ENERGY INNOVATION AND SUSTAINABILITY ON CAMPUS: IMPLEMENTATION OF A BIOGAS SYSTEM AT IFBA SALVADOR

Objective: To investigate the feasibility and benefits of implementing a biogas system at IFBA Salvador campus, focusing on energy sustainability and efficient waste management. Theoretical Framework: Addresses the importance of energy sustainability in educational environments, with an emphasis on the use of biogas as an alternative to LPG. Examines the environmental impact of using fossil fuels and the effectiveness of biogas-based solutions. Method: Uses an exploratory approach to collect and analyze data on LPG consumption and organic waste generation at the IFBA Salvador campus cafeteria and restaurant. The methodology includes quantitative analyses of GHG emissions and the assessment of the infrastructure needed to implement the biogas system. Results: Reveals significant potential for reducing LPG consumption and GHG emissions through the implementation of biogas. Identifies environmental and economic benefits, including the estimated annual savings and reduction of CO2 emissions. Research Implications: Highlights the importance of the project for energy sustainability and environmental awareness in the educational context. Emphasizes the role of waste management and renewable energy in reducing environmental impact and promoting sustainable practices. Originality/Value: Presents an innovation in the Brazilian educational context, demonstrating the applicability and benefits of biogas systems in academic environments. Contributes to the advancement of knowledge in energy sustainability and waste management in the educational sector.


INTRODUCTION
Technical and higher education institutions are sources of the country's intellectual capital and cradles for the development and application of technologies in the most diverse areas, where the search for innovation, training and academic improvement is constant, not only from a technological aspect, but also with the global agendas under debate, which generate research, development and innovation.
In this environment of intellectual effervescence, issues such as sustainability and energy efficiency gain prominence in the form of projects, with benefits for the academic community and society, especially the global energy transition scenario and the need to reduce dependence on energy sources that are harmful to the environment.environment, such as fossil fuels.The Federal Institute of Education, Science and Technology of Bahia (IFBA) is a multicampus institution that has, according to its Institutional Development Plan (PDI IFBA 2020), 22 campuses ; 1 Advanced Core; 2 campuses in the implementation phase; 5 Reference Centers, also under construction; and 1 Innovation Hub, installed in the Bahia Technological Park, in Salvador/Ba.According to the PDI IFBA 2014-2018, the Salvador Campus is the oldest unit of the Institute and also the one that houses the largest number of students and teachers, in an area of approximately 50,000 m² in the Barbalho neighborhood, Historic Center of the city.
The academic community at the Salvador campus currently has more than 4,500 people enrolled in 5 secondary-level technical courses subsequent to High School, 10 higher education courses, nine secondary-level technical courses integrated into High School, including an integrated EJA course, and 3 lato sensu postgraduate courses, in addition to PRONATEC classes and extension courses and other activities developed seasonally.
Students are served by 417 permanent teachers, 185 administrative technicians, as well as outsourced employees .The Campus, located in the Barbalho neighborhood, Historic Center of the city, occupies an area of approximately 50,000 m², consisting of 1 administrative building and 8 pavilions of classrooms and laboratories, 1 library, study rooms, covered multi-sports gym and courts external spaces for sports, common spaces, 2 parking lots, medical and dental services, printing, cafeteria and restaurant for students, with 800 spaces for each meal (IFBA, 2023).4 currently used for cooking food, replacing it with another more sustainable energy source, such as biogas/ biomethane .To this end, field research was carried out in the aforementioned environments, aiming to obtain consumption data and evaluate the feasibility of different intervention alternatives.This proposal is not limited to financial and operational benefits, but extends to environmental education and engagement at Campus Salvador.

