By Tina Casey •
November 7, 2009
Veteran solar installer Parkson Corporation is lending its expertise to a new wastewater treatment plant upgrade for the town of Berlin near the Maryland coast. When it’s finished, the new plant will almost eliminate the use of fossil fuels for drying and converting biosolids, also known as sludge, into a lightweight Class A soil amendment or sustainable fuel. The process is pushed along by a stainless steel “Electric Mole” that automaticaly mixes, aerates, and granulates the sludge as it dries.
The $16 million upgrade project is funded by ARRA (American Recovery and Reinvestment Act). Parkson’s Thermo-System Active Solar Sludge Drying Chambers will enable the sludge conversion process to operate under more than 90% solar power rather than using gas or oil. For disposing sludge in landfills, that translates into a significant savings in preparation and transportation costs. Even better, it makes sludge products more cost-competitive with conventional soil amendments and fossil fuels, effectively taking the “waste” out of wastewater.
By Tina Casey •
November 6, 2009
The U.S. Department of the Interior reports that overall water consumption in the United States has declined in the past 25 years, even though the population has increased 30% and use by individual American households has increased. The statistics were compiled by the U.S. Geological Survey.
What’s the secret? The 25-year patterns of water consumption revealed in the DOI report provide tantalizing clues about the ability of the U.S. to sustain its legendarily consumer-centric lifestyle while stabilizing and ultimately decreasing its contribution to carbon emissions and other greenhouse gasses.
By Tina Casey •
November 4, 2009
Bokashi is a centuries-old Japanese method of recycling household food waste into all-natural compost. By employing a special culture of yeast and other microorganisms, bokashi is a compact, odorless process that takes only days instead of weeks or months. Now the Bokashicycle company is breaking the process out of the kitchen and into a commercial-scale food waste recycling operation, in partnership with New Earth Farm in Hillsboro, Oregon.
New Earth Farm takes in food scraps from Bon Appetit cafeterias on the nearby Intel Hawthorn Farm campus, which provides a significant waste disposal savings compared to disposing the scraps in landfills. Waste reduction is one goal, and in an even more sustainable twist the composted soil is used to grow crops for Abundant Harvest, a local consumer-supported agriculture (CSA) store.
By Tina Casey •
November 3, 2009
Researchers at Rice University have announced the discovery of a new breakthrough method for producing carbon nanotubes in bulk fluids. Rice’s new nanotube “stew” could spur the inexpensive mass production of carbon nanotube-based products, much like the plastics industry employed bulk loads of melted polymers as a cheap base for making everything from medical equipment to polyester shirts to plastic bags, and countless other things in between.
Rice’s nanotube research was sponsored in party by U.S. Air Force and U.S. Navy. Aside from their military application, carbon nanotubes have a practically unlimited potential for sustainable civilian products because of their strength, light weight, and electrical conductivity among other properties. Lightweight nanomaterials could boost the gas mileage in cars and airplanes, make thinner and more flexible solar cells, increase the efficiency of lithium-ion batteries (in combination with another new high tech material, graphene), and be used in artificial photosynthesis to generate hydrogen fuel.
By Tina Casey •
November 2, 2009
Catch the Wind Ltd. of Virginia has just announced that its new Vindicator laser wind sensor has been deployed on a specialized buoy for a field test off Race Rocks Island in British Columbia. If successful, the laser sensor would be part of the world’s first buoy-based wind power assessment system, which could shave millions off the cost of assessing conditions at potential sites for offshore wind turbines.
Conventional site assessments for large scale wind farms are done through the construction of a permanent offshore tower, which can cost up to $10 million. Catch the Wind’s movable buoy-based system, called the WindSentinel, could virtually eliminate that expense and help open up sustainable offshore wind power to small communities, military bases, and other modestly scaled projects.
By Nick Chambers •
October 30, 2009
Touring bands are notorious for their environmental footprints, but more and more the bands and their fans are taking steps to make the activity less damaging.
