Objective
Demonstrate energy saving sterilisation process in red meat rendering.
Raw offal is broken down into pumping form and fed with 7 tph through two successive (pre)heaters. From the final heater (140 deg.C 3.5 barg) the material is fed into an insulated pipe where it resides for 20 minutes at 133 deg.C. At the end of this pipe, total length over 500 m, the sterilized material is fed into a cyclone at 1 bar. Vapours from the cyclone and other process stages are used to heat material in the first preheater. Steam consumption is reduced to 0,097 kg/kg material (54 % saving). Electric power consumption is also reduced by 34 % to 0,017 kWh/kg. The pressurized sterilization in a pipe is innovating.
Engineering phase encountered a budget overrun due to required additional input during design of (pre)heater.
Fabrication phase encountered a budget overrun. Considerable cost occured due to price increase for stainless steel in the world market, fabrication and testing of (pre)heater following TUV rules etc..
Fabrication caused a months time delay for some equipment.
Installation phase was more complicated than expected, resulting in a time delay of two months. Installation supervision required more time than planned due to late delivery of some equipment.
Testing phase : Equipment has been dry tested and performed mechanically well.
Innovation
To sterilize red meat offal, the offal has to be heated to 133 deg.C (3.5 bar) and remain at this temperature for 20 minutes. In the conventional process this is achieved by using a batch type operation. The innovative process is based on the pressurized continuous sterilization in a pipe of a specific length, through which the material is pumped. The use of discharge vapours from the process itself to preheat the raw material is the basis for the saving of energy. Use of discharge vapours is not possible in a batch type operation.
Context
The continuous sterilization process for red meat offal is a process which can be used throughout the whole rendering industry (rendering is the processing of slaughterhouse offals for recycle purposes). Economic prospects
The energy saving with the continuous process exceeds 50 % compared to the batch process. This is achieved by using waste heat from the process to preheat the raw material and by simplifying transport of material through the plant which reduces electric power consumption.
The surcharge for the demonstration project compared to a conventional plant amount to ECU 471,000 -, however, irrelevant for comparison of pay back times.
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Programme(s)
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Coordinator
5831 Boxmeer
Netherlands
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.