Idea: Theoretical concept of a "upflow micro-aerobic peat-filter digester"

  • JKMakowka
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Re: Idea: Theoretical concept of a "upflow micro-aerobic peat-filter digester"

Some more background literature I found:

www.wetlands.org/LinkClick.aspx?fileticket=v4vnSMS3Nvs=
(general info on Methane emissions from peat soils, detail info on root impact)

www.gret-perg.ulaval.ca/uploads/tx_centr...drolProc_2009_03.pdf
(details on how one could vent methane from the bottom peat area and other related info)

www.env.uwaterloo.ca/u/jsprice/index.htm.../kellner_etal_05.pdf
(dynamics of gas bubbles in peat)

www.laurentbazinet.fsaa.ulaval.ca/upload..._Waddington_2006.pdf
(how the gas bubble can make peat float etc.)

www.benthamscience.com/open/togeogj/arti...OGEOGJ/67TOGEOGJ.pdf
(how floating peat forms naturally, e.g. this is basically what one would want to emulate)

Krischan Makowka
Microbiologist & emergency WASH specialist
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  • F H Mughal
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Re: Idea: Theoretical concept of a "upflow micro-aerobic peat-filter digester"

This is an interesting discussions. Students of water and wastewater engineering division will find this extremely helpful.

F H Mughal

F H Mughal (Mr.)
Karachi, Pakistan
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  • AquaVerde
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Re: Idea: Theoretical concept of a "upflow micro-aerobic peat-filter digester"

Dear Julius,
some surprising news to me on your original idea on peat-filters:
(sorry, not really a susana-topic anymore) maybe just good for a smile...
My colleague and I agreed not to purchase peat by a middlemen peat dealer as it is much too expensive. To my surprise my college (normally a sound and down to earth guy) installed recently a 35 cm aerobic up-flow peat filter 2 x 0,7m as a layer between pebbles stones as part of his circular system (sewage --->ABR+CW+sanitation sand filter+pool --> WC&WM). Nevertheless, very enthusiastic he spend more them 100 EURO for peat, even not waiting for my promised metric filter flow calculations.
All his design been only based on my past sketchy verbal explanations by phone, as he do not understand English of your US-web link. Unfortunately the water flow through peat-filter is up to now too high. Anyway we agreed to test at in- and outlet for P and N nutrient levels, I guess only to be disappointed and finally to swear on "American filter technologies"... :angry:

the peat "saga" will be continued B) .
All the Best
Detlef

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  • JKMakowka
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Re: Idea: Theoretical concept of a "upflow micro-aerobic peat-filter digester"

Ehh, "fast-shots" rarely do good for technology uptake and testing :dry:

35cm also seems rather thin, and I am not sure about the "structure" of dried peat one can buy easily. Maybe it just needs some time for a proper bio-layer to develop? This time of the year (with dropping temperatures in Germany) might however not be the best for that.

Last but not least: please don't mix up the (tested) aerobic intermittently loaded peat-filters with the (theoretical) microaerobic upflow design I proposed. The former really needs the time no waste-water is added and the water can drain so that the aerobic bacteria can do their work on the peat-matrix deposited solids.

Krischan Makowka
Microbiologist & emergency WASH specialist
Last Edit: 30 Sep 2013 21:31 by JKMakowka.
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  • AquaVerde
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Re: Idea: Theoretical concept of a "upflow micro-aerobic peat-filter digester"

Dear Colleagues,

Coming back to our old 2013 discussion, "how to get rid-off green-house-gases like Methane" after a simple AD-wwtp step. (AD= anaerobic digestion)

Methane (CH4) can not go in solution with Water (H2O), but after an AD it is still connected to effluent as very small bubbles which can not float up immediately. After "enough" time this very small bubbles connecting to each other and floating. "Normally" this Methane in effluent will separate to the atmosphere later within any aerobic wwtp step.

Maybe this Methane-rich effluent could still be "used" for an anaerobic DE-NITRIFICATION , as Methane could be the carbon-rich reducing agent in an anoxic or hypoxic environment. Probably a partly anaerobic horizontal CW or better an enclosed trickling "filter" as a growth substrate for anaerobic bacteria (bio-film) could be used as a de-nitrification step with the help by Methane.

Any sharing of experiences or R&D results related to "DE-NITRIFICATION with the help of Methane content in AD-effluent?" would be appreciated.

Thanks.
Best Regards,
Detlef

dear forum-moderators, maybe a new topic?
"DE-NITRIFICATION with the help of Methane content in AD-effluent?"

www.aqua-verde.de
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Last Edit: 17 May 2014 14:47 by AquaVerde.
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