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Thanks, Eric, for posting this. It¹s my good old hometown, Columbia, MO! Sure would be nice if Peter Anderson were still on this list serve to get the conversation heated up. Imagine, 2.5% of a city¹s energy needs in 10 years time! There is no mention of operating costs (which must mean this baby will run cheap), but $1.6 million to build the unit is pretty inexpensive (which really makes me wonder about the philosophy of low bid public procurement). Also, only 40,000-50,000 gallons of water a day. Hmmmm...green energy, huh? I wonder if they calculated the amount of energy saved through recycling, composting and waste reduction of the same material. All funnin¹ aside, we are entering a new phase of technology experimentation in this land of plenty. We all need to be on our toes. Recycling and composting is now seen as old school. db -- David Biddle, Executive Director <http://www.blueolives.blogspot.com> Greater Philadelphia Commercial Recycling Council P.O. Box 4037 Philadelphia, PA 19118 215-247-3090 (desk) 215-432-8225 (cell) <http://www.gpcrc.com> Read In Business magazine to learn about sustainable businesses in communities across North America! Go to: <http://www.jgpress.com/inbusine.htm> on 2/13/07 10:30 AM, Eric Lombardi at eric@no.address wrote: > Greetings all, > > The language of change are like the pixels that form an image. Thus, the > landfill industry is in the process of defining itself as a ³green energy² > contributor to our society ? and we all know how warm and fuzzy that idea is > these days. > > This recent article (below) paints the picture for the public of what the > landfill industry wants a ³bioreactor² to be viewed as. They have the EPA in > their corner supporting them, and they will probably get the majority of the > DNR¹s across the nation to support them as well because they are painting a > pretty picture here? a solution that doesn¹t make anyone change their > lifestyles ? a solution that makes the problem go away AND produce a social > good ? green energy. Plus, it appears to be a genuine improvement over the > dry-tomb landfill (and that is another issue I think we need to discuss > later). We have our work cut out for us if we are to be successful in keeping > the bioreactor landfill from hurting the Zero Waste future society we all > envision. > > I want to create a list of the ³Top Five Reasons the Bioreactor is a Trojan > Horse² ? in other words, it may look like a gift, but in fact hidden from view > are the following threats? and on top of my list is > (1) the ³Life-cycle methane capture rate² ? is it really only 20% with the > best available technology today? If so, then I think we should be calling > bioreactors ³GHG Belching Machines²; > > Anyone else have any candidates for the Top Five list? > > Eric > > <http://columbiamissourian.com/> > Whiff of green energy lurks in city landfill > Plans call for first landfill bioreactor in Missouri > By STEVE BARTEL > > February 12, 2007 > > > > How a bioreactor landfill works > According to the U.S. Environmental Protection Agency, a bioreactor landfill > is one that ³operates to rapidly transform and degrade organic waste.² In a > traditional landfill, waste is dumped into a ³dry tomb,² covered and allowed > to decompose naturally in the absence of oxygen, which inhibits the process. > The anaerobic bioreactor proposed for the Columbia landfill will use the same > system but inject 40,000 to 50,000 gallons of water per day into the tomb, > called a ³cell.² The water will be recirculated through the cell to facilitate > the growth of bacteria that will rapidly decompose organic material such as > paper, food scraps and wood, freeing up more space for incoming waste and > producing more methane, which can be used as fuel. > There are plenty of places to find cutting-edge research and technology in > Columbia. One place you might not think to look, however, is inside a giant > pile of trash. > > Columbia is expected to finalize a contract this week with Jefferson City¹s > Frank Twehous Excavating Co. to begin construction on what could become the > first landfill bioreactor in Missouri. At nearly $1.6 million, Twehous¹ bid is > about $260,000 less than the closest competitor, Fretco Inc. of Warrensburg. > > The methane gas produced by the bioreactor and existing traditional fills is > estimated to account for about 2.5 percent of Columbia¹s energy needs in 10 > years, when the facility would be operating at full capacity. > > The methane would be converted into about 17,010 megawatts of electricity per > year, or enough to power 1,739 homes. > > ³This has been a project that¹s been on the table since 2000,² said Richard > Wieman, solid waste utility manager at the Columbia Sanitary Landfill. ³It¹s > designed to study how well (bioreactor technology) works or doesn¹t work.² > > Other bioreactors, such as those located at the Waste ManagementOuter Loop > Landfill in Louisville, Ky., have seen considerable success. The Kentucky > facility opened its first two bioreactors in 2000 and has since added three > more, covering over 40 acres and capable of holding a total of 5 million tons > of trash. Using 130 wellheads and a new experimental collection system called > multi-plane, the facility captures about 3,600 cubic feet of natural gas per > minute, which is used to heat a nearby General Electric manufacturing > plant.Gary Hater, bioreactor program director at the Louisville facility, saw > his operations personnel assume management of the on-site bioreactors from the > research team just last year. > > > (TYLER METZGER/Missourian) > ³We¹ve progressed out of the experimental stage,² he said. ³It¹s working well > with operations personnel, and we¹re at a point where we¹re making sure our > operations are correct. This is proof that this system is doable.