title: Coagulants and Flocculants: Theory & Practice
author: Yong H. Kim
description: Yong H. Kim is senior research engineer with USFilter's Stranco Products, Bradley, Illinois. His research interest includes the application of water-soluble polymers to solid-liquid separation, the surface phenomena of colloidal suspension, and water disinfection. He is a graduate of the Seoul National University (BSChE) in Korea and earned a Ph.D. in Chemical Engineering from Kansas State University in 1987. He currently holds five U.S. patents after his eight years professional career and has published more than 20 technical publications. He is a member of American Institute of Chemical Engineers, American Chemical Society, Water Environment Federation, and American Water Works Association.
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  Int. J. Environ. Res. Public Health 2020, 17, 1777; doi:10.3390/ijerph17051777 
  www.mdpi.com/journal/ijerph 
  Article 
  Analysis of Biomaterials as Green  
  Coagulants to Control Suspended Solids for  
  Surface Water Treatment 
  Rosa Devesa-Rey *, J.D. González-Aller and Santiago Urréjola 
  Defense University Center, Naval Academy, University of Vigo. Plaza de España 2,  
  36920 Marín-Pontevedra, Spain; dani.glezallerjoly@gmail.com (J.D.G.-A.); urrejola@cud.uvigo.es (S.U.) 
  * Correspondence: rosa.devesa.rey@cud.uvigo.es 
  Received: 31 January 2020; Accepted: 05 March 2020; Published: 9 March 2020 
  Abstract: This study explores the use of natural, ecological coagulant-flocculants to reduce 
  suspended particles in water. Three compounds were tested, namely: diatomaceous earth, calcium 
  lactate and lactic acid. For this purpose, experiments in jar tests were carried out and the best 
  compound was submitted to an optimization in order to evaluate the most significant parameters 
  affecting its 