4 ms·

The thing is, cogeneration (incinerators producing power) is a bit of a red herring; usually our waste doesn't have the calorific value to actually produce usab

by shash 6y ago

The thing is, cogeneration (incinerators producing power) is a bit of a red herring; usually our waste doesn't have the calorific value to actually produce usable power, so it's mixed with fuel, which is not exactly ideal. Also, unsegregated garbage, when burnt, will produce stuff like dioxins and furans which you don't want in the atmosphere. It's necessary for some types of waste (medical, for example), but it's not a power generation method.

TeMPOraL 6y ago
That doesn't feel right. Looking at the typical household production, I see (after separating out metals) mostly plastics, wood, paper, and various oils. This should all burn nicely and have high caloric value. Agreed on the toxic combustion products, though.
- shash 6y ago
  Not enough to make up the difference. Definitely not as much as coal or fossil fuel for example. Sure, they’ll burn, but not hot enough. Most domestic waste has a calorific value of not more than 16 MJ/Kg, and you need at least 15 MJ/Kg for ignition. Meaning, you need to add some other fuel to make it burn. Coal for comparison gives off 15-30 MJ/Kg, so it’s right on the edge there. Industrial waste is a different ball game, but then industrial waste has lots more toxic stuff. Source: http://www.igniss.com/calorific-value-waste http://www.igniss.com/calorific-value-waste
mschuster91 6y ago
> Also, unsegregated garbage, when burnt, will produce stuff like dioxins and furans which you don't want in the atmosphere. Modern garbage power plants have enormous exhaust filtration systems that take care of pretty much any toxic contaminant, no matter its form.
- shash 6y ago
  Assuming that the filtration systems are working perfectly, and are in order all the time. That’s not trivial...
  - mschuster91 6y ago
    In Germany the operators are bound by law to monitor their systems and fines are steep.
    - shash 6y ago
      Germany might be the only place where this tech is working as advertised. This stuff needs to work on a planetary level to make a difference. “Just solve corruption and this will work” is a kind of complex way around it...

by shash 6y ago

TeMPOraL 6y ago

That doesn't feel right. Looking at the typical household production, I see (after separating out metals) mostly plastics, wood, paper, and various oils. This should all burn nicely and have high caloric value. Agreed on the toxic combustion products, though.

shash 6y ago
Not enough to make up the difference. Definitely not as much as coal or fossil fuel for example. Sure, they’ll burn, but not hot enough. Most domestic waste has a calorific value of not more than 16 MJ/Kg, and you need at least 15 MJ/Kg for ignition. Meaning, you need to add some other fuel to make it burn. Coal for comparison gives off 15-30 MJ/Kg, so it’s right on the edge there. Industrial waste is a different ball game, but then industrial waste has lots more toxic stuff. Source: http://www.igniss.com/calorific-value-waste http://www.igniss.com/calorific-value-waste

mschuster91 6y ago

> Also, unsegregated garbage, when burnt, will produce stuff like dioxins and furans which you don't want in the atmosphere. Modern garbage power plants have enormous exhaust filtration systems that take care of pretty much any toxic contaminant, no matter its form.

shash 6y ago
Assuming that the filtration systems are working perfectly, and are in order all the time. That’s not trivial...
- mschuster91 6y ago
  In Germany the operators are bound by law to monitor their systems and fines are steep.
  - shash 6y ago
    Germany might be the only place where this tech is working as advertised. This stuff needs to work on a planetary level to make a difference. “Just solve corruption and this will work” is a kind of complex way around it...