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