Methane Fermentation of Diluted Food Waste by Self-Agitated Anaerobic Baffled Reactor with Fixed Carrier

Anaerobic fermentative technology is an important route to solving environmental pollution and resources problems. Combined hydrogen and methane production in a two-stage process is a concept which has been developed in recent years Anaerobic biological treatment organic wastewater can produce large amounts of hydrogen and methane，which can be used as energy carrier. At present，the research focusing on the adjustment of fermentation hydrogen-methane production has been conducted. Furthermore, the simultaneous hydrogen-methane production was tested and optimized. However, it lacked combined hydrogen-methane production in an anaerobic reactor in literature so far. Based on preview experiment, the paper studied the simultaneous hydrogen-methane fermentation in an anaerobic baffled reactor (ABR) system. ABR has the advantage of biomass phase separation and integration of acidogenic and methanogenic processes to simultaneously conduct hydrogen-methane production during wastewater treatment. Through deep biohydrogen production, it can enhance the activity of hydrogen-producing acetogens (HPA) and the efficiencies of the combined hydrogen-methane fermentation system. It showed to enhance the activity of HPA was the key to the combined hydrogen-methane production.

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Effect of Digestate from Methane Fermentation using Ulva sp. and Food Waste for Cultivation of Decolored Pyropia yezoensis (Edible Laver Seaweed)

European Journal of Sustainable Development Research ◽

10.29333/ejosdr/8209 ◽

2020 ◽

Vol 4 (4) ◽

pp. em0128 ◽

Cited By ~ 5

Author(s):

Kana Kuroda ◽

Ryo Nishikawa

Keyword(s):

Food Waste ◽

Pyropia Yezoensis ◽

Methane Fermentation

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Anaerobic digestion of dried/shredded food waste in a periodic anaerobic baffled reactor

Water Science & Technology ◽

10.2166/wst.2021.230 ◽

2021 ◽

Author(s):

D. Mathioudakis ◽

I. Michalopoulos ◽

K. Kalogeropoulos ◽

K. Papadopoulou ◽

G. Lyberatos

Keyword(s):

Food Waste ◽

High Rate ◽

Upflow Anaerobic Sludge Blanket ◽

Organic Loading Rate ◽

Anaerobic Sludge ◽

Operational Parameters ◽

Operational Parameter ◽

Anaerobic Baffled Reactor ◽

Food Residue ◽

The Impact

Abstract The objective of the current work is to study the impact of the operational parameters' variation (HRT, OLR and T) on biomethane productivity in a Periodic Anaerobic Baffled Reactor (PABR). The feedstock used was a biomass product named FORBI (Food Residue Biomass), which is dried and shredded source-separated household food waste. The Periodic Anaerobic Baffled Reactor (PABR) is an innovative, high-rate bioreactor. Apart from the Hydraulic Retention Time (HRT) and the Organic Loading Rate (OLR), an important operational parameter is the Switching Period (T) of the feeding compartment: when T is high, the bioreactor operation is similar to an Anaerobic baffled reactor (ABR), while when it is low, the operation approaches that of an Upflow Anaerobic Sludge Blanket Reactor (UASBR). Nine distinct experimental phases were conducted, during which the operational parameters of the PABR were consecutively modified: the HRT varied from 9 to 2.5 days, T between 2 days and 1 and finally the OLR from 1.24 gCOD/Lbioreactor*d to 8.08 gCOD/Lbioreactor*d. The maximum biomethane yield was 384 LCH4/kgFORBI corresponding to the operation at HRT = 5 d, OLR = 2.14 gCOD/Lbioreactor*d and T = 2 days. Similar efficiency (333 LCH4/kgFORBI) was achieved at higher OLR (4.53 gCOD/Lbioreactor*d).

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