|18 Sep 2005 @ 18:09, by Anthony Marsh|
And what if this tech was available to the Nazi's?
"If a 175-pound man fell into one end, he would come out the other end as 38 pounds of oil, 7 pounds of gas, and 7 pounds of minerals, as well as 123 pounds of sterilized water. While no one plans to put people into a thermal depolymerization machine, an intimate human creation could become a prime feedstock."
No More Waste, No More Pollution, Plenty of Oil
[This article is reprinted from Discover Magazine, Vol. 24, No. 5, 5 May 2003]
In an industrial park in Philadelphia sits a new machine that can change almost anything into oil. Really. "This is a solution to three of the biggest problems facing mankind," says Brian Appel, chairman and CEO of Changing World Technologies, the company that built this pilot plant and has just completed its first industrial-size installation in Missouri. "This process can deal with the world's waste. It can supplement our dwindling supplies of oil. And it can slow down global warming." Pardon me, says a reporter, shivering in the frigid dawn, but that sounds too good to be true.
"Everybody says that," says Appel. He is a tall, affable entrepreneur who has assembled a team of scientists, former government leaders, and deep-pocketed investors to develop and sell what he calls the thermal depolymerization process, or TDP. The process is designed to handle almost any waste product imaginable, including turkey offal, tires, plastic bottles, harbor-dredged muck, old computers, municipal garbage, cornstalks, paper-pulp effluent, infectious medical waste, oil-refinery residues, even biological weapons such as anthrax spores. According to Appel, waste goes in one end and comes out the other as three products, all valuable and environmentally benign: high-quality oil, clean-burning gas, and purified minerals that can be used as fuels, fertilizers, or specialty chemicals for manufacturing.
Unlike other solid-to-liquid-fuel processes such as cornstarch into ethanol, this one will accept almost any carbon-based feedstock. If a 175-pound man fell into one end, he would come out the other end as 38 pounds of oil, 7 pounds of gas, and 7 pounds of minerals, as well as 123 pounds of sterilized water. While no one plans to put people into a thermal depolymerization machine, an intimate human creation could become a prime feedstock. "There is no reason why we can't turn sewage, including human excrement, into a glorious oil," says engineer Terry Adams, a project consultant. So the city of Philadelphia is in discussion with Changing World Technologies to begin doing exactly that.
"The potential is unbelievable," says Michael Roberts, a senior chemical engineer for the Gas Technology Institute, an energy research group. "You're not only cleaning up waste; you're talking about distributed generation of oil all over the world."
"This is not an incremental change. This is a big, new step," agrees Alf Andreassen, a venture capitalist with the Paladin Capital Group and a former Bell Laboratories director.
Andreassen and others anticipate that a large chunk of the world's agricultural, industrial, and municipal waste may someday go into thermal depolymerization machines scattered all over the globe. If the process works as well as its creators claim, not only would most toxic waste problems become history, so would imported oil. Just converting all the U.S. agricultural waste into oil and gas would yield the energy equivalent of 4 billion barrels of oil annually. In 2001 the United States imported 4.2 billion barrels of oil. Referring to U.S. dependence on oil from the volatile Middle East, R. James Woolsey, former CIA director and an adviser to Changing World Technologies, says, "This technology offers a beginning of a way away from this."
But first things first. Today, here at the plant at Philadelphia's Naval Business Center, the experimental feedstock is turkey processing-plant waste: feathers, bones, skin, blood, fat, guts. A forklift dumps 1,400 pounds of the nasty stuff into the machine's first stage, a 350-horsepower grinder that masticates it into gray brown slurry. From there it flows into a series of tanks and pipes, which hum and hiss as they heat, digest, and break down the mixture. Two hours later, a white-jacketed technician turns a spigot. Out pours a honey-colored fluid, steaming a bit in the cold warehouse as it fills a glass beaker.
It really is a lovely oil.
"The longest carbon chains are C-18 or so," says Appel, admiring the liquid. "That's a very light oil. It is essentially the same as a mix of half fuel oil, half gasoline."
Private investors, who have chipped in $40 million to develop the process, aren't the only ones who are impressed. The federal government has granted more than $12 million to push the work along. "We will be able to make oil for $8 to $12 a barrel," says Paul Baskis, the inventor of the process. "We are going to be able to switch to a carbohydrate economy."
