Anaerobic digestion of Brewery Spent Grains: Trace elements addition requirement

Bougrier, Claire; Dognin, Delphine; Laroche, Cécile; Gonzalez, Valérie; Benali-Raclot, Dalel; Rivero, Jesús Andrés Cacho

doi:10.1016/j.biortech.2017.08.211

Cited by 32 publications

(11 citation statements)

References 12 publications

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“…In addition, BSG represent an increasing environmental problem, so more options have been studied: as a source of healthy nutrients providing protection for cardiovascular diseases and cancer through arabinoxylans derived from BSG [12] and through BSG-enriched biscuits [13]; as construction material using BSG as an additive in the production of building bricks [14] providing higher strength, higher porosity, and a lower density, which give them better properties of thermal insulation than those produced from a similar production clay; and as biomass for biogas production through anaerobic digestion, reported as an application especially appropriate for BSG due to their high moisture content [15,16]. However, biogas production from BSG is repressed by intermediate lignocellulosic biodegradation products [15,16]. This inhibition is not prevented even by submitting BSG to mechanical, thermochemical, or chemical pretreatments [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…However, biogas production from BSG is repressed by intermediate lignocellulosic biodegradation products [15,16]. This inhibition is not prevented even by submitting BSG to mechanical, thermochemical, or chemical pretreatments [15,16]. Therefore, according to Mussato [3], biogas production from BSG needs further developments in order to achieve stable production; this is beyond the scope of the present work.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Analysis of Brewers’ Spent Grains Steam Gasification in an Allothermal Batch Reactor

et al. 2019

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In this work, brewers’ spent grains (BSG) were evaluated and studied in order to obtain a combustible gas by means of allothermal steam gasification. BSG were preprocessed in a rotary dryer and a pelletizer prior to gasification in an indirectly heated batch reactor. BSG characterization was conducted by means of proximate, ultimate, and thermogravimetric analysis, allowing us to conclude that BSG have characteristics comparable to those of regular lignocellulosic biomasses. Gasification tests were performed in an allothermal bench-scale batch reactor in order to determine the effect of temperature and steam-to-biomass ratio (S/B) in the produced gas. The produced gas was mainly composed of 22.8–30.2% H2, 15.1–22.3% CO, and 7.2–11.1% CH4, contributing to a heating value of 8.11–9.0 MJ/Nm3 with the higher values found for a low S/B ratio and for high temperatures. The performance of the process was assessed by evaluating the cold gas and carbon conversion efficiencies. These indicators were found to be in the ranges 47.0%–52.1% and 57.0%–62.7%, respectively. The main conclusion of this work is that the produced gas obtained from BSG steam gasification has sufficient quality to open other options to beer producers to use their own brewing wastes to satisfy their energy needs, allowing them to progress toward the circular economy concept.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Brewers’ Spent Grains Steam Gasification in an Allothermal Batch Reactor

et al. 2019

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“…Mineral nutrients play an important role as the growing factors supporting the microorganisms' metabolism to maintain the effective digestion process (Sibiya et al 2015;Choong et al 2016). Methanogens are highly dependent on micronutrients such as Fe, Zn, Ni, Cu, Co, Mn, which stimulate reactions catalyzed by metalloenzymes, formation of cytochromes, and ferroxins (Moestedt et al 2016;Bougrier et al 2018). Macronutrients (C, N, S, P, H) also play an important role in the growth and metabolism of anaerobic microorganisms acting as buffering agents and enzyme components (Pobeheim et al 2010;Takashima et al 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Macronutrients (C, N, S, P, H) also play an important role in the growth and metabolism of anaerobic microorganisms acting as buffering agents and enzyme components (Pobeheim et al 2010;Takashima et al 2011). However, the presence of nutrients in the feedstock not always guarantee that AD is efficient because the process can only be carried out successfully with the certain nutrients concentrations (Sibiya et al 2015;Bougrier et al 2018). The nutrients requirements of the mixed methanogens culture are not now well understood and may vary depending on the feedstock characteristics as well as the involved species and their methanogenic pathways (Ortner et al 2015;Choong et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Effects of Nutrients Supplementation on Enhanced Biogas Production from Maize Silage and Cattle Slurry Mixture

Zieliński

Kisielewska

Dębowski

et al. 2019

Water Air Soil Pollut

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This study investigated the effects of nutrients supplementation during codigestion of maize silage and cattle slurry. Batch anaerobic biodegradability tests lasted 20 days under mesophilic conditions, and an organic loading rate of 5.0 g VS (volatile solids)/L were done. Biogas yield increased with the dose of the cattle feed supplement up to 894 L/kg VS, which was 65% higher than in the control reactor. Similarly, the cumulative biogas production rate (CBPR) increased with successive increase in the dose of feed supplement. Supplementation enabled efficient volatile fatty acids (VFA) elimination and pH increasing; however, the best VFA/TA ratio was achieved with feed supplementation of 25 mg/g of feedstock, providing the highest rate of biogas production (k = 0.22/d). The highest increase in biogas production of 8.0 mL/mg was achieved with the lowest nutrient supplement dosage. Based on these results, it can be recommended that a supply of feed supplement at a ratio of 0.5% of the fresh mass provide considerably increasing biogas production.

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“…Hence, the TEs do not influence in a constant pattern the multivariable and complex AD environments (Banks and Heaven, 2013). However, the role of specific TE to enhance microbial growth and activity has been previously defined to some extent in the literature (Bougrier et al, 2018;Demirel and Scherer, 2011;Romero-Güiza et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Nickel spiking to improve the methane yield of sewage sludge

Tsapekos

Alvarado-Morales

Tong

et al. 2018

Bioresource Technology

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The presence of micro-nutrients can be stimulatory for the anaerobic digestion (AD) of hardly degradable wastes and thus, improve process performance. Among the essential trace elements, nickel is involved in multiple important enzymes necessary for efficient AD. The present study investigates the effect of nickel spiked sewage sludge on batch and continuous mode operation. Metal spiking was conducted in the form of nanoparticles (Ni-NPs) and salt (NiCl2•6H2O). Results from batch assays showed that 5 mgNi-Salt/kgVS in the presence of Nitrilotriacetic acid (NTA) enhanced the methane yield by ∼10% compared to the untreated sample. The impact of Ni-NPs in the AD process was also positive, but slightly lower compared to the effect of NiCl2•6H2O. The stimulatory impact of Ni was also revealed in continuously fed digester boosting the methane yield by ∼8%. Overall, the improved methane production indicated that methanogenic archaea were favoured by the simultaneous supplementation of Ni and NTA.

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Anaerobic digestion of Brewery Spent Grains: Trace elements addition requirement

Cited by 32 publications

References 12 publications

Experimental Analysis of Brewers’ Spent Grains Steam Gasification in an Allothermal Batch Reactor

Experimental Analysis of Brewers’ Spent Grains Steam Gasification in an Allothermal Batch Reactor

Effects of Nutrients Supplementation on Enhanced Biogas Production from Maize Silage and Cattle Slurry Mixture

Nickel spiking to improve the methane yield of sewage sludge

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