Concentrating RO brine even further requires thermal systems, such as evaporators or crystallizers. Although they cost more than RO systems, thermal systems can reduce RO brine to zero liquid discharge solids. Maximizing upstream RO recovery will minimize the size and operating cost of your thermal treatment steps.
This can be done by using a treatment strategy that minimizes the use of chemical pre-treatment; any chemicals added upstream in a treatment process will cause greater impacts on overall economics further downstream. You can avoid adding chemicals by choosing treatment technologies that do not rely on extensive pretreatment, such as intelligent RO systems or EDR with membranes that resist organics. Alternatively, you can use BrineRefine’s intelligent chemical softening for precise dosing to both prevent scaling and avoid chemical overdosing.