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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Rice husk char has been used to filter gasifier effluent. Tests show about a 20% adsorption of contaminants of interest compared with activated carbon at 80%. It might be a useful in a cleaning process. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>The proliferation of gasifiers in South Asia has occurred mostly since about 2005. I last saw the energy in char used to incinerate scrubber water in a 100 kWe gasifier developed by Energy and Environmental Research Center (EERC at University of North Dakota) for grass seed screenings in 2006. I know that Ankur and others have tried this. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Rice husk gasifiers seem to have either a collection pond or a series of cooling and settling tanks with recirculation (with or without filter). For the ponds there have been constructed wetlands with water hyacinths and marigolds. For the tanks it would seem to make sense to continuously withdraw effluent for biological treatment. Since posting the Cambodia abstract I have seen research from India, China, and Germany in which various organisms have been used to break down gasifier effluent. The most promising seems to be a bioreactor which grows vegetables. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>The systems of interest would be the village scale (20-65 kWe), rural enterprise (rice mill) scale (100-200 kWe) or larger. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Rice husk is the most abundant raw material. The products should be biochar, water that is clean enough to reuse, and food, feed, or fiber. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Tom<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Gasification [mailto:gasification-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>linvent@aol.com<br><b>Sent:</b> Saturday, January 16, 2016 8:41 AM<br><b>To:</b> gasification@lists.bioenergylists.org; spaco@baldwin-telecom.net<br><b>Cc:</b> gasifiers@bioenergylists.org; biochar@yahoogroups.com<br><b>Subject:</b> Re: [Gasification] Characterization of waste water from biomass gasification equipment: A case-study from Cambodia<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span class=apple-style-span><span style='font-family:"Arial",sans-serif;color:black'>I have tried commercial activated charcoal and it doesn't work. It is far superior to bio char in adsorptivity, and the tarry water passes through it without removal. </span></span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Sincerely,<o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Leland T. "Tom" Taylor<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Thermogenics Inc. <o:p></o:p></span></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>-----Original Message-----<br>From: Paul Anderson <<a href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a>><br>To: Discussion of biomass pyrolysis and gasification <<a href="mailto:gasification@lists.bioenergylists.org">gasification@lists.bioenergylists.org</a>>; spaco <<a href="mailto:spaco@baldwin-telecom.net">spaco@baldwin-telecom.net</a>><br>Cc: gasifiers <<a href="mailto:gasifiers@bioenergylists.org">gasifiers@bioenergylists.org</a>>; biochar <<a href="mailto:biochar@yahoogroups.com">biochar@yahoogroups.com</a>><br>Sent: Sat, Jan 16, 2016 5:20 am<br>Subject: Re: [Gasification] Characterization of waste water from biomass gasification equipment: A case-study from Cambodia<o:p></o:p></p><div id="AOLMsgPart_2_1c22bd22-0fb7-4236-aa56-81b1cae68b51"><div><p class=MsoNormal>Dear Gasification Listserv and Biochar Listserv,<br><br>The excellent comment by James Joyce (below) did not reach the Gasification readers. It only went to the Biochar readers. Interesting for two reasons (overly simplified, but to make a point):<br><br>1. Gasification for power (engines) is what causes the problem of contaminated waste water, but those readers did not see the "solution offered". THEY are the people who could test and evaluate the solution.<br><br>2. Biochar production (for agriculture and carbon sequestration) has been proposed to make a filter-char that is to be burned, which is what biochar production is trying not to do. That is, char as filter for wastes made by trying to burn all of the biomass to ash.<br><br>Those of us who are subscribed to both lists will see the full discussion. Let's hope that this is a functional solution.<br><br>(Of course it is better if the nasty contents in the waste water were not created in the process of making the electro-mechanical power.)<br><br>To James Joyce, I say "Thanks."