Water Filtering Systems

Water Filtering Systems

Water filtering systems remove contaminants from water through the use of a thin obstruction, various chemicals, or other methods. While most commonly used for the purification of drinking water, filtered water is also used for other various purposes, such as in aquariums, irrigation, and swimming pools. Wastewater is also often filtered to remove excess particles.

There are several different methods of filtering water. Electrodialysis (ED), for instance, uses membranes to desalt or electrically concentrate solutions by allowing passage of either the positively or negatively charged ions, into which the salt was dissociated, while excluding passage of ions of the opposite charge. The membranes and other active surfaces have a tendency to become fouled or scaled. Electrodialysis reversal (EDR), on the other hand, deals with this problem by reversing the electrical current and exchanging the fresh product water and the concentrate wastewater streams within the membrane stack many times per hour. This process removes the fouling and scaling constituents from one cycle to the next. Reverse osmosis (RO) is a cost-effective pretreatment for ion-exchange demineralization that unloads 95-99 percent of dissolved salts, TOC and silica from the water supply. RO is a multi-stage process in which cylindrical pressure vessels house interconnected cellophane-like membrane elements with hole sizes of less than .0002 microns, through which incoming dirty water is forced. Other common water filtering methods include electrodeionization (EDI) and ultrafiltration (UF).

Water filtering systems are necessary to purify contaminated or unclean water. Water filtration is common in the wastewater/sewage treatment, food and beverage processing, automotive/trucking, agricultural, pharmaceutical, chemical, mining, and pulp and paper industries.

Water Filtering Systems Images Provided by Aquasana Water Filters