Modeling the Investment Evaluation Process in Biogas-Based Distributed Generation Projects for Sustainable Development Pedro Alberto Chaib de Sousa Bernardes, Giancarlo Aquila, André Luiz Medeiros, Edson de Oliveira Pamplona, Paulo Rotella Junior, Luiz Célio Souza Rocha Sustainability Switzerland, 2025 Distributed generation (DG) is one of the types of generation with great potential in the world and fits into the incentive schemes used worldwide. In addition, biogas as a fuel for DG presents itself as an interesting option, both from an economic and a sustainability point of view. Thus, this article addresses the modeling of the investment evaluation process in biogas-based DG projects in Brazil, using the Business Process Model and Notation (BPMN) and Decision Model and Notation (DMN) techniques, intending to define a standard model. Although the study is applied to the Brazilian scenario, the proposed investment evaluation model can be applied to any scenario as long as the specificities of each location or country analyzed are considered. The results show that the model supports decisions on new investments in the sector and highlights the process sequence and main decision points for quality analysis. In addition, the model highlights the need to know the regulations and incentives for DG using renewable energy sources (RES) in the country, shows the available technologies, the process for producing electricity using biogas, the times for collecting operational data, estimating revenues, and investment evaluation methodologies, and promotes the growth of knowledge about RES. Finally, this approach supports sustainable development by using renewable resources efficiently, reducing waste, and lowering greenhouse gas emissions. It also helps investors and policymakers make decisions about low-carbon energy systems.
Optimized Chitosan Extraction From Shrimp Waste for Edible Coating: Enhancing the Shelf Life of Maçaranduba (Manilkara triflora) Lindoval Serrano da Fonseca, Luiz Célio Souza Rocha, Carlos Eduardo Vasconcelos de Oliveira, Ingrid Luana Nicácio de Oliveira, Maiara da Costa Lima, Paulo Rotella Junior, Maria Cristina Basílio Crispim da Silva Journal of Food Processing and Preservation, 2025 Maçaranduba is a fruit native to Northeast Brazil, yet it remains relatively unknown due to its short shelf life, which limits its commercialization and distribution to distant markets. Extending the fruit’s longevity through sustainable preservation methods, such as edible coatings, can enhance its market potential. Meanwhile, shrimp farming is a significant economic activity in the Brazilian Northeast, generating large amounts of waste that, if not correctly managed, contribute to environmental pollution. One sustainable approach to mitigate this issue is the extraction of chitosan, a biopolymer derived from shrimp residues, which has demonstrated the potential to extend the shelf life of perishable fruits. This study is aimed at optimizing chitosan extraction from shrimp residues and evaluating its effectiveness as a coating for Maçaranduba fruits. The extraction process was optimized using response surface methodology (RSM) combined with the normal boundary intersection (NBI) approach, specifically focusing on enhancing yield and purity. The obtained chitosan, with a yield of 3.637 g/100 g and a purity of 84.584%, was then applied as a coating to Maçaranduba fruits, and its effects on shelf life were assessed through physicochemical analyses. The results demonstrated that the chitosan coating significantly improved key quality parameters, including reduced water activity, pH stabilization, lower mass loss, and decreased soluble solids variation. These findings highlight the potential of shrimp‐derived chitosan as an eco‐friendly and effective solution for fruit preservation. Furthermore, promoting the sustainable utilization of shrimp waste aligns with circular economy principles, reducing environmental impact while adding value to the aquaculture and agricultural sectors.
Economic Feasibility of Biogas Microgeneration from Food Waste: Potential for Sustainable Energy in Northeastern Brazil Iván D. Roa, Jorge R. Henriquez, Emmanuel D. Dutra, Rômulo S. C. Menezes, Monaliza M. M. Andrade, Edvaldo P. Santos Junior, Luiz Célio S. Rocha, Paulo Rotella Junior Sustainability Switzerland, 2024 This study evaluates three scenarios’ technical and economic viability for implementing a microgeneration power plant using biogas derived from the anaerobic digestion of food waste. The case study focuses on the Federal University of Pernambuco (UFPE) campus in Recife, northeastern (NE) Brazil, targeting the organic fraction of solid waste from food units (restaurants, canteens, and kiosks). The analysis was based on field data, the chemical composition of the waste, and the electric energy consumption. Biogas production of 166 m3/day from 1 ton/day of food waste was estimated using an anaerobic reactor of 126 m3. This amount of biogas could generate about 360 kWh/day of electricity if the plant operates at peak hours using a generator set with an alternative internal combustion engine of 120 kW, with a consumption of 66 m3/h and fuel efficiency of 30%. The system could generate 390 kWh/day of electrical energy using a microturbine, with a consumption of 78 m3/h and 30% efficiency. The scenario utilizing a tubular reactor and an internal combustion engine demonstrated the best economic viability. While this study focuses on financial aspects, the findings suggest significant potential contributions to sustainability, including reducing greenhouse gas (GHG) emissions and advancing renewable energy solutions. This model can be adapted for small NE Brazil municipalities, offering economic and environmental benefits.