When it comes to music, the Beatles—fueled by my parents’ large collection of vinyl—dominated most of my early life. The White Album is like my musical comfort food; it’s what I go back to when I need to feel rooted. But in terms of the music that has influenced and shaped much of my adult life, there is no band more important than Phish.
By Tina Casey •
October 27, 2009
San Diego Gas & Electric has embarked on a demonstration project to test the commercial viability of a new concentrated solar power system that uses shallow pools of water as a passive cooling system for high-efficiency solar cells. The unique proprietary technology was developed by Pyron Solar of Sorrento Valley, California.
The new technology could be attractive in land-rich areas, and it may also have some application for introducing sustainable energy to more densely developed areas, since its use of high efficiency solar cells enables it to pack more generating capacity into less space. It also may prompt some new exploration of the opportunity to double up solar energy generation with other operations, such as fish farming.
By Tina Casey •
October 25, 2009
Sharp Corporation has just announced that it has achieved the world’s highest solar cell conversion efficiency using a compound layered design based on the technology used in the solar cells that power space satellites. Mindful of the link between sustainable energy and the future market for consumer electronics, Sharp has been aggressively pursuing solar efficiency improvements that lend themselves to commercial application.
Instead of silicon, compound solar cells use two or more photo-absorption layers composed of different elements. The trick is to find materials that generate the most current with the least waste. Sharp’s innovation is a proprietary technology that enables it to produce a high-efficiency crystalline compound, InGaAs (indium-gallium-arsenide), which boosted the efficiency of Sharp’s previous cells from 31.5% to 35.8%.
By Tina Casey •
October 24, 2009
Mercury pollution is next on the list of global health threats to face concentrated action with the goal of elimination. According to Zero Mercury Working Group, yesterday the first significant steps toward a binding treaty to control mercury pollution were announced at a United Nations Environmental Program meeting in Bangkok, Thailand, in advance of negotiations that will take place in Stockholm next summer.
The global nature of mercury pollution lies in its ability to travel long distances from its point of emission through the food chain. In fish it accumulates in its most toxic form, methylmercury. Zero Mercury hopes to achieve a treaty by 2013 that promotes more sustainable alternatives to mercury in products and industrial processes, with the broad goal of addressing all controllable emissions of mercury in the environment.
By Tina Casey •
October 23, 2009
Solar water disinfection is an idea so simple, it hurts. Now a Georgia Tech scientist may be on to a new high-tech twist that could make this no-cost, zero emission ultraviolet (UV) water disinfection method even more quick and effective.
Solar disinfection is a proven method of killing germs in drinking water by exposing it to direct sunlight in a clear plastic or glass bottle. Dr. Jaehong Kim of the Georgia Institute of Technology has just been awarded a $100,000 innovation grant by the Water Environment Research Foundation for his work in developing a new coating that could be applied to bottles to shorten the solar disinfection process and improve its effectiveness. Though not (yet) practical for large volumes of water, solar disinfection has proven to be a sustainable answer for people in remote locations or impoverished areas that lack the resources to disinfect their drinking water through other means.
By Tina Casey •
October 19, 2009
The U.S. military has been pushing for the development of alternative fuels for a while now, and nobody paid much attention until the Pentagon finally put a price tag on the oil habit. As reported by Roxana Tiron in thehill.com, last week Pentagon officials disclosed that getting conventional petroleum fuel to remote combat locations in Afghanistan costs a whopping $400 per gallon.
There couldn’t be a more clear illustration of why the “drill baby drill” mentality is a non-sequitur when it comes to energy security. Regardless of whether petroleum fuels are domestic or imported, they need to be transported to their point of use. That’s not much of a problem when you’ve got modern seaports, highways and fuel depots, but to paraphrase one infamous former Secretary of Defense, you have to fight the war you have, not the war that’s got the ideal infrastructure to support your fuel of choice.
