Two-Phase Anaerobic Digestion of Food Wastes for Hydrogen and Methane Production

2015 ◽  
pp. 75-90 ◽  
Author(s):  
Cristina Cavinato ◽  
David Bolzonella ◽  
Paolo Pavan ◽  
Franco Cecchi
Keyword(s):  
Anaerobic Digestion ◽  
Methane Production ◽  
Food Wastes ◽  
Two Phase

scholarly journals Enhancing methane production from the invasive macroalga Rugulopteryx okamurae through anaerobic co-digestion with olive mill solid waste: process performance and kinetic analysis

2021 ◽  
Author(s):  
D. de la Lama-Calvente ◽  
M. J. Fernández-Rodríguez ◽  
J. Llanos ◽  
J. M. Mancilla-Leytón ◽  
R. Borja
Keyword(s):  
Anaerobic Digestion ◽  
Solid Waste ◽  
Methane Production ◽  
Methane Yield ◽  
Specific Rate ◽  
Order Kinetic ◽  
Two Phase ◽  
First Order ◽  
Olive Mill Solid Waste ◽  
Olive Mill

AbstractThe biomass valorisation of the invasive brown alga Rugulopteryx okamurae (Dictyotales, Phaeophyceae) is key to curbing the expansion of this invasive macroalga which is generating tonnes of biomass on southern Spain beaches. As a feasible alternative for the biomass management, anaerobic co-digestion is proposed in this study. Although the anaerobic digestion of macroalgae barely produced 177 mL of CH4 g−1 VS, the co-digestion with a C-rich substrate, such as the olive mill solid waste (OMSW, the main waste derived from the two-phase olive oil manufacturing process), improved the anaerobic digestion process. The mixture improved not only the methane yield, but also its biodegradability. The highest biodegradability was found in the mixture 1 R. okamurae—1 OMSW, which improved the biodegradability of the macroalgae by 12.9% and 38.1% for the OMSW. The highest methane yield was observed for the mixture 1 R. okamurae—3 OMSW, improving the methane production of macroalgae alone by 157% and the OMSW methane production by 8.6%. Two mathematical models were used to fit the experimental data of methane production time with the aim of assessing the processes and obtaining the kinetic constants of the anaerobic co-digestion of different combination of R. okamurae and OMSW and both substrates independently. First-order kinetic and the transference function models allowed for appropriately fitting the experimental results of methane production with digestion time. The specific rate constant, k (first-order model) for the mixture 1 R. okamurae- 1.5 OMSW, was 5.1 and 1.3 times higher than that obtained for the mono-digestion of single OMSW and the macroalga, respectively. In the same way, the transference function model revealed that the maximum methane production rate (Rmax) was also found for the mixture 1 R. okamurae—1.5 OMSW (30.4 mL CH4 g−1 VS day−1), which was 1.6 and 2.2 times higher than the corresponding to the mono-digestions of the single OMSW and sole R. okamurae (18.9 and 13.6 mL CH4 g−1 VS day−1), respectively.

Contribution of H2 during the Two-Phase Anaerobic Digestion

2014 ◽  
Vol 908 ◽  
pp. 235-238
Author(s):  
Fang Yin ◽  
Wu Di Zhang ◽  
Ling Xu ◽  
Jing Liu ◽  
Hong Yang ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Microbial Community ◽  
Anaerobic Digestion ◽  
Hydrogen Production ◽  
Methane Production ◽  
Energy Recovery ◽  
Fermentation Process ◽  
Energy Conversion Efficiency ◽  
Two Phase ◽  
Technological Support

In the process of anaerobic digestion for methane production, one-third of which is from hydrogen, another two-thirds from acetic acid. From the point of material and energy recovery, the energy conversion efficiency of alone hydrogen or methane production is less than co-generation of hydrogen and methane production. Because hydrogen production is also accompanied by acidification and syntrophic acetogenic fermentation process, it is technically feasible for alone hydrogen or methane production. As the two-phase anaerobic digestion separate the acidifying bacteria and methanogens in different reactors, blocking the synergy of the two different microbial community, we should provide scientific and technological support for two-phase anaerobic application.

Thermophilic anaerobic fermentation of olive pulp for hydrogen and methane production: modelling of the anaerobic digestion process

2006 ◽  
Vol 53 (8) ◽  
pp. 271-279 ◽  
Author(s):  
H.N. Gavala ◽  
I.V. Skiadas ◽  
B.K. Ahring ◽  
G. Lyberatos
Keyword(s):  
Anaerobic Digestion ◽  
Methane Production ◽  
Anaerobic Fermentation ◽  
Anaerobic Treatment ◽  
Two Phase ◽  
Production Of Hydrogen ◽  
Subsequent Step ◽  
Methane Potential ◽  
Olive Pulp ◽  
Semi Solid

The present study investigates the thermophilic biohydrogen and methane production from olive pulp, which is the semi-solid residue coming from the two-phase processing of olives. It focussed on: a) production of methane from the raw olive pulp; b) anaerobic bio-production of hydrogen from the olive pulp; c) subsequent anaerobic treatment of the hydrogen-effluent with the simultaneous production of methane; and d) development of a mathematical model able to describe the anaerobic digestion of the olive pulp and the effluent of hydrogen producing process. Both continuous and batch experiments were performed. The hydrogen potential of the olive pulp amounted to 1.6 mmole H2 per g TS. The methane potential of the raw olive pulp and hydrogen-effluent was as high as 19 mmole CH4 per g TS suggesting that: a) olive pulp is a suitable substrate for methane production; and b) biohydrogen production can be very efficiently coupled with a subsequent step for methane production.

Effect of biochar addition on hydrogen and methane production in two-phase anaerobic digestion of aqueous carbohydrates food waste

2016 ◽  
Vol 219 ◽  
pp. 29-36 ◽  
Author(s):  
Nimas M.S. Sunyoto ◽  
Mingming Zhu ◽  
Zhezi Zhang ◽  
Dongke Zhang
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Methane Production ◽  
Two Phase

Effect of biochar addition on microbial community and methane production during anaerobic digestion of food wastes: The role of minerals in biochar

2021 ◽  
Vol 323 ◽  
pp. 124585
Author(s):  
Yusron Sugiarto ◽  
Nimas Mayang S. Sunyoto ◽  
Mingming Zhu ◽  
Isabelle Jones ◽  
Dongke Zhang
Keyword(s):  
Microbial Community ◽  
Anaerobic Digestion ◽  
Methane Production ◽  
Food Wastes

Two-phase anaerobic digestion of the organic fraction of municipal solid waste: estimation of methane production

2012 ◽  
Vol 30 (7) ◽  
pp. 720-726 ◽  
Author(s):  
Prayoon Fongsatitkul ◽  
Panagiotis Elefsiniotis ◽  
David G Wareham
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Methane Production ◽  
Organic Fraction ◽  
Two Phase
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