[USCC] Biosolids

Fri May 4 22:46:52 CDT 2007

Does anyone have a set of "dos and don'ts" when it comes to the composting of  pharma waste (organic/inorganic waste  and sludge)
 Any information would be greatly appreciated, many thanks. 

 Jaikumar

-----Original Message-----
From: epsteinee at comcast.net [mailto:epsteinee at comcast.net]
Sent: 03/05/2007 5:52 AM
To: Compost Discussion List
Subject: Re: [USCC] Biosolids

Bill,

The composting of biosolids requires an amendment. The C/N ratio is around 10:1. The amount of bulking agent depends on the percent solids as a result of dewatering. The lower tjhe solids content the greater the amount of bulking agent. For example at solids content of 18-20% the volumetric ratio is usually 3:1. If the solids content is 23% then the ratio drops to close to 2:1.  Another factor is the technology being used. With ASP systems the bulking agent is important for both porosity and moisture control. This is because there is no turning and the bulking agent provides the porosity for the air. The moisture content of the mix of biosolids and bulking agent should not exceed 60% moisture. With the windrow method I also like to see around 60% moisture content for the mix. Moisture control could be more difficult. However porosity is less critical but still important since you rely on convective air flow.

It is important to meet the USEPA 503 regulations (latest revision 2003) for both pathogens and vector attraction.

I would treat animal mortality the same manner as biosolids since the material contains pathogens. You may need to do a materials balance with poultry or other animals or their waste. This would provide you with the amount of bulking agent needed.

Eliot
--
Eliot Epstein 
19 Preston Place 
North Easton, MA 02356 
Tel: 508-238-1931 
Cell: 781-603-7151 
E-mail: epsteinee at comcast.net

-------------- Original message -------------- 
From: "Carney, Jr., William A." <Bcarney at agcenter.lsu.edu> 

> Participate in the Annual International Compost Awareness Week May 6, 2007 to 
> May 12, 2007 
> This year's theme is "The Possibilities are Endless ... Compost!" 
> For more info, go to: http://compostingcouncil.org/section.cfm?id=25 or Call the 
> USCC at 631-737-4931 
> ______________________________________________________________________________ 
> Does anyone have a set of "dos and don'ts" when it comes to the 
> composting of Biosolids and/or Catastrophic Poultry Mortality, the 
> process as well as facility type and site selection. 
> Any information would be greatly appreciated, many thanks. 
> 
> Bill Carney, Ph.D. 
> Associate Professor and Head 
> W. A. Callegari Environmental Center 
> Louisiana State University AgCenter 
> P.O. Box 25100 
> Baton Rouge, LA 70894-5100 
> Office: 225-578-6998 
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