PEBBLES
PEBBLES
Pebbles are natural, durable, and chemically inert supporting media used in water and wastewater filtration systems. Sourced from riverbeds, these pebbles are well-rounded and smooth, providing an ideal base for various filter media such as sand, anthracite, and activated carbon. Their primary function is to support the filter bed and prevent the loss of the finer media, ensuring a consistent and effective filtration process. They are critical components in the underdrain systems of gravity and pressure filters.
Applications
- Water treatment plants: Pebbles are used as a support layer in the base of sand and gravel filters for potable water purification.
- Industrial water filtration: Pebbles are essential in various processes requiring high-purity water, such as food and beverage production and electronics manufacturing.
- Swimming pool filtration: Pebbles provide a durable and effective underlayer for sand filters.
- Wastewater treatment: Pebbles act as an underdrain medium in tertiary treatment filters to support the filtration bed.
- Well and sump liners: Pebbles can be used to prevent the intrusion of fine sediments.
Physical and Chemical Characteristics
Silicon dioxide
Iron oxide
Aluminum oxide
Sodium oxide
Specific gravity
Uniform coefficient
Solubility rate in hydrochloric acid
Hardness
Sizes
Weight
: 99.4% SiO2
: <0.1% Fe2O3
: 0.1% Al2O3
: 0.1% Na2O
: 2.6 kg/l
: ≤1.5
: ≤0.2%
: 7.0
: 5~10 mm
: 25kg/sack