² > > Risky business > > Starting a bioreactor isn¹t as easy as digging a hole and filling it with > water and trash. There are certain risks associated with any landfill, > including the escape of gas, stability issues due to the shifting of > decomposing material, and leachate, potentially hazardous liquid that could > breach the liner at the bottom of the landfill and enter the water supply. > > The Missouri Department of Natural Resources is responsible for approving the > design and construction of a new landfill to ensure it meets environmental > safety standards. Because this project is the first of its kind in Missouri, > no such procedure existed for bioreactors until Jan. 16 of this year, when the > federal Environmental Protection Agency approved the DNR¹s authority to allow > the bioreactor in Columbia. > > ³We¹re learning, in a way,² said Jim Hull, director of the DNR¹s Solid Waste > Management Program. ³We¹ve never approved a bioreactor before. The main things > we¹re looking for are an appropriate site and an acceptable design.² > > Hull expects the permit request from the city ³any time,² and has sent members > of his staff to bioreactor design training and on tours of bioreactor sites in > other states to prepare them for the review of the Columbia design. When the > application is received, a team of engineers, hydrologists and soil experts > will have up to six months to approve or reject the design proposed by Camp, > Dresser & McKee Inc., the Cambridge, Mass.-based consulting firm hired by > Columbia to oversee planning and construction of the bioreactor. > > > The proposed bioreactor would also be a first for Lisa Harrison, the CDM > project manager in charge of the bioreactor design and construction. > > Harrison expects to have the landfill cell? the earthen construction that > holds the trash ? finished by the end of this summer, at which point waste and > high-density polyethylene piping would begin to fill the dry tomb. After about > two years of trash has accumulated, pending DNR approval, water would begin > flowing through the pipes and the decomposition rate would rapidly increase, > if everything goes as planned. > > John Bowders, of the MU Department of Civil Engineering, said the effect of > water-aided decomposition can be dramatic. > > Settlement, the reduction of the amount of waste in a cell, is usually around > 5 percent to 20 percent over 30 years in a dry tomb. When a bioreactor is > activated, the settlement figures can be from 30 percent to 50 percent over > five to 10 years. That means the height of accumulated waste in a cell could > be reduced from 100 feet to as little as 50 feet in a few years. > > The decomposing waste in a landfill cell doesn¹t just disappear, however. The > organic material is converted into a problem that has plagued landfill > operators for a long time ? natural gas. > > From trash to useful gas > > Zhiqiang Hu of the MU Department of Civil and Environmental Engineering said > that although it is difficult to name all the bacteria involved in landfill > decomposition, the primary group is called methanogens. As they break down > organic material, methanogens produce methane, a greenhouse gas 20 times more > potent than carbon dioxide and a major factor in climate change, according to > the EPA. Due to the accelerated rate of decomposition in a bioreactor, methane > gas is produced at a much higher rate than in dry tomb landfills, which > already are the primary source of human-related methane emissions in the U.S. > > The Columbia Sanitary Landfill is equipped with technology enabling the > capture of landfill gas, preventing damage to the environment and providing an > opportunity for a new fuel source. The landfill has been collecting methane > since 1994, but not in sufficient volumes to produce electricity. The methane > is currently burnt off, or flared. > > ³It¹s simply a matter of getting enough garbage in place to make (methane > collection) an economical project,² Wieman said. > > With the continued filling of existing cells and the possible increase in > methane production from the proposed bioreactor, Columbia would stand ready to > harness the natural gas as an alternative source of energy. The new design can > accommodate four engines capable of converting the captured gas into > electricity. Wieman plans to start with two engines and add more as the rising > level of stored waste produces more gas. Coupled with the city¹s recent > agreement to purchase electricity produced from natural gas at the dry tomb > landfill in Jefferson City, this new source of fuel would put Columbia well > ahead of alternative energy goals mandated by voters in a 2004 ballot > referendum. > > If the plans receive DNR approval, Columbia will join a handful of cities > around the world in spearheading bioreactor technology. > > ³I see nothing in its way right now,² Wieman said. ³DNR has been very > positive. It¹s fun to be a part of this experiment and leading technology in > Columbia.² > > > > back to the top > <http://columbiamissourian.com/news/print.php?ID=24180#top#top> > > . > Copyright © 2007 Columbia Missourian > > > > > > Eric Lombardi > Executive Director/CEO > Eco-Cycle Inc > Boulder, CO. USA > 303-444-6634 > www.ecocycle.org > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "GreenYes" group. 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