The textile industry uses different dyes and pigments for coloring the final fabrics manufactured. The main difference between both is essential that dyes are soluble in water and pigments are not. And therefore, tubular UF membranes are able to remove pigments in those specific streams coming from the dying processes. By doing this before they are mixed with the rest of the wastewater coming from further processing steps, the whole treatment can be greatly simplified.
As an example, we find the so-called indigo blue dye used for denim, where Berghof tubular UF removes up to 90% color and > 99% turbidity. In this approach, the Berghof tubular UF membranes are applied as a solely direct filtration treatment step. The ability to cope with high suspended solids concentration, together with the cross-flow operation that minimizes the fouling, allows operating the system with high fluxes, minimum reject, and definite stability. The permeate obtained is clear, free of pigments and turbidity. The reject stream can even be recyclable within the dying process.
The dying processes in the textile industry generate separated waste streams containing a significant amount of residual dye products. After the fine screening to remove the fibers, this stream is directed to the tubular ultrafiltration membranes. Here, a reject with a high dye concentration is produced: it can be recovered for the dying process. The permeate is free of dyes, solids and turbidity; it can be mixed with additional waste streams generated in the textile facilities and directed to the on-site treatment plant. Alternatively, it can be discharged to the public sewer in the case that the quality fulfills the local standards.
To prevent fouling and clogging, Berghof Membranes developed its line of robust tubular UF (ultrafiltration) membrane modules based on inside-out crossflow filtration.
Berghof Membranes developed B-SMART®, a customizable external membrane filtration system that can be designed with various features and functionalities.
Bridging the gap between lab-scale testing and manufacturing. Our experts gives you the confidence to apply the technology for your specific wastewater challenges.
The B-CARE® program is an end-to-end comprehensive program developed to support our OEM partners from the piloting/engineering phase to operational system monitoring.
Subscribe now and receive monthly updates from us with the latest news, offers, and more for free.
You can unsubscribe at any time by clicking the “unsubscribe” link at the bottom of any of our emails.
We would be pleased if you could also give us your first and last name so that we can address you personally.
Berghof Membrane Technology GmbH (BMT), part of the Berghof Group, is the leading manufacturer of tubular membranes for the filtration and separation of process streams and wastewater in a variety of industries.
