Manganese sand for water supply
Manganese sand must be able to be filtered and washed 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
Manganese sand is obtained by adhering manganese dioxide on the surface of filtered sand for water supply, and the main component of the adhering matter is manganese dioxide.
1.2 Quality (physical properties)
Quality (physical properties) shall be tested according to JWWA A 103-3: 2006-2 6.4.1 and 6.4.2 and shall comply with the provisions of Table 1.
1.3 Quality (exudability)
Quality (exudability) shall be tested according to JWWA A 103-3: 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)||2.57 ～ 2.67||JWWA A 103-3:6.4.1|
|Manganese adhesion (mg/g)||0.3 or more||JWWA A 103-3:6.4.2|
|Exudative||taste||Not abnormal||JWWA A 103-3:6.5|
|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|
The dimensions shall be tested according to JWWA A 103-3: 2006-2 6.6.1 and comply with the provisions of Table 2 and the requirements set by the purchaser.
● Table 2-Dimensions
|item||Dimensional regulation||Applicable test clause|
|Effective diameter (mm)||0.45 ～ 0.7||JWWA A 103-3: 6.6.1|
|Equal coefficient||1.7 or less|
|Maximum diameter (mm)||2.0 or less|
|Minimum diameter (mm)||0.3 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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