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Anthracite Filter Media for water supply

Anthracite must be able to perform filtration and cleaning in the filtration pond in a stable and efficient manner, and must comply with the regulations of 1.1 main component, 1.2 quality (physical properties) and 1.3 quality (leaching property).

1. Principal component and quality

1.1 Main component
The main component of anthracite is crushed high-quality anthracite coal, which has the highest carbonization, and is made into sand granules.

1.2 Quality (physical properties)
Quality (physical properties) shall be tested according to JWWA A 103-2: 2006-2 6.4.1-6.4.3 and shall comply with the provisions of Table 1.

1.3 Quality (exudability)
Quality (exudability) shall be tested according to JWWA A 103-2: 2006-2 6.5 and shall comply with the provisions of Table 1.

● Table 1-Quality

item Quality regulations Applicable test clause
Physical properties density (g/cm3) 1.40 ~ 1.69 JWWA A 103-2:6.4.1
Abrasion rate (%) 3.0 or less JWWA A 103-2:6.4.2
Hydrochloric acid solubility (%) 6.0 or less JWWA A 103-2:6.4.3
Exudative taste Not abnormal JWWA A 103-2:6.5
Odor Not abnormal
Saturation (degree) 0.5 or less
Turbidity (degree) 0.2 or less
Iron and its compounds (mg/L) 0.03 or less
Manganese and its compounds (mg/L) 0.005 or less

2. Appearance and dimensions

2.1 Appearance
Appearance shall be tested according to JWWA A 103-2: 2006-2 6.6.1 and comply with the provisions of Table 2.

2.2 Dimensions
The dimensions shall be tested according to JWWA A 103-2: 2006-2 6.6.2 and comply with the provisions of Table 2 and the requirements set by the purchaser.

●Table 2-Appearance and dimensions

item Appearance and dimensions Applicable test clause
appearance appearance Fine powder, flat, scaly or crushed stone, peat and other contaminants with low content JWWA A 103-2:6.6.1
Size Effective diameter (mm) 0.7 ~ 1.5 JWWA A 103-2:6.6.2
Equal coefficient 1.5 or less
Maximum diameter (mm) 2.8 or less
Minimum diameter (mm) 0.5 or more

Quote: Japan Water Works Association Standard JWWA Water Supply Filter Material A-103: 2006-2
Revised on March 30, 2006

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