Making oil and gas from hydrocarbon-based waste is a trick that Earth mastered long ago. Most crude oil comes from one-celled plants and animals that die, settle to ocean floors, decompose, and are mashed by sliding tectonic plates, a process geologists call subduction. Under pressure and heat, the dead creatures' long chains of hydrogen, oxygen, and carbon-bearing molecules, known as polymers, decompose into short-chain petroleum hydrocarbons. However, Earth takes its own sweet time doing this-generally thousands or millions of years-because subterranean heat and pressure changes are chaotic. Thermal depolymerization machines turbocharge the process by precisely raising heat and pressure to levels that break the feedstock's long molecular bonds.
Many scientists have tried to convert organic solids to liquid fuel using waste products before, but their efforts have been notoriously inefficient. "The problem with most of these methods was that they tried to do the transformation in one step-superheat the material to drive off the water and simultaneously break down the molecules," says Appel. That leads to profligate energy use and makes it possible for hazardous substances to pollute the finished product. Very wet Waste -- and much of the world's waste is wet -- is particularly difficult to process efficiently because driving off the water requires so much energy. Usually, the Btu content in the resulting oil or gas barely exceeds the amount needed to make the stuff.
That's the challenge that Baskis, a microbiologist and inventor who lives in Rantoul, Illinois, confronted in the late 1980s. He says he "had a flash" of insight about how to improve the basic ideas behind another inventor's waste-reforming process. "The prototype I saw produced a heavy, burned oil," recalls Baskis. "I drew up an improvement and filed the first patents." He spent the early 1990s wooing investors and, in 1996, met Appel, a former commodities trader. "I saw what this could be and took over the patents," says Appel, who formed a partnership with the Gas Technology Institute and had a demonstration plant up and running by 1999. Thermal depolymerization, Appel says, has proved to be 85 percent energy efficient for complex feedstocks, such as turkey offal: "That means for every 100 Btus in the feedstock, we use only 15 Btus to run the process." He contends the efficiency is even better for relatively dry raw materials, such as plastics.
So how does it work? In the cold Philadelphia warehouse, Appel waves a long arm at the apparatus, which looks surprisingly low tech: a tangle of pressure vessels, pipes, valves, and heat exchangers terminating in storage tanks. It resembles the oil refineries that stretch to the horizon on either side of the New Jersey Turnpike, and in part, that's exactly what it is.
Appel strides to a silver gray pressure tank that is 20 feet long, three feet wide, heavily insulated, and wrapped with electric heating coils. He raps on its side. "The chief difference in our process is that we make water a friend rather than an enemy," he says. "The other processes all tried to drive out water. We drive it in, inside this tank, with heat and pressure. We super-hydrate the material." Thus temperatures and pressures need only be modest, because water helps to convey heat into the feedstock. "We're talking about temperatures of 500 degrees Fahrenheit and pressures of about 600 pounds for most organic material-not at all extreme or energy intensive. And the cooking times are pretty short, usually about 15 minutes."
Once the organic soup is heated and partially depolymerized in the reactor vessel, phase two begins. "We quickly drop the slurry to a lower pressure," says Appel, pointing at a branching series of pipes. The rapid depressurization releases about 90 percent of the slurry's free water. Dehydration via depressurization is far cheaper in terms of energy consumed than is heating and boiling off the water, particularly because no heat is wasted. "We send the flashed-off water back up there," Appel says, pointing to a pipe that leads to the beginning of the process, "to heat the incoming stream."
At this stage, the minerals-in turkey waste, they come mostly from bones-settle out and are shunted to storage tanks. Rich in calcium and magnesium, the dried brown powder "is a perfect balanced fertilizer," Appel says.
The remaining concentrated organic soup gushes into a second-stage reactor similar to the coke ovens used to refine oil into gasoline. "This technology is as old as the hills," says Appel, grinning broadly. The reactor heats the soup to about 900 degrees Fahrenheit to further break apart long molecular chains. Next, in vertical distillation columns, hot vapor flows up, condenses, and flows out from different levels: gases from the top of the column, light oils from the upper middle, heavier oils from the middle, water from the lower middle, and powdered carbon-used to manufacture tires, filters, and printer toners-from the bottom. "Gas is expensive to transport, so we use it on-site in the plant to heat the process," Appel says. The oil, minerals, and carbon are sold to the highest bidders.
Depending on the feedstock and the cooking and coking times, the process can be tweaked to make other specialty chemicals that may be even more profitable than oil. Turkey offal, for example, can be used to produce fatty acids for soap, tires, paints, and lubricants. Polyvinyl chloride, or PVC-the stuff of house siding, wallpapers, and plastic pipes-yields hydrochloric acid, a relatively benign and industrially valuable chemical used to make cleaners and solvents. "That's what's so great about making water a friend," says Appel. "The hydrogen in water combines with the chlorine in PVC to make it safe. If you burn PVC [in a municipal-waste incinerator], you get dioxin-very toxic."
