[Gasification] Question from Philip Pedros - A working Sewage Sludge (Biosolids) to Energy plant in the UK

Sun Sep 23 02:39:05 CDT 2018

David,

My wife would say good on ya lad, now make it work for us all. 
(economically of course) (;-)

All the best,

Doug Williams.

(Fluidyne in retirement.)

On 23/09/18 19:28, David Pitt wrote:
> Gentlemen
>
> We have developed a full scale sludge to energy gasification plant in 
> conjunction with Yorkshire Water in the UK. The link below has a video 
> which describes the plant and shows the physical set up and 
> operational configuration which will give you a very good orientation 
> to its scale and level of development.
>
> www.youtube.com/watch?v=M2D3xQIpeiY 
> <http://www.youtube.com/watch?v=M2D3xQIpeiY>
>
> Be very happy to provide further information and of course be 
> delighted should anyone have a potential project application they 
> would like to discuss.
>
> Regards
>
> /*david*/
>
> //
>
> *David Pitt*
> *Director*
> *Enertecgreen Limited*
>
> *M: +44 7785 230 109
> O: +44 1753 910321
> www.enertecgreen.com <http://www.enertcgreen.com>*
> *Enertecgreen Ltd -Building 1 - Chalfont Park - Gerrards Cross - SL9 
> 0BG - UK*
>
>  Please don't print this e-mail unless you really need to
>
> This e-mail and any attachments are intended only for the above 
> addressee(s). The email and attachments may contain privileged 
> information. If you are not the addressee you must not copy, 
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>
>
> On 23 September 2018 at 00:15, Tom Miles <tmiles at trmiles.com 
> <mailto:tmiles at trmiles.com>> wrote:
>
>     Biosolds are typically gasified in combination with wood or
>     another bulky biomass. I think the City of Lebanon has
>     incorporated biosolids in their fuel mix of dry urban wood waste. 
>     Aries Energy purchased a fluidized bed gasifier developed for
>     biosolids but it is not intended for engine generation. In about
>     1985 City of Los Angeles ran three bubbling fluidized bed
>     gasifiers on dried digester gas. Heat was recovered in a  steam
>     boiler. The project lasted about five years. There have been many
>     small scale experiments using dried biosolids in gasifiers for
>     engines. I am not aware any upgrading the gas.
>
>     A few years go Anaergia Inc ran a Biogreen Energy pyrolyzer in
>     which the dried biosolids from an anaerobic digester were
>     carbonized.  The pyrolysis gas was put back into the digester
>     using a process patented by Washington State University. The
>     enriched digester gas was burned in an engine. A project to build
>     a larger system was announced for the City of Los Angeles was not
>     built.
>
>     Tom
>
>     *From:*Gasification <gasification-bounces at lists.bioenergylists.org
>     <mailto:gasification-bounces at lists.bioenergylists.org>> *On Behalf
>     Of *Pedros, Philip
>     *Sent:* Saturday, September 22, 2018 1:56 PM
>     *To:* Discussion of biomass pyrolysis and gasification
>     <gasification at lists.bioenergylists.org
>     <mailto:gasification at lists.bioenergylists.org>>
>     *Subject:* Re: [Gasification] Question from Philip Pedros
>
>     Mr. Williams
>
>     The question was from me and reflects my limited knowledge of
>     gasification, not the company’s.
>
>     I did not ask about digester gas being used to generate power, nor
>     am I aware of digester gas being referred to as syngas, as your
>     statement implies.  Apparently I should have stated that the feed
>     stock to the gasifier was thermally dried biosolids.
>
>     What I asked and what was answered is in point 3 below.  I am not
>     aware of syngas from a gasifier, with municipal biosolids as the
>     feedstock, directly fueling a CHP and was asking if it has been done.
>
>     Thank you,
>
>     Philip Pedros
>
>     Philip B. Pedros, Ph.D., P.E., BCEE
>
>     Technical Lead II
>
>     AECOM
>
>     250 Apollo Drive
>
>     Chelmsford, MA 01824
>
>     C: 781 258-8829
>
>     Philip.Pedros at aecom.com <mailto:Philip.Pedros at aecom.com>
>
>     *From:*Gasification
>     [mailto:gasification-bounces at lists.bioenergylists.org
>     <mailto:gasification-bounces at lists.bioenergylists.org>] *On Behalf
>     Of *Doug
>     *Sent:* Saturday, September 22, 2018 4:25 PM
>     *To:* gasification at lists.bioenergylists.org
>     <mailto:gasification at lists.bioenergylists.org>
>     *Subject:* Re: [Gasification] Question from Philip Pedros
>
>     Hi Philip,
>
>     Your question is really in several parts:
>
>     1. If you are referring to waste water containing sewage sludge,
>     then yes you will have the gas present.
>
>     2. Untreated Sewage gas (to clarify which syngas you are talking
>     about) cannot be fed directly into engines without at least a
>     scrubber between the gasometer storage and engine.
>
>     3. The gas calorific value of 120-150 Btu/scf is perfectly
>     adequate to run an engine and does not need boosting.
>
>     4. The technology you seek is already employed at many City Sewage
>     plants, generating power to run the plant.
>
>     5. I suggest you find working installations, there must be quite a
>     few in the USA.
>
>     Can I ask you why you or your organization think this is by your
>     question, unknown technology?
>
>     Regards,
>
>     Doug Williams.
>
>     On 23/09/18 07:49, tmiles at trmiles.com <mailto:tmiles at trmiles.com>
>     wrote:
>
>         Can untreated syngas generated from municipal wastewater
>         sludge be used directly to generate power?  It is my
>         understanding that the heating value of untreated syngas (120
>         – 150 But/scf), is too low to feed directly to engines and
>         that some type of post treatment to boost the heating value to
>         190 -200 is typically economically prohibitive.  Any
>         information on such post treatment and an case studies were
>         this has been done would be appreciated.
>
>         Thank you,
>
>         Philip Pedros
>
>         Philip B. Pedros, Ph.D., P.E., BCEE
>
>         Technical Lead II
>
>         AECOM
>
>         250 Apollo Drive
>
>         Chelmsford, MA 01824
>
>         C: 781 258-8829
>
>         Philip.Pedros at aecom.com <mailto:Philip.Pedros at aecom.com>
>
>
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