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2.6.1.Biological and Non-Biological Wastes
Unit 2 : Sewage and domestic wastes, treatment and reuse
2.6.1.Biological and Non-Biological Wastes
Biological wastes are those which originate primarily from living or previously living sources, for example: sewage and discharges from tanneries, paper and pulp mills, food processing plants, slaughter houses, sugar mills, distilleries and breweries etc. Such wastes have a predominance of degradable organic matter.
The non-biological wastes are rich in non-degradable matter consisting of solids and liquids in suspended or dissolved form, including various inorganics and organics.
Example: Industrial contaminants-acids and bases
Acids: HCl, H2SO4, phosphoric and hydrofluoric
Bases: NaOH, Ca2OH, NH3OH, cyanides, metals and salts, sodium bicarbonate, benzene, ether etc.
Non-Biological Waste