scholarly journals Net Electricity and Heat Generated by Reusing Mediterranean Agro-Industrial By-Products

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 470 ◽  
Author(s):  
Francesca Valenti ◽  
Simona Porto
Keyword(s):  
Anaerobic Digestion ◽  
Agricultural Sector ◽  
Biogas Production ◽  
Software Tool ◽  
Geographical Information ◽  
The European Union ◽  
Olive Pomace ◽  
Renewable Energy Resources ◽  
Citrus Pulp ◽  
By Products

The necessity to investigate suitable alternatives to conventional fossil fuels has increased interest in several renewable energy resources, especially in biomasses that are widely available and make it possible to reach environmental and socio-economic improvements. Among solutions for bioenergy production, anaerobic digestion technology allows biogas production by reusing agricultural residues and agro-industrial by-products. By considering the basic concepts of the Biogasdoneright® method, the objective of this study was to estimate the theoretical potential net electricity and heat production from anaerobic digestion of citrus pulp and olive pomace highly available worldwide. A model was developed and applied in a study area of the Mediterranean basin, where the biogas sector is still very limited despite the importance of both agricultural and agro-industrial activities, especially with regard to citrus and olive cultivation processing. Firstly, the application of a geographical information system (GIS) software tool allowed the estimation of the biogas potentially produced from citrus pulp and olive pomace re-use. Then, the development of a technical assessment demonstrated that 15.9 GWh electricity and 88,000 GJ heat per year could be generated from these by-products, satisfying approximate 17% of the electricity demand of the agricultural sector of the study area (90.2 GWh y−1). The achieved results could be relevant with regard to the intervention priorities established by the European Union related to the planning activities supported by the European Structural and Investment Funds within the Smart Specialisation Strategy.

scholarly journals Potential Energy Production from Citrus Pulp and Olive Pomace: A Case Study in a Region of Mediterranean Basin

2018 ◽  
Author(s):  
Francesca Valenti ◽  
Simona M.C. Porto ◽  
Paolo Lanteri ◽  
Claudia Arcidiacono
Keyword(s):  
Fossil Fuels ◽  
Agricultural Sector ◽  
Biogas Production ◽  
Olive Pomace ◽  
Citrus Pulp ◽  
Biomass Resources ◽  
Biogas Plants ◽  
Olive Cultivation ◽  
Suitable Area ◽  
By Products

The necessity to investigate suitable alternatives to conventional fossil fuels has developed the interests in many renewable energy alternatives, especially biomass resources which are widely available and allow to reach both environmental and socio-economic improvements. Among the bioenergy solutions the anaerobic digestion technology makes it possible to produce biogas by reusing and valorising agricultural residues and by-products. In Southern Italy, to date, the development of biogas sector is still very limited, despite the importance of the agricultural sector, especially of citrus and olive cultivation. For this reason, in previous studies the availability of two by-products, i.e., citrus pulp and olive pomace, was analysed in order to choose the most suitable area for a sustainable development of new biogas plants according to the new Biogasdoneright concept. In this paper, after a resume of the multi-step methodology which allowed the computation of biogas production, it was demonstrated that 15.9 GWh-e electricity and 24.5 GWh-e heat per year could be generate by reusing only these two kind of by-products, and could satisfy approximate 17% of the total electricity demand of the agricultural sector (90.2 GWh-e/year) in Catania.

scholarly journals Potential biogas production from agricultural by-products in Sicily: a case study of citrus pulp and olive pomace

2017 ◽  
Vol 48 ◽  
Author(s):  
Francesca Valenti ◽  
Simona Porto ◽  
Giovanni Cascone ◽  
Claudia Arcidiacono
Keyword(s):  
Spatial Distribution ◽  
Biogas Production ◽  
Renewable Energy Sources ◽  
Geographical Area ◽  
Olive Pomace ◽  
Suitable Alternative ◽  
Impact Reduction ◽  
Citrus Pulp ◽  
By Products

