In the first category, he is investigating factors that influence the survival and activity of microorganisms in polluted soil and groundwater from arid zones. A novel approach to the utilization of a mixed culture of halophenol-degrading microorganisms has been ap  plied to a contaminated soil. Similarly, the use of adhesive microorganisms is suggested to improve biodegradation of pollutants in a fractured aquifer. Currently, Dr. Ronen is trying to improve our understanding of microbial activity in situ using stable isotopes as well as metabolic fingerprints. In the area of treatment of industrial wastewater, he is interested in the interaction between the inorganicconstituents of wastewater, particularly nitrogen, and the microbial constituents, and the ability of microorganisms to degrade the targetN-containing organic pollutants.

 

His research is now concentrated on elucidating the mechanisms by which high levels of ammonia or nitrate influence the biodegradation of explosives. In the area of biodegradation of organic pollutants, he is investigating the biodegradation of brominated compounds. This research is focused on understanding the biochemistry, physiology and ecology of the  microorganisms involved, particularly anaerobic ones.

 

An additional aspect of water quality is the local reuse of treated wastewater. Dr. Ronen’s main interest in this subject is assessment of the potential for survival of pathogenic bacteria in wastewater. His main goal is to find efficient and cost-effective disinfection methods to protect human health.