Back to Energy Efficiency Basics
The nuclear plant tragedy in Japan, which has already compounded the disaster in the coastal communities north of Tokyo, highlighted the complexity and dangers endemic to trying to meet our growing energy needs.

- Photo by Argonne National Laboratory via flickr.com
Last November, the Wall Street Journal published “Changing the Energy Conversation.” In the article, the author suggested that because clean energy is still more expensive to generate than the traditional, polluting alternatives, there are other things that we in high-polluting countries can do to reduce the impacts of climate change. The smaller stuff includes helping poor countries to replace old diesel generators and wood stoves with more technologically-advanced alternatives and capturing methane, the incredibly potent greenhouse gas, with 21 times the global warming potential of carbon dioxide. Other suggestions included modifying the Clean Air Act.
An essential and much simpler approach he didn’t mention is to encourage recycling.
Imagine this: it’s warm outside and you are hosting a neighborhood barbque. You invite your college friends, your parents, people from church, from work, and casual acquaintances. They all show up. The result of this one day’s relaxing, eating and drinking is 48 12 oz. aluminum cans, 21 glass bottles, 3 glass wine bottles, 6 12 oz. plastic bottles, 5 2-liter soda bottles, 3 boxes of corrugated cardboard, and the 10 plastic grocery bags you needed to carry the stuff home from the grocery store. You may or may not also have a plastic bottle of antacid.
According to the EPA, if you just recycle that one day’s worth of stuff, you’d save the equivalent of 21.6 kilowatt hours of delivered electricity. That would be like not running your laptop computer for just over 18 days, or not using a 60 watt lightbulb for almost 2.5 months.
To better imagine the impact you could have by recycling, think of all the households who barbque on a nice spring or summer day in your town. Think of all the get-togethers to watch football or baseball on TV. Think of all the birthday parties, picnics, family reunions, graduation parties in your town. In this hypothetical town, say there are 50 thousand people, and one person in five goes to one of the events in a year. Now we’re talking about running a lightbuld for 1,927 years.
Ok, now imagine that the U.S. Census numbers still hold and there are 311,190,829 people in the United States. What kind of impact would that have?
You can learn more about recycling and climate change by viewing the EPA-sponsored videos about the connections among consumption, recycling and climate change.
Changing Waste into Biofuel
Guest blogger, Chris Choate, VP of Sustainability at Recology, leads us through the dynamic world of creating biofuels.
What’s eating my garbage now???
In a January Article “Microbes Produce Fuels Directly from Biomass” author Lynn Yarris of Lawrence Berkeley National Laboratory, reports that “deploying the tools of synthetic biology, U.S. Department of Energy’s Joint BioEnergy Institute (JBEI) researchers engineered a strain of Escherichia coli (E. coli) bacteria to produce biodiesel fuel and other important chemicals derived from fatty acids.” Scientifically, this is very exciting news!
Recology is driven to find the social, environmental, and economical solution to powering a fleet of vehicles with a fuel produced from the residual resources (waste material) of your trash. We have evaluated, researched and collected knowledge on how-to generate and utilize biomethane from our landfills and anaerobic digesters to power our trucks. We have started integrating biofuels into our fleet fuel sources by converting equipment and utilizing compressed natural gas (CNG), liquefied natural gas (LNG) and B20 biodiesel. Having a biodiesel fuel created by E. coli bacteria from the waste material we collect would absolutely be consistent to our rally cry of Waste Zero.
Recology continues to partner with the City of San Fracisco in their effort to lead the nation in diverting material from landfills. Over 70% of the material diverted is collected through an integrated system of reduction, reuse, recycling and composting. Even with all this activity, over 62% of the current material going to the landfill is degradable and a good source of biomass material. From our research, Recology has found that refuse-derived biomass is a good source of fatty acids. For Recology to deploy the tools of biology is key to achieving the Zero Waste goal.
The City’s Department of Environment created the City’s Zero Waste Plan from over-riding environmental principles that include:
- Reusing materials at a level that is their next best and highest use
- Avoiding high-temperature conversion (incineration)
- Achieving the highest carbon footprint reduction possible
- Employing local and biological processes that mimick nature
Currently a biology process is used, managed, and exploited to stabilize thousands of tons of rotting organic material a year via a process Recology uses and proudly calls composting. To further employ a biological process to produce a biodiesel from the remaining residuals in the city’s waste stream is consistent with these over-riding principles. However, the term synthetic is a concern and would require further evaluation regarding any potential biohazard that could be created by the engineered strain of E.coli. That alone may delay the commercialization of the discovery for a good many years.
Stay tuned! The appetite for something that will eat my garbage is changing fast…
The green and sustainable landfill?
In December, 2009, BioCycle published an article on the amount of electricity that could be generated from the methane emitted from a Michigan landfill. The author corrected the misperception that there was enough landfill gas emitted from the landfill to generate 300 MW of electricity. 300 MW is a lot of electricity. In reality, the potential was closer to 4.5 MW. Wishful thinking and incomplete information have a lot to do with the public perception that landfills are ”green” and sustainable.
In general there are two hopeful stories out there about “green” landfills:
- The gas emitted from them can be used to generate electricity, and therefore they are green, and
- The long buried materials in their bellies can be harvested at a later time and recycled.
