[USCC] Biosolids

[Edo McGowan]

Now this makes a lot of sense from several perspectives, not only the fuel issue, but by removing the solids ahead of digestion and burning them, not only are the pathogens and their genetic fragments destroyed, so are many of the emerging contaminants of concern. In addition, many of the solids that would go into solution because of bacterial digestion further within the treatment train are destroyed by pulling off the solids frst; the inability of current PTOWs to control solutions is well documented. Pulling out the solids ahead of digestion would reduce the pollutants going out with the effluent or recycled water. This thus reduces impacts on the environment. By sequestering the solids prior to digestion and burning them, this whole scenario of the inability to control solutions is greatly reduced and importantly the plant would need considerably less in the way of digestion systems. These results mean smaller less complicated plants, less staff and for plants now hemmed in by expensive real estate, thus a chance to expand production without needing more land.

Dr Edo McGowan

> From: CAVM at aol.com
> Date: Fri, 30 May 2008 19:54:06 -0400
> To: compost at mailman.cloudnet.com
> Subject: Re: [USCC] Biosolids
> 
> In view of the controversy and potential liability involving biosolids we  
> have cut back on the projects we are willing to become involved in with  them. 
> We are investigating high intensity anaerobic digestion to extract energy  from 
> biosolids as part of the waste water treatment process. 
>  
> But more interesting is the potential to short stop the wastewater  treatment 
> process and pull the biosolids from the liquid as soon as possible  without re
> gard to pathogen control or volume reduction.  The solids can be  dried by 
> surplus heat from a process which uses the biosolids as combustion  fuel. No 
> pathogens would be likely to survive 2500F combustion.  Odor  control, reduced 
> processing costs, disposal reduction and energy production are  all worthwhile 
> byproducts.
>  
> Regards,
>  
> Neal Van Milligen
> cavm at aol.com
> 
> 
> 
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