Thermophilic process for protein recovery as an alternative to slaughterhouse wastewater treatment

  • Gariépy S
  • Tyagi R
  • Couillard D
 et al. 
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Thermophilic aerobic treatment of slaughterhouse waste was carried out in a laboratory bioreactor at different temperatures and solids retention times without cell recycle. COD was reduced by over 93%. Phosphorus was removed from 72 to 90% under different cultivation conditions. A high rate of specific substrate consumption was observed compared to that obtained in mesophilic processes. The biokinetic constants were evaluated. Crude protein content of the biomass varied from 64 to 78%. The composition of the essential amino acids in the biomass was similar to that of meat and soya meals and appeared well-balanced and appropriate for pigs and poultry feeding. © 1989.

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