Landfills that are already in use generate methane as the organics that are buried there decompose. The US Environmental Protection Agency has a simple pamphlet explaining the link between climate change, greenhouse gas generation, and waste management. It also explains why recycling reduces the generation of greenhouse gases.
There are three quick points to make regarding the “green” landfill:
- Although landfill gas can be collected and used to generate electricity, the best collection systems still only collect 70% (at most) of the emissions while they are installed. The percent collected is actualy more like 40-50%. The methane generated before installation and after decommission is still emitted into the atmosphere.
- The recyclable material in landfills (glass, metals, plastics, and paper) degrades and shatters or corrodes, reducing the reuse value of the materials and increasing the health hazards to the people tasked with excavating them.
- There is no such thing as a sustainable landfill. The materials that endup burried in a landfill are not returned to society as productive assests. For example, if the gas from a landfill is collected and made into a biofuel, the biofuel can be used as an alternative to gasoline or diesel fuel, but it cannot replenish the soil or be used to raise new crops.
While products and materials continue to be designed without consideration for their full lifecycle (raw materials extraction, manufacturing, transportation, installation, use, reuse, decomission and disposal), and we while continue to be a throw-away society, landfills will have a place. However, as the UK’s Department for Environment Food and Rural Affairs posts on their website, “landfills should become the home of last resort for waste.” The US Composting Council, recyclers, and people everywhere understand this, and continue to push to find the best and highest use for landfill-bound materials. It takes a little coordination, a little communication, and minimal effort from consumers.
The road to WASTE ZERO
What did you get for Christmas, Kwanza, or Hanukkah? Despite the economic downturn, this holiday season is no different from any other. We buy and sell stuff. This year I browsed the shelves at Toys R Us and found more board games, toy cars, miniature kitchen sets, video game consoles, stuffed toys and remote controlled planes that I remember as a kid. Part of me wanted to take it all home–the plastic ponies and updated Scattegories games, the Star Wars action figures, and limited edition Transformers, everything–just for the fun it promised. Ah, stuff.
In a May 2009 article, “Waste Not“, one of The Atlantic magazine’s authors writes that “… while American companies have ruthlessly wrung out other forms of inefficiency”, a fraction of the energy our companies waste is enough to ”power all of Japan.” Although it is true that we waste vast amounts of energy in making stuff, it is big fallacy to claim that American companies have reached the pinnacle of efficiency in resource management. Just take a look through a garbage can at your local mom and pop’s, at the largest of conglomerates, or after your family’s get together.
Recology is focused on “waste zero” because there’s a long way to go before Americans can say we use our resources effectively. For example, for every 1 ton of trash that is not recycled, an additional 71 tons of waste was created upstream through extracting raw materials, manufacturing, and distributing them (see Stop Trashing the Climate.)
San Francisco mayor Gavin Newsom recently wrote that “[i]ncreasingly, local and state governments are adopting ‘zero waste’ goals to counter the real dangers of climate change and worldwide resource depletion. But what does ‘zero waste’ mean? Simply put, it means nothing goes to landfill.” Mayor Newsom is right–instead of relying solely on new technology to solve everything, ”reuse, recycling and composting make the most of our resources and create good, green jobs a long the way“. Recycling reduces our need for extracting raw materials, reduces the energy we need to manufacture new products, and avoids generating greenhouse gases from transportation and manufacturing. Composting on a large scale replenishes the agricultural land we depend on for our food supply. According to the Institute for Local Self Reliance, each additional 10,000 tons of materials recycled equals 35 new jobs.
So why don’t we just burn the Barbie doll boxes, the plastic baggies for our iPhone components, and all of that wrapping paper? Incineration is often touted as a “green alternative energy solution” by burning landfill-bound material and using the heat to generate energy. Clearly though, incineration technologies don’t solve our resource or energy problems. Generating energy from trash does not provide the growing world population with the manufacturing materials needed to meet the growing demand for more products.
It also does not provide a sustainable source of energy, because the trash needed for an incinerator to generate energy will eventually run out, just like the natural resources that make up the products we buy and sell. As Newsome writes, “…when we burn recyclables, we capture only a small amount of energy compared to all the upstream energy used to make those products… It also leaves behind toxic ash, slag and air emissions, including putting a lot of carbon into the atmosphere.”
But “waste zero” is not “zero waste”. We know that we can’t prevent everything from being buried at the landfill or burned–at least not yet. Why is that? Because:
- Today’s products are not all recyclable. Manufacturers have to take responsibility for making things that we can fully recycle again and again.
- We don’t recycle enough. People need to demand recycling programs in cities where there are none.
- Changing our behavior is hard. Our habits as consumers have to expand beyond the low-cost, convenience training we’ve gotten through years of advertising. We should be buying more products made with recycled content.
So, what do we do on this road to waste zero? We make the most of what we have. One simple example can be found at the Recology Ostrom Road Landfill. The landfill has been collecting the methane gas to generate power. Methane gas is produced as organic material in the landfill decomposes. The landfill gas-to-energy plant generates 1.6 megawatts per hour, enough energy for 1,500 homes. Recology’s solar-powered leachate system also collects the liquid and gas that gather at the bottom of the landfill to capture additional methane.
Recology is already the leader in recycling and composting, but as one Recology General Manager said, the Ostrom Road Landfill project is “just another way we are taking technology and benefiting the environment.”


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