Lg Chem, Ltd

Nam Young Yoon

Jung Su Han

Jun Seok Ko

Suk Yung Oh

Yong Heon Cho

Provided is a wastewater purification method, the method including: supplying a first mixed stream, in which an acid component and wastewater including water, a nitrile-based monomer, and ammonia are mixed, to a first column; recovering the nitrile-based monomer from an upper discharge stream from the first column; supplying a second mixed stream, in which a lower discharge stream from the first column and a base component are mixed, to a second column; and recovering the ammonia from an upper discharge stream from the second column and separating purified wastewater.

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Daejeon, South Korea

Nam Young Yoon