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Chemical and Biological Engineering

SD Mines Researchers Hope to Sanford Lab Extremophiles to Create Low-Cost Renewable and Biodegradable Polymers

Courtney Carlson, a senior majoring in Chemical Engineering at SD Mines (right) and researcher Navanietha Krishnaraj Rathinam, Ph.D., (left) work in the Chemical and Biological Engineering and Chemistry (CBEC) building at SD Mines. Carlson and Krishnaraj Rathinam are using benchtop reactors in the lab to perform CNAM-Bio research that seeks to optimize and scale-up the manufacturing of biopolymers from lignocellulosic biomass using extremophiles. The center is a scanning electron microscope image of the bacteria the research team are studying.

A team of researchers with the Composite and Nanocomposite Advanced Manufacturing – Biomaterials Center (CNAM), led by David Salem, Ph.D., at the South Dakota School of Mines & Technology are using microbes that were discovered deep underground in the Sanford Underground Research Facility (SURF) in an attempt to make low-cost plastics that are renewable and biodegradable.

“Most commercial polymers, or plastics are petroleum based which is a non-renewable resource,” says Salem. The team is working to find ways to mass manufacture low-cost plant based plastics and composites. “A problem with bio-based polymers is they are expensive, and one goal of this center is to use genetically engineered microbes to help reduce the cost of manufacturing these kinds of plastics,” says Salem. “Another goal is to engineer the properties of the biopolymers and biocomposites to serve a wide range of commercial applications.”

There is a huge potential for new green-based manufacturing jobs in the area if the center succeeds in developing mass manufacturing techniques for turning plants into low-cost bio-based polymers.

“The top ten petroleum based polymers make up about a $500-billion global market,” says Salem. “These biopolymers potentially can cover the whole range of properties of those.”

A group, led by Rajesh Sani, Ph.D., from SD Mines’ Department of Chemical & Biological Engineering, have isolated th...

Last Edited 6/20/2017 10:39:43 AM [Comments (0)]

Sani’s Study of Extremophiles Welcomes International Collaborators, Gains Recognition

Dr. Rajesh Sani and his students have been collecting samples from the deep biosphere of the Sanford Underground Research Facility nearly a mile below ground.

Dr. Rajesh Sani’s research on how microorganisms can survive in extreme environments could lead to the conversion of solid wastes into bioenergy and the development of efficient, cost-effective green technologies.

In recent months his ongoing efforts have welcomed international collaborators from India and have been highlighted in SCI’s international Chemistry & Industry (C&I) Magazine.

The School of Mines and Sani, of the Department of Chemical & Biological Engineering, are currently hosting researchers from India for a year-long collaborative study on extremophiles such as those found a mile below the earth’s surface at the Sanford Underground Research Facility (SURF). The Sanford Lab in nearby Lead is located in the former Homestake Gold Mine and has 370 miles of tunnels. Of those tunnels, just 12 miles are maintained to house world-class laboratories where international dark matter and neutrino experiments are being conducted.

Over the past decade Sani’s group has been looking for thermophiles that can naturally degrade and ferment cellulose and xylan, a polysaccharide found in plant cell walls.

The extremophiles isolated from SURF by Sani’s group will also be used as test subjects in a new NASA study.

Last Edited 11/3/2016 02:50:26 PM [Comments (0)]