Re: [Biofuel] Fwd: Uses of glycerin
1. This is what I have, but I will look into further for you. New Waste Stream Specific Information 1. A corn and soybean oil biodiesel manufacturing company produces a byproduct, glycerine. The glycerine is agricultural grade and looks similar to thin maple syrup. 2. Notable Constituents The notable constituents are BOD 100,000 mg/l, COD 1,760,000 mg/l, and passed a solubility test. All constituents passed the established Waste Acceptance Criteria. So it's a commerial operation, and it sounds like they're separating the glycerine from the rest of the by-product and refining it. 2. Hi Keith, Here's what I found out. The actual BOD was closer to one million that is relflect in the COD value. Is that just the glycerin? The by-product of making biodiesel is a cocktail of glycerin, soaps (from free fatty acids), excess methanol (which can be recovered), and the lye catalyst (NaOH or KPH). There is often more soap than glycerin, does the process handle the soap too, as well as the high pH? It's my understanding that the typical process starts with various oils and at different concentrations, so they have to shock the reaction since they don't know what they are starting with necessarily. This technique of over treating the reaction requires more washing the product, which results in more byproduct wastewater to manage (lye, methanol, etc.). The customer we are working with explained that their system is fairly unique in the industry because they have chosen to perform precision chemistry because they pretreat the oils before beginning the process. By knowing their oils are consistent with each batch because of the pretreatment, thus their process is considered by them to be more streamlined. They also generate minimal byproduct wastewater to manage, and it's fairly pure in that they generally don't produce soap, have minimal catalyst present, and minimal generation of methanol. As for pH, since the chemistry is the anaerobic digester is healthy, a high pH wasn't much of a concern. If your Volatile acids:alkalinity ratio is low this acts as a buffer. Our main concern was foaming with the introduction of glycerin, and we did see an increase hence the slow feed rate to the digester. Hope that helps. Anyone know what this means? I think I do know, somewhere or other, but it doesn't come to mind. The actual BOD was closer to one million that is relflect in the COD value. Thanks! Keith Forwarded message from a Journey to Forever reader. Best wishes Keith Hello, I work at a wastewater treatment plant and I was doing a search on glycerin and biofuels and came across your website. It's has good information thanks. Here's another use of glycerin: Our treatment is accepting the glycerin from a biofuel producer, we feed it to our digesters, slowly very slowly. The addition of glycerin has dramatically increased our gas production, that we run all three engines that produce electricity for our plant and occasionally need to flare off the excess methane (we have 4 flares). This might be of interest to your readers that use digestion for electricity. ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo.cgi/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
RE: [Biofuel] Fwd: Uses of glycerin
Hola Francisco. Methane generating bacteria are sensitive to aerobic conditions and generally they do not produce methane in the presence of oxygen of the air but if the fermenter is like a pool deep enough and not agitated, it could happen that the bottom is anaerobic and in the surface is thin aerobic film. The feed rate on any fermenter will depend on many variables like size of the fermenter, temperature, pH, type of bacterial species, design and management of the fermenter (plug flow, well mixed and power used per unit of volume, re-use or not of bacterial mass, back flow of sediment if any or liquids), physical state and chemical structure of the material to feed the fementer, solubility, size of the material, carbon to nitrogen and phosphorus ratio, etc, etc. Regards. Juan -Mensaje original- De: francisco j burgos [SMTP:[EMAIL PROTECTED] Enviado el: Domingo 27 de Febrero de 2005 9:34 PM Para: [EMAIL PROTECTED]; [EMAIL PROTECTED] Asunto: Re: [Biofuel] Fwd: Uses of glycerin Dear pals: the digester where glycerin is feed is it an aerobious(works in presence of air) digester or an anaerobious(works without air presence) digester?. What is the glycerin feed rate to the digester?. Thanks in advance, Francisco - Original Message - From: Keith Addison [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, February 27, 2005 6:02 PM Subject: [Biofuel] Fwd: Uses of glycerin Forwarded message from a Journey to Forever reader. Best wishes Keith Hello, I work at a wastewater treatment plant and I was doing a search on glycerin and biofuels and came across your website. It's has good information thanks. Here's another use of glycerin: Our treatment is accepting the glycerin from a biofuel producer, we feed it to our digesters, slowly very slowly. The addition of glycerin has dramatically increased our gas production, that we run all three engines that produce electricity for our plant and occasionally need to flare off the excess methane (we have 4 flares). This might be of interest to your readers that use digestion for electricity. ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo.cgi/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
Re: [Biofuel] Fwd: Uses of glycerin
