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Rethinking Wastewater

By Marguerite Huber

glass of beer

The next time you enjoy a beer you might be helping the environment.

The next time you enjoy a cold, refreshing beer or glass of wine, you might also be helping the environment. Over 40 billion gallons of wastewater are produced every day in the United States, and wineries, breweries, and other food and beverage producers are significant contributors.  For example, the brewing industry averages five or six barrels of water to produce just one barrel of beer.

But where most see only waste, others see potential resources. What we label “wastewater” can contain a wealth of compounds and microbes, some of which can be harvested.

One innovative company that has recognized this, Cambrian Innovation, is harnessing wastewater’s potential through the world’s first bioelectrically-enhanced, wastewater-to-energy systems, EcoVolt. (We first blogged about them in 2012.)

Cambrian Innovation is working with Bear Republic Brewing Company, one of the largest craft breweries in the United States. Located in California, which is suffering from severe drought, Bear Republic first began testing Cambrian’s technology to save water and reduce energy costs. Fifty percent of the brewery’s electricity and more than twenty percent of its heat needs could be generated with EcoVolt. Compared to industry averages, Bear Republic uses only three and a half barrels of water to produce one barrel of beer.

The EcoVolt bioelectric wastewater treatment system leverages a process called “electromethanogenesis,” in which electrically-active organisms convert carbon dioxide and electricity into methane, a gas used to power generators.  The methane is renewable and can provide an energy source to the facility.

Rather than being energy intensive and expensive, like traditional wastewater treatment, Cambrian’s technology generates electricity as well as cost savings.

Furthermore, the EcoVolt technology is capable of automated, remote operation, which can further decrease operating costs.

EPA first awarded Cambrian Innovation a Phase I (“proof of concept”) Small Business Innovation Research contract in 2010. Based on that work, the company then earned a Phase II contract in 2012 to develop wastewater-to-energy technology. Cambrian Innovation has also developed innovative solutions with funding from other partners, including the National Science Foundation, National Aeronautics and Space Administration, Department of Defense, and U.S. Department of Agriculture.

With access to water sources becoming more of a challenge in many areas of the country, Cambrian’s technology can help change how we look at wastewater. It doesn’t have to be waste! Wastewater can instead be an asset, but only as long as we keep pushing its potential. That can make enjoying a cold glass of your favorite beverage even easier to enjoy!

About the Author: Marguerite Huber is a Student Contractor with EPA’s Science Communications Team.

Editor's Note: The opinions expressed here are those of the author. They do not reflect EPA policy, endorsement, or action.

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Research Partnership Advancing the Science of Organic Aerosols

By Sherri Hunt

Air monitoring research site with sensors and towers

Air monitoring research site with sensors and towers

Why is there so much interest in weather forecasts, maps, smoke, planes, balloons, towers, filters, instruments, cities, and trees in Alabama this summer? At this very moment, more than 100 scientists are making measurements at multiple locations in the Southeastern U.S. to investigate a number of challenging research questions related to organic aerosols—small particles suspended in the atmosphere. These particles contribute to concentrations of particulate matter (PM), which can influence both climate and people’s health.

The Southeastern U.S. is an ideal location to study the formation and physical properties of organic aerosol since it is hot, sunny, forested, and impacted by pollution from cities. In a coordinated research effort, scientists have converged at the primary surface site in Brent, AL. They are working there throughout June and July 2013 as part of the Southern Oxidant and Aerosol Study (SOAS) and other related field campaigns, all coordinated under the Southern Atmosphere Study (SAS). Additional measurements are being made on the ground at sites in Research Triangle Park, NC, the Duke Forest, NC, and Look Rock, TN.

By using research towers, balloons, and several aircraft flying above the ground sites, scientists are taking measurements at multiple heights, making this the most detailed characterization of the southeastern atmosphere since the 1990s.

The planning for this campaign began more than two years ago as the scientific community identified the need for a rich data set in order to address pressing research questions related to how organic aerosol is formed and its impact on regional climate.  Improving the understanding of these physical and chemical properties will enable the development of more accurate models of air pollution and climate, which in turn will make more effective plans to improve air quality possible. Such scientific discoveries may enable us to better understand the atmosphere across the country and ultimately determine ways to enable more people to breathe cleaner air. They will also allow scientists to understand, anticipate, and prepare for potential future climate changes.

In order to accomplish a study of this magnitude, EPA is working together with the National Science Foundation, the National Oceanic and Atmospheric Administration, and others.

EPA is also funding 13 research institutions to participate through the Agency’s Science to Achieve Results (STAR) grant program. The STAR funded researchers will leverage the measurements and equipment provided by the other partners and conduct analyses of the rich data sets collected. Funded projects include work investigating each part of the organic aerosol system, from measuring emissions and formation products, to cloud-aerosol interactions, to climate impacts of aerosols.

In addition to field measurements, laboratory experiments and modeling studies are also planned that include EPA researchers. As part of EPA’s involvement, Agency scientists are using a novel tracer method that will allow them to differentiate between man-made and natural sources of organic aerosols. The data and results will help improve our understanding of organic aerosol formation and will also be shared with other researchers.

Public open houses at the Alabama and Tennessee sites on June 19 and 21, 2013 will allow the surrounding communities an opportunity to see the state-of-the-art measurement instruments and meet researchers. Interested?  If you are in the area, please consider coming by to see what all the interest is about.

About the Author

EPA researcher Dr. Sherri Hunt

EPA researcher Dr. Sherri Hunt

Sherri Hunt, Ph.D. is the Assistant Center Director for EPA’s Air, Climate, and Energy research program. Read more about Sherri and her work on her “EPA Science Matters” interview: Meet EPA Scientist Sherri Hunt, Ph.D.

 

Editor's Note: The opinions expressed here are those of the author. They do not reflect EPA policy, endorsement, or action.

Please share this post. However, please don't change the title or the content. If you do make changes, don't attribute the edited title or content to EPA or the author.