Co-ensiling of straw with sugar beet leaves increases the methane yield from straw

Larsen, Søren Ugilt; Hjort-Gregersen, K.; Vazifehkhoran, Ali Heidarzadeh; Triolo, Jin Mi

doi:10.1016/j.biortech.2017.08.117

Cited by 68 publications

(40 citation statements)

References 37 publications

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“…However, the results show that in some cases it is very difficult to obtain a reliable quantitative estimation of BMP preservation from COD losses by H2 and CH4 production. For certain conditions, this should be due to the fact that during ensiling some gains in bioavailability may occur (due to further hydrolysis of the inaccessible fractions [3,16,18]), which has not been integrated into the model. In addition, when the ensiling is very inefficient, namely for CM-Fresh, the preservation of the BMP is overestimated by the simulations.…”

Section: Bmp Conservationmentioning

confidence: 99%

“…These chemical pathways are illustrated in Table 1. Ensiling is particularly interesting for AD as it can lead to full preservation of the biomethane potential (BMP) of feedstocks for prolonged durations (that can reach up to 1 year) [2,7,[9][10][11][12][13][14][15][16][17][18]. However, ensiling performance is extremely dependent on the feedstock and its biochemical properties, notably the total solids (TS) level, the amount of accessible carbohydrates, the buffering capacity and the nature of the initial endogenous microflora [3,4].…”

Section: Introductionmentioning

confidence: 99%

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Mathematical modelling of the ensiling process before biogas production: Strengthening the links between biomass storage and anaerobic digestion

Franco

Bayard

Buffière

2018

Chemical Engineering Journal

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A stoechio-kinetic model describing the evolution of biomass through the ensiling process was developed. The model framework is based on the ADM1 in order to establish a mathematical link between ensiling and anaerobic digestion. Data from ensiling experiments with catch crop and cattle manure were used for model implementation. The model accurately describes the evolution of chemical species under most of storage conditions. Only very few adjusted parameters varied among the tested conditions, notably certain kinetic coefficients. These coefficients depend on the nature and biochemical characteristics of the feedstock. Simulations of the conservation of the biomethane potential were qualitatively consistent with the experimental results. However, additional reactions or inhibitory phenomena should be added to enhance quantitative reliability of this parameter in some cases. Simulations results show that hydrolysis reactions have low kinetic constants during ensiling (0.001-0.012 d-1). Furthermore, different tolerance levels to pH and dryness among microbial populations were identified. Lactic acid bacteria can proliferate at low pH and low moisture content.

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Section: Bmp Conservationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mathematical modelling of the ensiling process before biogas production: Strengthening the links between biomass storage and anaerobic digestion

Franco

Bayard

Buffière

2018

Chemical Engineering Journal

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“…These methods include physical methods such as milling [10], microwave [11], extrusion [12] or ultrasonication [13]; chemical methods such as alkaline or acid hydrolysis [14,15]; physiochemical methods such as steam explosion [16] or liquid hot water [17]; and biological methods with enzymatic pre-treatment [18] among others. In spite of being able to increase the biodegradability and methane (CH 4 ) yield from lignocellulosic biomasses, the majority of the lab-scale pre-treatments are technically challenged if upscaled and are unfavorable regarding the cost of additives and their energy consumption [19].…”

Section: Introductionmentioning

confidence: 99%

“…dextranicum strains and Lactobacillus strains, which would promote the lactic acid fermentation during co-ensiling [30]. As a result of this, the organic acids will break down the waxy hydrophobic surface of straw and function as acid catalysts to disrupt the ester bonds in the biopolymers [19]. The high DM content in straw will minimize the risk of effluent loss from the sugar beet roots, as straw can absorb excess liquid, and may prevent the clostridial growth, which is typically inhibited at DM contents above 30% [26].…”

Section: Introductionmentioning

confidence: 99%

Co-Ensiling of Wheat Straw as an Alternative Pre-Treatment to Chemical, Hydrothermal and Mechanical Methods for Methane Production

et al. 2020

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Wheat straw without pre-treatment is only converted to methane to a low degree during anaerobic digestion for fuel production due to its low hydrolysis. Current pre-treatment technologies are challenged by high expenses to energy or chemical agents. We examined the low-tech co-ensiling pre-treatment as an alternative pre-treatment of wheat straw, and compared the results with hydrothermal, chemical and mechanical pre-treatment methods. The effects of co-ensiling duration and the mixing ratio between straw and sugar beet root on the methane yields, surface morphology and chemical composition were examined. It was found that co-ensiling could improve production of methane by 34.7%, while a combined hydrothermal and chemical pre-treatment could increase the production of methane by 25.4%. The study demonstrated that the effect of co-ensiling could overlap with hydrothermal and chemical pre-treatment by having similar effects to increase lignocellulosic hydrolysis and improve methane production.

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“…In the technologies of alternative use of sugar beet for biogas, in European countries, as well as in Poland, significant technical progress is noted, especially in the field of storage and preparation of substrates for biogas plants [25,26,27,28]. The substrate must be available throughout the all year while the harvest is carried out seasonally.…”

Section: Introductionmentioning

confidence: 99%

The usefulness of sugar beets for biogas production in relations of the storage time and sugar content

et al. 2018

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The aim of the study was to evaluate the usefulness of sugar beet for biogas production, taking into account the duration time of storage and sugar content in the roots. The research has included analysis of methane and biogas yield of sugar beet. The relations between the sugar content in the roots and the length of storage period and the course of the methane fermentation process were determined. Sugar beets with sugar content of 17.6% and 19.6% were used for this experiment. In order to analyse the fermentation process, the fresh beets and the beets stored in flexible, hermetic tanks in the period of 43 and 89 days were used. Based on the analysis of the obtained results, it was found that the sugar content and the storage time of sugar beet roots can differentiate the production of biomethane and that it influences the methane fermentation process and the quality of the produced biogas.

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Co-ensiling of straw with sugar beet leaves increases the methane yield from straw

Cited by 68 publications

References 37 publications

Mathematical modelling of the ensiling process before biogas production: Strengthening the links between biomass storage and anaerobic digestion

Mathematical modelling of the ensiling process before biogas production: Strengthening the links between biomass storage and anaerobic digestion

Co-Ensiling of Wheat Straw as an Alternative Pre-Treatment to Chemical, Hydrothermal and Mechanical Methods for Methane Production

The usefulness of sugar beets for biogas production in relations of the storage time and sugar content

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