Decommissioning of a fuel oil-fired thermoelectric power plant in Brazil - Economic feasibility under certain and risk conditions Amadeu Junior da Silva Fonseca, Roberto Castro, Dorel Soares Ramos, João Carlos de Oliveira Mello, Luiz Célio Souza Rocha, Camila Seibel Gehrke, Edvaldo Pereira Santos Júnior, Wilton Lima Sousa, Luiz Moreira Coelho Junior Sustainable Futures, 2024 • Deterministic and stochastic economic analysis of the demobilization process. • Even in the face of uncertainty, shareholders can expect a financial profit. • Policies must be aligned with the transition to renewable energy sources in Brazil. The strategic analysis for the decommissioning of thermoelectric plants is seen as a trend for the coming years. The search for renewable alternatives should stimulate investment in other energy sources, reducing the number of thermoelectric plants in the energy generation system. However, few studies have dealt with the decommissioning of oil-fired thermoelectric plants. In this work, the methodology was applied under deterministic and stochastic conditions using methods of net present value (NPV), internal rate of return (IRR), discounted payback, capital asset pricing model (CAPM) and weighted average cost of capital (WACC). The results showed that the deterministic NPV was positive, ranging from R$101.30 million (pessimistic scenario) to R$109.73 million (optimistic scenario). The IRR was higher than the WACC of 10.55%, ranging from 13.50% to 13.68% per year. For the Monte Carlo simulation, NPV was observed with 100% certainty of viability and the probabilities of occurrence allowed more analysis of the risks involved than those obtained by deterministic methods. this study contributes to future decommissioning projects in Brazil, considering the scenario of stimulating renewable sources and the energy transition, helping managers make decisions about their projects. In addition, it helps guide public policies that can optimize the decommissioning process and strengthen the national energy sector.
Taxation and energy policy: Comparing financial levelized cost of energy and net present value in Brazil's photovoltaic market EOP Coelho, G Aquila, VM de Miranda, RLM Mota, B Bonatto, ... Energy Sources, Part B: Economics, Planning, and Policy 21 (1), 2675411 , 2026 2026
Technological routes for end-of-life photovoltaic panels: a systematic review from a circular economy and energy systems perspective JA Vieira, PR Junior, SN Morioka, LCS Rocha Applied Energy 411, 127587 , 2026 2026 Citations: 1
Optimizing investment strategies for biogas-solar photovoltaic microgeneration: a multi-objective approach PAC de Sousa Bernardes, G Aquila, E de Oliveira Pamplona, PR Junior, ... Renewable Energy Focus 56, 100787 , 2026 2026 Citations: 2
A Stochastic Multivariate Framework Using Confidence Ellipses for Economic and Environmental Assessment of Solar PV Investments VAM de Miranda, G Aquila, E de Oliveira Pamplona, ... Energy, 140131 , 2026 2026 Citations: 1
Stochastic multi-objective optimization of hybrid distributed power generation with battery storage systems AM Barbosa, P Rotella Junior, RS Peruchi, LCS Rocha, ALG Pires, ... Energy Sources, Part B: Economics, Planning, and Policy 20 (1), 2504487 , 2025 2025 Citations: 6
Índice de Qualidade do Leite: proposta de um indicador multivariado para classificação de fornecedores R dos Santos Falcão Filho, LCS Rocha, FAS da Silva, ÍVUM Veras Revista de Ciência de Alimentos e Gastronomia 3 (3) , 2025 2025
Modeling the Investment Evaluation Process in Biogas-Based Distributed Generation Projects for Sustainable Development PACS Bernardes, G Aquila, AL Medeiros, EO Pamplona, P Rotella Junior, ... Sustainability 17 (23), 10797 , 2025 2025
Evolução histórica dos Microempreendedores Individuais (MEI) no Baixo Vale do Jequitinhonha/MG: perfil dos empreendedores (2009-2022) BA Rocha, ALR Novais, LCS Rocha, EA Pelogio Recital-Revista de Educação, Ciência e Tecnologia de Almenara/MG 7 (2), 332-349 , 2025 2025
