The pretreated seawater is forced through a dense, semipermeable membrane at extremely high pressure, which separates salt and minerals from fresh water.

• 但有一点值得强调，海水淡化水虽然具有洁净、高纯度和供给稳定等特点，但只能作为直接饮用水或经处理后作为锅炉补充水。