the digester where glycerin is feed is it an aerobious(works in presence of air) digester or an anaerobious(works without air presence) digester?. What is the glycerin feed rate to the digester?. Thanks in advance, Francisco - Original Message - From: Keith Addison [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, February 27, 2005 6:02 PM Subject: [Biofuel] Fwd: Uses of glycerin Forwarded message from a Journey to Forever reader. Best wishes Keith Hello, I work at a wastewater treatment plant and I was doing a search on glycerin and biofuels and came across your website. It's has good information thanks. Here's another use of glycerin: Our treatment is accepting the glycerin from a biofuel producer, we feed it to our digesters, slowly very slowly. The addition of glycerin has dramatically increased our gas production, that we run all three engines that produce electricity for our plant and occasionally need to flare off the excess methane (we have 4 flares). This might be of interest to your readers that use digestion for electricity. ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo.cgi/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
Re: [Biofuel] Fwd: Uses of glycerin
Pan wrote The addition of glycerin has dramatically increased our gas production, that we run all three engines that produce electricity for our plant and occasionally need to flare off the excess methane (we have 4 flares(end quote) Pan - Can you lead me to some weblinks for the technical briefs as to why glycerin has dramatically increased (y)our gas production... I will also search the JTF website. Phillip Wolfe --- francisco j burgos [EMAIL PROTECTED] wrote: Dear pals: the digester where glycerin is feed is it an aerobious(works in presence of air) digester or an anaerobious(works without air presence) digester?. What is the glycerin feed rate to the digester?. Thanks in advance, Francisco - Original Message - From: Keith Addison [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, February 27, 2005 6:02 PM Subject: [Biofuel] Fwd: Uses of glycerin Forwarded message from a Journey to Forever reader. Best wishes Keith Hello, I work at a wastewater treatment plant and I was doing a search on glycerin and biofuels and came across your website. It's has good information thanks. Here's another use of glycerin: Our treatment is accepting the glycerin from a biofuel producer, we feed it to our digesters, slowly very slowly. The addition of glycerin has dramatically increased our gas production, that we run all three engines that produce electricity for our plant and occasionally need to flare off the excess methane (we have 4 flares). This might be of interest to your readers that use digestion for electricity. ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo.cgi/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/ ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo.cgi/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/ __ Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. http://promotions.yahoo.com/new_mail ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo.cgi/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
Re: [Biofuel] Fwd: Uses of glycerin
increased our gas production, that we run all three engines that produce electricity for our plant and occasionally need to flare off the excess methane (we have 4 flares(end quote) Pan - Can you lead me to some weblinks for the technical briefs as to why glycerin has dramatically increased (y)our gas production... I will also search the JTF website. Phillip Wolfe No, Phillip, Pan didn't write that, I posted it as a forward, it was feedback sent to me by a visitor to the Journey to Forever website: Forwarded message from a Journey to Forever reader. You should re-read the whole thread I think. http://wwia.org/pipermail/biofuel/Week-of-Mon-20050221/006366.html http://wwia.org/pipermail/biofuel/Week-of-Mon-20050228/thread.html#6368 There is more information about glycerin and biogas in the list archives though: http://infoarchive.net/sgroup/biofuel/ Information Archive at NNYTech Best wishes Keith --- francisco j burgos [EMAIL PROTECTED] wrote: Dear pals: the digester where glycerin is feed is it an aerobious(works in presence of air) digester or an anaerobious(works without air presence) digester?. What is the glycerin feed rate to the digester?. Thanks in advance, Francisco - Original Message - From: Keith Addison [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, February 27, 2005 6:02 PM Subject: [Biofuel] Fwd: Uses of glycerin Forwarded message from a Journey to Forever reader. Best wishes Keith Hello, I work at a wastewater treatment plant and I was doing a search on glycerin and biofuels and came across your website. It's has good information thanks. Here's another use of glycerin: Our treatment is accepting the glycerin from a biofuel producer, we feed it to our digesters, slowly very slowly. The addition of glycerin has dramatically increased our gas production, that we run all three engines that produce electricity for our plant and occasionally need to flare off the excess methane (we have 4 flares). This might be of interest to your readers that use digestion for electricity. ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo.cgi/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
[Biofuel] Fwd: Uses of glycerin
Best wishes Keith Hello, I work at a wastewater treatment plant and I was doing a search on glycerin and biofuels and came across your website. It's has good information thanks. Here's another use of glycerin: Our treatment is accepting the glycerin from a biofuel producer, we feed it to our digesters, slowly very slowly. The addition of glycerin has dramatically increased our gas production, that we run all three engines that produce electricity for our plant and occasionally need to flare off the excess methane (we have 4 flares). This might be of interest to your readers that use digestion for electricity. ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo.cgi/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
