1 / 6

Biogas productivity model Hashimoto’s model By Jin Mi Triolo

Biogas productivity model Hashimoto’s model By Jin Mi Triolo . Hashimoto’s kinetic model. γ = volumetric CH 4 production rate, m 3 CH 4 m -3 reactor volume per day , B 0 =ultimate CH 4 yield, m 3 CH 4 kg -1 (VS) ,

nova
Download Presentation

Biogas productivity model Hashimoto’s model By Jin Mi Triolo

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Biogas productivity model Hashimoto’s model By Jin Mi Triolo

  2. Hashimoto’s kinetic model γ = volumetric CH4 production rate, m3CH4 m-3 reactor volume per day, B0 =ultimate CH4 yield, m3CH4 kg-1(VS), S0 = influent VS concentration Kg(VS)/m3(feed) , feed is biomass μm = maximum specific growth rate/day, days-1, μm = 0.013T – 0.129 HTR= hydraulic retention times/ day, K=kinetic parameter, dimensionless (K=0.6+0.0206 exp (0.051*S0))

  3. Hashimoto’s kinetic model • CH4 productivity is a function of • ultimate CH4 yield (B0) • influent substrate concentration(volatile solids, VS) • retention time (HTR) • kinetic parameters K • μm • K = 0.6+0.0206 exp (0.051*VS) • μm = 0.013T – 0.129 T = temperature For assessing biogas yield by Hashimoto’s model B0, VS, Operation time(HRT), operation temperature(T) Required !

  4. Hashimoto’s two kinetic parameters K = 0.6+0.0206 exp (0.051*S0)) μm = 0.013T – 0.129 T = temperature Following Hashimoto, μm = temperature dependent μm increase linearly, as T increases But only in (20°C < T <60°C) μm is not applicable for the T lower than 20°C. Requirement of building new kinetic algorithm for lower temperatures. • When VS increases, • K increases exponentially. • Inhibition strength simply estimated only using VS concentration, but highly • predictible.

  5. Example of hashimoto’s curve Batch experiment Predicted by Hashimoto’s model

  6. Exercise • Pig fattening manure • 5 pigs • BMP :350 L/kg VS • Hydraulic retention time 30 d • Operation temperature 25 °C • Calculate how much slurry they excrete per day? • Calculate volumetric biogas yield at 25 °C? • Cattle manure • 2 cows • Calculate how much slurry they excrete per day • BMP :195 L/kg VS • Hydraulic retention time 30 d • Operation temperature 25 °C • Calculate how much slurry they excrete per day? • Calculate volumetric biogas yield at 25 °C?

More Related