[USCC] Yardwaste Compost Weights

Fri May 29 09:58:59 CDT 2009

Here in MD we have found that there is quite a lot of variability. Any of the numbers proposed are reasonable, depending on the material. As mentioned, fine-screened material is denser than coarse. Moisture plays a significant role as does feedstock. an unexpected contributor to the density is the type of surface on which the composting occurs, and the amount of that surface scraped up during the operations. Hope this helps.

Don Lewis
Compost Program Coordinator
State Chemist Section
Maryland Department of Agriculture
50 Harry S. Truman Parkway
Annapolis, MD 21401

>>> Michael Nevin <mikepnevin at yahoo.ca> 5/28/2009 10:10 PM >>>
Hi - crunching your numbers, 1,400 lbs per cu yard or per 27 cu ft would come to appx 52 lbs per cu ft. The density of water is appx 62 lbs per cu ft. But water would have no air spaces or air ways so important to composting. So water is very compact unlike yard waste. When I fill an 18 cu ft cell, I get at most 500 to 600 lbs of a mixture of food scraps and shavings. One could get more weight by a very fine chopping to increase the packing.  But my guess is that your estimate is a bit high.
Mike Nevin Compost Facilitator at FoodShare, Toronto, Ontario
ph 416-363-6441 ext 231 compost at foodshare.net 
--- On Thu, 5/28/09, BfleuryWeCare at aol.com <BfleuryWeCare at aol.com> wrote:

From: BfleuryWeCare at aol.com <BfleuryWeCare at aol.com>
Subject: [USCC] Yardwaste Compost Weights
To: compost at mailman.cloudnet.com 
Received: Thursday, May 28, 2009, 2:53 PM

I need to find an average weight for yardwaste compost in the  Northeast.  
>From our experience, we would use a number of ~1,400 lbs/cy,  taking into 
account that the material will weigh more in the Spring and Winter  and less 
in Summer.  

Would  everyone agree with this number?  Remember, it's an average for the 
entire  year.

Thank you,

Brian C. Fleury

Senior Project  Manager

WeCare Organics, LLC
PO Box  785
Hillburn, NY 10931
(O) 845 / 753 / 2314
(F) 845 / 753 / 2349
(C)  315 / 374 / 5098
bfleurywecare at aol.com 
_www.wecareorganics.com_ (http://www.wecareorganics.com/) 
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Join us as the US Composting Council's 18th Annual Conference & Trade Show, January 24-27, 2010 at the Wyndham Orlando Resort, FL. The Largest Conference & Exhibition in North America for the Composting, Wood Waste, & Organics Recycling Industry. The Most Comprehensive Program of Training Courses, Educational & Technical Presentations, and Facility Tours & "Live" Equipment Demonstrations at the Disney/Reedy Creek Composting Facility. Conference Highlights & Program, Registration forms, Exhibitor Information and Sponsorship Opportunities available at the USCC website www.compostingcouncil.org or call the USCC at 631.737.4931
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(c) Copyright 2004 United States Composting Council - All rights reserved

Opinions expressed do not necessarily represent the USCC, the Foundation, or the Board of Directors.

Non-members of USCC are encouraged to join the Council through its website at: http://www.compostingcouncil.org/membership.cfm 

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