Abstract: Abstract:The structure and the specification of the upflow limestone contact chamber were introduced. The design conditions of the upflow limestone contact chamber were analyzed. The superficial velocity and the empty bed contact time were calculated. The quality of the mineralized water, the performance of the limestone contact chamber under low flow and the quality of the limestone were expounded. The Langelier Saturation Index of the desalinated seawater after mineralization treatment using upflow limestone contact chamber is near to zero, so the water is more suitable for people drink.

Key words: Keywords:upflow limestone contact chamber, design conditions, superficial velocity, empty bed contact time, water quality after mineralization treatment