CASE STUDY: Brackish Water RO Plant for Laundry

Pretoria Laundry Feature


Brackish Water Reverse Osmosis Plant for Industrial Laundry in Gauteng, South Africa.


Our client is a South African Industrial Laundry who uses borehole water for its washing operations and boiler feed water. While the borehole water quality was compliant with SANS 241:2015 Drinking Water specification, the total dissolved solids (TDS) and hardness was too high for efficient use in the Laundry. A softener system was previously installed which reduced the water hardness to acceptable levels. However, the TDS was not reduced and the softener operation was expensive due to the demand of high concentration salt water (brine) for regeneration of the softener plant. The TDS included dissolved Iron which uses some of the peroxide of the washing chemicals and therefore causes higher chemical usage in the Laundry.


Kainos Projects Africa provided a brackish water reverse osmosis water treatment plant (10 m3/h) to our client, which, together with raw borehole water blending, now provides the laundry with optimum water quality and quantity (13 m3/h) for its operations. Additional value was added with less boiler feed water chemicals now required. Our standardised range of brackish water RO plants for capacities between 1 and 20 m3/h enabled us to provide a quick delivery time to our client.


Brackish borehole water


  • TDS: 150-200 mg/L (RO plant gives ~20 mg/L)
  • pH: neutral
  • Total Hardness (as CaCO3): <5 mg/L
  • Dissolved Iron: <0.1mg/L


  • Antiscalant Dosing
  • Reverse Osmosis
  • Integrated CIP