The Properties of Combined Horizontal Flows of Air and Farm Livestock Slurries in a Tubular Loop Aerator

Pig slurries containing up to 3·5% TS showed no reductions in pressure loss due to air injection, whereas cattle slurries of 2-3% TS produced some instances of pressure reduction. These reductions occurred at low superficial liquid flow velocity (0·5 m/s) and <2% (vol/vol) air injected, but the results did not provide statistically significant evidence of an energy-saving effect.