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Micronized caco3 slurry injection system for desalinated water and remineralization of fresh water

A remineralization and water slurry technology, applied in water/sewage treatment, control/manipulation system, water/sludge/sewage treatment, etc., can solve the problem of slow dissolution rate of granular calcium carbonate

Active Publication Date: 2016-06-08
OMYA INT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, granular calcium carbonate has a slow dissolution rate and requires large filters for the limestone filtration method
This results in a rather large footprint for these filters and requires large equipment surfaces for these limestone bed filtration systems

Method used

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  • Micronized caco3 slurry injection system for desalinated water and remineralization of fresh water
  • Micronized caco3 slurry injection system for desalinated water and remineralization of fresh water
  • Micronized caco3 slurry injection system for desalinated water and remineralization of fresh water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0089] Measurement methods:

[0090] CO 2 Measurement

[0091] Titration was used to determine the concentration of carbon dioxide contained in the feed water sample used. The rationale for this method lies in the fact that CO 2 Reacts with sodium carbonate or sodium hydroxide to form sodium bicarbonate (NaHCO 3 ). Completion of the reaction is indicated either potentiometrically or by the development of a pink characteristic color of the phenolphthalein indicator at an equivalent pH of 8.3.

[0092] Feed water titrations were performed at 25°C using a Mettler Toledo M416.

[0093] A three-point calibration of the instrument (according to the line segment method) was first performed using commercially available buffer solutions of pH 4.01, 7.00 and 9.21 (from Mettler Toledo).

[0094] The pH of a 100 ml sample of the feed water is then measured as a function of the amount of titrant used until an end point of pH 8 is reached. In this measurement, the titrant is 0....

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Abstract

The present invention relates to a method for treating water and the use of calcium carbonate in this method. In particular, the present invention relates to a method of remineralizing water comprising the steps of: a) providing feed water having a concentration of at least 20 mg / l, preferably in the range of 25 mg / l to 100 mg / l, and more preferably in the range of a carbon dioxide concentration in the range of 60 mg / l; b) providing an aqueous slurry comprising micronized calcium carbonate; and c) combining the feed water of step a) with the aqueous slurry of step b) to obtain remineralized water.

Description

technical field [0001] The present invention relates to the field of water treatment, and more particularly to a method for remineralization of water and the use of calcium carbonate in this method. Background technique [0002] Drinking water has become scarce. Even in water-rich countries, not all water sources and cisterns are suitable for producing drinking water, and many water sources are today threatened by a dramatic deterioration in water quality. The primary water supply for drinking purposes is mainly surface water and groundwater. However, for environmental and economical reasons, the treatment of seawater, salt water, brackish water, waste water and contaminated effluent is becoming more and more important. [0003] In order to recover water (for drinking) from seawater or brackish water, several methods are known which are important for arid regions, coastal areas and islands, and these methods include distillation, electrolysis and osmosis or reverse osmosis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/68
CPCC02F1/68C02F1/001C02F1/008C02F1/444C02F2001/007C02F2103/001C02F2103/02C02F2103/08C02F2209/003C02F2209/05C02F2209/055C02F2209/06C02F2209/07C02F2209/10C02F2209/11C02F2209/24C02F2301/043Y02A20/131C01B5/00
Inventor M·斯科比M·普菲特
Owner OMYA INT AG