Organic Waste Recycling

Characteristics of organic wastes 49

Figure 2.8 Fundamental processes in a slaughterhouse (Nemerow 1971) (© 1971,
Addison-Wesley Publishing Co., Reading, Mass)

The major problem is the flow of the effluent stream not being constant. Little
water is used whilst production is under way, but when a batch is complete a lot of
water is used to wash down. The additives vary and so does production. In order to
treat the effluents properly it is necessary in each case to study and to understand
the variations in the process and the waste characteristics.

Live

animals Killing

Hide removal

Hog dehairing

Evisceration

Blood

Hides

Boning, cutting and

grinding

Inedible rendering

Edible rendering

Paunch removal

Sausage

By-products Pollution

Tripe

Lards and edible

tallows

Inedible tallows,

greases and tankage

Fresh meat

Scraps