by jboullion | Dec 10, 2008 | Uncategorized
From an article by Don Behm in the Milwaukee Journal Sentinel:
Sun seekers and swimmers put off by slimy, foul-smelling cladophora algae covering Lake Michigan beaches and rocky shorelines in summer have a pair of new allies in the ongoing battle with the nuisance plant: Daniel Zitomer and hungry microbes.
Where some see a putrid eyesore, Zitomer sees a sweet opportunity to make energy.
Allow bacteria and other microbes known as archaea to digest the stringy algae in enclosed tanks and the end product is methane, said Zitomer, an associate professor of engineering and director of the Water Quality Center at Marquette University.
The same goes for animal droppings at the Milwaukee County Zoo, as well as waste from food processing, candy making or even distilling liquor. Each is rich in organic carbon compounds, and they, too, could yield methane if digested by a diverse set of microbes.
Then, Zitomer says, burn the methane to generate electricity to lessen demand for energy from coal or natural-gas-fired power plants and reduce emissions of carbon dioxide and other gases from the power plants that could contribute to global warming and climate change.
The tanks and microbes he wants to fill with cladophora and organic wastes from the community are at the South Shore Wastewater Treatment Plant in Oak Creek.
The Milwaukee Metropolitan Sewerage District uses bacteria and archaea to digest human feces and other sewage solids removed during the beginning of the treatment process at the Jones Island and South Shore plants. The blend is mixed and heated in four separate tanks with capacities of 3 million gallons each and two smaller tanks with half that capacity at South Shore.
Nearly a decade ago, Zitomer identified a seasonal waste – aircraft de-icing fluids from Mitchell International Airport – that could be poured into the digesters to boost methane production.
Christmas will come early again this year for billions of bacteria and other microbes in the below-ground tanks at the South Shore plant. The winter’s first tanker full of de-icing waste – propylene glycol and water – arrived last week.
The addition of glycol to the tanks has the same effect as tossing sugar-loaded candy to children: It sets off a feeding frenzy among bacteria and archaea, Zitomer said.
Glycol molecules are broken apart by bacteria, then quickly fermented into acids, which are converted to methane by the archaea. Both groups of microbes working in the tanks thrive in warm, oxygen-free environments.
Since 2000, the airport has shipped between 250,000 and 300,000 gallons of the waste each winter to the South Shore plant. Tankers arrived more frequently last winter, however, and the treatment plant received a record 500,000 gallons.
In October, a separate partnership between InSinkErator, the Racine-based maker of food waste grinders, and Outpost Natural Foods on S. Kinnickinnic Ave. started sending small volumes of ground vegetables to the digesters at South Shore.
In 2007, the total energy value of methane produced in the digesters was estimated at $1.9 million, MMSD chemical engineer Jeff Schilling said. That dollar figure equals the money MMSD saved by reducing energy purchases for the plant. No estimate was available on the value of methane provided by adding the de-icing waste, he said.
by jboullion | Dec 9, 2008 | Uncategorized
From a media release issued by Focus on Energy:
MADISON, Wis. (Dec. 8, 2008) – Focus on Energy, Wisconsin’s energy efficiency and renewable energy initiative, announced today the inception of a new renewable energy program called Fuels for Schools & Communities. The new program is meant to help Wisconsin schools and communities save hundreds of thousands of dollars in energy costs by switching from natural gas to heating their buildings with wood or other biomass.
“Schools and local governments today are feeling squeezed by energy prices. This new program will allow interested school districts and local governments, especially in the north and southwest portions of the state, the ability to adopt biomass technology as a cost effective and environmentally responsible solution to increasing energy costs,” said Don Wichert, director for Focus on Energy’s Renewable Energy Program.
The new program offers interested schools and communities pre-feasibility studies and feasibility studies at no cost and up to $250,000 toward the implementation of a biomass system. The program complements Clean Energy Wisconsin, Governor Doyle’s strategy to strengthen Wisconsin’s energy future. This comprehensive plan moves Wisconsin forward by promoting renewable energy, creating new jobs, increasing energy security and efficiency and improving the environment.
A recent study funded by Focus on Energy and conducted by the Biomass Energy Resource Center (BERC), “Heating with Biomass: A Feasibility Study of Wisconsin Schools Heated with Wood,” found that as many as 25 percent of Wisconsin schools could save hundreds of thousands of dollars in energy costs by switching from natural gas to heating their buildings with wood, or other biomass. Biomass, a renewable resource, typically consists of clean wood chips, wood pellets, switchgrass or other agricultural based pellets. This is a significant finding considering Wisconsin schools spend close to $200 million a year on energy costs.
