Research Interests of
the Hozalski Laboratory
Contact
Information:
Raymond M. Hozalski, Ph.D., P.E., Associate Professor
University of Minnesota
Department of Civil Engineering
500 Pillsbury Dr. SE
Minneapolis, MN 55455-0116, USA
Phone: (612) 626-9650
Fax: (612) 626-7750
Email: hozal001@umn.edu
Overview
One of the main focus areas of the Hozalski research group concerns water quality in drinking water distribution systems. We have
been investigating both the biological and abiotic degradation of disinfection byproducts (DBPs).
Recently completed projects, supported by both the National Science Foundation and the American Water Works Association
Research Foundation concern the abiotic degradation of DBPs in the
presence of iron metal (Fe0), iron minerals, and iron
corrosion products extracted from water distribution systems. New projects, supported by the American Water Works Association Research Foundation, concern the biodegradation of haloacetic acids (HAAs) and an investigation of stannous chloride for lead corrosion control.
The Hozalski group continues to have a strong focus on biological processes for the treatment of water, wastewater, and hazardous waste. We are especially interested in biological processes involving bacteria immobilized on a solid surface in what are called biofilms. The main goals of our biofilms research program are to enhance understanding of the structure and function of biofilms, to develop or improve treatment processes that utilize biofilms, and to develop strategies for controlling biofilm growth on surfaces when biofilms are not desired. Current biofilms-related research projects include the aforementioned biodegradation of HAAs project and a project concerning microbial fuel cells for wastewater treatment. Finally, we are interested in studying the composition and reactivity of aquatic natural organic matter (NOM) with emphasis on the impacts of NOM on drinking water quality and treatment.
Lists of current research
projects and previous research projects with links for more information are provided below. For detailed
information concerning publications, presentations, etc., please
consult my curriculum vitae (resume). Lists
of publications with links to the articles are also provided in the
project descriptions below.
1) Cohesive Strength and Detachment of Bacterial Biofilms
2) Design Verification and On-Line Monitoring of the Aeration System for Vadnais Lake
3) Fate and Impacts of Antibiotics in Slow Rate Biofiltration Systems
4) Biodegradation of Haloacetic Acids in Distribution Systems
5) Microbial Fuel Cells for Energy-Efficient Wastewater Treatment
6) In Situ Sensor Networks for Real Time Urban Water Quality Monitoring and Management
7) Investigation of the Mode of Action of Stannous Chloride for Lead Corrosion Control
8) Development of a Stormwater BMP Assessment Protocol
1) Abiotic Degradation of Disinfection Byproducts
2) Evaluation of Taste and Odor Removal Options for St. Paul Regional Water Services
4) Development of a Safe and Rapid Method for Analysis of Haloacetic Acids (HAAs) in Drinking Water
5) Biodegradation of Haloacetic Acids (HAAs)
6) Pilot-Scale Evaluation of Lead Corrosion Control Chemicals
7) Effect of NOM and Biofilm on Removal of Cryptosporidium parvum Oocysts in Drinking Water Filters
8) Micro-Mechanical Measurement of the Cohesive Strength of Biofilms
Feel free to email me with questions or comments about the research described in these pages by clicking on the following link.