The authors of this paper enhanced the previously reported model for planning the transportation and application of digested slurry to farmlands as a fertilizer. The following 2 functions were added to the model to modify for larger quantity of digested slurry.
(1)Operation with plural vacuum trucks of digested slurry.
(2)Installation of intermediate tanks into the transportation and application system.
These functions were examined by simulation with hypothetical conditions. According to the simulation results, the number of vacuum trucks with the shortest waiting time minimized labor and fuel. The installation of an intermediate tank also reduced the labor and fuel in longer distance of transportation.
The simulation results indicate that the added functions are useful for planning more effective transportation and application of digested slurry to farmlands.
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