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The advantage as follows
1. Big voids on the surface of ball, normally, its filtering velocity is 15-20m3/h, with small head loss; it lowers filtering tank鈥檚 height and saves electric power and infrastructure expense.
2. Because of even and regular in particle size, making it easy to be cleaned, the back-flush strength is 12-20 l/m2, so the water consumption could be reduced 30-50锛.
3. Large surface area and pore volume; strong decontamination capacity, generally with 9锝10kg/m3, it is as 1.2 ~ 1.5 times as quartz sand filtering.
4. High strength; small abrasion; usage life is over 15 years.
5. Well distributed; easily packed; uneasy to wash away; none secondary pollution; it is applicable for ion exchange, mechanical filter, valveless filter chamber, reverse osmosis system. It is usually pretreatment or supporting layer in reverse osmosis system which used for supporting layer of activated carbon adsorption.