New Electric Bike Models to Make Waves in California Bike Share System

Last week I described a bike-sharing pilot project that will put 10,000 bikes on the streets of the San Francisco Bay Area by 2012. An unintended consequence of bike-sharing systems, both in California and elsewhere, is that they may well end up being a boon for an electric bike industry surging across North America.

San Francisco's green neighbor to the north, Sacramento, is now experimenting with a four-week trial of a bike sharing system using the innovative BionX electric bike as a featured model. The bike features a battery, electric motor and handlebar control panel, all connected with sophisticated energy-management software. The electric motor system can even be custom-installed on non-electric Trek and Diamant bikes.

Forgive me, but this picture of a corporate doucher should have been a headline for Stuff White People Like

The testing period of Sacramento's bike sharing program will be among employees at the California division of the EPA, hardly a tepid audience for bike sharing. Adding to Sacramento's unsung appeal as a bicycling capital is its rate of bicycle commuting that is among the highest in the country.

If this Sacramento bike sharing project goes smoothly, it could easily lay the groundwork for other smaller and medium-sized cities to get their bike sharing systems up and running. I'm talking to you, Portland :). The ability to step onto a bike and pedal (or not) around the city for pocket change is all the more enticing with electric bikes thrown into the fray.

Another model that will hopefully join the bike-sharing menu is this badass piece of machinery right here, the M55 Beast Hybrid. This powerhouse of a bike can reach speeds of 40 mph, as good as any vespa or scooter, and can go for 75 miles on a single charge. Upon further investigation, the bike is made of carbon-fiber and titanium alloys, which probably means that like the Tesla Roadster, it is a beautiful unicorn of a machine that mere mortals will never get their hands on. Sadness....

Via: Inhabitat

Biodiesel from Sewage Sludge Costs Just 10 Cents More than Regular Diesel!

The key difference between biofuels that are truly green (say, cellulosic ethanol) and those that aren't, like corn-based ethanol, is the biofuel's source: is it a valuable food product - like most blends of ethanol - or is it genuinely a waste product?

I think we can all agree that there is no doubt that sewage sludge is the very definition of a waste product. According to a new EPA report, biodiesel generated from the sewage sludge leftover after wastewater treatment costs just 10 cents more per gallon than conventional diesel.

The secret ingredient is the addition of oil-producing bacteria that create the biofuels as a waste product during photosynthesis. Research at Arizona State University showed that genetic engineering of these photosynthetic bacteria can help to maximize the biodiesel output they release. Potentially, this type of sewage-generated biodiesel could be on the market for as little as $3.11 per gallon (less than regular gas in Seattle, thank you very much!)

There are a few potential stumbling blocks here, though. According to Inhabitat, 

The best practices for getting biodiesel this way have hardly been worked out yet, according to the study by EPA scientist David Kargbo. Among the biggest problems is finding a way to collect sludge that is high in lipids — the material the reaction uses — ensuring that traces of pharmaceutical chemicals don’t make it into the fuel. Finally, regulators haven’t even begun to assess what it would mean to transfer large amounts of sewage sludge to private companies for processing into biodiesel.

Operationally, it seems like retrofitting all of our sewage-treatment plants to create large amounts of commercially-viable biodiesel could be very challenging. But compared to other biodiesel alternatives like waste vegetable oil from restaurants or soy-based biodiesel from the Amazon rainforest, the idea is looking more attractive every day.

Via: Inhabitat

Promising New Research on Cellulosic Ethanol

Cellulosic ethanol is one of the most promising developments in the bio-fuel arena that large fleets have the potential to cultivate. Unlike other bio-fuels, such as corn or soy-based ethanol, which according to a recent EPA report may in fact create larger carbon footprints than conventional petroleum gasoline, cellulosic ethanol has the potential to yield up to 200% more biodiesel oil than soy-based alternatives. One of the least-developed bio-fuels, cellulosic ethanol is derived from algae in a process that extracts biodiesel from the fats in the algae material. See the diagram below for a more detailed explanation of the extraction process:

This makes cellulosic ethanol one of the most carbon-efficient fuel options on the market apart from the more unlikely hydrogen fuel-cell options. According to Evergreen Fleets, cellulosic ethanol represents an 85% reduction in net carbon emissions per gallon than conventional petroleum gasoline. Unfortunately, the algae-growing operations necessary to produce commercially viable quantities of cellulosic ethanol have not been established to a sufficient scale for fleets to purchase large amounts of this new fuel.