ENERGY TRANSITION AND BIOGAS
Intervention projects are essential to drive significant changes in public policies and society as a whole.Lassance (2022) highlights that these projects represent critical and appropriate actions in response to complex problems, serving as catalysts for development and innovation.Gioda (2018), shows that biogas has a lower environmental impact than LPG, making it a more ecologically suitable option due to its composition, which includes methane (60%), carbon dioxide (35%) and other gases (5%) , varying according to the organic matter used in the production process ( Wereko-Brobby & Hagen, 2000).Its production, according to Karlsson et al. (2014), involves the anaerobic decomposition of organic matter, in biodigesters (a closed equipment that does not allow the entry of oxygen), which results in methane (CH 4 ) and organic fertilizers, the quantity produced depending on some factors, such as the amount of substrate, temperature and retention time.Other works justify that in addition to generating clean energy, the Biogas process contributes to efficient waste management (Sylvio & Ferreira, 2021;Leite et al. 2023).
As it comes from organic matter, in the Biogas burning process, according to Karlsson et al. (2014), "there is no additional release of carbon dioxide (CO 2 ), but rather the use of the energy potential that is stored in organic matter".Furthermore, methane is a Greenhouse Gas (GHG), which, when released into the atmosphere, contributes to global warming.Therefore, by giving a use to gas that could contribute to global warming when released into the atmosphere, the appropriate use of biomethane produced from the decomposition of organic matter in biodigesters has economic, social and environmental advantages.
According to EMBRAPA (2022), organic waste from various sources, such as domestic waste, residues from agricultural practices and urban solid waste (MSW), can be used as raw material in biodigesters for the production of biogas.This biogas, after adequate purification, becomes a valuable source of renewable energy that contributes to reducing 5 greenhouse gas emissions and promoting the energy transition.Business models related to biogas vary depending on the technology chosen and the sectors in which the projects are implemented.Also according to EMBRAPA (2022), the choice of the technological route influences the scale of the project, the types of waste processed and the resulting products or services.Furthermore, the project implementation sector determines the availability of substrates, logistical conditions, regulations, main stakeholders and available infrastructure.
According to Souza et al. (2015), the valorization of products and services related to biogas can include the use/commercialization of electricity, biomethane , biofertilizer , thermal energy, environmental certificates, energy security in rural areas and future alternatives, such as the use of CO 2 for industry and environmental services.
Restaurants, including those located in educational environments such as the IFBA campus Salvador, generate significant amounts of organic waste, both in the food preparation process and through leftovers not consumed by patrons.Conventional treatment of this waste often involves disposal in landfills, which can contribute to environmental problems such as methane emissions and inefficient use of resources.Furthermore, the cooking process in these establishments often requires intensive use of heat, which in the case of IFBA, is predominantly supplied by Liquefied Petroleum Gas (LPG).Given its fossil origin and high GHG emissions, LPG is subject to price fluctuations on the international market, which can significantly impact the campus's operating costs.
In this scenario, the proposal to install a biodigester to process this organic waste represents an innovative and sustainable solution.This approach not only aims to reduce dependence on and daily consumption of LPG, relieving pressure on operational costs, but also transforms food waste into a valuable source of energybiogas.In addition to providing a more sustainable and economical energy alternative for cooking, the biodigestion process results in the production of nutrient-rich biofertilizers , which can be used to enrich the soils of gardens and green areas on campus.
The diversification of energy sources is increasingly necessary given the growing demand for reliable, high-quality energy.In this sense, strengthening non-conventional renewable energies is fundamental for the decentralization of energy generation, bringing it closer to consumption points and, consequently, increasing local energy security.The transition to more sustainable and renewable energy sources, such as biogas, represents a significant step towards a cleaner and more resilient energy future.
Furthermore, the state of Bahia, where IFBA is located, plays a crucial role in the renewable energy scenario in Brazil.With great potential in wind, solar and biogas energy, Bahia exemplifies the importance of energy diversification to meet the growing demand for clean and reliable energy.Biogas, in particular, represents a notable opportunity in the region, enabling the conversion of organic waste and biomass into sustainable energy.This not only contributes to the reduction of greenhouse gas emissions, but also strengthens the local economy, creates jobs and boosts the renewable energy sector.

