HUBER Solutions for Slaughterhouses and Meat Processing Industry
- Customized solutions from one source
- Longtime experience in industrial wastewater treatment
- Well-proven products
Besides large slaughterhouses and meat packing companies, smaller butcheries are also among our customers. In cooperation with our clients we successfully develop and implement customized solutions for their specific wastewater and waste problems.
Wastewater of this kind of industry contains high freights of fat, solids, BOD and COD. Heavy pollution surcharges must be paid for such freights. For this reason it is economical to reduce the freights on site to such an extent that the pre-treated wastewater can be discharged into municipal sewers without surcharges. In many cases it is even economical to treat the wastewater further, so that the effluent can be directly discharged into receiving waters.
Requirements depend on business size, wastewater flow and freight. While small businesses are only required to remove fat and solids, larger operations are usually obligated to also reduce their COD and BOD freights.
Of course, discharge standards and requirements must be met; but in many cases it is cost-effective to achieve more and minimize the wastewater and waste disposal costs. Precondition for any customized solution is thorough investigation of the specific conditions.
Small and middle-size slaughterhouses and butcheries
Requirement: Reduction of grease and solids
Concept: Screening followed by flotation without chemical treatment
Grease: 80 - 90 %
Solids: 85 - 90 %
BOD5/COD: 40 - 70 %
Big meat processing factories and slaughterhouses
Requirement: Reduction of grease, solids and BOD5/COD
Concept: Screening followed by flotation with chemical treatment
Grease: 90 - 98 %
Solids: 90 - 96 %
BOD5/COD: 80 - 90 %
Solids dewatering: DS: 20 - 35 %
Wastewater from livestock vehicle washing contains not only faecal matter, but also straw and saw dust. We remove such solids with our Screw Screen. The screenings are washed, in order to return faecal matter into the wastewater, and then dewatered and compacted to a solids concentration of at least 35 %DS; they can be incinerated as solid waste.
Where cattle are slaughtered, 35 to 50 kg of paunch waste is generated per animal; it has a water content of about 90 %. Our Coarse Solids Compactor reduces its volume by 50 – 60 % and increases its solids concentration to 20 – 40 %DS.
Wastewater from the butchery contains much blood and fat. We pre-treat this flow with our Wedge Wire Screen; the wedge wires usually have a spacing of 1 mm. After intermediate storage for flow and freight equalization, we treat the wastewater further in a HUBER Dissolved Air Flotation Plant (DAF). Depending on the specific requirements, the wastewater is first chemically conditioned (by precipitation, coagulation, flocculation and/or neutralization) within a tubular reactor. The DAF effluent can be discharged into the municipal sewer.
For further full-biological treatment we provide a HUBER Membrane Bio-Reactor. Its effluent can be directly discharged into receiving waters. The permeate effluent is of outstanding quality and virtually disinfected, also permitting its reuse as process water.
Waste activated sludge, consisting of biomass generated by biological treatment, is concentrated in our Disc Thickener and then blended with the already thickened flotate sludge from the DAF, mainly containing fat and coagulated blood. The blended sludge is then dewatered in our Screw Press. The dewatered sludge cake and the compacted screenings from the wedge wire screen are preferable supplied to a biogas plant in order to increase its gas production.