Hydrogen gas production system utilizing silicon wastewater and method for production of hydrogen energy using the same

Abstract

Disclosed is a method for production of hydrogen energy utilizing silicon wastewater. The method includes treating the silicon wastewater through UF membrane filtration to separate UF treated water and a concentrated silicon waste solution therefrom, admixing the separated silicon waste solution with an alkaline material, reacting the concentrated silicon waste solution with the alkaline material in the mixture to produce hydrogen gas and alkaline water, using an acidic material to neutralize the alkaline water, thereby forming a supernatant and a precipitate.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a divisional application of U.S. application Ser. No. 13 / 012,297, filed on Jan. 24, 2011, which claims a priority to and the benefit of Korean Patent Application No. 10-2010-0014324, filed on Feb. 17, 2010, the disclosures of which are incorporated herein in its entirety by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a system for production of hydrogen energy utilizing silicon wastewater in order to create an additional energy resource, and a method for production of hydrogen energy using the same.[0004]2. Description of the Related Art[0005]As advanced information and communication industries, semiconductor industries, exhaustion of petroleum energy, as well as industries using solar energy to prevent global warming recently come to the fore, demand for silicon wafers is rapidly increasing.[0006]In general, a silicon wafer is fabricated by providing a slur...

AI Technical Summary

Benefits of technology

The present invention is a system and method for producing hydrogen energy using silicon wastewater. The system includes a method to solidify residual waste in the water, reducing waste mass and disposal costs. The treated water can also be reused in the system, improving recovery. These technical effects help to decrease waste and increase efficiency in the production of hydrogen energy.

Problems solved by technology

However, the concentrated wastewater remaining after primary treatment of the silicon wastewater is excessively concentrated and causes abnormal conditions such as clogging of UF membranes to be used for any further process, for example, UF membrane filtration.

As a result, the conventional method entails a problem in that recovery of the production water from the silicon wastewater is not enhanced to a desired level.

Further, since the concentrated wastewater generated from the silicon wastewater is discarded without treatment, there may incur a high relatively disposal cost amounting to from 60,000 to 80,000 won per ton.

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