Friday, August 1, 2008

Hardness


Degree of hardness for all results are in between 0 to 75mg/L. Hence, they fall within the acceptable range.

The hardness of water in Inlet C1 is the highest, the grease trap being the second highest. This is due to the detergent or soaps containing hardness-causing ions in the Grease Trap.

From the grease trap, the water travels through the phytoremediation system(PS) which contains soil, stones and plants. Perhaps the calcium ions from the stones gets washed away by the water passing through the PS and a large concentration of hardness-causing calcium ions ends up in the water of Inlet C1, resulting in the high value for hardness.

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