METHODOLOGY
The proposed project for the implementation of a biogas system at the IFBA campus Salvador is a proactive response to contemporary environmental challenges, particularly issues related to greenhouse gas emissions and sustainable waste management.This study employs an applied and exploratory methodology, focusing on the quantitative and qualitative analysis of the environmental and operational benefits of replacing LPG with biogas.
At the IFBA campus Salvador, the focus of the biogas project is on the strategic areas of the cafeteria and restaurant, both central to campus life due to their intense use of LPG for cooking and the significant generation of organic waste.The cafeteria is the main food point for the academic community, while the restaurant, although smaller, offers complementary services and is conveniently accessible for visitors and administration.
Figure 1 illustrates the location of these facilities on campus, providing an essential overview for efficient planning of the biogas system, considering the proximity of these areas to other important campus facilities.Our research begins with an exploratory approach, which allows a deeper understanding of the phenomenon under study through flexible planning.This phase involves a bibliographic survey and analysis of secondary sources.The objective is to establish a clear overview of current practices and potential impacts of implementing a biogas system in an academic environment.A data survey was carried out, focusing on the current consumption of LPG and the generation of organic waste in the campus cafeteria and restaurant.Quantifying LPG consumption allows us to understand the campus' dependence on this fossil fuel, while analyzing organic waste provides insights into the potential substrate for biogas production.This data collection involves not only measuring the volume of LPG used, but also evaluating the quantity and type of organic waste produced, including food waste and preparation waste.
The methodology includes a quantitative estimate of greenhouse gas emissions, particularly carbon dioxide, as an environmental impact that would be reduced by replacing LPG with biogas.This analysis is based on the compilation of data on current LPG consumption on campus and the emission characteristics of this fuel.Standard emission calculation models were used to quantify potential GHG reduction.
Next, a detailed assessment of local conditions was carried out to determine the feasibility of installing the biodigester.This analysis includes identifying suitable locations on campus for the installation, considering aspects such as proximity to waste sources, space availability and existing infrastructure.This process is crucial to ensure that the installation of the biodigester is technically viable and affordable.At the same time, a technical analysis 8 was carried out to evaluate the feasibility and efficiency of a biodigester on campus.This analysis considers the quantity and type of organic waste available, the required biodigester capacity, appropriate biodigestion technologies and infrastructure requirements.
In addition to environmental aspects, an economic analysis was carried out, which consists of evaluating the installation and maintenance costs of the biogas system in comparison with the expected savings from reducing LPG consumption.Estimating return on investment is a crucial aspect as it provides a clear picture of the period required to recover initial costs based on anticipated operational cost savings.
Finally, the importance of a careful and detailed analysis is also highlighted to establish the feasibility of implementing a biogas system on the IFBA campus Salvador.
This methodological approach provides a comprehensive understanding of the environmental and operational benefits of replacing LPG with biogas, analyzing the impact on greenhouse gas emissions, the efficient management of organic waste and the economic viability of the system.Through this study, we sought not only to develop an understanding of the specific dynamics of the campus, but also to provide insights that can support decision-making for future practical implementations of the system.The methodology adopted ensures that all relevant aspects are considered, establishing a clear path to move towards a more sustainable and environmentally responsible campus.

RESULTS AND DISCUSSIONS
The project to implement the biogas system at the IFBA campus Salvador focuses specifically on the cafeteria and restaurant areas, strategic locations due to their high consumption of LPG and generation of organic waste.The delimitation of these areas is crucial for the accurate analysis of energy needs and for the effective planning of the biogas system.The campus dining hall is a vital area, serving as the main food outlet for students, faculty and staff.This installation is characterized by a high volume of daily food preparation, which consequently leads to significant LPG consumption and generation of organic waste.The campus restaurant, although smaller compared to the dining hall, plays an important role in providing additional food options for the campus community.Similar to the cafeteria, the restaurant also depends considerably on LPG for cooking and generates a notable amount of organic waste.

