title: Mono-fermentation of chicken manure: ammonia inhibition and recirculation of the digestate.
abstract: The effects of ammonia concentration on the performance and stability of mono-fermentation of chicken manure were investigated in a lab-scale continuous stirred tank reactor at 40 °C. Technical stripping was performed to remove ammonia from the liquid fraction of digestate, and the entire product was recycled to the fermenter to control ammonia concentration in the fermenter. Organic loading rate (OLR) of 5.3 gVS/(L d) was achieved with an average free ammonia nitrogen (FAN) concentration of 0.77 g/L and a specific gas yield of 0.39 L/gVS. When OLR was increased to 6.0 gVS/(L d), stable operation could be obtained with an average FAN concentration of 0.86 g/L and a specific gas yield of 0.27 L/gVS. Mono-fermentation of chicken manure was successfully carried out at high ammonia concentrations. Controlled recirculation of treated liquid fraction of digestate could be a solution in large-scale application for both: to avoid ammonia inhibition and minimize digestate.
authors.affiliation: Institute of New Energy, China University of Petroleum (Beijing), Beijing 102249, China; Department Biochemical Conversion, Deutsches Biomasseforschungszentrum gemeinnützige GmbH, 04347 Leipzig, Germany.
authors.forename: Hong
authors.initials: H
authors.lastname: Nie
authors.affiliation: Department Biochemical Conversion, Deutsches Biomasseforschungszentrum gemeinnützige GmbH, 04347 Leipzig, Germany. Electronic address: Fabian.Jacobi@dbfz.de.
authors.forename: H Fabian
authors.initials: HF
authors.lastname: Jacobi
authors.affiliation: Department Biochemical Conversion, Deutsches Biomasseforschungszentrum gemeinnützige GmbH, 04347 Leipzig, Germany.
authors.forename: Katrin
authors.initials: K
authors.lastname: Strach
authors.affiliation: Institute of New Energy, China University of Petroleum (Beijing), Beijing 102249, China.
authors.forename: Chunming
authors.initials: C
authors.lastname: Xu
authors.affiliation: Institute of New Energy, China University of Petroleum (Beijing), Beijing 102249, China.
authors.forename: Hongjun
authors.initials: H
authors.lastname: Zhou
authors.affiliation: Department Biochemical Conversion, Deutsches Biomasseforschungszentrum gemeinnützige GmbH, 04347 Leipzig, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Liebetrau
mesh_terms: D000641:Ammonia / Q000494:pharmacology*; D000818:Animals; D061249:Batch Cell Culture Techniques; D019149:Bioreactors; D002645:Chickens; D005232:Fatty Acids, Volatile / Q000032:analysis; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D008372:Manure / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis; D013997:Time Factors; D014835:Volatilization; D014866:Waste Products
chemical_list: D005232:Fatty Acids, Volatile; D008372:Manure; D014866:Waste Products; D000641:Ammonia; D009584:Nitrogen
keywords: Ammonia inhibition; Ammonia stripping; Chicken manure; Fermentation