The dairy industry has a worldwide importance since it is an
essential contributor to human nutrition and has a high economic
value. In the dairy industry, raw milk is transformed to milk, yogurt,
cheese, butter, ice cream, milk powder and various types of desserts
by various manufacturing processes. Wastewater is generated by
washing of milking equipment and milk containers, quality control
laboratory analyses, and from by-products of whey, cheese, and
ice-cream making processes. Major constituents of dairy wastewater
are lactose, soluble proteins, lipids, mineral salts and detergents
while low concentrations of some heavy metals have been reported
in wastewater from control laboratories [1–3]. Dairy wastewater
is generally characterized by its relatively elevated temperature
(30–40 ◦C) and high strength with its COD concentration up to
80 g L−1