JoAnn Silverstein

Research Interests: biological water/wastewater treatment processes, including nitrogen transformation in activated sludge and biofilm, bioremediation of acid mine drainage, bioreactors for recycling wastewater space, biodegradation of solid waste.


Engineering Experience


National Committee Memberships

Selected Research Papers

1.       Peccia, J., E. Marchand, J. Silverstein, M. Hernandez, “Development and Application of Small-Subunit rRNA Probes for Assessment of Selected Thiobacillus Species and Members of the Genus Acidiphilium. Appl. Environ. Microbiol., 66(7):3065-3072, 2000.

2.      Marchand, E. and J. Silverstein, “Remediation of Acid Rock Drainage by Inducing Biological Iron Reduction.” Proc. 5th Intl. Conf. Acid Rock Drainage, Soc. Mining, Metal. & Explor., 1201-1207, 2000.

3.      Oh, J. and J. Silverstein, "Effect of air on-off cycles on activated sludge denitrification." Wat. Environ. Res., 71(7):1276-1282, 1999.

4.      Oh, J. and J. Silverstein, "Substrate Limitation and Nitrate Accumulation During Denitrification," J. Environ. Eng. (ASCE), 123(3):234-242, 1999.

5.      Oh, J. and J. Silverstein, "Oxygen inhibition of activated sludge denitrification," Wat. Res. 33(8):1925-1937, 1999.

6.      Brion, G. and J. Silverstein, "Iodine Disinfection of a Model Bacteriophage, MS2, Demonstrating Apparent Rebound," Wat. Res., 33(1):169-179, 1999.

7.      Glass, C. and J. Silverstein, "Denitrification of High-Nitrate, High-Salinity Wastewater," Wat. Res., 33(1):223-229, 1999.

8.      Glass, C. and J. Silverstein, "Denitrification Kinetics of High Nitrate Concentration Water: pH Effect on Inhibition and Nitrite Accumulation," Wat. Res., 32:831-839, 1998.

9.      Glass, C., J. Silverstein, and J. Oh, "Inhibition of denitrification by activated sludge by nitrite," Wat. Environ. Res., 69:1086-1093, 1997.

10.   Carlson, G. and J. Silverstein, "Effect of Molecular Size and Charge on Biofilm   Sorption of Organic Matter," Wat. Res., 32:1580-1592, 1998.

11.  Carlson, G. and J. Silverstein, “Effect of Ozonation on Sorption of Natural Organic Matter by Biofilm,” Wat. Res., 31:2467-2478, 1997.

12.  Jo, K-H. and J. Silverstein, "Substrate inhibition of degradation of 2,4-dinitrophenol in activated sludge," Wat. Environ. Res., 70:94-100, 1998.

13.   Marchin, G.L., J. Silverstein and G.M. Brion, "Effect of Microgravity on Escherichia coli and MS-2 Bacteriophage Disinfection by Iodinated Resins," Acta Astronautica, 40(1):65-68, 1997.

14.   Silverstein, J. “Biological Denitrification of Drinking Water in Rural Communities.” Project #WO-2662-84 Report to EPRI, May 1999.

15.   Page, A. et al., (including J. Silverstein), Use of Reclaimed Water and Sludge in Food Crop Production, National Research Council, National Academy Press, Washington, DC, 1996.

16.  Silverstein, J., G. Brion, R. Barkley, A. Dunham, C. Hurst, P. Todd, J. Shulz, "Contaminant Accumulation in Space Recycle Systems." Acta Astronautica, 33:317-338, 1994.

17.  Barkley, R. Hurst, C., Dunham, A., Silverstein, J. and Brion, G. "Generation of Iodine disinfection By-Products in a Water Recycle System." Trans. Soc. Auto. Engineers, 101:1317-1321, 1992.

18.   deMendonca, M., J. Silverstein, and N.E. Cook, Jr. “Short and Long-Term Responses to Changes in Hydraulic Loading in a Fixed Denitrifying Biofilm.” Wat. Sci. Tech., 26:535-544, 1992.

19.  Figueroa, L.A. and J. Silverstein, “The effect of particulate organic matter on biofilm nitrification.” Wat. Environ. Res., 64(5):728-733, 1992.

20.  Klees, R. and J. Silverstein, "Recycled Compost Study," Wat. Res. Eng., 87:36, 1987.

21.  Barrett, J.M. and J. Silverstein, "The Effects of High-Carbon and High-Coliform Feed Waters on the Performance of Slow Sand Filters under Tropical Conditions," in Slow Sand Filtration, ed. N. Graham, Wiley & Sons, New York, NY, 1988.


Silverstein, J. (inventor), Univ. Colorado (owner), “Biological Denitrification of Water,” U.S. (#5,681,471, Oct. 28, 1997) and international (European Patent Office, no. 97903788.4-2104, 10/8/98), currently licensed by Univ. Colorado to Nitrate Removal Technologies, LLC.

Graduate Student Supervision

Current Courses