Since this process is not a great user of energy (utilities and sludge
transport), the subject of direct energy usage can be disposed of
quickly. Direct eneegy use is minimal, being in the order of $25-30
per month. However, the energy used to manufacture lime and soda ash
is of -.a much higher order than the energy used to manufacture
comparable quantities of sodium chloride. Comparison of energy usage
is beyond the scope of this report but comparisons should be made
during the planning of all long-range ecological projects.