KWI pre-treatment processes such as ceramic UF can effectively remove biological, organic and other particulate contaminants, which, if left untreated, can result in problems such as biofouling on RO membrane surface. A unique process combination of DAF and ceramic membranes can extend the RO membrane lifespan to 8 years or more. According to a financial analysis model, DAF and ceramic are the most economic and best pre-treatment combination for operation and maintenance durations longer than 20 years.
Stable effluent water quality
Long lifespan (more than 20 years)
Lower operating costs due to lower backwash requirements and chemical treatment (less than 50%)
Seawater filtration rack design: non-metallic parts and corrosion-free
High flux 250-300 LMH
High recovery rate > 98%
Effluent Water Quality SDI < 2
KWI dissolved air flotation is one of the most successful processes for handling both algae and suspended solids and combined with ceramic UF membranes will contribute to the reduction of organic materials being carried forward to the RO membranes. KWI has broad expertise in supplying both package and large DAF systems to desalination plants in the Middle East, South America and Asia.