Indirect costs are not considered in this evaluation; only direct costs.
During the process demonstration, a .convenient accounting period was
chosen to compare the cost of various methods of waste brine handling.
During this period, 5,612 portable exchange softeners were regenerated.
This required 92,500 pounds of salt contained in about 59,000 gallons
of water, resulting in about 62,700 gallons of brine of 60°5 strength.
As a base for cost comparison, the usual practice of simple discharge
to the sewer was considered.