METHOD FOR NEUTRALIZING AKALIC WASTE WATER USING LIQUIFIED CARBONDIOXIDE AND METHOD FOR TREATING AKALIC WASTE WATER COMPRISING THE SAME

摘要

The present invention relates to a method of neutralizing alkalic wastewater. The method includes: a step (a) of gasifying liquefied carbonic acid gas (CO_2); a step (b) of decompressing the gasified carbonic acid gas; a step (c) of making the decompressed carbonic acid gas flow into a flowrate control valve; a step (d) of making alkalic wastewater and the carbonic acid gas flow into an alkalic wastewater neutralizing apparatus; and a step (e) of neutralizing the alkalic wastewater by stirring the carbonic acid gas with the alkalic wastewater in the alkalic wastewater neutralizing apparatus. According to the present invention, the method of neutralizing alkalic wastewater is capable of neutralizing alkalic wastewater with liquefied carbonic acid gas, thereby securing stability in treating alkalic wastewater as well as improving secondary environmental pollution occurring due to the use of a solid or liquid neutralizing agent, and minimizing installation space and reducing costs for maintenance.