METHOD FOR REMOVING CALCIUM IONS FROM HIGH CONCENTRATION ORGANIC WASTEWATER
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United States of America
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Jan 13, 2022
app pub date -
Nov 25, 2019
filing date -
Nov 25, 2019
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Abstract
A method for removing calcium ions from high concentration organic wastewater is provided. The method comprises the steps of: (1) introducing high concentration organic wastewater containing Ca2+, inorganic carbon and a seed crystal into a reactor with a molar ratio of Ca2+ to inorganic carbon of 1:(3.2-6.2); (2) adjusting the hydrogen ion activity α(H+) and ionic strength of the solution in the reactor; (3) sequentially stirring and precipitating in the reactor to convert Ca2+ in the high concentration organic wastewater into calcium carbonate which is then precipitated for calcium removal.
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