| 摘要 |
PURPOSE: A preparation method of alkaline water by using a waste shell washed, dried, ground, heat-treated, or acid- or alkali-treated is provided which is more economic and sanitary than conventional method. CONSTITUTION: A process for preparing alkaline water which comprises: (a)a stage for grading a shell with a wire woven mesh sieve of 40 to 150-meshes after washing, drying and grinding; (b)a stage for pouring water into a column filled with the graded shell or settling it in water; (c)a stage for washing the ground shell with an organic solvent; (d)a stage for treating the ground shell with an inorganic acid such as 1-10 wt.% of hydrochloric acid, nitric acid, sulfuric acid, or phosphoric acid if necessary; (e)a stage for heating the dried shell at 600-1,000°C for 12-24 hrs. The alkaline water has high alkalinity and is produced economically and sanitarily.
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