scholarly journals Development of optimum substrate compositions in the methane fermentation process

2015 ◽  
Vol 29 (3) ◽  
pp. 313-321 ◽  
Author(s):  
Justyna Lalak ◽  
Agnieszka Kasprzycka ◽  
Ewelina M. Paprota ◽  
Jerzy Tys ◽  
Aleksandra Murat
Keyword(s):  
Organic Waste ◽  
Biogas Production ◽  
Chemical Parameters ◽  
Maize Silage ◽  
Methane Fermentation ◽  
Biogas Yield ◽  
Parameters Analysis ◽  
Agriculture And Food ◽  
Physical And Chemical ◽  
By Products

AbstractThe aim of the study was to assess the potential of organic wastes from the agriculture and food industry as co-substrate for biogas production, on the basis of physical and chemical parameters analysis and biogas yield in the process of methane fermentation. The experimental material consisted of carrot pomace, kale by-products and maize silage. Methane fermentation was conducted in bioreactors equipped with an automatic control and measurement system. The study indicated correct physicochemical properties in terms of high content of dry organic matter and also correct C/N ratio. That was reflected in high biogas yields which amounted to, respectively, 558 N dm3kg−1VS−1for carrot pomace and kale by-products, and 526 N dm3kg−1VS−1for maize silage. The study showed that the intensity of biogas production was varied and depended on the composition of fermented mixtures. Methane fermentation of organic waste mixtures significantly increased the amount of biogas efficiency compared to the fermentation of individual substrates. The successful run of the experiment indicates that a mixture composed of carrot pomace and kale by-products is a good substrate for the production of biogas.

scholarly journals Biogas potential of organic waste onboard cruise ships — a yet untapped energy source

2021 ◽  
Author(s):  
Kai Schumüller ◽  
Dirk Weichgrebe ◽  
Stephan Köster
Keyword(s):  
Energy Source ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Food Waste ◽  
Energy Demand ◽  
Organic Waste ◽  
Biogas Production ◽  
Biogas Yield ◽  
Cruise Ships ◽  
Detailed Presentation

AbstractTo tap the organic waste generated onboard cruise ships is a very promising approach to reduce their adverse impact on the maritime environment. Biogas produced by means of onboard anaerobic digestion offers a complementary energy source for ships’ operation. This report comprises a detailed presentation of the results gained from comprehensive investigations on the gas yield from onboard substrates such as food waste, sewage sludge and screening solids. Each person onboard generates a total average of about 9 kg of organic waste per day. The performed analyses of substrates and anaerobic digestion tests revealed an accumulated methane yield of around 159 L per person per day. The anaerobic co-digestion of sewage sludge and food waste (50:50 VS) emerged as particularly effective and led to an increased biogas yield by 24%, compared to the mono-fermentation. In the best case, onboard biogas production can provide an energetic output of 82 W/P, on average covering 3.3 to 4.1% of the total energy demand of a cruise ship.

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

2018 ◽  
Vol 44 ◽  
pp. 00114 ◽  
Author(s):  
Natalia Mioduszewska ◽  
Mariusz Adamski ◽  
Anna Smurzyńska ◽  
Jacek Przybył ◽  
Krzysztof Pilarski
Keyword(s):  
Sugar Beet ◽  
Storage Time ◽  
Fermentation Process ◽  
Biogas Production ◽  
Sugar Content ◽  
Storage Period ◽  
Methane Fermentation ◽  
Sugar Beets ◽  
Biogas Yield

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.

scholarly journals Effects of Co-substrates’ Mixing Ratios and Loading Rate Variations on Food and Agricultural Wastes’ Anaerobic co-digestion Performance

2020 ◽  
Author(s):  
Nour El houda Chaher ◽  
Nils Engler ◽  
Abdallah Nassour ◽  
Michael Nelles
Keyword(s):  
Organic Waste ◽  
Waste Treatment ◽  
Biogas Production ◽  
C:N Ratio ◽  
Closed Cycle ◽  
Mixture Ratio ◽  
Biogas Yield ◽  
Loading Rates ◽  
Mixing Ratios ◽  
The Relationship

