The Water Reclamation Plant at Heineken South Africa’s Sedibeng Brewery
The visit by the Flemish-Belgian government led by His Excellency Minister-President Jan Jambon, was part of a showcase by Waterleau of its successful water projects in South Africa, of which the water treatment plant in Sedibeng is one.
Amongst the key stakeholders in attendance were the Midvaal executive mayor, Peter Teixeira; the diplomatic representative of the Government of Flanders in South Africa, Dr Geraldine Reymenants; City of Johannesburg councillor, Michael Sun; as well as the representatives from Rand Water and Johannesburg Water.
The Sedibeng Brewery water reclamation plant is one aspect of Heineken’s global Brew a Better World strategy for 2030. It aims to ‘drive progress towards a net zero, fairer and more balanced world’. This strategy is of immense benefit to local communities around its breweries, such as the Midvaal communities who were represented at the occasion, because of its critical goal of conserving local water supplies and wetlands.
“Central to this strategy is reducing Heineken’s reliance on local water supplies, by rather reclaiming used water. With this plant, up to 30% of the brewery water intake is saved, producing up to 45,000m³ per month of potable water, equivalent to 18 Olympic-sized swimming pools of water each month. Heineken, one of the major brewers in Africa and the world, has done over 30 such projects across Africa with Waterleau Group,” said Vinicius Genio de Almeida, Heineken South Africa’s Supply Chain director. De Almeida noted that the food and beverage sector needs large amounts of water for production, and as Southern Africa is ranked by Bloomberg as becoming one of the most drought stressed regions in the world by 2050, Heineken sought such innovative solutions to reduce its water usage.
De Almeida also noted that the company’s investment in local infrastructure was part of its commitment made to President Cyril Ramaphosa at the government’s annual investment conferences. Water is central to local communities but also key to the beer brewing process: “The brewery produces eight million hectolitres of beer and other products annually. Each bottle of beer requires four litres of water. The goal of this project was therefore to reduce the water content from four litres per bottle to 2.5 litres. This project talks to the responsibility Heineken has to the environment and local communities.”
Delegation including the Flanders Government, and local key stakeholders
Jambon described the involvement of his government as being one of its initiatives to combat the impact of climate change on the environment. “This is best achieved, as with this project, in implementing effective technology and innovations. We see our contribution as developing such technologies locally in Flanders, and then taking these to the rest of the world in this manner.”
Water recovery has become ever more accessible in recent years in the food and beverage industry as the technology has evolved to be able to provide the extremely high-quality standard required in a brewery.
Bart Goedseels, CEO of Waterleau, described the technology of the effluent treatment plant. “It consists of anaerobic and aerobic technology, not only purifying the effluent up to river discharge limits, but also converting this pollution into biogas. The water discharge limits are strict, with chemical oxygen demand below 75ppm (parts per million) and suspended solids below 15ppm. Furthermore, all nitrogen and phosphorus is removed.”
This biogas on the other hand is collected in the anaerobic treatment stage and sent back to the brewery boilers. At full production capacity, it saves 15-20% of the brewery’s natural gas demand. Instead of sending the purified effluent to discharge, we then added the water reclamation plant. In this plant, the water is further treated up to potable water standards, by ultrafiltration and reverse osmosis.
In these steps, all the last pollutants are taken out of the water, resulting in 100% pathogen and virus free drinking water following the strictest World Health Organisation standards, it is only used as utilities water in the brewery. Though the water is not used by the community as drinking water, it nonetheless reduces demand on community drinking water resources, resulting in less drought stress on the region.
Mayor Teixeira acknowledged Heineken and the Flanders government, saying his municipality had considerable interest in such technologies to improve access to water.