Recycling of industrial process brines
Dr. Yuliya Schießer | Covestro Deutschland AG | Germany
This project deals with the recovery of salt (NaCl) that is contained in industrial process water streams from plastic manufacturing. The aim is to recycle it as a raw material to produce chlorine and caustic soda in the chlorine-alkali electrolysis as well as to recycle the resulting water.
Innovative technologies for reuse of petrochemical condensates
Irina Veleva | Ghent University (UGent) | Belgium
The production of steam in the petro(chemical) industries is very crucial and it relies on the availability of fresh water supplies for Boiler Feed Water (BFW). The aim of this research is to increase the ratio of steam/water cycle and recover condensate streams resulting from the petrochemical industry as BFW for generation of steam.
Reuse of waste streams from the industry also brings the economical benefit and the possibility to recover available waste process heat and to lower the water foot print of the company. Reclaim of condensates as BFW requires very high quality and because of that different technologies such as Membrane Distillation and Membrane Aerated Biofilm Reactor (MABR) have been studied in details.
The treatment efficiency of these techniques was individually examined, based on which each of them or combinations of both in different scenarios could be applied in order to achieve the effluent with the highest quality for reuse.
Industrial reuse of advanced reclaimed water: six years of experience in Camp de Tarragona
Yvan Poussade | VEOLIA | France
Since November 2012, the Advanced Water Reclamation Plant (AWRP) of Camp de Tarragona has been continuously supplying reclaimed water and demineralized water to the Tarragona petrochemical complex. The annual water supply reached 4.8 hm3 in 2017. Reclaimed water quality monitoring has been conducted in accordance to industrial specific requirements, Spanish regulations (Royal Decree 1620/2007) and regional public health authorities’ specifications.
This paper summarizes the lessons learned from the continuous operation of the AWRP, the follow-up of reclaimed water quality in the distribution network and the end users assessment of using reclaimed water for cooling water systems and high-pressure boilers. The lessons learned involve the RO pretreatment processes, the RO fouling and cleaning processes, the quality assurance program for reclaimed water, the production of highly demineralized water, and the operation and maintenance of the whole project. In addition, the paper presents several new monitoring tools currently been developed to evaluate microbiological issues affecting the reclaimed water distribution network.
Management experience on using reclaimed water for cooling water systems is also presented, particularly considering its microbiological activity risk and corrosive character. Finally, the paper offers conclusions and recommendations based on the results gathered during more than six years of production, distribution and use of advanced reclaimed water at a large petrochemical industrial site.
Condensate reuse in the chemical industry - pilot scale experience
Dr. Marjolein Vanoppen | Ghent University (UGent) | Belgium
Within the Interreg Vlaanderen-Nederland project IMPROVED, the treatment of two different condensates for reuse within the boiler system was investigated. Three technologies (reverse osmosis, electrodialysis and membrane destillation) were tested both on laboratory and pilot-scale. Their feasibility was assessed based on technological performance and cost effectiveness.
Advanced Zero Liquid Discharge concept for the chemical industry
Dr. Jozef Kochan | 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.