Optimizing hybrid systems and energy storage: Self-sufficiency and economic viability under metering policy changes ALG Pires, R de Carvalho Miranda, PR Junior, LCS Rocha, ... Energy, 138258 , 2025 2025 Citations: 2
Modeling the Investment Evaluation Process in Biogas-Based Distributed Generation Projects for Sustainable Development PAC de Sousa Bernardes, G Aquila, AL Medeiros, ... Sustainability 17 (23), 1-28 , 2025 2025
Optimized Chitosan Extraction From Shrimp Waste for Edible Coating: Enhancing the Shelf Life of Maçaranduba ( Manilkara triflora ) LS Da Fonseca, LCS Rocha, CEV De Oliveira, ILN De Oliveira, ... Journal of Food Processing and Preservation 2025 (1), 6671683 , 2025 2025
Decommissioning of a fuel oil-fired thermoelectric power plant in Brazil-Economic feasibility under certain and risk conditions AJ da Silva Fonseca, R Castro, DS Ramos, JC de Oliveira Mello, ... Sustainable Futures 8, 100332 , 2024 2024 Citations: 3
Economic Feasibility of Biogas Microgeneration from Food Waste: Potential for Sustainable Energy in Northeastern Brazil ID Roa, JR Henriquez, ED Dutra, RSC Menezes, MMM Andrade, ... Sustainability 16 (23), 10238 , 2024 2024 Citations: 8
Net metering rolling credits vs. net billing buyback: An economic analysis of a policy option proposal for photovoltaic prosumers G Aquila, PR Junior, LCS Rocha, PP Balestrassi, E de Oliveira Pamplona, ... Renewable Energy 232, 121154 , 2024 2024 Citations: 21
Optimization methods of distributed hybrid power systems with battery storage system: A systematic review AM Barbosa, PR Junior, LCS Rocha, A de Souza Barbosa, I Bolis Journal of Energy Storage 97, 112909 , 2024 2024 Citations: 36
Energy and stochastic economic assessment for distributed power generation from Manipueira biogas DS Oliveira, GC Gomes, LCS Rocha, P Rotella Junior, G Aquila, ... Environmental Technology 45 (8), 1608-1621 , 2024 2024 Citations: 8
Explorando horizontes: percepções dos concluintes sobre o mundo do trabalho, a instituição e seus objetivos futuros BA Rocha, LCS Rocha, RS Lopes Recital-Revista de Educação, Ciência e Tecnologia de Almenara/MG 6 (2), 97-117 , 2024 2024
Robust portfolio optimization: a stochastic evaluation of worst-case scenarios P Rotella Junior, LC Souza Rocha, RS Peruchi, G Aquila, EO Pamplona, ... Economic research-Ekonomska istraživanja 36 (3) , 2023 2023 Citations: 5
Stochastic financial analysis of diesel generation extension vs investment in hybrid photovoltaic-diesel-battery in a microgrid in the Amazon indigenous community EOP Coelho, G Aquila, BD Bonatto, WT Nakamura, PR Junior, ... Energy for Sustainable Development 77, 101344 , 2023 2023 Citations: 13
Impacts of economic regulation on photovoltaic distributed generation with battery energy storage systems GND de Doile, PR Junior, LCS Rocha, K Janda, R Peruchi, G Aquila, ... Journal of Energy Storage 72, 108382 , 2023 2023 Citations: 33
MOST CITED SCHOLAR PUBLICATIONS
Economic analysis of the investments in battery energy storage systems: Review and current perspectives P Rotella Junior, LCS Rocha, SN Morioka, I Bolis, G Chicco, A Mazza, ... Energies 14 (9), 2503 , 2021 2021 Citations: 104
Wind power generation: an impact analysis of incentive strategies for cleaner energy provision in Brazil G Aquila, LCS Rocha, PR Junior, E de Oliveira Pamplona, AR de Queiroz, ... Journal of Cleaner Production 137, 1100-1108 , 2016 2016 Citations: 81
Photovoltaic electricity production in Brazil: A stochastic economic viability analysis for small systems in the face of net metering and tax incentives LCS Rocha, G Aquila, E de Oliveira Pamplona, AP de Paiva, ... Journal of Cleaner Production 168, 1448-1462 , 2017 2017 Citations: 77
Enterprise project governance: a guide to the successful management of projects across the organization PC Dinsmore, L Rocha Amacom , 2012 2012 Citations: 69