Renewable energy sources represent a suitable alternative to conventional fossil fuels, due to the possible advantages in terms of environmental impact reduction. Anaerobic digestion of biomasses could be considered an environmental friendly way to treat and revalorise large amounts of by-products from farming industries because it ensures both pollution control and energy recovery. Therefore, the objective of this study was to define a methodology for evaluating the potential biogas production available from citrus pulp and olive pomace, which are suitable agricultural by-products for biogas production. In the first phase of the study, the spatial distribution of both olive and citrus-producing areas was analysed in Sicily, a geographical area of the Mediterranean basin highly representative of these types of cultivation. Then, a GIS-based model, which had been previously defined and utilised to evaluate the amount of citrus pulp and olive pomace production, was applied to this case study. Based on the results obtained for the different provinces of Sicily, the province of Catania was chosen as the study area of this work since it showed the highest production of both citrus pulp and olive pomace. Therefore, a further analysis regarded the quantification of olive pomace and citrus pulp at municipal level. The results of this analysis showed that the total amount of available citrus pulp and olive pomace corresponded theoretically to about 11,102,469 Nm3/year biogas. Finally, the methodology adopted in this study made it possible to identify suitable areas for the development of new biogas plants by considering both the spatial distribution of the olive and citrus growing areas and the locations of the existing processing industries.

Effect of char addition on anaerobic digestion of animal by-products: evaluating biogas production and process performance

2020 ◽  
Vol 27 (19) ◽  
pp. 24387-24399 ◽  
Author(s):  
Cristian Bernabé Arenas ◽  
William Meredith ◽  
Collin Edward Snape ◽  
Xiomar Gómez ◽  
José Francisco González ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Process Performance ◽  
By Products

scholarly journals IMPROVEMENT OF BIOGAS PRODUCTION IN ANAEROBIC DIGESTION PROCESS

2021 ◽  
Vol 2021 (2/2021) ◽  
pp. 26-31
Author(s):  
Abdelhani Chaabna ◽  
Samia Semcheddine
Keyword(s):  
Anaerobic Digestion ◽  
Rural Areas ◽  
Control Method ◽  
Sliding Mode ◽  
Biogas Production ◽  
Control Design ◽  
Control Law ◽  
Renewable Energy Resources ◽  
Environmental Preservation ◽  
Linear Technique

The production of biogas enables environmental preservation and sustainable development of rural areas and landlocked regions, as well as diversification of renewable energy resources. This paper is a contribution to improving the production of biogas by Sliding Mode Control (SMC). In the literature there are many models describing the behaviour of reactions during anaerobic digestion and used for control design. The AM2 model is one of the simplest models and can be exploited easily for the control design purposes. In this paper, the reduced model AM2 was exploited to develop and testing by simulations the robust control law SMC. The results obtained have proved the effectiveness of the control method proposed in this paper. A study of the robustness for monitoring and disturbances rejection demonstrated the great interest of this method, which is a non-linear technique and gives very good results in terms of robustness but it presents the problem of chattering. In practice, the chattering of the control action can cause premature wear of the actuators or parts of the system due to heavy oscillations. The chattering phenomenon is caused by the discontinuous term which appears in the control signal. This paper presents a solution to the chattering problem by replacing the discontinuous term with a continuous one. Different Simulations and comparisons are presented and interpreted with satisfactory results.

scholarly journals A Real Case Study of a Full-Scale Anaerobic Digestion Plant Powered by Olive By-Products

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1946
Author(s):  
Antonia Tamborrino ◽  
Filippo Catalano ◽  
Alessandro Leone ◽  
Biagio Bianchi
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Storage Conditions ◽  
Methanogenic Bacteria ◽  
Full Scale ◽  
Specific Production ◽  
Production Values ◽  
Volatile Solids ◽  
Olive Pulp ◽  
By Products

The anaerobic digestion plant studied in this paper is one of the first full-scale plants using olive oil by-products. This is a two-stage plant with a power of 100 kWe. Two tests were performed: the first on olive pulp and pitted pomace and the second on biomass consisting of 10% crushed cereal. In both cycles, the retention time was 40 days. The production of biogas was between 51 and 52 m3/h, with limited fluctuations. The specific production values of biogas indicate that a volume of biogas greater than 1 m3/kg was produced in both tests. The produced biogas had a methane percentage of about 60% and the specific production (over total volatile solids, TVS) of methane was of the order of 0.70 m3methane/kgTVS. FOS/Alk (ratio between volatile organic acids and alkalinity) was always lower than 1 and tended to decrease in the second digester, indicating a stable methanogenic phase and the proper working of the methanogenic bacteria in the second reactor. The concentration of incoming biomass TPC (total polyphenols content) can vary significantly, due to the seasonality of production or inadequate storage conditions, but all measured values of TPC, between 1840 and 3040 mg gallic acid kg−1, are considered toxic both for acidogenic and methanogenic bacteria. By contrast, during the process the polyphenols decreased to the minimum value at the end of the acidogenic phase, biogas production did not stop, and the methane percentage was high.

