title: Improvement through low cost biofilm carrier in anaerobic tubular digestion in cold climate regions.
abstract: The aim of this research is to evaluate the increase of biogas production with low cost tubular digesters in cold climates using PET rings inside the reactor. Two similar digesters have been operated and monitored in cold weather conditions and have been fed with cow manure. Digester 1 was filled with PET - rings as a biofilm carrier, Digester 2 was kept as a reference. Through the PET - rings the functional surface could be increased by a factor 4.2. The results show that 44% more biogas per Kg SV has been produced with the biofilm carrier in use (0.33 m(3)/kg SV) (reference digester -0.23 m(3)/kg SV), at an organic load rate of 0.26 kg SV/m(3)/d. The thermal performance shows that with an adaptation of the low cost tubular digester the slurry temperature can be raised up to 16.6°C (average) by surrounding temperature of 6.1°C (average) without using any active heating system.
authors: Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), Building Energy and Environment Group, Edifici GAIA (TR14), C/Rambla Sant Nebridi 22, 08222 Terrassa, Barcelona, Spain(1). Electronic address: jaimemarti@cimne.upc.edu.
authors: J
authors: J
authors: Martí-Herrero
authors: IIDEPROQ, UMSA, Plaza del Obelisco 1175, La Paz, Bolivia.
authors: R
authors: R
authors: Alvarez
authors: IIDEPROQ, UMSA, Plaza del Obelisco 1175, La Paz, Bolivia.
authors: M R
authors: MR
authors: Rojas
authors: Energising Development Bolivia (EnDev-Bolivia/GIZ), Calle 12 de Calacoto, 7978, La Paz, Bolivia.
authors: L
authors: L
authors: Aliaga
authors: Estación Experimental de Choquenaira, UMSA, Viacha, Bolivia.
authors: R
authors: R
authors: Céspedes
authors: Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), Building Energy and Environment Group, Edifici GAIA (TR14), C/Rambla Sant Nebridi 22, 08222 Terrassa, Barcelona, Spain(1).
authors: J
authors: J
authors: Carbonell
mesh_terms: D000693:Anaerobiosis; D018441:Biofilms / Q000254:growth & development*; D056804:Biofuels; D001709:Biotechnology / Q000191:economics / Q000295:instrumentation* / Q000379:methods*; D003081:Cold Climate; D003080:Cold Temperature; D003365:Costs and Cost Analysis; D017752:Greenhouse Effect; D010865:Pilot Projects; D012722:Sewage / Q000382:microbiology; D014865:Waste Disposal, Fluid
chemical_list: D056804:Biofuels; D012722:Sewage
keywords: Anaerobic digestion; Biofilm carrier; Cold climate; Low cost tubular digester; Solids retention time