Program
All Presentations (pdf)

Monday
8:15 Brent Means
10:10 James J. Gusek
12:40 Jonathan M. Dietz
2:15 Kimberly R. Weaver
4:00 Brent Means

Tuesday
8:45 Robert Kleinmann
9:15 Brent Means
9:30 James J. Gusek
10:00 Glenn C. Miller
10:30 Linda Ann Figueroa
12:40 Art Rose
1:10 Charles A. Cravotta III
1:40 Danielle M C Huminicki
2:50 Bernard Aube
3:20 Timothy K. Tsukamoto
3:50 Bradley R. Shultz
4:20 Kimberly R. Weaver

Wednesday
8:00 Linda Ann Figueroa
8:30 John Senko
9:00 Song Jin
10:10 Jonathan M. Dietz
10:40 Daryle H. Fish
12:40 John Chermak
1:10 Griff Wyatt
1:40 Dan Mueller
2:50 Sean C. Muller
3:20 Jack Adams
3:50 Roger Bason
3:50 Mark B. Carew

Thursday
8:00 Rep. John E. Peterson
8:30 Scott Sibley
9:00 Charles A. Cravotta III
9:30 Michael R. Silsbee
10:30 Lykourgos Iordanidis
11:00 Mark Conedera
11:30 Barry Scheetz
1:25 William Benusa
1:55 Mike Sawayda
2:25 Susan J. Tewalt
3:25 Robert S. Hedin
3:55 Chad J. Penn
4:25 Ron Neufeld

Long-Term Performance of Vertical Flow Ponds

Author(s)

Arthur W. Rose, Ph.D.
Professor Emeritus of Geochemistry
Penn State University
409 Deike Building
University Park, PA 16802
814.865.7261
rose@ems.psu.edu

Abstract

Increasingly, it is recognized that many vertical flow ponds (SAPS) are not performing up to expectations over the long term. This paper extends the data on performance and problems previously presented, with the addition of new sites and updated information.

Of 39 sites, about half are performing satisfactorily. Four sites have essentially ceased to treat. Most of the remainder are treating at a moderate level, but not up to original expectations. Problems are overflow because of plugging by Fe precipitate on top of compost or by Al precipitate in limestone, leakage, decreased treatment because of short circuiting or Al coating, or inadequate size for the acidity loading. Several systems have been rebuilt at low cost and are performing satisfactorily. Areal loading of Fe and Al is an additional design parameter that should be considered.

Presentation

Biography