Improving methane content and yield from rice straw by adding extra hydrogen into a two-stage anaerobic digestion system

Li, Zhengwei; Wachemo, Akiber Chufo; Yuan, Hairong; Korai, Rashid Mustafa

doi:10.1016/j.ijhydene.2019.07.235

Cited by 18 publications

(12 citation statements)

References 58 publications

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“…The genus (∼15%) Methanotermobacter was also found in sample A2. This genus is characterized by being present in thermophilic anaerobic digestions and belongs to the obligate-hydrogenotrophic methanogens (Li et al, 2020). This fact corroborates the possibility that the predominant metabolic route in the co-digestion of vinasse, filter cake, and deacetylation liquor is acetate (SAO) coupled with hydrogenotrophic methanogenesis.…”

Section: Resultsmentioning

confidence: 99%

“…Methanosaeta is known as obligate-acetoclastic methanogen and has a strong affinity to acetate (Li et al, 2020). These two genera are not found in sample A2, indicating how there was a change in the microbial community from sample A1 to A2 due to different substrates and experimental conditions.…”

Section: Methanosaeta Methanobacterium Is Known As Hydrogenotrophic M...mentioning

confidence: 99%

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Fe₃O₄nanoparticles to optimize the co-digestion of vinasse, filter cake, and deacetylation liquor: operational aspects and microbiological routes

Volpi

Mockaitis

Bruant

et al. 2022

Preprint

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The co-digestion of residues from the sugarcane industry has already proven to be a highly attractive process for biogas production through anaerobic digestion (AD). The use of residues such as vinasse (1G) filter cake (1G) and deacetylation liquor (2G) in operation in a continuous CSTR reactor showed a possibility of integration of 1G and 2G ethanol biorefineries through AD in previous work by our research group. The use of nanoparticles (NP) is a favorable way to optimize AD processes, as these additives serve as a means of introducing nutrients into the process in a more assertive way from the point of view of distribution and interaction with microorganisms. In this context, the present work proposed the optimization of the co-digestion of vinasse, filter cake, and deacetylation liquor in a continuous reactor through the addition of Fe3O4 NP, by the purpose of comparison results with the operation of the same substrates and the same condition but without NP. Initially, tests were carried out in batches with different concentrations of NPs, to evaluate the best concentration to be added in the continuous reactor. A concentration of 5 mg L-1 was chosen, and it was added to each increase in organic rate load (ORL) used in the process. CH4 production reached maximum values of 2.8 ± 0.1 NLCH4 gVS-1 and organic matter removal 71 ± 0.9%, in phase VI, with ORL of 5.5 gVS L-1 day-1. This production was 90% higher than the reactor co-digestion operation without the presence of NP. Furthermore, according to the results of pH, alkalinity, it can be concluded that the methanogenesis stabilized at 60 days of operation, being 30 days before when there was no NP added. The development of AD was stable, with low variations in the oxidation-reduction potential (ORP) and with stable organic acid (OA) concentrations, indicating the possibility of route propionic acid to produce CH4. The main methanogenic Archeae found was Methanoculleus, indicating that the predominant metabolic route was that of syntrophic acetate oxidation (SAO) coupled with hydrogenotrophic methanogenesis. The use of Fe3O4 NP managed to improve the AD operation of residues from the 1G2G ethanol production industry and did not modify the microbial community present, only stimulated their growth.

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Section: Resultsmentioning

confidence: 99%

Section: Methanosaeta Methanobacterium Is Known As Hydrogenotrophic M...mentioning

confidence: 99%

Fe₃O₄nanoparticles to optimize the co-digestion of vinasse, filter cake, and deacetylation liquor: operational aspects and microbiological routes

