4 April, 2016
Harvesting rainwatermakes good business sense
rainwater makes good business sense in many parts of South Africa, and would
help many treatment plants ensure a sustainable supply of water. This is the word from Rainwater Invest, which has helped organisations as large
as Vodacom and Rand Water to assess or implement rainwater harvesting systems.
installation system by Rainwater Invest
Louis de Lange of Rainwater Invest says that a good system typically pays for
itself in four years. "However, for many companies, cost is no longer the main
issue," he observes. "They are investigating rainwater harvesting not just to
save on their bills, but to help ensure a continuous water supply. They simply
cannot afford to stop production because of water shortages."
Rainwater Invest's cutting-edge software calculates that a medium-sized
treatment plant in George or Sabie could harvest 30% of its annual water needs.
The optimal capacity for a plant of this size is a 40 kilolitre system.
These calculations apply to a plant using about 250 000 litres of water per
month, and with a roof size of about 1000m2. Rainwater Invest's software allows them to track rainfall trends in any part of
the country over the past 50 years, before predicting the future supply. They
also consider the organisation's water usage, water quality requirements, the
size of the catchment areas, and other factors important to the organisation, before
simulating the viability of various systems.
"Water harvesting is not equally beneficial everywhere in the country," says
Louis. "However, it is an important strategy to consider, if you want to ensure
that your company does not face water shortages at some point in the future."
Louis: 082 378 9181
Source: Dolphin Bay Chemicals