抄録
Natural salt production has rapidly been increasing in Okinawa after 1997. In this paper, we report some production methods of natural salt, which have been employed in Okinawa, and propose a high performance concentrator of sea water from 3.5% to 25% and two low-cost salt-production systems, i. e. a spray drying system and a double dram drying system. The concentrator can reduce energy consumption by 85%. The two systems can drastically reduce labor costs.
