Effect of Electronic Water Treatment System on Calcium Carbonate Scale Formation in Landfill Leachate Collection Piping
Publication: Journal of Environmental Engineering
Volume 145, Issue 9
Abstract
Clogging of leachate collection systems (LCSs) can cause potentially catastrophic failures in landfill operation. The primary cause of clogging is calcium carbonate precipitation, which forms inside the pipe around a nucleus of silt, sand, microbial colonies, or other particles. One approach that has been proposed to prevent clogging in LCS is electronic scale control (ESC) technology. To quantify the effectiveness of ESC to reduce clogging within a gravity LCS pipe network, a field-scale pipe network was constructed with side-by-side flow of composite leachate treated electronically on one side and untreated leachate on the other. Water quality parameters, saturation indices, and solids composition were compared for any differences between the treated and untreated leachate. With respect to water quality of leachate, no statistically significant differences were observed. Neither the Langelier Saturation Index (LSI) nor the Ryzner Index (RI) changed toward neutrality after treatment. X-ray diffraction/X-ray fluorescence (XRD/XRF) analysis of precipitates in the pipe network identified calcite () to be the predominant phase present, and there were no observed differences in composition between the treated and untreated precipitates.
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Acknowledgments
The research was sponsored in part by the William W. “Bill” Hinkley Center for Solid and Hazardous Waste Management, University of Florida, and Florida Atlantic University. The researchers would like to thank the following individuals for their contributions to the research: P. D. Scarlatos, Frederick Bloetscher, Tom Fitsell, John March, Steve Silvers, Mark Eyeington, Joshua Catron, Jeremy Dowler, Jason Millette, Tim Vinson, John Schert, Joseph Lakner, Neil Coffman, Julia Roblyer, Aaron Thornton, Samantha Godskind, Alyssa Harris, and Eve Walecki.
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Published In
Journal of Environmental Engineering
Volume 145 • Issue 9 • September 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Sep 20, 2018
Accepted: Jan 31, 2019
Published online: Jun 28, 2019
Published in print: Sep 1, 2019
Discussion open until: Nov 28, 2019
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