Multiobjective optimization of hybrid wind-photovoltaic plants with battery energy storage system: Current situation and possible regulatory changes LCS Rocha, PR Junior, G Aquila, A Maheri Journal of Energy Storage 51, 104467 , 2022 2022 Citations: 57
A stochastic economic viability analysis of residential wind power generation in Brazil LCS Rocha, G Aquila, PR Junior, AP de Paiva, E de Oliveira Pamplona, ... Renewable and Sustainable Energy Reviews 90, 412-419 , 2018 2018 Citations: 56
Public policies for renewable energy: a review of the perspectives for a circular economy AMM Nunes, LM Coelho Junior, R Abrahão, EP Santos Júnior, FJ Simioni, ... Energies 16 (1), 485 , 2023 2023 Citations: 55
Identification and analysis of impact factors on the economic feasibility of photovoltaic energy investments R de Oliveira Azevêdo, P Rotela Junior, LCS Rocha, G Chicco, G Aquila, ... Sustainability 12 (17), 7173 , 2020 2020 Citations: 53
Main trends and criteria adopted in economic feasibility studies of offshore wind energy: A systematic literature review ALG Pires, P Rotella Junior, SN Morioka, LCS Rocha, I Bolis Energies 15 (1), 12 , 2021 2021 Citations: 51
Environmental and financial multi-objective optimization: Hybrid wind-photovoltaic generation with battery energy storage systems ALG Pires, PR Junior, LCS Rocha, RS Peruchi, K Janda, ... Journal of Energy Storage 66, 107425 , 2023 2023 Citations: 45
Oil price volatility: A real option valuation approach in an African oil field MN Fonseca, E de Oliveira Pamplona, VE de Mello Valerio, G Aquila, ... Journal of Petroleum Science and Engineering 150, 297-304 , 2017 2017 Citations: 44
Wind energy investments facing uncertainties in the Brazilian electricity spot market: A real options approach G Aquila, AR de Queiroz, PP Balestrassi, PR Junior, LCS Rocha, ... Sustainable Energy Technologies and Assessments 42, 100876 , 2020 2020 Citations: 43
Cultura e clima organizacionais: um estudo em indústrias de laticínios do Estado do Rio Grande do Norte LCS Rocha, EA Pelogio, MEM Añez Gestão & Produção 20, 455-468 , 2013 2013 Citations: 41
Identification and analysis of impact factors on the economic feasibility of wind energy investments R de Oliveira Azevêdo, P Rotela Junior, G Chicco, G Aquila, ... International Journal of Energy Research 45 (3), 3671-3697 , 2021 2021 Citations: 40
Feasibility of hybrid wind and photovoltaic distributed generation and battery energy storage systems under techno-economic regulation GND de Doile, PR Junior, LCS Rocha, K Janda, G Aquila, RS Peruchi, ... Renewable Energy 195, 1310-1323 , 2022 2022 Citations: 39
Robust multiple criteria decision making applied to optimization of AISI H13 hardened steel turning with PCBN wiper tool LCS Rocha, AP de Paiva, P Rotela Junior, PP Balestrassi, ... The International Journal of Advanced Manufacturing Technology 89 (5), 2251-2268 , 2017 2017 Citations: 39
Perspectives under uncertainties and risk in wind farms investments based on Omega-LCOE approach: An analysis in São Paulo state, Brazil G Aquila, WT Nakamura, PR Junior, LCS Rocha, E de Oliveira Pamplona Renewable and Sustainable Energy Reviews 141, 110805 , 2021 2021 Citations: 38
Analysis of the wind average speed in different Brazilian states using the nested GR&R measurement system G Aquila, RS Peruchi, PR Junior, LCS Rocha, AR de Queiroz, ... Measurement 115, 217-222 , 2018 2018 Citations: 38
Optimization methods of distributed hybrid power systems with battery storage system: A systematic review AM Barbosa, PR Junior, LCS Rocha, A de Souza Barbosa, I Bolis Journal of Energy Storage 97, 112909 , 2024 2024 Citations: 36
Impacts of economic regulation on photovoltaic distributed generation with battery energy storage systems GND de Doile, PR Junior, LCS Rocha, K Janda, R Peruchi, G Aquila, ... Journal of Energy Storage 72, 108382 , 2023 2023 Citations: 33