Authors:
Mateo Pastur Romay | Clariant Ibérica Producción | Spain
Sonia Vila | Dow Water & Process Solution | Spain
Claudia Niewersch | Dow Water & Process Solution | Spain
Catalin Pătruț | Blue-Tec | Netherlands
Dr. Jozef Kochan | Clariant Produkte (Deutschland) GmbH | Germany
Robin Wünsch | FHNW - University of Applied Sciences and Arts Northwestern Switzerland | Switzerland
Lex van Dijk | Blue-Tec | Netherlands
Christian Kazner | Ruhr Universität Bochum | Germany
Jan Koppe | MOL Katalysatortechnik GmbH | Germany
Jaime Palacín | Clariant Ibérica Producción | Spain
Friedhelm Zorn | Clariant Produkte (Deutschland) GmbH | Germany
The fresh water scarcity and the more stringent discharge limits are the main challenges for the industry in impacted regions. Meanwhile, the elimination of specific pollutants such as e.g. micro-pollutants from the effluent of wastewater treatment plants has gained more attention. In the presented demonstration study, we assess both the performance of the proposed ZLD concept to reuse industrial wastewater and the total treatment costs.
From a quality point of view, the water produced is compared with the requirements of the chemical industry and the Spanish Legislation about water reuse in the industry.
The core of the concept is ultrafiltration (DOW IntegraFlux™ SFP-2880XP) pretreated reverse osmosis (DOW FILMTEC™ FORTILIFE™ CR100) employing adsorption step to reduce organic load (granular activated carbon with 3 filters in series) and advanced oxidation process (UV/H2O2, 350W, low pressure UV lamp) as final polishing step to meet high quality permeate requirements.
The catalyst MOL®LIK was installed prior to ultrafiltration and reverse osmosis to enhance filtration performance by repressing fouling and scaling.
For the concentrate treatment the innovative concept of Blue-tec was tested. The RO brine was treated by forward osmosis coupled with high brine reverse osmosis and/or membrane distillation for the draw solution recovery.
To investigate the viability of the concept, a 5.0 m3/h pilot unit were constructed and operated continuously for treatment of secondary effluent of the wastewater treatment plant of Clariant Ibérica Producción in Tarragona, Spain.