Use of trace elements addition for anaerobic digestion of brewer's spent grains

Bougrier, Claire; Dognin, Delphine; Laroche, Cécile; Rivero, Jesús Andrés Cacho

doi:10.1016/j.jenvman.2018.06.014

Cited by 32 publications

(16 citation statements)

References 18 publications

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“…Bougrier et al. [ 12 ] reported that enhanced salinity levels decreased TSP levels in the co‐fermentation of sewage sludge and food wastes. These decreased TSP levels may be due to an increase in osmotic pressure leading to plasmolysis.…”

Section: Resultsmentioning

confidence: 99%

Effect of Saline Sludge on Anaerobic Digestion of Kitchen Waste for Methane Generation: Modeling and Fertilizer Recovery

Siddique

Khalid

Ibrahim

et al. 2023

CLEAN Soil Air Water

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A comparative study of methane recovery by co-digesting kitchen waste and saline sewage sludge is performed to evaluate its feasibility for waste minimization. The experiment is performed at 37 °C having a mixing speed of 100 rpm and pH of 6.49-7.5 in anaerobic mixed batch reactors. The higher salinity level of the saline sewage sludge reduces the degradation rate of kitchen waste causing an enhancement in soluble chemical oxygen demand by 133% compared with 280% when co-digesting with the non-saline sample. The inhibitory behavior is in line with the low volatile solid elimination efficiency of 31% of saline against 55% of non-saline sludge. The Gompertz modeling, based on the outcomes, fits the cumulative methane generation trends quite well, with a strong correlation coefficient (>0.994). Besides, use of the non-saline sludge results in three times more methane production than the saline sample digestion. Sludge recovery is 0.07 m 3 sludge m −3 wastewater, and water recovery is 0.84 m 3 m −3 wastewater. The liquid produced from the fermentation of the slurry can be used for irrigation as well as fertilization. Kitchen waste co-digestion with both sludge samples has been proven to be a practical method for exploiting the extra digestion capacity of wastewater treatment plants currently in operation, but it is more practical for non-saline sludge.

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Section: Resultsmentioning

confidence: 99%

Effect of Saline Sludge on Anaerobic Digestion of Kitchen Waste for Methane Generation: Modeling and Fertilizer Recovery

Siddique

Khalid

Ibrahim

et al. 2023

CLEAN Soil Air Water

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“…Various studies carried out biomethane potential analyses or continuous digestion trials on BSG and reported a biogas potential in the range of 270-380 l kg −1 substrate. However, without any co-digestion of further feedstock addition like manure, supplementation of trace elements is required to keep up a stable anaerobic digestion process (Vavilin et al, 2008;Bochmann et al, 2015;Bougrier et al, 2018; IEA Bioenergy Task 37, 2018).…”

Section: Residue Amountmentioning

confidence: 99%

Anaerobic Digestion of Pretreated Industrial Residues and Their Energetic Process Integration

Bochmann

Pesta

Rachbauer

et al. 2020

Front. Bioeng. Biotechnol.

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The food and beverage industry offers a wide range of organic feedstocks for use in biogas production by means of anaerobic digestion (AD). Microorganisms convert organic compounds-solid, pasty, or liquid ones-within four steps to biogas mainly consisting of CH 4 and CO 2. Therefore, various conversion technologies are available with several examples worldwide to show for the successful implementation of biogas technologies on site. The food and beverage industry offer a huge potential for biogas technologies due to the sheer amount of process residues and their concurrent requirement for heat and power. The following study analyzes specific industries with respect to their implementation potential based on arising waste and heat and power demand. Due to their chemical composition, several feedstocks are resistant against microbiological degradation to a great extent. A combination of physical-, chemical-, and microbiological pretreatment are used to increase the biological availability of the feedstock. The following examples will discuss how to best implement AD technology in industrial processes. The brewery industry, dairy production, slaughterhouses, and sugar industry will serve as examples.

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“…The residuals are largely composed of β-glycans such as cellulose, hemicellulose, and arabinoglycans as well as lignin and other aromatic substances that are slowly degraded in anaerobic environments [2,4]. In addition, it has been suggested that biogas production from BSG is often hampered by a lack of trace elements such as Cu, Mo, and Zn that act as cofactors in fermentation as well as methanogenesis and that a lack of these elements often leads to digester instability and failure [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Improving Anaerobic Digestion of Brewery and Distillery Spent Grains through Aeration across a Silicone Membrane

et al. 2022

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An increase in the number of independent breweries and distilleries has led to an increase in the amount of spent grains with inadequate means of disposal. One option for disposal is as feedstock for anaerobic digestion if digester stability is ensured. In this study, brewers’ spent grain and distillers’ spent grain were used as substrate for anaerobic digestion for 32 weeks. The digestate was treated by recirculation through a silicone hose located in an external tank filled with saline solution. The hose served as a permeable membrane allowing for the passage of gases. The recirculation tanks were fitted with check valves to maintain three pressure/gas regimes: 26 mm Hg N2, 26 mm Hg aeration or 100 mm Hg aeration. A fourth digester was operated with no recirculation as the control. These treatments were chosen to determine if differences in digester stability, wastewater treatment efficiency, and biogas production could be detected. A combination of dairy and swine manure was used as seeding to provide a methanogenic consortium and bicarbonate buffering. However, despite trying to provide for adequate initial bicarbonate buffering, all four digesters had low initial buffering and consequently low pH as short-chain fatty acids accumulated. After six weeks, bicarbonate buffering and pH increased as methane production increased, and short-chain fatty acids decreased. Later, despite the fluxes of O2 and N2 across the silicone membrane being very low, differences between the various treatments were noted. The pH of the digestate treated by N2 recirculation was lower than the other digesters and decreased further after distillers’ spent grain was substituted for brewers’ spent grain. Aeration at a pressure of 26 mm Hg and 100 mg Hg increased biogas production compared to other treatments but only significantly so at 100 mm Hg. These results suggest that partial purging of dissolved gases in anaerobic digestate by the small fluxes of N2 or O2 across a permeable membrane may affect digester performance.

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Use of trace elements addition for anaerobic digestion of brewer's spent grains

Cited by 32 publications

References 18 publications

Effect of Saline Sludge on Anaerobic Digestion of Kitchen Waste for Methane Generation: Modeling and Fertilizer Recovery

Effect of Saline Sludge on Anaerobic Digestion of Kitchen Waste for Methane Generation: Modeling and Fertilizer Recovery

Anaerobic Digestion of Pretreated Industrial Residues and Their Energetic Process Integration

Improving Anaerobic Digestion of Brewery and Distillery Spent Grains through Aeration across a Silicone Membrane

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