Reverse Osmosis concentrate treatment
Global water shortages due to droughts and population growth have created increasing interest in water reuse and recycling. Pressured membrane processes, in particular, reverse osmosis (RO), are well-established technologies in water treatment. However, the drawbacks of RO membrane filtration include high energy consumption and operational costs.
In addition, the volume of RO concentrate (reject) produced by RO systems is significant and, in most cases, contain high levels of contaminants. Typical TDS concentrations in RO concentrate are often in the range of 30,000 – 50,000 mg/ litre. The salts in the solution can range from highly soluble sodium and potassium salts to less soluble or reverse-soluble calcium and barium salts.
Robust membrane solutions for RO Concentrate treatment
Berghof Membranes delivers robust products and solutions capable of reducing the RO concentrate volume and, in combination with other technologies, can achieve minimal or even zero liquid discharge (ZLD).
Our membrane-based solutions are less energy intensive when compared to other treatment technologies, therefore improving operational expenditures (OPEX).
RO Concentrate treatment from Berghof Membranes
Berghof Membranes offers a complete line of membrane solutions, engineering and commissioning for various industries. See below a related reference installation using this technology.
Kunshan Zhong Yan Company, located in Kunshan City in China’s Jiangsu province, manufactures 600,000 tons of sodium carbonate (also known as “soda ash”) per year.
In order to meet stringent water reuse standards, the Kunshan plant set out to find a cost-effective solution to treat its reverse osmosis (RO) concentrate and improve overall RO system recovery.
Ultimately, the company’s goal was to achieve zero liquid discharge (ZLD), recycling treated water back into the process stream and reducing the amount of concentrate that is ultimately routed to the evaporator/crystallization system.