The technicians here have spent three years feeding different kinds of waste into their machinery to formulate recipes. In a little trailer next to the plant, Appel picks up a handful of one-gallon plastic bags sent by a potential customer in Japan. The first is full of ground-up appliances, each piece no larger than a pea. "Put a computer and a refrigerator into a grinder, and that's what you get," he says, shaking the bag. "It's PVC, wood, fiberglass, metal, just a mess of different things. This process handles mixed waste beautifully." Next to the ground-up appliances is a plastic bucket of municipal sewage. Appel pops the lid and instantly regrets it. "Whew," he says. "That is nasty."
Experimentation revealed that different waste streams require different cooking and coking times and yield different finished products. "It's a two-step process, and you do more in step one or step two depending on what you are processing," Terry Adams says. "With the turkey guts, you do the lion's share in the first stage. With mixed plastics, most of the breakdown happens in the second stage." The oil-to-mineral ratios vary too. Plastic bottles, for example, yield copious amounts of oil, while tires yield more minerals and other solids. So far, says Adams, "nothing hazardous comes out from any feedstock we try."
"The only thing this process can't handle is nuclear waste," Appel says. "If it contains carbon, we can do it."
This Philadelphia pilot plant can handle only seven tons of waste a day, but 1,054 miles to the west, in Carthage, Missouri, about 100 yards from one of ConAgra Foods' massive Butterball Turkey plants, sits the company's first commercial-scale thermal depolymerization plant. The $20 million facility, scheduled to go online any day, is expected to digest more than 200 tons of turkey-processing waste every 24 hours.
The north side of Carthage smells like Thanksgiving all the time. At the Butterball plant, workers slaughter, pluck, parcook, and package 30,000 turkeys each workday, filling the air with the distinctive tang of boiling bird. A factory tour reveals the grisly realities of large-scale poultry processing. Inside, an endless chain of hanging carcasses clanks past knife-wielding laborers who slash away. Outside, a tanker truck idles, full to the top with fresh turkey blood. For many years, ConAgra Foods has trucked the plant's Waste -- feathers, organs, and other nonusable parts -- to a rendering facility where it was ground and dried to make animal feed, fertilizer, and other chemical products. But bovine spongiform encephalopathy, also known as mad cow disease, can spread among cattle from recycled feed, and although no similar disease has been found in poultry, regulators are becoming skittish about feeding animals to animals. In Europe the practice is illegal for all livestock. Since 1997, the United States has prohibited the feeding of most recycled animal waste to cattle. Ultimately, the specter of European-style mad-cow regulations may kick-start the acceptance of thermal depolymerization. "In Europe, there are mountains of bones piling up," says Alf Andreassen. "When recycling waste into feed stops in this country, it will change everything."
Because depolymerization takes apart materials at the molecular level, Appel says, it is "the perfect process for destroying pathogens." On a wet afternoon in Carthage, he smiles at the new Plant -- an artless assemblage of gray and dun-colored buildings -- as if it were his favorite child. "This plant will make 10 tons of gas per day, which will go back into the system to make heat to power the system," he says. "It will make 21,000 gallons of water, which will be clean enough to discharge into a municipal sewage system. Pathological vectors will be completely gone. It will make 11 tons of minerals and 600 barrels of oil, high-quality stuff, the same specs as a number two heating oil." He shakes his head almost as if he can't believe it. "It's amazing. The Environmental Protection Agency doesn't even consider us waste handlers. We are actually Manufacturers -- that's what our permit says. This process changes the whole industrial equation. Waste goes from a cost to a profit."
He watches as burly men in coveralls weld and grind the complex loops of piping. A group of 15 investors and corporate advisers, including Howard Buffett, son of billionaire investor Warren Buffett, stroll among the sparks and hissing torches, listening to a tour led by plant manager Don Sanders. A veteran of the refinery business, Sanders emphasizes that once the pressurized water is flashed off, "the process is similar to oil refining. The equipment, the procedures, the safety factors, the maintenance -- it's all proven technology."
And it will be profitable, promises Appel. "We've done so much testing in Philadelphia, we already know the costs," he says. "This is our first-out plant, and we estimate we'll make oil at $15 a barrel. In three to five years, we'll drop that to $10, the same as a medium-size oil exploration and production company. And it will get cheaper from there."
