Methane production from food waste via mesophilic anaerobic digestion with ethanol pre-fermentation: Methanogenic pathway and microbial community analyses

Zou, Hui; Gao, Ming; Yu, Miao; Zhang, Wenyu; Zhang, Shuang; Wu, Chuanfu; Tashiro, Yukihiro

doi:10.1016/j.biortech.2019.122450

Cited by 21 publications

(7 citation statements)

References 28 publications

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“…Methanothrix and Methanobacterium are the more readily detectable archaea in anaerobic digestion. 49 Methanothrix is an acetic acid-consuming methanogenic bacterium that cannot utilize hydrogen or formate. Methanobacterium is a hydrogenotrophic methanogenic bacterium.…”

Section: Methanogenesis Results and Analysis Of Sodiummentioning

confidence: 99%

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Nickel Foam Promotes Syntrophic Metabolism of Propionate and Butyrate in Anaerobic Digestion

Zhou

et al. 2021

ACS Omega

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Enhanced interspecies electron transfer (IET) among symbiotic microorganisms is an effective method to increase the rate of methane (CH 4 ) production in anaerobic digestion. Direct interspecies electron transfer (DIET), which does not involve dissolved redox media, is considered an alternative and superior method to enhance methane production by interspecific hydrogen (H 2 ) transfer (IHT). In this study, nickel foam was built into a semicontinuous anaerobic reactor to investigate its effect on the metabolism of propionate and butyrate. Both increased the average yield of CH 4 in anaerobic digestion by 18.1 and 15.9%, respectively. Analysis of bacterial and archaeal communities showed that the addition of nickel foam could increase the relative abundance of microbial communities involved in DIET and could increase the diversity of microorganisms in the reactor. Moreover, the anaerobic digestion performance of the nickel foam reactor was good at high hydrogen partial pressure.

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Section: Methanogenesis Results and Analysis Of Sodiummentioning

confidence: 99%

“…In all four reactors, Methanothrix and Methanobacterium are the two archaeal genera that account for a high proportion of the total. Methanothrix and Methanobacterium are the more readily detectable archaea in anaerobic digestion …”

Section: Resultsmentioning

confidence: 99%

Nickel Foam Promotes Syntrophic Metabolism of Propionate and Butyrate in Anaerobic Digestion

Zhou

et al. 2021

ACS Omega

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“…Zou et al 36 . and Zou et al ., 37 using ethanol isotopes, observed that ethanol increases the activity of hydrogenotrophic microorganisms. Except for acetate, no other VFA presented this behavior.…”

Section: Resultsmentioning

confidence: 99%

“…Except for propionic acid, acetic acid reports the lowest Vmax of all tested substrates and the lowest Km. Zou et al 36 and Zou et al, 37 using ethanol isotopes, observed that ethanol increases the activity of hydrogenotrophic microorganisms. Except for acetate, no other VFA presented this behavior.…”

Section: Determination Of the Kinetic Parametersmentioning

confidence: 99%

Kinetic analysis of the methanization of the byproducts from OFMSW fermentation

Jojoa-Unigarro

González‐Martínez

2021

J of Chemical Tech & Biotech

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BACKGROUND During anaerobic digestion of wastes, volatile fatty acid (VFA) production has been studied, but little attention has been paid to alcohols and lactic acid. Thermodynamically, lactic acid and alcohols are better substrates to produce methane than other VFA. This research identified the metabolites produced during the fermentation of the organic fraction of municipal solid waste and studied their methanization in a second stage. Analysis of the methane production curves is provided and explained according to Gibbʼs free energy of acetogenesis and methanogenesis. Based on the Michaelis–Menten model, a kinetic analysis is presented. RESULTS The specific methane production of the identified acids and alcohols are acetic acid, 343 NL/kgCOD; ethanol, 296; methanol, 181; butyric acid, 108; lactic acid, 64. Lactic and butyric acids present a long adaptation phase followed by a fast and short methane production. Acetic acid and ethanol finished the reaction in less than 16 h. The highest methane production rates (Vmax) were for butyric acid, methanol, and ethanol with 2136, 1934, and 1928 NmL L–1, respectively. The best affinity (lowest Km) values were for acetic and lactic acids and ethanol with 1.2, 1.9, and 2.0 gCOD L–1. CONCLUSION Together, acetic acid and ethanol represent 92% of all fermentation products. No endogenous methane production was observed during the methanization from acetic acid and ethanol. The highest specific methane production belongs to acetic acid (98% of the theoretical) and the lowest corresponds to lactic acid. Except for propionic acid, the methanization of the selected substrates follows the Michaelis and Menten model. © 2021 Society of Chemical Industry (SCI).

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“…Three genera represent more than 98% of the archaea present in the community (Figure 7). Under conventional operation without the DTC strategy, the genus Methanosaeta was most abundant (56%), but this relative abundance was reduced to 30% after the use of DTC during 10 operational cycles, where its presence was due to the CH 4 production through acetoclastic methanogenesis associated to the acetic acid reduction and responsible for up to 70% of CH 4 production in the system (Sposob et al 2020;Zou et al 2020). Methanosaeta and Methanobacterium were the two genera that represented more than 60% of the archaea in the system, independent of the T r defined by the DTC.…”

Section: Microbial Community Characterizationmentioning

confidence: 99%

Methane production from food waste using a feedback control strategy in a sequencing batch reactor

Jiménez-Ocampo

Vargas

Moreno‐Andrade

2021

Water Science and Technology

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The performance of a feedback control strategy in the operation of a sequencing batch reactor was evaluated. This strategy uses the online biogas flow measurements to define the duration of the reaction phase of each operating cycle, thereby increasing the energy production of the system and maximizing the methane production rate. The reaction phase is ended when the biogas flow rate reaches a sustained value significantly lower value than the maximum flow rate achieved, as a consequence of the depletion of the CODsoluble. The implementation of the depletion-time control was successful and reached a maximum methane production rate of 1.22 LCH4/d, showing an average productivity of 0.73 ± 0.3 LCH4/d. The reaction phase varied from 1.2 to 6 days with hydraulic retention times from 6 to 30 days. The use of this feedback control strategy increased the methane production and the energy production in 80% of the evaluated cycles (from 10.4 to 43.8%) compared to the operation of conventional anaerobic digestion without a control strategy. Furthermore, the strategy is easy to implement since it does not require complex calculations and uses a readily available biogas flow rate sensor.

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Methane production from food waste via mesophilic anaerobic digestion with ethanol pre-fermentation: Methanogenic pathway and microbial community analyses

Cited by 21 publications

References 28 publications

Nickel Foam Promotes Syntrophic Metabolism of Propionate and Butyrate in Anaerobic Digestion

Nickel Foam Promotes Syntrophic Metabolism of Propionate and Butyrate in Anaerobic Digestion

Kinetic analysis of the methanization of the byproducts from OFMSW fermentation

Methane production from food waste using a feedback control strategy in a sequencing batch reactor

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