EXPLORATORY ANALYSIS
Within the scope of the project to implement a biogas system at the IFBA campus Salvador, a detailed data survey was conducted, adopting an exploratory approach focused on LPG consumption and the generation of organic waste in the cafeteria and restaurant areas.This analysis was essential to assess the feasibility and potential impact of replacing LPG with biogas.
In the cafeteria, the survey revealed a significant use of LPG, with the operation of 7 P-45 cylinders, with its logistical and safety characteristics.Furthermore, the daily generation of approximately 3,600L of organic waste was observed.It is noteworthy that the cafeteria has already implemented selective collection practices, facilitating the efficient separation of organic waste, an important practice for the effective feeding of the future biogas system.
On the other hand, in the restaurant, the scale of operation is smaller, with the use of only two 13kg LPG cylinders.The generation of organic waste, although in smaller quantities compared to the cafeteria, still presents an opportunity for the production of biogas, with the collection of around 600L of waste per day.However, the absence of a selective collection system in the restaurant poses additional challenges for the effective separation of organic waste.
Figure 2 shows the differences between the two facilities in terms of LPG consumption and organic waste generation.10 considered that the fraction of organic waste in the collected garbage corresponds to 50%, 900 liters of organic waste daily, which is equivalent to 450 kg, taking into account the average density of organic waste of 0.5%.Similarly, in the restaurant, where 100L bags are filled to 70% of their capacity, the total volume of waste per day is 420 liters.Applying the same percentage of organic waste, we reached 210 liters of organic waste daily, corresponding to 105 kg.Furthermore, LPG consumption in both installations was analyzed.In the cafeteria, the use of 7 P-45 LPG cylinders every 15 days was converted into a daily consumption of 21 kg, equivalent to 11.28 m 3 .In the restaurant, the consumption of two 13 kg cylinders every four days results in a daily consumption of 6.5 kg, or 3.49 m3 of LPG.This data is crucial to quantify the potential reduction in dependence on LPG with the implementation of the biogas system, highlighting the potential for improvement in waste management and energy sustainability on campus.
The results of this exploratory analysis provide valuable insights for the proposed implementation of a biogas system on campus.They indicate significant potential for reducing LPG consumption and improving organic waste management, aligning with the institution's sustainability and environmental innovation objectives.

ENVIRONMENTAL IMPACT ASSESSMENT
A quantitative assessment of GHG emissions, particularly carbon dioxide (CO 2 ), was carried out from both current LPG consumption and potential biogas consumption.For LPG, it was estimated that the cafeteria emits 63 kg of CO 2 per day, while the restaurant emits 19.5 kg of CO 2 daily.Replacing LPG with biogas, a consumption of 51.24 m 3 of biogas in the cafeteria and 15.86 m 3 in the restaurant per day was estimated.This consumption would result in emissions of 12.81 kg of CO 2 in the cafeteria and 3.97 kg of

11
CO 2 in the restaurant, significantly lower than LPG emissions.Table 2 summarizes the environmental impact assessment at IFBA Campus Salvador.
In the analysis of CO 2 emissions from LPG, a standard value of 3 kg of CO 2 emitted for each kg of LPG burned was adopted.This value is based on available data on typical fossil fuel emissions.For biogas, an estimate of 0.25 kg of CO 2 / m 3 of biogas burned was used , a value that reflects the lower carbon intensity of biogas compared to LPG.The conversion of LPG consumption to the biogas equivalent was carried out based on the energy equivalence factor, where 1 kg of LPG is equivalent to approximately 2.44 m 3 .This conversion is crucial to estimate the amount of biogas needed to replace the LPG currently used in the cafeteria and restaurant.
With regard to CO 2 emissions from untreated organic waste, we assume that each kg of organic waste emits 0.25 kg of CO 2 when decomposed.This estimate is based on studies on the decomposition of organic waste and its typical GHG emissions.
These assumptions and conversion values are fundamental to understanding the potential reductions in CO 2 emissions that the biogas project can offer.Additionally, they highlight the importance of efficient waste management practices to minimize the environmental impact on campus.Through this analysis, we sought to provide a solid basis for arguing in favor of implementing the biogas system at IFBA Campus Salvador, highlighting its environmental benefits and its contribution to the sustainability of the campus.

