Dairy Industry Wastewater Treatment With Application Of The GACS Method Of Zeologic S.A


General Information
Quantitative and qualitative characteristics of dairy industry wastewater depend mainly on the implemented type of procession and the produced products (milk, butter, cheese, ice cream), and are divided into two (2) categories:
  • Wastewater generated from personnel’s sanitary facilities
  • Wastewater generated from the production procedure that occurs from washing of containers, utensils, cheese, working places and losses of milk and product residues.

Pollutant load can be essentially reduced if the containers are drained systematically and by limiting product losses, since milk and its derivatives are characterized by an enormous pollutant load.
Table 1. Characteristics of wastewater from dairy industries
Type BOD5 mg/lt
Sheep’s milk (whole) 156.000
Goat’s milk (whole) 116.000
Cow’s milk (whole) 104.000
Cow’s milk (skimmed) 73.000
Cow’s milk (fat free) 67.000
Goat’s whey cheese 77.600
Cow’s buttermilk 68.000
Cow’s whey cheese 34.000
Cream 40% 399.000

The GACS Solution (Geochemical Active Clay Sediment)
The Geochemical Method GACS consists an innovative solution on an international level on the subject of treatment and disposal of dairy indusrty wastewater. The key characteristic of the Geochemical Method GACS is the usage of geopolymer materials, which have the ability to adapt on the characteristics and particularity of any type of waste. Under this manner, process optimization and performance maximization are achieved.
Benefits of the GACS Method, on treatment of dairy industry wastewater against the conventional existing methods can be summarized in the following:
Financial Benefits:
  • Competitive investment cost
  • Significantly reduced operational cost
  • Reduced maintenance cost
  • Reduced sludge production
  • Reduced operational time

Environmental Benefits:
  • Heavy metals removal even on high concentrations
  • Ability to treat whey cheese wastewater
  • Effluent complying with legislation, depending on its usage
  • Production of water that can be used for irrigation
  • Production of inert sludge which is suitable as soil fertilizer
  • Use of natural materials
  • Elimination of odors