Abstract
Concentration of waste brine exhausted from flash evaporator was studied with a newly developed, concentration technique. The results were that concentration of NaCl in concentrated brine, its purity, electric power consumption and its cost, respectively, were 264(g/l), 96(%)(NaCl/ T. salts) and 238(KWH/t-NaCl). Installation cost was 3,380 million YEN and total concentrated brine cost including amortization was 2,760(YEN/t-NaCl) under the following design basis. Quantity of waste brine 100,000(m 2/D), production capacity 610,000(t-NaCl/Year), current density 7(A/dm*), electricity 5(YEN/KWH). Installation cost and Operating cost for recovery of salt have been substantially reduced, so electrodialytic concentration process appears more attractive than it has hither to been the case for the industrial use or manufacturing of table salt.
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