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Table L7:
Some South African industrial water consumption data including wastewater quality information.
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Industry Details
Soft drinks and The numerous carbonated soft drink bottling and canning plants, dairies and fruit juice packaging plants in South
carbonated waters Africa, produce some 1,5 x 10 6 m 3 of soft drink on an annual basis. Fruit juice plants and dairies are responsible
Industry for 5% and 10% of the total volume respectively, with the balance produced by the carbonated soft drink
bottling and canning plants. A total annual consumption of approximately 4,0 x 10 6 m 3 of water, of which 60 -
80% is discharged as wastewater, was evident. The mean SWI (Specific Water Intakel was 2,7 m 3 of water
per m 3 of soft drink, with a recommended target SWI of 2,3 m 3 of water per m 3 of soft drink produced. The
mean SPL (Specific Pollution Load) was 4,0 kg COD (Chemical Oxygen Demand) per m 3 of soft drink, with a
suggested target SPL for untreated wastewater of 3,5 kg COD per m 3 of soft drink. A target of 5 kg total
dissolved solids (salts) per m 3 of soft drink for plants with bottle washers, and a target of 1,6 kg total dissolved
solids per m 3 of soft drink for plantS without bottle washers, was suggested
Dairy Industry Over 150 dairies in South Africa consume approximately 4,6 x 10 6 m 3 of water annually, of which 75 - 95% is
discharged as wastewater. The relevant data are summarized below:
Category SWI Target SWI
(volume/volume unless
otherwise indicated)
Pasteurised milk 1,a· 0,76·
(bulk production)
Pasteurised milk packed in
- sachets 1,7* 1,' *
- cartons 2,2· 1,6·
- bottles 3,0· 2,0·
Other milk products in cartons or
plastic tubs
- cultured products 10,2 a,3
- fruit juices and mixes 2,7 1,7
- sterilized/UHT products 3,7 2,0
- skim milk 3,a· 2,1·