Ddp Specialty Electronic Materials US, LLC

Minjia Zhao

Cheng Yang

Hong Su

Hugh Zhu

A method for treating waste water containing ammonia comprising the steps of: i) passing the waste water as a feed solution through a first RO membrane () to produce a first permeate stream () and a first reject stream (), ii) adjusting the pH of the first reject stream () to &#x3e;9, iii) passing the first reject stream () through a second RO membrane () to produce a second permeate stream () containing ammonia and a second reject stream (), and iv) passing at least a portion of the second permeate stream () to a cooling tower () to evaporate at least a portion of the ammonia.

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Shanghai, China

Minjia Zhao