalytic oxidation. In this work, wastewater treatments after improved raw wool scouring with enzymes and EDTA have been investigated. Isothermal adsorption on zeolite A, active carbon and a natural and H+ type of bentonite for removal of the obtained wastewater impurities was used. The results were determined by means of different physical-chemical test methods.

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wool scouring, wastewater, complexing agents, enzymes and EDTA