Handling of membrane concentrate from reclamation of water in polyester dyeing

Alejandro Villanueva, Henrik Wenzel, Hans Henrik Knudsen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    This analysis presents the results of a study carried out on 6 alternative options for the disposal of membrane reject (concentrate) from a Danish polyester dyehouse. The options analysed comprise discharge to sewer (reference option and current practice), transport to biogas followed by sludge incineration, wet air oxidation, activated carbon, transport to hazardous waste treatment facility, and drying for zero-discharge. In most disposal scenarios considered it is advantageous to dewater the concentrate further from 2,5 %DS (dry solids) to 20 %DS in order to reduce its volume and thereby diminish the transport costs. Membrane filtration is a technology competitive to evaporation for dewatering at moderate DS contents that avoid the effects of fouling. The results obtained help concluding that discharge to sewer and biogas treatment are the less expensive options, as long as concentrate is free of pollutants that may disturb the treatment process or jeopardize further applications of the biodegraded residue. Total dewatering of the concentrate for zero liquid discharge is still the most expensive solution. The results obtained confirm that concentrate disposal is a major cost of industrial water recycling projects where the concentrate has low or no commercial value. In the scenarios analyzed, concentrate disposal costs represents between 10% and 70% of the total treatment costs per m3 of water recycled. It is therefore recommended to analyze in detail the available alternatives for concentrate disposal in order to identify these costs at an early stage of the projects.
    Original languageEnglish
    Title of host publicationMembranes in drinking- and industrial water production
    EditorsR. Gimbel, G. Hagmeyer, A. Lerch, J. Pöttgen, K. Sundaramurthy
    Publication date2003
    ISBN (Print)1-84339-439-1
    Publication statusPublished - 2003
    Event3rd International Conference on Membranes in Drinking and Industrial Water Production - Mülheim, Germany
    Duration: 22 Sep 200226 Sep 2002
    Conference number: 3


    Conference3rd International Conference on Membranes in Drinking and Industrial Water Production


    • Concentrate handling
    • Economic Assessment
    • Membrane filtration
    • Technical Assessment
    • Water reuse
    • Polyester dyeing
    • industrial water reclamation
    • membrane concentrate handling
    • substance reuse
    • waste design


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