Volpi

Mockaitis

Bruant

et al. 2022

Preprint

View full text Add to dashboard Cite

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Section: Biological Methanation Of Hydrogenmentioning

confidence: 99%

“…Methanobacterium was one of the prevalent archaea found by Li et al (2020) on the conversion of hydrogen to methane in a two-stage anaerobic digester fed with rice-straw. It was possible to increase the methane yield (by 45%) and the methane share in the biogas (by 101%) through addition of hydrogen to a STR -upflow reactor combination (Li et al, 2020). The concept of hydrogen addition to upgrade the produced biogas was also investigated in a two-stage thermophilic reactor (STR and upflow reactor) digesting cattle manure and potato-starch by Corbellini et al (2018).…”

Section: Biological Methanation Of Hydrogenmentioning

confidence: 99%

“…The upgrade of the SCCAenriched liquid effluent generated in the first stage can lead to higher energy recovery and higher degradation efficiency than in traditional biogas production processes (O-Thong, 2018). Li et al (2020) tested a semi-continuous two-stage AD system for biohythane production from cornstalk. The hydrogen production in the first-stage reached 25 ml/g-TS, the hydrogen content in the biohythane gas was 18.47%.…”

Section: Economic Competitiveness and Alternative Productsmentioning

confidence: 99%

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Phase Separation in Anaerobic Digestion: A Potential for Easier Process Combination?

et al. 2021

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The flexibilization of bioenergy production has the potential to counteract partly other fluctuating renewable energy sources (such as wind and solar power). As a weather-independent energy source, anaerobic digestion (AD) can offer on-demand energy supply through biogas production. Separation of the stages in anaerobic digestion represents a promising strategy for the flexibilization of the fermentative part of biogas production. Segregation in two reactor systems facilitates monitoring and control of the provision of educts to the second methanogenic stage, thus controlling biogas production. Two-stage operation has proven to reach similar or even higher methane yields and biogas purities than single-stage operation in many different fields of application. It furthermore allows methanation of green hydrogen and an easier combination of material and energy use of many biogenic raw and residual biomass sources. A lot of research has been conducted in recent years regarding the process phase separation in multi-stage AD operation, which includes more than two stages. Reliable monitoring tools, coupled with effluent recirculation, bioaugmentation and simulation have the potential to overcome the current drawbacks of a sophisticated and unstable operation. This review aims to summarize recent developments, new perspectives for coupling processes for energy and material use and a system integration of AD for power-to-gas applications. Thereby, cell physiological and engineering aspects as well as the basic economic feasibility are discussed. As conclusion, monitoring and control concepts as well as suitable separation technologies and finally the data basis for techno-economic and ecologic assessments have to be improved.

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Biodegradation and photocatalysis of pharmaceuticals in wastewater

Farissi¹,

Ramesh²,

Muthukumar³

et al. 2022

Development in Wastewater Treatment Research and Processes

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Improving methane content and yield from rice straw by adding extra hydrogen into a two-stage anaerobic digestion system

Cited by 18 publications

References 58 publications

Fe₃O₄nanoparticles to optimize the co-digestion of vinasse, filter cake, and deacetylation liquor: operational aspects and microbiological routes

Fe₃O₄nanoparticles to optimize the co-digestion of vinasse, filter cake, and deacetylation liquor: operational aspects and microbiological routes

Phase Separation in Anaerobic Digestion: A Potential for Easier Process Combination?

Biodegradation and photocatalysis of pharmaceuticals in wastewater

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Improving methane content and yield from rice straw by adding extra hydrogen into a two-stage anaerobic digestion system

Cited by 18 publications

References 58 publications

Fe3O4nanoparticles to optimize the co-digestion of vinasse, filter cake, and deacetylation liquor: operational aspects and microbiological routes

Fe3O4nanoparticles to optimize the co-digestion of vinasse, filter cake, and deacetylation liquor: operational aspects and microbiological routes

Phase Separation in Anaerobic Digestion: A Potential for Easier Process Combination?

Biodegradation and photocatalysis of pharmaceuticals in wastewater

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Product

Resources

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Fe₃O₄nanoparticles to optimize the co-digestion of vinasse, filter cake, and deacetylation liquor: operational aspects and microbiological routes

Fe₃O₄nanoparticles to optimize the co-digestion of vinasse, filter cake, and deacetylation liquor: operational aspects and microbiological routes