"We've got a lot of confidence in this," Buffett says. "I represent ConAgra's investment. We wouldn't be doing this if we didn't anticipate success." Buffett isn't alone. Appel has lined up federal grant money to help build demonstration plants to process chicken offal and manure in Alabama and crop residuals and grease in Nevada. Also in the works are plants to process turkey waste and manure in Colorado and pork and cheese waste in Italy. He says the first generation of depolymerization centers will be up and running in 2005. By then it should be clear whether the technology is as miraculous as its backers claim.
19 Sep 2005 @ 23:37 by jmarc : here's one
a little shorter. INVENTOR TURNS DEAD CATS INTO DIESEL Solyent Green anyone?
5 Oct 2005 @ 03:03 by : uh, yeah
revolutionizing toxic waste?
recycling dead cats?
aside from the implications of providing the dead cats, this usage of biological refuse to create energy of an immediately useful nature is highly fascinating.
Soylent green, aside, are there other down sides?
5 Oct 2005 @ 04:04 by : Well, :}
I haven't run across any, they could set these things up at all the old land fills and start minning them in hazard suits, a whole new job market, if you could handel being in a hazard suit, lol, then again, maybe they would do it the old fashon barberic way, and use criminals as slave labor, to do the minning. Just the moral issues of what gets tossed into it, lol. , spose, since some people are willing to get a chip implanted in them, I spose they could as well donate thier body for free burial, maybe the family gets a "My dead family member got recycled" certificate, and then it has the list of what his essances went to build, or lol, god forbid, my uncle's CO2, was put into sodas. lol.
5 Oct 2005 @ 10:13 by jmarc : my city's landfill
was closed a few years back. My friend took me up there when it was opened to meet afriend of his, who was running a generator for a multinational compamy. What they would do is bore holes into the parts that had already been filled and sink pipes into the holes which led to the shack where this huge noisy generator would use the gas to generate electricity which the company would sell back to the local electric company. The guy loved his job because his bosses were never there, but in some corporate building somewhere in another state, and all he had to do was sink a new hole every once in a while and keep his generator running. Me, I found the machine way too noisy, and those special smells were a little unbearable. He said that you get used to that. I did find the proccess fascinating though. They've since coveres the whole landfill with grass and it looks like any other verdant field, except for the pipes sticking up every couple hundred feet, because the gas is still getting pumped out of there.
5 Oct 2005 @ 17:01 by : Gas,
methane, thats all they get right now from old land fills, and they will usualy put a park over it. I cant see why thier set up was so noisy, other than they had to use some sort of huge vacuum pump, must have been a small or newer land fill if he had to add more intake lines, maybe most the organics arnt breaking down or there isnt much organics in that land fill. The land fill, that serves most of Los Angeles and surounding area, is 100s of layers thick now almost a mile deep basicly a trash lake in shape, when I was a kid we used to have to drive down into it, today you have to drive up to it. But they pull some serious methane from that land fill and supliment it into the local natural gas system, you can tell your getting the methane mix by the flame color on the stove. I remember seeing all sorts of TVs back then in the land fill, Id go with my dad, and while he would be unloading the truck, Id be takeing vacuum tubes from trashed TVs, lol. I can picture a minning operation in a methane atmosphere, this guys system could recycle all that mega waste, steel, copper, god theres like a million old water heaters buried there, just the brass alone if minned would be in the metric tons, lol.
21 Oct 2005 @ 14:24 by : Camper Van size
object in UK has been developed to convert package waste, wood chippings, logs, coal, straw, peat, animal litter, corn husks, cobs, coconut shells, cane stalks, sludge cake, and refuse derived fuel into GAS - 2.3 cubic metres of gas from 1 kilograme of wood, while 1.2 kilogrammes of wood will give 1 kilowatt hour of electricity and 1.5 kilowatts of heat. It can drive engines from 5 HP to more that 125o HP (Horse power). Looks good to me, gas from 2.5 kg of wood has the energy of 1 litre of petrol. However, I have not seen it around these parts or anywhere, and I think they do not get any publicity.
This is going on my web site with other ecotechno info soon. In India, when I went to collect the laundry from the Head Taxi man's house in the village nearby, one day his wife was sitting on the narrow verandah concrete floor (porch) she had put 3 little stones there and made a fire with a bit twig, on top was a round metal griddle, by the side of this she was rolling, on the floor, the flat breads, chipati, before putting on the griddle. They had a nice house, very clean and shining, the interior was visible thro the door when collecting the laundry. When she had finished, the stones could be put back in the flower bed in the garden, and the ashes swept up and put also on to the earth in the plant beds, and the chipati would be eaten. Nothing left but the griddle and bag of flour!!! and clean verandah. On another day on the verandah was a coloured sand Mandala, the philo of this apparently is that the sand when being poured thro the fingers reminds of impermenance!
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