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Table L7:
266
Some South African industrial water consumption data including wastewater quality information (continued).
Industry Details
Dairy industry Dry milk products
11,8 m3 (continued) • milk powder t'"
8,7 m3 , cheese 23,0 m3 t·
t'"
1 • butter
•
1,5m
20,0 m3 t'1.
3 t"· 1,3 m3 t"·
• ice cream
• condensed milk
2,5
4,4 m
1,9
3 t"· 3,5 m3 t"·
Malt brewing Industry
N.Qm: An asterisk denotes items produced from raw milk, and the data include water consumed in the reception
stage. Data without an asterisk refer to products derived from intermediate materials. The reception function
was examined separately and a specific water usage of 0,6 volume/volume was determined for reception only,
with a proposed target of 0,4 volume/volume (based on the volume of raw milk received)
Most of the water consumed in the dairy industry is for cleaning operations. In this regard, the use of plastic
sachets rather than bottles was suggested, which would result in a considerable reduction in water consumption,
as well as a reduction in wastewater volumes and pollutant loads
In 1986 there were eight malt beer breweries in South Africa, which produced approximately 1,2 x 10 6 m 3 of
beer annually. Total annual water consumption was some 8,7 x 10 6 m 3 , with 65 ·70% of the water consumed,
being discharged as wastewater. The SWI varied between 5,5 ' 8,8 m 3 of water per m 3 of beer produced. A
target SWI of 6 m 3 of water per m 3 of beer for existing breweries, and 5 m 3 of water per m 3 of beer for new
breweries was suggested. The SPL was found to vary between 10,4 , 20,0 kg COD per m 3 of beer produced.
The target SPL for untreated wastewater was recommended as 10 kg COD per m 3 of beer produced for eXisting
breweries, and 7,5 kg COD per m 3 of beer produced for new breweries