Effect of Combined Inoculation on Biogas Production from Hardly Degradable Material

Achinas, Spyridon; Euverink, Gerrit Jan Willem

doi:10.3390/en12020217

Cited by 29 publications

(19 citation statements)

References 48 publications

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“…GB21-the amount of gas produced from 1 kg of dry organic matter (BSG), dm 3 The value of the reaction rate constant (k) was determined by the non-linear estimation of the experimental data (GB21) to the first order cumulative equation (Equation 4) according to [36][37][38][39][40]. Estimation of the best-fit parameters was carried out using the Statistica 12 software (StatSoft Polska, Krakow, Poland).…”

Section: Data Analysis-assessment Of Biogas Production Potentialmentioning

confidence: 99%

The Effect of Biochar Addition on the Biogas Production Kinetics from the Anaerobic Digestion of Brewers’ Spent Grain

et al. 2019

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Biochar (BC) addition is a novel and promising method for biogas yield increase. Brewer’s spent grain (BSG) is an abundant organic waste with a large potential for biogas production. In this research, for the first time, we test the feasibility of increasing biogas yield and rate from BSG digestion by adding BC, which was produced from BSG via torrefaction (low-temperature pyrolysis). Furthermore, we explore the digestion of BSG with the presence BCs produced from BSG via torrefaction (low-temperature pyrolysis). The proposed approach creates two alternative waste-to-energy and waste-to-carbon type utilization pathways for BSG: (1) digestion of BSG waste to produce biogas and (2) torrefaction of BSG to produce BC used for digestion. Torrefaction extended the short utility lifetime of BSG waste turned into BC. BSG was digested in the presence of BC with BC to BSG + BC weight ratio from 0 to 50%. The study was conducted during 21 days under mesophilic conditions in n = 3 trials. The content of dry mass 17.6% in all variants was constant. The kinetics results for pure BSG (0% BC) were: reaction rate constant (k) 1.535 d−1, maximum production of biogas (B0) 92.3 dm3∙kg−1d.o.m. (d.o.m. = dry organic matter), and biogas production rate (r), 103.1 dm3∙kg−1d.o.m.∙d−1. his preliminary research showed that the highest (p < 0.05) r, 227 dm3∙kg−1d.o.m.∙d−1 was due to the 5% BC addition. This production rate was significantly higher (p < 0.05) compared with all other treatments (0, 1, 3, 8, 10, 20, 30, and 50% BC dose). Due to the high variability observed between replicates, no significant differences could be detected between all the assays amended with BC and the variant 0% BC. However, a significant decrease of B0 from 85.1 to 61.0 dm3∙kg−1d.o.m. in variants with the high biochar addition (20–50% BC) was observed in relation to 5% BC (122 dm3∙kg−1d.o.m.), suggesting that BC overdose inhibits biogas production from the BSG + BC mixture. The reaction rate constant (k) was not improved by BC, and the addition of 10% and 20% BC even decreased k relatively to the 0% variant. A significant decrease of k was also observed for the doses of 10%, 20%, and 30% when compared with the 5% BC (1.89 d−1) assays.

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Section: Data Analysis-assessment Of Biogas Production Potentialmentioning

confidence: 99%

The Effect of Biochar Addition on the Biogas Production Kinetics from the Anaerobic Digestion of Brewers’ Spent Grain

et al. 2019

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“…This study continues the work of Achinas and Euverink [20] and focusses on the feasibility of combined inoculation through experimental tests and financial assessment. Cash flow analysis was performed to evaluate the viability of a biogas plant.…”

Section: Introductionmentioning

confidence: 76%

“…Chemical oxygen demand (g•kg −1 ) and ammonium (g•kg −1 ) were estimated using assay test kits (Hach Lange GmbH, Germany) and were quantified by a spectrophotometer (DR3900, Hach, Loveland, Colorado, USA). Free ammonia nitrogen (FAN; g•kg −1 ) was calculated based on the equation [31]: Euverink [20]. The methane content was determined with a micro gas chromatography (GC) device (single channel 2-stream selector system, Thermo Fisher Scientific Inc, Waltham, MA, USA) equipped with a chromatographic column (PLOT-U).…”

Section: Methodsmentioning

confidence: 99%

“…However, an alternative technique was recently reported for the improvement of AD performance. Co-inoculation with two or more inocula provides a vast and wide consortium of microorganism within the bioreactor [20]. The source of the microbial inoculum will influence the degradation efficiency, the bioreactor stability as well as the biogas yield and composition [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Feasibility Study of Biogas Production from Hardly Degradable Material in Co-Inoculated Bioreactor

Achinas

Euverink

2019

Energies

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Anaerobic technology is a well-established technique to wean the fossil fuel-based energy off with various positive environmental inferences. Biowaste treatment is favorable due to its low emissions. Biogas is merely regarded as the main product of anaerobic digestion with high energy value. One of the key concerns of the waste water treatment plants is the vast amount of cellulosic residuals produced after the treatment of waste waters. The fine sieve fraction, collected after the primary sludge removal, has great energy value. In this study, the economic performance of a biogas plant has been analyzed based on net present value and pay-back period concepts. The plant in the base scenario produced 309,571 m3 biogas per year. The annual electricity production has been 390,059 kWh. The producible heat energy has been 487,574 kWh or 1755 GJ per year. The plant depicts a positive economic situation with 11 years pay-back time, earning low profits and showing a positive net present value of 11,240 €.

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“…">Problem ContextThe problem context indicates a research interest in the sustainability of the biofuel production processes. Understanding the interrelation between the two is essential for the future of biofuels since it is its sustainability, both economically and environmentally, which has created greater attention for biofuels among the many other alternative energy sources [80][81][82][83][84][85][86][87][88][89][90]. Since the possibilities in production processes depend on the type of feedstock used in the processes, several feedstocks are taken into account [91][92][93][94].…”

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confidence: 99%

A PESTLE Analysis of Biofuels Energy Industry in Europe

et al. 2019

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Biofuels production is expected to be an intrinsic confluence to the renewable energy sector in the coming years under the European regulations for renewable energy. Key standpoints of the biofuels promotions are the reduction of national carbon emissions and rural deployment. Despite jubilant outlook of biofuels for sustainable development, research efforts still tend to link the biofuel industry and regional growth. The aim of this study is to explore and review the biofuels industry through a socio-political, techno-economic, legal and environmental (PESTLE) analysis approach, and discuss the interrelation between technological facets and sustainable deployment.

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Effect of Combined Inoculation on Biogas Production from Hardly Degradable Material

Cited by 29 publications

References 48 publications

The Effect of Biochar Addition on the Biogas Production Kinetics from the Anaerobic Digestion of Brewers’ Spent Grain

The Effect of Biochar Addition on the Biogas Production Kinetics from the Anaerobic Digestion of Brewers’ Spent Grain

Feasibility Study of Biogas Production from Hardly Degradable Material in Co-Inoculated Bioreactor

A PESTLE Analysis of Biofuels Energy Industry in Europe

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