[Gasification] Characterization of waste water from biomass gasification equipment: A case-study from Cambodia

[linvent at aol.com]

 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.?
Sincerely,
Leland T. "Tom" Taylor
Thermogenics Inc.?



-----Original Message-----
From: Paul Anderson <psanders at ilstu.edu>
To: Discussion of biomass pyrolysis and gasification <gasification at lists.bioenergylists.org>; spaco <spaco at baldwin-telecom.net>
Cc: gasifiers <gasifiers at bioenergylists.org>; biochar <biochar at yahoogroups.com>
Sent: Sat, Jan 16, 2016 5:20 am
Subject: Re: [Gasification] Characterization of waste water from biomass gasification equipment: A case-study from Cambodia

                     Dear Gasification Listserv and Biochar Listserv,
     
     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):
     
     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.
     
     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.
     
     Those of us who are subscribed to both lists will see the full     discussion.?? Let's hope that this is a functional solution.
     
     (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.)
     
     To James Joyce, I say "Thanks."
     
     Paul Anderson
     
     James Joyce wrote:
                     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.
         ?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).
         ?The equipment required to do that           is far less complicated than the gasifiers themselves.
         Regards,?         
         James????????????????????????????? Posted           by: James Joyce <james at jamesjoyce.com.au> 
       
          
     Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD Email:  psanders at ilstu.edu Skype:   paultlud    Phone: +1-309-452-7072 Website:  www.drtlud.com     On 1/7/2016 10:45 AM, linvent at aol.com       wrote:
     
            
        Tom,?
       	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.?
       	Assumptions             about the tar properties including specific gravity can be             quite misleading.?
       	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.?
       Sincerely,
         Leland T. "Tom" Taylor
         Thermogenics Inc.?
       
       
       
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