Abstract Tunisia is one of the developing countries which faces crucial challenges, the most prominent of which are the production of organic waste, the need for an appropriate waste treatment, and the demand for water and energy conservation. To this end, the present research was designed to develop a technical concept on closed cycle ‘biowaste to bioenergy’ treating food waste (FW) through combined biological processes. In this approach, semi-continuous anaerobic co-digestion (ACoD) of FW, wheat straw (WS), and cattle manure (CM) was tested to investigate the relationship between the effect of the feedstock mixtures and C:N ratio on biogas and digestate generation at different organic loading rates (OLRs) ranging from 2 to 3.6 kg VS/m3.d. Results showed that the mono-digested FW was optimal and reached 565.5 LN/kg VSin at an OLR of 2.4 kg VS/m3.d, and then a drop of biogas production was recorded. However, for co-digested substrates, the optimum mixture ratio was FW:CM 75:25, where 62%, 39.89%, 91.26%, 130.9% and 119.97% of the biogas yield improved for OLRs ranging from 2 to 3.6 kg VS/m3. d, respectively. Admittedly, the target of this work was to enhance the ACoD process, but it also examined the exploitation of different AD-effluents. Therefore, special attention was paid to the generated digestates to decide how it can be efficiently upcycled later. Thus, the closed cycle ‘biowaste to bioenergy’ treatment met two of the major Tunisian concerns: efficient organic waste management as well as sustainable bioenergy production.

scholarly journals Larvae Mediated Valorization of Industrial, Agriculture and Food Wastes: Biorefinery Concept through Bioconversion, Processes, Procedures, and Products

Processes ◽  
2020 ◽  
Vol 8 (7) ◽  
pp. 857
Author(s):  
Harish Karthikeyan Ravi ◽  
Antoine Degrou ◽  
Jérôme Costil ◽  
Christophe Trespeuch ◽  
Farid Chemat ◽  
...  
Keyword(s):  
Food Industry ◽  
Organic Waste ◽  
Agricultural Waste ◽  
Food Wastes ◽  
Waste Biomass ◽  
Viable Option ◽  
Primary Metabolites ◽  
The World ◽  
Agriculture And Food ◽  
By Products

Each year, the food supply chain produces more than 1.3 billion tons of food and agricultural waste, which poses serious environmental problems. The loss of the massive quantity of secondary and primary metabolites retrievable from this resource is a significant concern. What if there is a global solution that caters to the numerous problems arising due to the humongous volume of waste biomass generated in every part of the world? Insects, the tiny creatures that thrive in decaying organic matter, which can concentrate the nutrients present in dilute quantities in a variety of by-products, are an economically viable option. The bioconversion and nutritional upcycling of waste biomass with insects yield high-value products such as protein, lipids, chitin and frass. Insect-derived proteins can replace conventional protein sources in feed formulations. Notably, the ability of the black soldier fly (BSF) or Hermetia illucens to grow on diverse substrates such as agri-food industry side streams and other organic waste proves advantageous. However, the data on industrial-scale extraction, fractionation techniques and biorefinery schemes for screening the nutritional potential of BSF are scarce. This review attempts to break down every facet of insect processing and analyze the processing methods of BSF, and the functional properties of nutrients obtained thereof.

scholarly journals Effects of co-substrates’ mixing ratios and loading rate variations on food and agricultural wastes’ anaerobic co-digestion performance

2021 ◽  
Author(s):  
Nour El Houda Chaher ◽  
Nils Engler ◽  
Abdallah Nassour ◽  
Michael Nelles
Keyword(s):  
Organic Waste ◽  
Waste Treatment ◽  
Biogas Production ◽  
C:N Ratio ◽  
Closed Cycle ◽  
Mixture Ratio ◽  
Biogas Yield ◽  
Loading Rates ◽  
Mixing Ratios ◽  
The Relationship

