In the endless pursuit of developing new products, Intel technology development cycle results in new semiconductor production process every two years. As the size of the circuit gets smaller, the manufacture process environment requires tighter controlled. The need of removal all impurities such as dust, organics, and residual filing in the fabrication process become critical to achieve high product yield. The wafers usually are cleaned with ultra pure water and chemicals. One of the chemicals that semiconductor industry utilizes is ammonia. Ammonia and ammonium in wastewater can be toxic to the ecosystems. Toxic levels depend on ammonia concentration and waste water pH. In order to meet public own wastewater facility policy, wastewater which is containing ammonia must be treated before discharge into sewer. The rapidly changing and constantly tightening government regulation regarding water contamination gives birth to a unique situation which demands an ethical, technological and ecological solution to the problem of waste treatment.
Upadhyay, Jubin; Lu, Minh; and Alzamil, Ziyad, "Team Project Report: Evaluation of Available Technology to Treat Ammonia Wastewater" (2011). Engineering and Technology Management Student Projects. 637.