CSRO+CSEDI (Chemical Sanitizable Reverse Osmosis + Chemical Sanitizable Electrodeionization) Plant is a combination water treatment system used for the desalination of seawater. It integrates the processes of Chemical Sanitizable reverse osmosis (RO) and Chemical Sanitizable electrodeionization (CEDI) to produce high-quality freshwater from saline water sources.

System Components and Process Steps

Pre-Treatment : The seawater undergoes pre-treatment processes to remove suspend solids, sediment, algae, and other larger particles that may clog or foul the RO membranes. Pre-treatment may include processes such as screening, sedimentation, and filtration.
Chemical Sanitizable Reverse Osmosis (CSRO): The pre-treated seawater is pressurize and pass through a series of RO membranes. The RO membranes act as a barrier, allowing water molecules to pass through while rejecting dissolve salts, minerals, and other impurities. The purifie water, known as permeate, passes through the RO membranes, while the concentrate brine, containing the rejected salts and impurities, is discharge.
Post-Treatment: The permeate from the CSRO process may undergo post-treatment processes to adjust the pH, remineralize, and stabilize the water quality before it is used or distribut. Post-treatment processes may include pH adjustment, remineralization, disinfection, and activate carbon filtration.
Chemical Sanitizable Electrodeionization (CSEDI): After the CSRO process, the permeate enters the CSEDI system for further purification. CSEDI employs ion exchange resins and an electric field to continuously remove remaining ions and impurities from the water. The CSEDI system consists of ion exchange resin and electrodes, similar to the principle describe in the EDI system. The electric field promotes ion migration and the removal of ions from the water, resulting in highly purifie water with low levels of dissolved ions.
Product Water: The purifie water collect after the CSEDI process is consider the product water, which has a significantly reduce concentration of dissolve salts, minerals, and other impurities. It is suitable for various applications, including drinking water supply, industrial processes, and irrigation.

Significance & Advantages

High Purity and Reliability : The combined CSRO+CSEDI process ensures the production of high-quality freshwater with low levels of dissolve salts and impurities. The CSEDI step further enhances water purity and removes residual ions.
Energy Efficiency : CSRO+CSEDI Plants can operate at lower energy requirements compared to standalone RO systems by utilizing the continuous electrochemical regeneration of the ion exchange resins in CSEDI instead of traditional chemical regeneration.
Reduced Chemical Usage : The continuous regeneration in CSEDI eliminates the need for periodic chemical regenerants, reducing chemical handling and disposal requirements.
Lower Environmental Impact : CSRO+CSEDI Plants produce less brine waste compared to traditional thermal desalination processes, reducing the environmental impact on marine ecosystems.
It is important to note that the design and configuration of CSRO+CSEDI Plants may vary base on specific project requirements, feedwater characteristics, and desire water quality. Regular maintenance and monitoring are essential to ensure the optimal performance and longevity of the plant.