Membrane technology for the treatment of industrial wastewater containing cationic surfactants
2021
Klimonda, A. | Kowalska, I.
The composition of industrial wastewater, its purification and concentration processes using ceramic membrane modules were investigated. Industrial wastewater produced as a result of washing the production line at a plant manufacturing cationic surfactants (in the esterquats group) was subjected to membrane filtration in a semi-pilot plant, run in concentration mode. Analysis of the raw wastewater showed very high organic matter content, expressed as COD, in the range of 17,700 to 24,300 mg L⁻¹ and the concentration of cationic surfactants amounted to 2890–3390 mg L⁻¹ mg/L. Ceramic membrane modules with a pore size of 0.14 μm exhibited high effectiveness in surfactant wastewater treatment. COD, TOC and turbidity were reduced by 93%, 95%, and 99%, respectively. When the process was run in concentration mode almost 50% of the permeate was recovered.
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