Hulamin harvests rainwater

2011-03-04 00:00

AMID growing concern about South Africa’s scarce water resources, a local manufacturing company has taken a bold step and installed “green” technology at its Willowton plant.

Hulamin Containers has had four 5 000-litre rain water storage tanks installed to harvest rainwater off the plant’s 4 000-square-metre roof. The tanks have been plumbed into the premises’ water system and once the high water level is reached, they will supply water for all company’s needs, except drinking water.

Hulamin Containers operations manager Ian Ward said: “Rainwater harvesting is the oldest water supply technology known to man. In some parts of the world it is the sole source of water supply.

“The main reason for installing this system is to guarantee continued operations in the event of an interruption in supply.

“Our calculations show that we could harvest 3038,4 kilolitres per annum. Our monthly consumption is approximately 200 kilolitres, so the payback on the investment should be within three to four years if we replace all the municipal supply except for drinking water. This should also help to ease the burden on the already overstretched municipal water supply system.”

The rainwater tanks and pump system were installed by Graham Mallen of Will Forsyth Plumbers in Hilton, who said that apart from money, rainwater also saves potable water considering that “every flush of a toilet uses up to nine litres of valuable municipal water.”

Mallen said rain water harvesting is affordable to install and readily available in KZN.

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