YES, DM plants are used to produce demineralized water. The higher the feed water TDS, the higher is the chemical consumption for regeneration.While in Reverse Osmosis, there is no need for any regeneration. Above 500 ppm inlet water TDS, the operating cost of an Reverse Osmosis system is lower than that of a DM system , and the cost increases with increasing TDS for a DM plant.

Therefore we should use a Reverse Osmosis system if the inlet TDS is > 500 ppm.If the outlet water quality required is lower than that achievable in a single pass Reverse Osmosis system, it is more economical to have either of the following schemes.

Ultrafiltration is a complimentary process to reverse osmosis where dissolved salts are not removed from water , which means there is no change in the chemical composition of the product water from an Ultrafiltration system. Large molecular weight organics ( 1000 daltons- 100,000 daltons) bacteria, colloids, viruses and other substances are removed from the water.This produces sparkling clear safe water.

The three main applications in water treatment are

• Bottled water production where feed water TDS is within limits, but clarity and disinfection is required.
• Pretreatment to reverse osmosis systems to enhance life of the Reverse Osmosis membranes and protect them form fouling.It is a single stage step process which eliminates, settling, sand filtration and polishing cartridge filtration.
• Domestic water purifier for producing sparkling, crystal clear, safe drinking water without electricity, chemicals and Ultraviolet rays

Yes, with Permionics's Proprietary ultrafiltration/ nanofiltration membrane elements used as pretreatment followed by a reverse osmosis system can effectively recycle waste water at least upto 70%. The balance rejected waste has to be solar/ steam evaporated.

Yes, We have supplied several systems to recover expensive products from washings and mother liquors. The membranes concentrate the solute and remove water. The lower volume and higher concentration makes it possible to recover the products. The fact that membrane systems do not require the latent heat to remove water, there is a direct energy saving of 80-90% when you use membranes to remove water. The added advantage is that there is no heat damage to products.The savings in operating cost itself pay back for the system in less than a year.

Whey is produced in the manufacturer of cheese, paneer, and casein. It normally is drained and creates a very high effluent load. Perma ultrafiltration membranes have excellent selectivity to whey proteins and produce protein free lactose permeates and a rich concentrate of Whey protein Concentrate ( WPC). This reduces the pollution load on your ETP apart from converting waste into saleable WPC and Lactose.