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Many cultures burn dung as a primary fuel source. First world cities have tremendous supplies of dung, funneled to a central location, yet there has been no systematic effort to exploit the fuel value of this. Enter the Dungboiler system.
In this system, waste solids in the water stream are screened
and conentrated, then shunted to the Dungboiler. There they are bubbled with oxygen and ozone. This oxidizes the wastes, giving off heat - essentially burning them. The water becomes very hot, accelerating the reaction and the heat produced can be controlled by the oxygen / ozone delivered. The heated water turns a turbine, and the energy produced runs the rest of the water treatment plant, with extra energy going back to the grid.
After maximum energy is extracted, boiled dung is returned to the waste stream.
Advantages:
1. The Dungboiler system operates wet. Wastes do not need to be dried.
2. Oxidation in a water environment means most of the CO2 emissions remain safely dissolved in the water, not spewed into the sky. Likewise with particulates, etc.
3. The high temperatures generated sterilize the wastes.
4. Current microbial methods of sewage treatment can be damaged by pesticide, motor oil, and other non-waste items which get in the wastewater stream. This stuff is all just fuel for the Dungboiler.
5. Effluent from the Dungboiler can go on to be treated just as wastes are currently. The Dungboiler can be added in line with current systems, to extract energy before treating. It is compatable with existing wastewater treatment.
Sewage waste to energy
http://www.hindu.co...002053000090200.htm
[daseva, Apr 14 2005]
more shit fuel
http://feeds.bignew...id=0911c350996925b6
[daseva, Apr 14 2005]
Fuel cell powered by... poop!
http://www.msnbc.msn.com/id/5335635
[daseva, Apr 14 2005]
[link]
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So this is a kind of chemical digester? I don't know, but would imagine that the biological methods would be more efficient, wouldn't they? |
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[bungston], is it ok if we build this upwind of your place ? |
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You can put it in my bedroom! The Dungboiler is better at energy extraction because it runs hotter than biological digesters can tolerate. |
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As I think about it, some of the CO2 might bubble out of solution. Maybe it better not be in my bedroom. |
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I think this idea name would make a great off-Broadway musical. |
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Wouldn't it use more energy to boil the water than to recieve energy from it? Why not use something less dense, or that heats up more. Oil? Maybe? Or let's pressure cook it! Use some sort of gas, pack it into the burning chamber, pressureize it into a liquid, and then burn it! I don't know of any gases that might do this, and I know it's dangerous and difficult to press something down that hard, but hey, I'll chance it! |
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*sparks another idea* Why not compact all the waste into a tight block? Might burn more efficiently. Aww, I don't know what I'm saying... |
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Producing the oxygen/ozone to bubble through the dung would surely cost more energy than you would be able to extract. Why not just burn dung in a regular boiler, ignited with a gas/oil flame? The fact that it won't be dry isn't a problem, as most industrial woodwaste and recovery boilers seem to handle wet fuel all right. "Modern" low opacity boilers are probably just as environmentally friendly as this idea. |
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This might still work with plain bubbled air. |
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1) Uncountable anaerobic reactors are working in entire world to produce biogas from slurry & use left out material as fertilizer. |
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2) What would be the cost of oxygen/ ozone to run the system ? |
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3) Please throw some light on the reaction that would cause tremendous rise in water temperature ? |
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4) Are you aiming at putting turbine operating with flash steam generated from pressurized hot water ? |
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1. Biogas. Good! But I want my energy _now_. |
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2. Cost of oxygen / ozone: This would need to be cheap enough to be generated by a small fraction of the energy released from the waste. A high voltage low current source could be set up and air used for the bubbler passed over it. Essentially one of those ionic air cleaners, which generate loads of ozone. However, the ozone is probably superfluous and this would run OK on plain air once it was hot. |
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3: Reaction: CxH2x + O2 = CO2 + H20 + heat. |
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4. Flash steam turbine - ok. I had not thought about this detail. |
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You could call it the "Bungston Burner" or even the "Dungston Burner" (laughing at own joke...pitiful) |
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