<br><br>Paul Anderson<br><br>James Joyce wrote:<br><br><o:p></o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal>Seems to me that the smallest foot print treatment would be to filter the water through char, gravity dewater and then dry the char to less than 30% moisture, then combust it at over 1000 deg C in a chamber that maintains a 2 second residence time for the gases released from the combustion. That will yield useful heat while destroying the recalcitrant hydrocarbons. In locations with weather that does not make solar or even bed drying viable, the process will generate more than enough heat to run a heated air drier.<o:p></o:p></p></div><div><p class=MsoNormal> After the past mess if dealt with, such a process would probably only need to be run for a day a week to treat scrubber water from storage tanks (i.e. never put out to lagoons or open storage where it is of great risk to the environment).<o:p></o:p></p></div><div><p class=MsoNormal> The equipment required to do that is far less complicated than the gasifiers themselves.<o:p></o:p></p></div><div><p class=MsoNormal>Regards, <o:p></o:p></p></div><div><p class=MsoNormal>James Posted by: James Joyce <a href="mailto:james@jamesjoyce.com.au"><james@jamesjoyce.com.au></a> <o:p></o:p></p></div></div></blockquote><p class=MsoNormal><br><br><o:p></o:p></p><pre>Doc / Dr TLUD / Prof. Paul S. Anderson, PhD Email: <a href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a> Skype: paultlud Phone: +1-309-452-7072 Website: <a href="http://www.drtlud.com" target="_blank">www.drtlud.com</a><o:p></o:p></pre><div><p class=MsoNormal>On 1/7/2016 10:45 AM, <a href="mailto:linvent@aol.com">linvent@aol.com</a> wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span class=aolmailapple-style-span><span style='font-family:"Arial",sans-serif;color:black'>Tom, </span></span><o:p></o:p></p></div><div><p class=MsoNormal><span class=aolmailapple-tab-span><span style='font-family:"Arial",sans-serif;color:black'> </span></span><span class=aolmailapple-style-span><span style='font-family:"Arial",sans-serif;color:black'>Thanks for the compliment and appreciation. There were hundreds of "pot" trials using a wide variety of treatments, extractions, etc. before the key process was accidentally stumbled on. Other processes have evolved and include the ability to take sea-water to potable with a fraction of the cost of distillation or RO. </span></span><o:p></o:p></p></div><div><p class=MsoNormal><span class=aolmailapple-tab-span><span style='font-family:"Arial",sans-serif;color:black'> </span></span><span class=aolmailapple-style-span><span style='font-family:"Arial",sans-serif;color:black'>Assumptions about the tar properties including specific gravity can be quite misleading. </span></span><o:p></o:p></p></div><div><p class=MsoNormal><span class=aolmailapple-tab-span><span style='font-family:"Arial",sans-serif;color:black'> </span></span><span class=aolmailapple-style-span><span style='font-family:"Arial",sans-serif;color:black'>One aspect of how to deal with the produced water from a gasifier is to give it the right type of compound definition and once that is reached, it makes it much easier to treat it. </span></span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Sincerely,<o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Leland T. "Tom" Taylor<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Thermogenics Inc. <o:p></o:p></span></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>_____________________________________________ Gasification mailing list to Send a Message to the list, use the email address <a href="mailto:Gasification@bioenergylists.org">Gasification@bioenergylists.org</a> to UNSUBSCRIBE or Change your List Settings use the web page <a href="http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org</a> for more Gasifiers, News and Information see our web site: <a href="http://gasifiers.bioenergylists.org/" target="_blank">http://gasifiers.bioenergylists.org/</a> <o:p></o:p></p></blockquote><p class=MsoNormal><o:p> </o:p></p></div></div><div id="AOLMsgPart_3_1c22bd22-0fb7-4236-aa56-81b1cae68b51"><pre style='background:white'><tt><span style='color:black'>_______________________________________________ Gasification mailing list to Send a Message to the list, use the email address <a href="mailto:Gasification@bioenergylists.org">Gasification@bioenergylists.org</a> to UNSUBSCRIBE or Change your List Settings use the web page <a href="http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org</a> for more Gasifiers, News and Information see our web site: <a href="http://gasifiers.bioenergylists.org/" target="_blank">http://gasifiers.bioenergylists.org/</a> </span></tt><span style='font-size:9.0pt;color:black'><o:p></o:p></span></pre></div></div></body></html>