Hallo all, yes, I tried it last summer. I chopped fresh, green Arundo into 2cm chips and soaked it in water. Joghurt and sour milk was added and the mash went down to ph 4 if I remember well. Before that i had prepared some starter from our septic tank, deep below a thick swimming layer. It develloped Methane all right, i could burn it. The soaked , probably hydrolized Arundo went into a plastic tank and was kept at around 28 °C for weeks. Ignitable methane develloped , but not to the extend expected. After the reaction ceased, I opened the tank and found the substrate virtually undigested, I mean in it's original form. Stem particles looked like stem particles and the rests of leaves were clearly distiguished. I did not quantify the yield, bur compared to othersubstartes it seemed poor to me, probably due to a high lignin %.
It has been like that for more than a year now, with temperature varying with the seasons. If anybody was interested, I could check again and find out what it looks like now. This crude experiment somehow discouraged me to carry on with AD of Arundo. Rolf Am Samstag, 24. September 2011 21:00:04 schrieb digestion- [email protected]: > Send Digestion mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > > http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergy > lists.org > > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Digestion digest..." > > > Today's Topics: > > 1. Re: Giant reed (arundo donax) digestion > (Jacopo Rosselli Del Turco) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 24 Sep 2011 07:15:10 +0000 > From: "Jacopo Rosselli Del Turco" <[email protected]> > To: "For Discussion of Anaerobic Digestion" > <[email protected]> > Subject: Re: [Digestion] Giant reed (arundo donax) digestion > Message-ID: > > <376381181-1316848571-cardhu_decombobulator_blackberry.rim.net-1104926706- > @b13.c7.bise7.blackberry> > > Content-Type: text/plain > > Thanks Les for your interesting observations. > I never thought of siloxanes but you're probably right. > Anyway I think it's a quite innovative biomass to use for digestion. > If anybody know something about its use in anaerobic digestion, please let > me know. Best regards! > > Jacopo Rosselli Del Turco > > -----Original Message----- > From: Les Gornall <[email protected]> > Sender: [email protected] > Date: Fri, 23 Sep 2011 18:19:05 > To: <[email protected]><[email protected]>; For Discussion of > AnaerobicDigestion<[email protected]> Reply-To: For > Discussion of Anaerobic Digestion > <[email protected]> > Cc: [email protected]<[email protected]> > Subject: Re: [Digestion] Giant reed (arundo donax) digestion > > Good question! The reed is unique in it's ability to lock silicon into its > stem tissues. That's why it is used for making oboe reeds. When digested > the silicone would most likely be expresses as siloxanes in the Biogas. > But I have not seen any data. Good research project for someone. I would > think phragmites Australis would be a better bet. You can grow the latter > in a reed bed on the final effluent. The resulting effluent would be > crystal clear and the productivity of the reed bed very high. Hmmmmm :-). > > > Les. Gornall > > > On 23 Sep 2011, at 18:51, "[email protected]<mailto:[email protected]>" > <[email protected]<mailto:[email protected]>> wrote: > > Good evening everybody, > I would like to know if you know about any biogas plant running on > codigestion of arundo donax (giant reed). If yes, in what percentage? What > are the other substrates? What kind of pretreatment is required? 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