Compost Volatiles - Revision history

Rasmus at 14:40, 29 August 2016

2016-08-29T14:40:17Z

← Older revision		Revision as of 14:40, 29 August 2016
Line 26:		Line 26:
	==Links==		==Links==
	* http://www.sciencedirect.com/science/article/pii/S135223109800260X		* http://www.sciencedirect.com/science/article/pii/S135223109800260X
			* http://www.sciencedirect.com/science/article/pii/S0043135404000028

	[[Category:Food and Agriculture]]		[[Category:Food and Agriculture]]
	[[Category:Biofuel]]		[[Category:Biofuel]]

Rasmus at 14:26, 29 August 2016

2016-08-29T14:26:41Z

← Older revision		Revision as of 14:26, 29 August 2016
Line 18:		Line 18:

	==Possible Approach==		==Possible Approach==
	After capture of the ~~compost exhaust~~, it ~~should~~ be cooled down for condensation. ~~Many~~ of the ~~VOCs of interest will have a~~ condensation ~~point above or not far from 0 degrees C. What~~ remains in the gaseous phase ~~after that~~ will be mostly CO2, N2, and O2 (discard). The watery solution can then be heated again (evaporation) and cooled again (condensation). Further steps will be necessary depending on what you want to isolate.		To accelerate composting and increase the amount of off-gases, the compost could be aerated. After capture of the off-gases, it needs to be cooled down for condensation. A [https://en.wikipedia.org/wiki/Heat_exchanger heat exchanger] can recapture most of the temperature to make the process more efficient. After condensation, what remains in the gaseous phase will be mostly CO2, N2, and O2 (discard these). The watery solution can then be heated again (for evaporation) and cooled again (for condensation). Further steps will be necessary, depending on what you want to isolate.

	==Related Pages==		==Related Pages==

Rasmus at 00:14, 29 August 2016

2016-08-29T00:14:08Z

← Older revision		Revision as of 00:14, 29 August 2016
Line 16:		Line 16:
	* ketones		* ketones
	* toluene, ethylbenzene, 1,4-dichlorobenzene, p-isopropyl toluene, and naphthalene		* toluene, ethylbenzene, 1,4-dichlorobenzene, p-isopropyl toluene, and naphthalene

			==Possible Approach==
			After capture of the compost exhaust, it should be cooled down for condensation. Many of the VOCs of interest will have a condensation point above or not far from 0 degrees C. What remains in the gaseous phase after that will be mostly CO2, N2, and O2 (discard). The watery solution can then be heated again (evaporation) and cooled again (condensation). Further steps will be necessary depending on what you want to isolate.

	==Related Pages==		==Related Pages==

Rasmus: /* Some Chemical Components */

2016-08-28T23:45:44Z

Some Chemical Components

← Older revision		Revision as of 23:45, 28 August 2016
Line 11:		Line 11:
	* esters		* esters
	* sulphur compounds		* sulphur compounds
	* ethers.		* ethers
	* alkylated benzenes		* alkylated benzenes
	* alkanes		* alkanes

Rasmus: Created page with "A large compost pile can spontaneously combust if not properly managed. File:Compost Site Germany.JPG|640px|thumb|right|..."

2016-08-28T23:33:00Z

New page

[[File:Thermophilic Compost.jpg|640px|thumb|right|A large compost pile can spontaneously combust if not properly managed.]]

[[File:Compost Site Germany.JPG|640px|thumb|right|A community-level composting plant in a rural area in Germany.]]

Composting releases volatile organic compounds (VOCs). Some of them may be interesting as biofuels or chemicals. The gaseous emissions would have to be condensed first and then refined (separated). The spectrum of VOCs differs by type of composting, feedstock, aeration, etc.

==Some Chemical Components==
*alcohols (e.g. [[ethanol]])
* carbonyl compounds
* terpenes
* esters
* sulphur compounds
* ethers.
* alkylated benzenes
* alkanes
* ketones
* toluene, ethylbenzene, 1,4-dichlorobenzene, p-isopropyl toluene, and naphthalene

==Related Pages==
* [[Mycodiesel]]
* [[Thermophilic compost]]

==Links==
* http://www.sciencedirect.com/science/article/pii/S135223109800260X

[[Category:Food and Agriculture]]
[[Category:Biofuel]]