AbstractTunisia is one of the developing countries which faces crucial challenges, the most prominent of which are the production of organic waste, the need for an appropriate waste treatment, and the demand for water and energy conservation. To this end, the present research was designed to develop a technical concept on closed cycle “biowaste to bioenergy” treating food waste (FW) through combined biological processes. In this approach, semi-continuous anaerobic co-digestion (ACoD) of FW, wheat straw (WS), and cattle manure (CM) was tested to investigate the relationship between the effect of the feedstock mixtures and C:N ratio on biogas and digestate generation at different organic loading rates (OLRs) ranging from 2 to 3.6 kg VS/m3.d. Results showed that the mono-digested FW was optimal and reached 565.5 LN/kg VSin at an OLR of 2.4 kg VS/m3.d, and then a drop of biogas production was recorded. However, for co-digested substrates, the optimum mixture ratio was FW:CM 75:25, where 62%, 39.89%, 91.26%, 130.9%, and 119.97% of the biogas yield improved for OLRs ranging from 2 to 3.6 kg VS/m3.d, respectively. Admittedly, the target of this work was to enhance the ACoD process, but it also examined the exploitation of different AD effluents. Therefore, special attention was paid to the generated digestates to decide how it can be efficiently upcycled later. Thus, the closed cycle “biowaste to bioenergy” treatment met two of the major Tunisian concerns: efficient organic waste management and sustainable bioenergy production.

scholarly journals Incidence of operative parameters in the production of biohydrogen generated from urban organic waste

2019 ◽  
Vol 72 (2) ◽  
pp. 8841-8853
Author(s):  
Edilson León Moreno-Cárdenas ◽  
Deisy Yuliana Cano Quintero
Keyword(s):  
Hydrogen Content ◽  
Numerical Optimization ◽  
Organic Waste ◽  
Chemical Parameters ◽  
Daily Production ◽  
Production Of Hydrogen ◽  
Dependent Variables ◽  
Cumulative Production ◽  
Food Market ◽  
Physical And Chemical

Organic waste is considered a substrate of great interest to produce biohydrogen. In the present work, the influence of some physical and chemical parameters in the operation of a bioreactor for biohydrogen generation were studied, taking as a substrate organic residue from a wholesale food market without adding inoculum. Therefore, an experimental design of central composition was made, with four factors and two levels. The dependent variables were maximum hydrogen content (% of H2), daily production of hydrogen (L H2 d-1) and its cumulative production (L H2). The independent variables were operation pH (pHo), pH of acidification (pHa), the duration time of the acidification stage, and stirring. A numerical optimization was carried out, allowing the prioritization of the factors, and maximizing the response variables. Resulting in a yield of up to 14.9 L H2 d-1, a hydrogen content of 49.2% and a cumulative production of 21.6 L H2, for pHa values of 4.9; pHo between 6 and 6.1; acidification time of 2 d and stirring of 41.4 rpm. Likewise, a graphical optimization was carried out, reaching 14.9 L H2 d-1, a hydrogen content of 44.2% and an accumulated 22.8 L H2, for pHa values between 4.5 and 4.95; pHo between 5.6 and 6.3; acidification time of 2 d, and stirring of 37.1 rpm. Maximum yields were 1.9 L H2 Lwaste.day-1, 4800 mL H2 gCOD-1, and 608.6 mL H2 gTVSadded-1, values similar to those reported by other authors using organic waste in the production of hydrogen, using inoculum.

scholarly journals The Effect of Electromagnetic Microwave Radiation on Methane Fermentation of Selected Energy Crop Species

Processes ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 45
Author(s):  
Marcin Zieliński ◽  
Marcin Dębowski ◽  
Joanna Kazimierowicz
Keyword(s):  
Microwave Radiation ◽  
Biogas Production ◽  
Production Capacity ◽  
Energy Crop ◽  
Maize Silage ◽  
Methane Fermentation ◽  
Crop Species ◽  
Anaerobic Reactors ◽  
Biomethane Production ◽  
Methane Concentrations

