BSN Medical Building

Durban, South Africa | 2017

BSN Medical in South Africa a multinational company recently embarked on a global green initiative with the objective of reducing their impact on the environment as well as reducing their operational costs.

Tizagenix rainwater division was selected to design and install a mega rainwater harvesting system at their Pinetown factory in Durban South Africa.

The objective of the project was to design and install a rainwater harvesting system for their factory to recover rainwater from hard-surface areas totalling 16,000 m². Rainwater recovered from the factory roof drain into a 500mm storm-water pipe system 3.5 m below ground where it had to be recovered filtered and transferred to an above ground rainwater storage tank. From the storage tank the water had to be treated and used as process water for boilers, cooling towers and other non potable process water applications.

Please see for more information the detailed project report from Tizagenix

Object Data

Annual rainfall [mm = litres / m²]
1,000
Roof surface [m²]
16,000
Cistern capacity [m³]
500
Planning

Tizagenix (Pty) Ltd t/a

Components

Cistern

Above ground rainwater storage tank with ability to expand to 1,000 m³.

Filter

4 x Vortex Fine Filter WFF 300, mesh size: 0.38 mm

Usage

Watertype
Rainwater
Waterusage
Process water for boilers, cooling towers and other non potable process water applications.

Specific Characteristics

  • Specified maximum demand flow rate for plant process water: 10 m³/hr (166.67 liters/min)
  • Average daily process water consumption: 50,000 to 70,000 liters.
  • Payback period of less than 5 years.