Slaughterhouse Wastewater Treatment With Application of the GACS Method of Zeologic S.A.


General Information
Volume and pollutant load of wastewater generated from slaughterhouses is dependent on raw materials (animal species), plant’s size (from simple animal slaughterhouses to mixed processing plants that include slaughterhouses, meat processing, packaging and canning of finished product), and as well on the implemented cleaning methods.
At any of these cases, wastewater of this type shows high concentrations of pollutants such as:
  • organic carbon,
  • suspended solids,
  • pathogen microorganisms,
  • nitrogen/ammonia,
  • phosphorus,
  • salts,
  • fats and oils.

Slaughterhouse wastewater derives from the following procedures:
  • Loss of blood during slaughtering and drainage of animals – poultry
  • Slaughterhouse cleaning
  • Cleaning of the waiting stall of animals – poultry
  • Cleaning of transport trucks of animals – poultry
  • Water loss during cooling of condensers and refrigerator machines
  • Cleaning of the facilities

Wastewater volume in large-sized slaughterhouses has been measured around 7-9 m3/ton of living weight. Average values for BOD5 usually are measured around 4,0 – 8,0 kg/ton of living weight, or 1850 – 3500 mg/lit and for suspended solids around 930 mg/lit.
Respectively, wastewater volume in large poultry slaughterhouses, has been determined in 22,50 lit/bird. Average value for BOD5 usually are measured around 15,03 g/fowl and for suspended solids around 15,40 g/fowl.
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 slaughterhouse 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 olive processing 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.
  • Effluent complying with legislation
  • Production of inert sludge
  • Use of natural materials
  • Elimination of odors