The study concludes that the annual energy costs from wood biomass systems could be 29 percent to 57 percent less expensive than natural gas and save schools between $53,000 and $75,000 annually, depending on current fuel prices. The study included case studies from Barron, Hayward, Shell Lake and Rice Lake, Wis., high schools.
by jboullion | Dec 9, 2008 | Uncategorized
From a media release issued by Focus on Energy:
MADISON, Wis. (Dec. 8, 2008) – Focus on Energy, Wisconsin’s energy efficiency and renewable energy initiative, announced today the inception of a new renewable energy program called Fuels for Schools & Communities. The new program is meant to help Wisconsin schools and communities save hundreds of thousands of dollars in energy costs by switching from natural gas to heating their buildings with wood or other biomass.
“Schools and local governments today are feeling squeezed by energy prices. This new program will allow interested school districts and local governments, especially in the north and southwest portions of the state, the ability to adopt biomass technology as a cost effective and environmentally responsible solution to increasing energy costs,” said Don Wichert, director for Focus on Energy’s Renewable Energy Program.
The new program offers interested schools and communities pre-feasibility studies and feasibility studies at no cost and up to $250,000 toward the implementation of a biomass system. The program complements Clean Energy Wisconsin, Governor Doyle’s strategy to strengthen Wisconsin’s energy future. This comprehensive plan moves Wisconsin forward by promoting renewable energy, creating new jobs, increasing energy security and efficiency and improving the environment.
A recent study funded by Focus on Energy and conducted by the Biomass Energy Resource Center (BERC), “Heating with Biomass: A Feasibility Study of Wisconsin Schools Heated with Wood,” found that as many as 25 percent of Wisconsin schools could save hundreds of thousands of dollars in energy costs by switching from natural gas to heating their buildings with wood, or other biomass. Biomass, a renewable resource, typically consists of clean wood chips, wood pellets, switchgrass or other agricultural based pellets. This is a significant finding considering Wisconsin schools spend close to $200 million a year on energy costs.
The study concludes that the annual energy costs from wood biomass systems could be 29 percent to 57 percent less expensive than natural gas and save schools between $53,000 and $75,000 annually, depending on current fuel prices. The study included case studies from Barron, Hayward, Shell Lake and Rice Lake, Wis., high schools.
by jboullion | Dec 8, 2008 | Uncategorized
From a media release issued by Dairyland Power Cooperative:
LA CROSSE, WI— Dairyland Power Cooperative has signed an agreement with the
Norm-E-Lane Dairy Farm to purchase the energy and capacity from their anaerobic digester “cow power” facility located in Clark County (Chili, Wis.). Norm-E-Lane is owned by the Meissner family, members of Clark Electric Cooperative.
The facility at the 2,000-cow Norm-E-Lane Dairy Farm is expected to generate about
500 kilowatts of renewable energy, capable of powering 336 homes throughout Dairyland’s four-state service area.
Cow manure is collected and heated in the digester tank, a process that creates methane gas. This biogas fuels a large engine to produce renewable electricity. The process also has additional environmental side benefits, reducing animal waste problems associated with manure disposal on farms. Odor is nearly eliminated, and weed seeds and pathogens are killed during the digestion process, thus reducing the need for herbicides and pesticides on the farm. Also, a useful byproduct is bedding that can be used in the dairy.
Norm-E-Lane is the fourth dairy farm providing “cow power” to members in the Dairyland system. “We continue to seek opportunities to expand our renewable resources and appreciate working with the Meissner family and Clark Electric to bring this environmentally-friendly energy resource to our members,” said Bill Berg, Dairyland President and CEO.
by jboullion | Dec 8, 2008 | Uncategorized
From a media release issued by Dairyland Power Cooperative:
LA CROSSE, WI— Dairyland Power Cooperative has signed an agreement with the
Norm-E-Lane Dairy Farm to purchase the energy and capacity from their anaerobic digester “cow power” facility located in Clark County (Chili, Wis.). Norm-E-Lane is owned by the Meissner family, members of Clark Electric Cooperative.
The facility at the 2,000-cow Norm-E-Lane Dairy Farm is expected to generate about
500 kilowatts of renewable energy, capable of powering 336 homes throughout Dairyland’s four-state service area.
Cow manure is collected and heated in the digester tank, a process that creates methane gas. This biogas fuels a large engine to produce renewable electricity. The process also has additional environmental side benefits, reducing animal waste problems associated with manure disposal on farms. Odor is nearly eliminated, and weed seeds and pathogens are killed during the digestion process, thus reducing the need for herbicides and pesticides on the farm. Also, a useful byproduct is bedding that can be used in the dairy.
Norm-E-Lane is the fourth dairy farm providing “cow power” to members in the Dairyland system. “We continue to seek opportunities to expand our renewable resources and appreciate working with the Meissner family and Clark Electric to bring this environmentally-friendly energy resource to our members,” said Bill Berg, Dairyland President and CEO.
