Background
Polyfoam Australia was having issues with corrosion, scale and constant blowdown required for their boiler. The cooling tower was also having issues from poor water quality and subsequent biological growth. This is resulting in high water usage and maintenance costs.
Regular scheme water contains enough impurities to allow them to cycle up in the boilers and cooling towers causing corrosion, scale, high water usage and premature maintenance requirements. Reverse osmosis removes these impurities, preventing scale, reducing maintenance and extending the life of injection moulds.
MAK Water were engaged to build a Demineralised Water Reverse Osmosis (RO) Plant to provide high quality, demineralised, water to boiler and cooling tower.
Solution
MAK Water had previously built a number of wastewater treatment systems for similar industrial applications, and recommended a dissolved air flotation (DAF) process, with secondary polishing and disinfection, as the most suitable solution for reuse in the wash bay.
This was confirmed by bench-testing water samples during initial process design.
MAK Water Key Solutions
Dissolved air floatation wash bay Water Recycling System
- The system uses hydroxide precipitation, flocculation and DAF clarification to remove silt, heavy metals and oil and grease.
- Post-clarification treatment included multimedia filtration, pH neutralisation, UV and chlorine sterilisation to ensure the treated effluent met the stringent requirements of the NSW wash bay recycled water quality guidelines.
- Supply and installation of interconnecting pipework and electrical works prior to plant commissioning.
- Fast 10-12 week delivery time.
- Onsite commissioning and training of local operators, with an ongoing service and maintenance agreement.
Results and benefits
- Facility consolidation. Consolidation of 18 wash down points to one central facility.
- No need to use potable town water. Elimination of the use of potable town water for vehicle wash down.
- Environmental protection. Protection of the sewer and storm water systems from wash down water volumes and contaminants.
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