View/Open - University of Zululand Institutional Repository

Table L7:
268
Some South African industrial water consumption data including wastewater quality Information (continued).
Industry Details
Edible oils industry Sixteen edible oil processing plants in South Africa produce some 250 000 t of edible oil each year, with an
annual consumption of approximately 1,5 x 10 6 m 3 of water. The SWI varied between 2,1 • 31m 3 of water
per tonne for milling, and 3,2 - 4,6 m 3 of water per tonne for refining, A target SWI of 2,0 m3 of water per
tonne for milling, and 3,0 m 3 of water per tonne for refining was suggested. A target SWI of 5,0 m 3 of water
per tonne for a plant milling and refining all product oil on site, was recommended. The SPL ranged from 4,3 •
13,8 kg COD per tonne of oil and 10,1 • 24,8 kg total dissolved solids per tonne of oil. A target SPL of 7,0 kg
COD per tonne of oil and 12,0 kg total dissolved solids per tonne of oil was suggested, for a plant milling and
refining all product oil on site
Red meet industry A total of 285 red meat abattoirs in South Africa slaughter some 11 x 10 6 animals and consume 5,8 x 10 6 m 3
of water on an annual basis. Wastewater volumes generally constitute 80 - 85% of the water intake, with an
annual wastewater discharge for the industry as a whole, of some 4,9 x 10 6 m 3 , The mean SWI was 1,36 m 3
of water per Water Related Cattle Unit (WRCU) for A grade abattoirs, and 2,04 m 3 of water per WRCU for other
grade abattoirs. A target SWI of 1,1 m 3 of water per WRCU for A grade abattoirs and 1,75 m 3 of water per
WRCU for other grade abattoirs was suggested. The mean SPL for A grade abattoirs was 5,2 kg COD per
WRCU and 1,6 kg suspended solids per WRCU. For other grade abattoirs, the mean SPL was 8,5 kg COD per
WRCU and 1,4 kg suspended solids per WRCU. A target SPL of 4,0 kg COD per WRCU and 1,0 kg suspended
solids per WRCU for A grade abattoirs, as well as 5,0 kg COD per WRCU and 1,0 kg suspended solids per
WRCU for other grade abattoirs, was recommended
White meet industry A total of 140 poultry abattoirs operate in South Africa, slaughtering some 330 x 10 6 birds on an annual basis.
The annual water consumption is of the order of 6,0 x 10 6 m 3 . The weighted mean SWI was 17 f per bird for
AP grade abattoirs, and 20 f per bird for other poultry abattoirs (within a range of 15 - 20 f per bird for AP
grade abattoirs and 15 - 30 f per bird for other grade abattoirs), A target SWI of 15 e per bird (for AP grade
abattoirs) and 20 f per bird for other grade abattoirs was recommended, The weighted mean SPL was 29 g
COD per bird and 7 g suspended solids per bird for AP grade abattoirs, and 64 g COD per bird and 14 g
suspended solids per bird for other grade abattoirs. A target SPL of 29 g COD per bird and 7 g suspended solids
per bird for AP grade abattoirs was suggested. A target SPL for other grade abattoirs of 64 g COD per bird and
14 g suspended solids per bird was recommended