Raymond Hozalski is interested primarily in the application of biological processes for the treatment of water, wastewater, and hazardous waste. One of his main areas of specialization within biological processes is biofilms, which are microbial communities immobilized on solid surfaces. The Hozalski lab’s biofilms research program aims to enhance understanding of the structure and function of biofilms in engineered (e.g., pipelines) and natural systems, to develop or improve water treatment processes that employ biofilms, and to develop strategies for controlling accumulation of biofilms on surfaces through the measurement and manipulation of biofilm mechanical properties. Raymond is also interested in studying the composition and reactivity of aquatic natural organic matter (NOM) with emphasis on the impacts of NOM on water treatment and drinking water quality.