Current research at Sandia National Laboraties (begun in 2007) has focused on breeding the optimal strains of algae that have the highest fat ratios. According to Ali Kriscenski at Inhabitat, "the biggest challenge is to make algae biocrude within a fraction of the time that nature’s biomass decomposition occurs and to do it economically, for less than $60 a barrel."

Most university research has focused on creating apparatuses that will do exactly that: create a pressure-cooker environment to extract fats from the algae and convert it to biodiesel in an economical timeframe.

One such project at the University of Illinois at Champaign-Urbana, titled "BioGrow", uses old computer parts to create such a vessel for algae production. Using an Apple G4 CPU tower, PVC pipes, acrylic panels, an Apple iMac CRT, and high density foam for insulation, graduate students modified the old computer to allow the iMac CRT to turn on different light spectrums and to adjust the temperature. The makeshift tank contains a water pump that aerates the algae for a faster energy conversion process. The byproducts can be used for feedstock, fertilizer and high-end pharmaceuticals because algae is so rich in protein and nutrients. In addition, this method helps alleviate the problem of electronic waste, which often leach toxic heavy metals into the soil and groundwater when they end up in landfills.

Another group of scientists at Stanford University attempted a slightly different method by inserting electrodes directly into algae pools, attempting to intercept the electron flow that occurs during the natural process of photosynthesis. This method is a type of photosynthetic electrolysis that produces no emissions other than oxygen, distinguishing it from the more mainstream production method of cellulosic ethanol. However, this experiment was not able to produce enough energy per algae cell to be commercially viable for mass production.

At the University of Michigan, researchers have also been experimenting with a pressure-cooker apparatus that will reduce the time and money needed to convert algae into biodiesel. According to Sarah Parsons (also of Inhabitat),

"The pressure cooker works by heating microalgae up to about 300 degrees, forming an algae soup. The high temperatures combined with the pressure breaks the plants down, releasing the native oil and causing proteins and carbohydrates to decompose, adding to the fuel yield. Cooking the “soup” for 30 minutes to an hour yields a crude bio-oil, which can then be converted to fuel."

This process has the advantage of eliminating the need for high-oil content strains of algae, allowing microscopic and less-oily species of algae to be used and removing the need for drying out the algae outdoors. An indoor production mechanism of cellulosic ethanol, rather than drying out algae in vast outdoor pools, has the potential to be widely cultivated, assuming reasonable installation costs, even by individual fleets themselves.

So what does the future look like for cellulosic ethanol? Sapphire Energy, a San Diego-based energy startup, has pioneered the first cellulosic ethanol-powered vehicle, the aptly-named Algaeus.

Claiming to reach fuel efficiencies of 150 miles per gallon on a fuel blend of 5% cellulosic ethanol, the company outfitted a plug-in hybrid Toyota Prius to run across the country on 25 gallons alone! The possible fuel economies of future cellulosic ethanol vehicles is staggering if you imagine how efficient the models would be if, instead of a 5% blend, an E85 or B40 blend were produced, as has already been manufactured for corn and soy-based biodiesel.






Via: Inhabitat, Discovery News

Obama Administration Announces Improved Federal CAFE Standards

Although Evergreen Fleets may be the nation's first Green Fleets certification program, it soon may have a large number of competitors, thanks to a groundbreaking new policy of the Obama Administration. 


The CAFE - Corporate Average Fuel Economy - standards that govern the fuel economy of the American auto industry have been significantly strengthened in a new federal policy. In a surprisingly progressive move given America's history of resistance to environmental regulation, the new CAFE standards explicitly link a reduction in total greenhouse gas emissions to improved fuel efficiency in our national fleet, the first time the CAFE standards have made such a connection in their history.


According to WorldChanging, a Seattle media non-profit, "covering vehicle model years 2012 to 2016, the legislation will require car makers to achieve an average fuel economy for their fleets of 35.5mpg in 2016 (with 39mpg specified for cars and 30mpg for light trucks). It will replace the current CAFE standard of 27.5mpg for cars and 24mpg for light trucks." 

