Does anyone have any feedback on the transfer of fat along a significant distance, i.e. 300-400 m?
I've never seen a fat pumping operation over such a long distance, especially outdoors, but here are a few ideas:
- In terms of pre-treatment prior to pumping, in order to reduce fibrous material and fat accumulation, install a grinder like a Muffin Monster http://www.jwce.com/muni/muffin-monster-model-30000/
- In terms of pumping: a lobe or cavity pump
The bigger problem will be maintaining a temperature > 15 °C over the 300-400 meters in order to prevent the fat from solidifying and jamming up the pipe.
This factor alone could stall your operation, unless you can set up a feedback loop of warm methane towards the plant to preheat the fat in the holding tank using a gas boiler.
To do so, calculate the heat balance between the methane produced by the additional input of fat on the bioreactor and the calories burned to preheat the fat.