scholarly journals Recent Updates on the Use of Agro-Food Waste for Biogas Production

2019 ◽  
Vol 9 (6) ◽  
pp. 1217 ◽  
Author(s):  
Marisa Caruso ◽  
Ada Braghieri ◽  
Angela Capece ◽  
Fabio Napolitano ◽  
Patrizia Romano ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Food Waste ◽  
Agricultural Sector ◽  
Genetic Manipulation ◽  
Biogas Production ◽  
Anaerobic Bacteria ◽  
Operating Conditions ◽  
Process Conditions ◽  
The European Union ◽  
Biogas Yield

The production of biogas from anaerobic digestion (AD) of residual agro-food biomasses represents an opportunity for alternative production of energy from renewable sources, according to the European Union legislation on renewable energy. This review provides an overview of the various aspects involved in this process with a focus on the best process conditions to be used for AD-based biogas production from residual agro-food biomasses. After a schematic description of the AD phases, the biogas plants with advanced technologies were described, pointing out the strengths and the weaknesses of the different digester technologies and indicating the main parameters and operating conditions to be monitored. Subsequently, a brief analysis of the factors affecting methane yield from manure AD was conducted and the AD of fruit and vegetables waste was examined. Particular attention was given to studies on co-digestion and pre-treatments as strategies to improve biogas yield. Finally, the selection of specific microorganisms and the genetic manipulation of anaerobic bacteria to speed up the AD process was illustrated. The open challenges concern the achievement of the highest renewable energy yields reusing agro-food waste with the lowest environmental impact and an increment of competitiveness of the agricultural sector in the perspective of a circular economy.

scholarly journals Evaluation of Green Coffee-Roasting Biogas with Modeling Valorization of Possible Solutions

2020 ◽  
Vol 17 (19) ◽  
pp. 6947
Author(s):  
Giuseppe Campo ◽  
Alberto Cerutti ◽  
Marco Ravina ◽  
Deborah Panepinto ◽  
Vincenzo A. Riggio ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Energy Production ◽  
Energy Use ◽  
Biogas Production ◽  
Primary Energy ◽  
Point Of View ◽  
The European Union ◽  
Environmentally Sustainable ◽  
Valid Solution ◽  
Coffee Roasting

According to the European Union Directive 2009/28/EC, the goals of obtaining 20% of all energy requirements from renewable sources and a 20% reduction in primary energy use must be fulfilled by 2020. In this work, an evaluation was performed, from the environmental and energy point of view, of anaerobic digestion as a valid solution for the treatment of the byproducts obtained from the coffee-roasting process. In particular, thermophilic anaerobic digestion tests were carried out. Output values from the laboratory were used as input for the MCBioCH4 model to evaluate the produced flow of biogas and biomethane and two different biogas valorization alternatives, namely, the traditional exploitation of biogas for heat/energy production and biomethane conversion. The results of the preliminary simulation showed that a full-scale implementation of the coffee waste biogas production process is technically feasible and environmentally sustainable. Furthermore, the performed analysis validates a general methodology for energy production compatibility planning.

scholarly journals A Review Regarding the Biogas Production through Anaerobic Digestion of Organic Waste

2015 ◽  
Vol 13 ◽  
pp. 185-193 ◽  
Author(s):  
Gheorghe Voicu ◽  
Mirela Dincă ◽  
Gigel Paraschiv ◽  
Georgiana Moiceanu
Keyword(s):  
Renewable Energy ◽  
Anaerobic Digestion ◽  
Organic Waste ◽  
Biogas Production ◽  
Pollution Prevention ◽  
Economic Benefits ◽  
Green Paper ◽  
The European Union ◽  
Sustainable Solutions ◽  
Biogas Plants

Globally, the pollution prevention goals transposed in the Kyoto Protocol, require sustainable solutions regarding the management of organic waste from both agricultural, and livestock farms. Biogas production by anaerobic digestion of organic wastes and residues provides a range of socio-economic benefits, but also environmental, thus contributing to monitoring the complex relationship between human health and the environment. The European Union policies regarding renewable energy systems (Europe 2020 Strategy – A strategy for smart, sustainable and inclusive growth and Green Paper „Towards a European strategy for the security of energy supply“), highlights that the production of renewable energy, reducing greenhouse gas emissions and a sustainable waste management, are essential for sustainable development in the future. In this context, this paper will review aspects of biogas production by anaerobic digestion of organic waste, stages of anaerobic digestion process and concepts of biogas plants used in European countries.

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