The standards are very similar to a California proposal that, until a May 19, 2009 EPA waiver granted by Obama, had been declared unconstitutional by the Bush Administration. Before Obama's decision, seventeen other states had agreed to follow California's CAFE standards as soon as the EPA waiver was granted. Mr. Obama's new CAFE standards now supersede any state's CAFE standards and aim to bring the nation's cars and trucks to a fuel efficiency more on par with European standards.


Naturally, both California's efforts to unilaterally set its own CAFE standards and the new standards recently set by Obama generated enormous resistance from the auto industry. However, the new CAFE standards, assuming they are followed, are estimated to have the equivalent impact of saving 900 million tons of carbon or removing 3.7 million cars from the roads.

SF Bay Area to Build the Nation's First Electric Vehicle Charging Network

Electric vehicles have been identified as a crucial technology for reducing the carbon footprint of our nation's fleets, above all because they produce no greenhouse gas emissions.

Evergreen Fleets has defined electric vehicles as the preferred option for "neighborhood vehicles" (NEVs) designed for short trips in their Best Practices section, due to the current market shortage of vehicles capable of traveling on freeways. This market shortage is poised to dramatically change in the coming months, as the Nissan Leaf (fully electric) and the Chevy Volt (plug-in hybrid-electric) are introduced as affordable, freeway-capable models.

However, even when new plug-in hybrid and fully electric models are introduced to the market, the question of the availability of an adequate charging infrastructure remains.

According to a recent EPA study, the Chevy Volt would only achieve a fuel efficiency of 48 miles per gallon, assuming its electric battery has been fully charged. The fully-electric battery has a range of 40 miles, after which a gas-electric generator kicks in for the remaining 300 miles until the vehicle needs to be refueled. While the vehicle is in its fully electric mode, its fuel efficiency approaches 100 miles per gallon.  After the initial 40 mile range of fully electric power, the vehicle's efficiency drops dramatically, bringing its aggregate fuel efficiency to the figure of 48 m.p.g. cited above. While the 40-mile range of fully-electric power covers the average commuting distance for over 75% of Americans, to be truly practical, an inter-metropolitan network of electric charging stations outside of the home must be created to facilitate this vehicle's optimal fuel efficiency range.

This is even more  true of the Nissan Leaf, whose fully electric range is only 100 miles and lacks a gas-electric powertrain - when the Leaf runs out of electric charge, the driver has no choice but to pull over and search for the nearest charging station. An 8 hour charge is needed for the Leaf, suggesting that to be truly effective and convenient for drivers it must be charged periodically throughout the day.

A Bay Area venture capital firm, Better Place, in November 2008 committed to a $1 billion investment for the first electric vehicle charging network in the United States. The Mayors of San Francisco, Oakland, and San Jose each threw their support behind the network partnership. The network is anticipated to become operational in 2012.

In response to the regional plans for this electric vehicle charging network, the City of San Francisco recently announced a change to its building code that would require new buildings to have an outlet for charging electric vehicles. As a New York Times article pointed out, there is serious concern among public utilities that the rapidly expanding demand for electricity due to the charging of electric vehicles could overwhelm local electric grids if vehicles like the Nissan Leaf become widely popular. City officials anticipate having 60 charging stations operational within San Francisco by the end of 2010 and more than 1,000 throughout the Bay Area by 2011. In addition to venture capital funding, large portions of this network will be funded by a $200 million subsidy from Obama's stimulus package.

Two key concerns over the introduction of this electric vehicle charging grid are 1) the true reductions of greenhouse gas emissions, which depend on the electricity's source and 2) the popularity of electric vehicles in regions outside of the relatively wealthy Bay Area (a 240watt home charging kit for an electric vehicle can run up to $1,500).

A Breakdown of Life Cycle Analysis

Here is a more detailed portrait from the EPA of life cycle analysis, a concept that analyzes energy or product investment based on its total cradle-to-grave costs of production (including production of sub-products or materials), refinement, distribution, and consumption.

What is very telling about these charts is the degree to which highly-touted alternative fuels - corn-based ethanol, for example, have been promoted without much regard to whether they are significantly "greener" than conventional petroleum gasoline. This is a great example of how production itself becomes politicized in our society, with various interest groups lobbying federal and state legislatures on behalf of energy sources for which there may be little, if any, environmental benefit. Others argue that any displacement of petroleum gasoline itself is an environmental benefit, regardless of whether using the alternative fuels truly reduces overall greenhouse gas emissions.