ABSTRACT
Drainage from dairy parlors and milk factories produced in the process of cleaning transport pipes and milking tanks pollute rivers and groundwater with detergents, bactericides, mucus and milk fat are contaminating rivers and underground water [1]. In low temperature conditions, the wastewater is treated by bio-filters [2] and a reed bed system [3], [4]. However, the system is not used widely because of the high running cost and the necessity of a large space. Instead, an activated sludge system is now widely used for industrial treatment of dairy parlor wastewater [5] due to its advantages in maintenance and running cost. However, there is a problem in
this system of low temperature conditions in winter having adverse effects on microbial functions.
