Research

D. Raj Raman, Ph.D., P.E.
Associate Professor

E-mail: draman@utk.edu

Research Interests:

We live in an age of expanding global population and increasingly concentrated food production systems. To reduce the potential for serious environmental disruptions, efficient, reliable, and low-cost methods for treating agricultural and food-processing wastes are needed. My research has focused primarily on two types of  waste bioprocessing systems: high-rate anaerobic digesters (such as fixed-film digesters, and upflow anaerobic sludge blanket reactors), and constructed wetlands, both of which are part of the solution to the problems outlined above. In addition to an interest in the biology and dynamics of these systems, I am interested in methods of assessing the cost of various treatment technologies, to better understand limitations to the deployment of these technologies in agricultural settings.

A new research thrust of mine is the development of sensing systems to remotely locate insect infestations in cropping systems. Such systems could be used to enhance IPM (integrated pest management) practices by increasing the spatial and temporal resolution of insect census data. Collaborators on this work include Reid Gerhardt, John Wilkerson, Cyrus Smith, and Jerome Hogsette.

Ongoing Research Projects:

Quantifying and minimizing 17-beta-estradiol emissions from dairy and swine operations. Co-PI's: Layton, A. C., Mullen, M. D., Burns, R. T., and G. S. Sayler. Funded by USDA NRI program, $215,500 over two years.
High-rate anaerobic pretreatment of animal wastewater: Impact on traditional anaerobic animal waste treatment system performance and economics. Co-PI: Burns, R. T. Funded by USGS through TNWRRC, $38,680 over 18 months).
Development of mosquito control strategies for free-water surface constructed wetlands treating dairy wastewater. Primary collaborators: Gerhardt, R., Burns, R. T. Funded through Hatch Project TN 146.
Development of a fuzzy logic system to refine the output of a Failure Causing Load Detector for upflow anaerobic sludge blanket reactors. Funded through Hatch Project TN 146.

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