Investigation into the effect of high concentratio

Investigation into the effect of high concentrations of volatile fatty acidsin anaerobic digestion on methanogenic communitiesInvestigationintotheeffectofhighconcentrationsofvolatilefattyacidsinanaerobicdigestiononmethanogeniccommunitiesIngridH.Franke-Whittlea,⇑,AndreasWaltera,ChristianEbnerb,HeribertInsamaaInstitutfürMikrobiologie,UniversitätInnsbruck,Technikerstraße25,6020Innsbruck,AustriabAbwasserverbandZirlundUmgebung,Meilbrunnen5,6170Zirl,AustriaarticleinfoArticlehistory:Received25February2014Accepted29July2014Availableonline24August2014Keywords:Volatilefattyacids(VFAs)ANAEROCHIPReal-timePCRMethanogensAnaerobicdigestion(AD)abstractAstudywasconductedtodeterminewhetherdifferencesinthelevelsofvolatilefattyacids(VFAs)inanaerobicdigesterplantscouldresultinvariationsintheindigenousmethanogeniccommunities.Twodigesters(oneoperatedundermesophilicconditions,theotherunderthermophilicconditions)weremonitored,andsampledatpointswhereVFAlevelswerehigh,aswellaswhenVFAlevelswerelow.Physicalandchem