Tuesday 8:30 AM
[Presentation PDF]

Room: Sapphire

In the Eye of the Beholder: Performance of Nutrient Removal Technologies and Its Meaning for Technology-Based Effluent Standards in Illinois

The ongoing push to reduce concentrations of nutrients in Illinois' waters is widely expected to translate to effluent limits in the discharge permits of wastewater agencies regulated under the NPDES. Many of those agencies are members of Illinois Association of Wastewater Agencies (IAWA), a major stakeholder in the development of nutrient water quality standards and other nutrient regulations in Illinois. By retaining a consultant for a nutrient removal study, IAWA sought to establish what nutrient removal technologies are municipally applicable across Illinois and what effluent quality can these technologies be reasonably expected to deliver with sufficient reliability. The study has examined published sources on phosphorus and nitrogen removal technologies in terms of applicability to municipal wastewater treatment plant upgrades, capital and operating cost expectations, and effluent performance. The presentation will review the IAWA nutrient study, the results and conclusions, and their subsequent use in the regulatory process in Springfield up to WATERCON 2012.

Moderator:  Mark Halm


Pavel Hajda, Ph.D., P.E. - Symbiont

Dr. Hajda’s professional career in wastewater treatment engineering spans two decades and both sides of the Atlantic. From Europe, he brings the Bachelor’s in chemical engineering (from the Institute of Chemical Technology in Prague) and several years of consulting practice in modeling and preliminary design of municipal wastewater treatment plants with nutrient removal. This was the early 1990s, when much of Europe began to contend with the eutrophication of the coastal waters, including by regulating nutrients in urban wastewater effluents. Stateside, Pavel obtained his Master’s and Ph.D. in civil engineering at Marquette University in Milwaukee, registered as a P.E. in Wisconsin, and gained a decade’s worth of practical consulting experience in Illinois as a process engineer mostly focused on municipal wastewater treatment planning, permitting, design, and construction engineering. Increasingly, these Illinois projects began to include nutrient removal features, usually driven by third-party concerns with antidegradation and the interim effluent standard for phosphorus.