• The increased automation in carcasses dressing together with the incorporation of washing at every stage (scalding, bleeding, evisceration and tripe treatment) have increased water consumption in slaughterhouse facilities.
  • Wastewaters are normally subjected to a primary treatment which generally includes the use of screens, settlers and fat separators.
  • Some slaughterhouse wastewater treatment plants (WWTP) have a secondary anaerobic reactor, usually based on upflow anaerobic sludge blanket (UASB) or expanded granular sludge bed (EGSB) reactor systems, due to the high organic content of the intake.
  • Several successful experiments at laboratory, pilot and industrial scale with such wastewater and reactor configurations are reported in the literature (Kim and Shin, 2010).​
  • The slaughterhouse also produced other waste streams, such as waste blood, waste from the slaughterhouse wastewater treatment plant (WWTP) and wastewater, which correspond to 82% of total waste production.
  • The WWTP at the slaughterhouse consisted of a primary treatment facility that included several screens and a dissolved air flotation system (DAF).
  • Consequently, screened waste and DAF sludge were also considered as waste material flows in the present assays.
  • Bacterial counts ranged from 4.8 × 10^6 to 5.8 × 10^5 /100 ml of total coliform (TC), 8.2 × 10^4 to 3.2 × 10^4/100 ml of Fecal coliform (FC),  5.2 × 10^4 to 2.0 × 10^4/100 ml of Fecal streptococcus and 1.2 × 10^4 to 2.0 × 10^3/100 ml of Escherichia coli for abattoir effluents.
  • Pathogens present in animal carcasses or shed in animal wastes may include rotaviruses, hepatitis E virus, Salmonella spp., E. coli O157 : H7, Yersinia enterocolitica, Campylobacter spp., Cryptosporidium parvum, and Giardia lamblia
  • The average quality of the generated wastewater could be characterised as having a total COD of around 7300 mg dm_3, highly soluble in nature, a low BOD5/COD ratio of 0.44, a significant total N (TKN) concentration of 690mg dm_3 and a total P concentration of only 3.3mg dm_3, very much below the level that would be required to sustain biological treatment.

  • Biochemical Oxygen Demand (BOD) and suspended solids of less than 30 mg/L,
  • Total nitrogen should be less than 15 mg/L and total phosphorus less than 5 mg/L.
  • Where no direct human contact with the water is anticipated, then the level of thermo-tolerant coliforms can rise to not more than 1,000 per 100 ml.


  1. Dilute SILVCLEAN 10 ml / L and spray liberally on the solid wastes daily and the entire working areas once a week.
  2. Dilute OXIFORTE 2.5 gm/ L and sprinkle liberally on the solid wastes daily and the entire working areas once a week.
  3. Dilute FLYMGTOFF 5 ml / L and spray liberally on the solid wastes daily and the entire working areas once in three days.
  4. Dilute MSW 365 2.5 gm / L and sprinkle liberally on the solid wastes daily and the entire working areas once in 10 days.

  1. USE SILVCLEAN 10 ml / KL / Day
  2. USE OXIFORTE  5 gm / KL / Day
  3. USE SHWWTP 2.5 gm / KL / Day
  4. USE TRIFLOC (PAC, Chitosan and Botanical extract) 1 gm / KL /Day



  • Slaughterhouse wastewater is very harmful to the environment.
  • Effluent discharge from slaughterhouses has caused the deoxygenation of rivers (Quinn and Farlane 1989) and the contamination of groundwater (Sangodoyin and Agbawhe 1992).
  • Blood, one of the major dissolved pollutants in slaughterhouse wastewater, has a chemical oxygen demand (COD) of 375 000 mg/L (Tritt and Schuchardt 1992).
  • Slaughterhouse wastewater also contains high concentrations of suspended solids (SS), including pieces of fat, grease, hair, feathers, flesh, manure, grit, and undigested feed (Bull et al. 1982).
  • These insoluble and slowly biodegradable SS represented 50% of the pollution charge in screened (1 mm) slaughterhouse wastewater, while another 25% originated from colloidal solids (Sayed et al. 1988). 
  • Meat can be rendered into Meat Meal
  • Bones can be calcined into Calcined Bone Meal
  • Intestines can be used as Animal Casings
  • Hair can be used to produce Protein Hydrolysates
  • Blood can be used to separate Haemoglobin or converted into Blood Meal
  • Horns and Hooves can be used for making buttons, fertilizers, fire extinguishers etc.
  • Teeth can be used to prepare Calcium fluoride phosphate.
  • Mutton tallow can be recovered for use in Soaps.
  • Glands can be used in pharma.​

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