title: Enhancing the biomethane potential of liquid dairy cow manure by addition of solid manure fractions.
abstract: OBJECTIVE
  To assess the effect of adding solid manure fractions on the biomethane potential (BMP) of liquid dairy cow manure and on the biokinetic parameters of the process.
  
  
  RESULTS
  The methanogenic potential of liquid dairy cow manure was strongly effected by adding a solid manure fraction. The 90/10 % (w/w) liquid/solid manure fraction mixture was the best substrate for CH4production. This substrate mixture improved by 50 % the final CH4production per g substrate and decreased the lag time by 220 % relative to the reference BMP test without the addition. Moreover, the addition of 20 % solid manure fraction adversely affected both the final CH4production and the maximum methane production rate, while increased the lag time by 400 % compared to the reference BMP test without addition.
  
  
  CONCLUSIONS
  Liquid dairy cow manure should be supplemented with no more than 10 % of solid manure fraction in order to improve the biomethane potential of this important agro-industrial residue.
authors: Department of Chemical Engineering and Environmental Technology, University of Valladolid, Valladolid, Spain.
authors: Israel
authors: I
authors: Díaz
authors: Department of Chemical Engineering and Environmental Technology, University of Valladolid, Valladolid, Spain.|Agrarian Engineering School, University of Valladolid-Soria Campus, C/Universidad s/n, 42004, Soria, Spain.
authors: Ivonne
authors: I
authors: Figueroa-González
authors: Agrarian Engineering School, University of Valladolid-Soria Campus, C/Universidad s/n, 42004, Soria, Spain.
authors: José Ángel
authors: JÁ
authors: Miguel
authors: Agrarian Engineering School, University of Valladolid-Soria Campus, C/Universidad s/n, 42004, Soria, Spain.
authors: Luis
authors: L
authors: Bonilla-Morte
authors: Department of Chemical Engineering and Environmental Technology, University of Valladolid, Valladolid, Spain. gquijano@iq.uva.es.|Agrarian Engineering School, University of Valladolid-Soria Campus, C/Universidad s/n, 42004, Soria, Spain. gquijano@iq.uva.es.
authors: Guillermo
authors: G
authors: Quijano
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D056804:Biofuels; D002417:Cattle; D008372:Manure; D008697:Methane / Q000096:biosynthesis*
chemical_list: D056804:Biofuels; D008372:Manure; D008697:Methane
keywords: Anaerobic digestion; Biogas; Biokinetic parameters; Biomethane potential; Dairy cow manure