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“Discussion of Arnaldos, M., Pagilla, K., 2010. Effluent Dissolved Organic Nitrogen and Dissolved Phosphorus Removal by Enhanced Coagulation and Microfiltration. Water Research 44, 5306-5315.”
Author: John Bratby and Denny S. Parker
Date: 10/11
Water Research, Vol. 45, 2011, pp. 5343-5345.

The paper is an important contribution and provides valuable information on the methods developed at the Illinois Institute of Technology for measuring low DON and organic phosphorus residuals. However, there are two important issues that the writers consider important to discuss below: The first relates to the importance of final pH after coagulant addition. The second relates to the extraordinarily favorable results presented in the paper, compared to other workers.

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