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Manure-Powered Generators On The Rise
Sunkist writes "The San Francisco Chronicle has a report on Marin County rancher Albert Straus that, after 25 years of work, began using a generator powered by manure. While this type of 'power' has been in use for a while, recent legislation has made it more widespread. From the article, 'The Straus Farms' covered-lagoon methane generator, powered by methane billowing off a covered pool of decomposing bovine waste, is expected to save the operation between $5,000 and $6,000 per month in energy costs.' Let's hear it for poop!"
In India, they call them gobar gas plants (more details in a 1971 Mother Earth New article). As long as one keeps the 30:1 carbon/nitrogen ratio, they can consume other organic waste too (grass clippings, urine, food waste, etc.). The only problem with them is that they tend to create hydrogen sulfide that makes the gas highly corrisive to iron equipment (some people use a filter of steel wool to remove the H2S).
Two wrongs don't make a right, but three lefts do.
Without forrest like we used to have...
Many forests around the world have been significantly depleted, but the myth of deforestation in the U.S. is just that, a myth. There hasn't been a significant decrease in plantlife except in very urban areas, like New York.
Also, on a world wide scale, much of the plantlife that handles the CO2 issue is in the ocean. I don't remember the number, but something like 70% of the CO2 converting plants live in the ocean. I think that's the bigger issue.
Slashdot Syndrome: the sudden, extreme urge to correct someone in order to validate one's self.
I read recently that there's enough old growth forest in the US to make a band as wide as texas from NY to Seattle.
Much of it is in undesirable areas (mountains etc) or protected parks so it's pretty much safe.
I don't need no instructions to know how to rock!!!!
I know you're just trying to be funny, but I thought I'd point out there's a reason why this is being done for dairy cows instead of beef cattle. Dairy cows tend to shit in a barn while they're being milked. This creates a lot of waste in a small area, that we typically just hoss out the back. Of course, there's no reason you couldn't hoss it into a container, and then dump that somewhere else where it could be better used.
Slackware, what else when it must be secure, stable, and easy?
Sorry to disappoint some but the human stuff is at least in the USA very often used for methane production. Many municipal Sewerage Treament plants do this already. Decatur Alabama has done so for years and runs many city cars on it. Florence Alabama drilled their landfill and did same.
Never Politically Correct ~ I prefer the facts If you don't like what I say, get a life, or comment yourself.
See the Green-E website. Many landfills already extract their methane emissions. This is good even from a global-warming perspective, as methane is also a greenhouse gas. Finally, the EPA has tips on reducing methane emissions from livestock themselves, as opposed to their turds.
Can't you see that everyone is buying station wagons?
> Still pretty sh*tty in terms of greenhouse gas emissions so it wouldn't help meet Kyoto targets
On the contrary. First, it would cut HC4-emission, which is an even more effective greenhouse gas and listed in the Kyoto protocol. Second, it could reduce CO2 emissions, as the energy is produced locally and cuts the transport losses.
"Between strong and weak, between rich and poor [...], it is freedom which oppresses and the law which sets free"
They still use it as fertilizer. While it's sitting in the lagoon decomposing, they capture the methane (instead of letting it outgas into the atmosphere). Then they take the good stuff out of the lagoon and spread it.
Regarding Net Metering, you asked "Why do we allow laws that strip us of potential income, and benefit companies like PG&E?"
Well, it's actually a bit more complicated than all that. One of the major problems with building a new generator is getting that generator to play nice with the existing transmission/distribution grid. This business of connecting the generator with the grid is called "interconnection." It's not an easy thing to interconnect a generator, and hooking up new green power technologies is especially troublesome. (Wind is the most difficult, with solar being the easiest.)
The federal government has been working on creating new standardized rules for interconnection of small (read: green) generators, but it's an incredibly complicated process that's taking years to complete and isn't even done yet.
So, what does all this have to do with Net Metering, you ask? Well everything.
Net Metering is a state jurisdictional program (meaning each state has its own rules) that avoids the whole interconnection process. While you are still hooking up with the grid, the power flows involved in a Net Metering program are so small in comparison that the process is much quicker and much, much cheaper.
The deal is however, that you cannot export (meaning feed energy into the grid) more power than you consume over the course of the billing period (usually a month).
Take a photovoltaic system - during the day a well built system (and we're not talking people who are entirely off the grid here) may both supply the energy needs of your house and produce some extra energy. That energy is sent out to the grid. Your electric meter essentially runs backwards for that period of time. Then, at night, you resume taking energy from the grid to run your house. At that point your meter is running forward and your bill is increasing. Say over the course of a month you take 1000 kw of electricity of the grid at 8 cents / kw. Usually your bill would be $80. But, over the course of that same month say you pumped 100 kw of energy back into the grid (for a net consumption of 900 kw) - you would receive an $8 credit off of your bill.
Now take the example of Farmer Brown who wants to turn shit into gold (that's the phrase the brochures use - "shit into gold"). Say he (through whatever means) puts 10,000 kw (or 10 MW) onto the system - all of a sudden he likely no longer qualifies for a net metering program and has to take the trouble of actually entering into an interconnection agreement and conducting studies to make sure he's not going to fry some lineman somewhere further down the grid (or more likely, simply overload the local lines and fry a small portion of the grid). Sure, he'd love to use net metering - the utility is required to buy whatever power he produces, the price is set at the retail price for electricity, the price of interconnection is cheap, but he's no longer eligible. So he has to go through the interconnection process, find buyers to buy his energy at wholesale (either by himself, or more likely through what are called "Aggregators"), and he's basically in the energy business with all the regulations and resonsibilities that entails.
But don't feel too sorry for Farmer Brown -- turns out that one of the major expenses in running a dairy farm (who knew) is electricity! Most spend thousands and thousands of dollars on their electric bill every month - so to the extent they can offset even a portion of that through net metering, that there shit really is golden!