The aim of the present study was to determine how thermal stimulation via electromagnetic microwave radiation impacts the yields of biogas and methane produced by methane fermentation of five selected energy crop species in anaerobic reactors. The resultant performance was compared with that of reactors with conventional temperature control. The highest biogas production capacity was achieved for maize silage and Virginia mallow silage (i.e., 680 ± 28 dm3N/kgVS and 506 ± 16 dm3N/kgVS, respectively). Microwave radiation as a method of heating anaerobic reactors provided a statistically-significantly boost in methane production from maize silage (18% increase). Biomethane production from maize silage rose from 361 ± 12 dm3N/kgVS to 426 ± 14 dm3N/kgVS. In the other experimental variants, the differences between methane concentrations in the biogas were non-significant.

scholarly journals Antioxidant activity of plant extracts and their effect on methane fermentation in bioreactors

2018 ◽  
Vol 32 (3) ◽  
pp. 395-401 ◽  
Author(s):  
Marta Oleszek ◽  
Solomiia Kozachok
Keyword(s):  
Antioxidant Activity ◽  
Production Efficiency ◽  
Biogas Production ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Antioxidant Compounds ◽  
Methane Fermentation ◽  
Biogas Yield

Abstract Extracts of Solidago virgaurea L. (European goldenrod), Lavandula angustifolia Mill. (lavender) and Arnica chamissonis Less. (arnica) were tested as potential additives for methane fermentation in bioreactors, as it was hypothesized that their antioxidant properties may improve biogas production efficiency. Hence, methane fermentation of maize silage with the addition of tested extracts was performed in eudiometers, and both the biogas volume and methane content in biogas were measured. In addition, antioxidant properties, such as reducing power and 1,1-diphenyl-2-picrylhydrazyl free radical-scavenging activity, were determined spectrophotometrically. The results showed that only the addition of a goldenrod crude extract caused a significant increase in biogas yield, despite the fact that it presented the lowest antioxidant activity of the three tested species. No significant differences in biogas yield were found between the other two additives and the control. Biogas production efficiency was not correlated with the antioxidant activity of the crude extracts. Hence, the increase in methane fermentation efficiency in the case of goldenrod supplementation might have resulted from some other non-antioxidant compounds occurring in this species.

scholarly journals Variation in the Distribution of Hydrogen Producers from the Clostridiales Order in Biogas Reactors Depending on Different Input Substrates

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3270 ◽  
Author(s):  
Martin Černý ◽  
Monika Vítězová ◽  
Tomáš Vítěz ◽  
Milan Bartoš ◽  
Ivan Kushkevych
Keyword(s):  
Organic Waste ◽  
Biogas Production ◽  
Clean Energy ◽  
Microbial Consortia ◽  
Organic Substrates ◽  
Clostridium Septicum ◽  
Biogas Yield ◽  
Anaerobic Microorganisms ◽  
Clostridium Novyi ◽  
Biogas Reactors

With growing demand for clean and cheap energy resources, biogas production is emerging as an ideal solution, as it provides relatively cheap and clean energy, while also tackling the problematic production of excessive organic waste from crops and animal agriculture. Behind this process stands a variety of anaerobic microorganisms, which turn organic substrates into valuable biogas. The biogas itself is a mixture of gases, produced mostly as metabolic byproducts of the microorganisms, such as methane, hydrogen, or carbon dioxide. Hydrogen itself figures as a potent bio-fuel, however in many bioreactors it serves as the main substrate of methanogenesis, thus potentially limiting biogas yield. With help of modern sequencing techniques, we tried to evaluate the composition in eight bioreactors using different input materials, showing shifts in the microbial consortia depending on the substrate itself. In this paper, we provide insight on the occurrence of potentially harmful microorganisms such as Clostridium novyi and Clostridium septicum, as well as key genera in hydrogen production, such as Clostridium stercorarium, Mobilitalea sp., Herbinix sp., Herbivorax sp., and Acetivibrio sp.

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