FARMING AND INDUSTRIAL
Abattoir wastewater is a mixture of
The ever-changing mix of the above wastewater sources causes a large variation of the main pollutant, namely organic matter. The contributors of organic load to these effluents are paunch, faeces, fat, oil, grease, undigested food, blood, suspended material, urine, condemned meat, soluble proteins, manure, grit and colloidal particles.
Abattoir wastewater is characterised as high strength (high COD), high volume wastewater with relatively low suspended solids. For example a medium size poultry abattoir will process 20,000 chickens per day using roughly 17 litres of water per bird. After screening, the daily discharge is 340,000 litres of pink fatty water.
The most widely used route for disposal of abattoir waste is municipal sewers. Discharge costs due to the high organic strength of untreated abattoir waste is relatively high. Abattoirs traditionally have difficulty in meeting municipal by-laws for discharge of fats, oils, greases and suspended solids.
SYSTEM ADVANTAGES ARE;
Selectra’s sustainable architecture for treating abattoir waste streams is centred on producing energy, discharge standard effluent, and water for re-use. Treatment costs are recouped through the reduction in municipal surcharges associated by not discharging high COD wastewater into the municipal system, reduction in energy costs, sales of tallow, and water reuse. Energy costs are reduced by production of high quality biogas, a natural by-product of the H2E anaerobic wastewater treatment system. The biogas fuels a CHP generator thereby supplying the facility with electricity and hot water.
Selectra’s sustainable abattoir architecture successfully addresses the main obstacles that has limited technology uptake in the past, by effectively concentrating the organic solids in a smaller waste stream to reduce plant size and subsequent treatment of the wastewater to allow for reuse in the plant.
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