pre-treatment system

一、Multi-filter
　　The particle diameter is about 10-4mm or more. it is visible by eyes .

these particles mainly included silt, clay, protozoa, algae, bacteria, viruses, and high composed of organic molecules, often floating in the water to make the water turbid.

       The pre-filters can remove sedimentp ,particles and suspended solids in the feed water , by using quartz sand, anthracite filter media, mult-media and manganese sand filter with special filter elements. System provide protection devices and monitoring instruments, and also have backwashing function ,will remove dirt and other pollutants, small consumption, automatic operation .

Working pressure(Mpa)	≤0.6	Output water turbidity (mg/L)		0.5~3
Working temperature(C)	5~50	Strength Backwashing (L/M2.S)	Quartz sand	15~18
Flow rate(m/h)	8~12		Anthracite	10~12
Input water turbidity(mg/L)	≤20		Multi-media	12~16

●odor of smell of gas dissolved in water，such as SO2, H2S, and NH3.

●odor of industrial wastewater discharged into the water.

●odor when it add chlorine in the disinfect process.

    Its basic features is strong absorption and has a lot of invisible holes in the soot surface, can remove variety of odor, pigment, organic maters and chlorine in water. After treatment, through the filtered it would be colorless ,no smell ,no odor and very clear .

三、Precision filter
　　The precision filter was consist of a variety of precision filter ,it was replace when use 1- 3 months or water pressure is more than 0.1MPa ,the purpose is to retain impurities in the liquid

and particles and ensure pretreatment effect ,to avoid damage of reverse osmosis membrane from particles , suspended matter .