EcoRenovator  

Go Back   EcoRenovator > Improvements > Biofuels
Advanced Search
 


Blog Register 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Display Modes
Old 07-26-13, 04:38 PM   #1
Daox
Administrator
 
Daox's Avatar
 
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,364
Thanks: 1,011
Thanked 350 Times in 285 Posts
Default Kroger's anaerobic digester, 13 million kWh/year

I found this link over on Builditsolar. Really interesting article and some pretty great power output here! It doesn't mention cost, but ROI seems pretty good.

A powerful use for spoiled food - Los Angeles Times

Quote:
Several chest-high trash bins containing a feast of limp waffles, wilting flowers, bruised mangoes and plastic-wrapped steak sat in an airy space laced with piping. Stores send food unable to be donated or sold to the facility, where it is dumped into a massive grinder cardboard and plastic packaging included.

After being pulverized, the mass is sent to a pulping machine, which filters out inorganic materials such as glass and metal and mixes in hot wastewater from a nearby dairy creamery to create a sludgy substance.

...

From there, the mulch is piped into a 250,000-gallon staging tank before being steadily fed into a 2-million-gallon silo. The contraption essentially functions as a multi-story stomach.

Inside, devoid of oxygen, bacteria munch away on the liquid refuse, naturally converting it into methane gas. The gas, which floats to the top of the tank, is siphoned out to power three on-site turbine engines.

The 13 million kilowatt-hours of electricity they produce per year could power more than 2,000 California homes over the period, according to Kroger.

__________________
Current project -
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
&
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Daox is offline   Reply With Quote
The Following 2 Users Say Thank You to Daox For This Useful Post:
NeilBlanchard (07-26-13), Piwoslaw (07-27-13)
Old 07-26-13, 11:22 PM   #2
NeilBlanchard
Journeyman EcoRenovator
 
NeilBlanchard's Avatar
 
Join Date: Dec 2009
Location: Maynard, MA Eaarth
Posts: 383
Thanks: 78
Thanked 38 Times in 32 Posts
Default

When the slurry is finished producing more methane, it will make a high quality fertilizer, with fixed nitrogen that won't run off in the first rain fall.
NeilBlanchard is offline   Reply With Quote
Old 07-29-13, 08:38 AM   #3
Daox
Administrator
 
Daox's Avatar
 
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,364
Thanks: 1,011
Thanked 350 Times in 285 Posts
Default

Yep. The article mentions that they do that.

__________________
Current project -
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
&
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Daox is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 12:37 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design