The Michigan Engineer News Center

Professor Daigger contributes to National Academy report on stormwater and graywater

In the face of drought and major water shortages, the U.S. is increasingly turning to alternative water sources like stormwater and graywater, according to a recent report from the National Academies of Sciences, Engineering and Medicine.| Short Read

Graywater and stormwater could significantly supplement traditional potable water supplies using existing technology to capture and treat the waters, but there is limited information on the costs, benefits, risks, and regulation of such projects, the report concludes.  Additional research and changes in infrastructure will be necessary to take full advantage of the potential of graywater and stormwater.

Professor Glen Daigger contributed to the report as a member of the National Academies Committee on the On-Site Reuse of Graywater and Stormwater: An Assessment of Risks, Costs, and Benefits.

The findings and recommendations of this report will be valuable for water managers, citizens of states under a current drought, and local and state health and environmental agencies.

To learn more about the report, please visit

The electrons absorb laser light and set up “momentum combs” (the hills) spanning the energy valleys within the material (the red line). When the electrons have an energy allowed by the quantum mechanical structure of the material—and also touch the edge of the valley—they emit light. This is why some teeth of the combs are bright and some are dark. By measuring the emitted light and precisely locating its source, the research mapped out the energy valleys in a 2D crystal of tungsten diselenide. Credit: Markus Borsch, Quantum Science Theory Lab, University of Michigan.

Mapping quantum structures with light to unlock their capabilities

Rather than installing new “2D” semiconductors in devices to see what they can do, this new method puts them through their paces with lasers and light detectors. | Medium Read