EQUIPMENT AND INFRASTRUCTURE
The effective implementation of a biogas system at the IFBA campus Salvador requires careful selection of equipment and adequate infrastructure, essential aspects to guarantee the efficiency and safety of the system.Planning begins with the choice of the 12 biodigester, the central component of the system, where the anaerobic decomposition of organic waste will produce biogas.The biodigester capacity must be sufficient to process the estimated amount of organic waste generated daily in the cafeteria and restaurant, taking into account our estimates of waste generation and the volumes of waste available for biodigestion .
Several models of biodigesters are available, each with its own particularities in terms of efficiency, cost, ease of maintenance and suitability for the type of waste processed.
The choice of the ideal model must be based on these criteria, in addition to considering local conditions and ease of integration with existing infrastructure.The location of the biodigester on campus is another critical decision, which must balance convenience of access to waste, operational safety and environmental impact.
Once produced, biogas requires a safe and efficient storage system.Storage capacity needs to be aligned with daily biogas production and the campus's energy needs.The system must incorporate all necessary measures to prevent leaks and explosions, ensuring safe biogas storage.Furthermore, the biogas distribution infrastructure is a vital aspect, which includes the installation of pipes, valves and control devices.This system must be robust and effective, ensuring the safe and efficient distribution of biogas to points of use, mainly the cafeteria and restaurant, where it will replace LPG.
Integrating the biogas system with the existing infrastructure on campus is a challenge that requires special attention.This includes adapting current facilities, complying with technical standards and environmental regulations, and implementing operational and emergency safety practices.It is essential to ensure that the biogas system not only integrates harmoniously with the campus, but also contributes to the energy efficiency and sustainability of the academic environment.
In summary, the success of the biogas project at IFBA campus Salvador depends on the appropriate choice of equipment and infrastructure.With detailed planning, considering all technical, operational and safety aspects, the biogas system can become an example of sustainable innovation in the educational context, aligning the campus with renewable and responsible energy practices.
For this project to implement the biogas system, in addition to projects that can be built on site, equipment that can be purchased commercially was researched.Due to practicality and available data, two market products were chosen, both from the company HomeBiogas (2023) which offers practical and efficient solutions that align with the needs  With a price of R$10,400.00,HomeBiogas 2.0 is an economical and efficient option for small amounts of organic waste.
HomeBiogas 7.0 model is larger, with dimensions of 400cm x180cm x150cm, has a 2,500 liter gas tank and a 4,300 liter digestion tank, can process up to 10 kg of kitchen waste daily, and produces 4 to 6 hours of cooking per day and 10 to 100 liters of biofertilizer .The price of HomeBiogas 7.0 is R$15,400.00,representing a more robust solution for larger volumes of waste.
The choice between models must consider the specific needs of the IFBA campus Salvador.The volume of waste generated, the space available for the installation, and the demand for biogas and biofertilizer are crucial factors in this decision.As well as the operating process that must guarantee operability and maintenance that do not clash with the campus routine, as shown in Figure 4.In conclusion, the incorporation of a biodigester in the project represents a practical and efficient solution for the management of organic waste and the production of renewable energy at the IFBA campus Salvador.Choosing the appropriate model is a fundamental step to guarantee the viability and effectiveness of the biogas system, contributing significantly to the institution's sustainability objectives.
Another crucial aspect is the construction of an efficient piping infrastructure, which will transport the biogas generated by the biodigester to the consumption points, gas appliances such as stoves, ovens and fryers.This piping network must be designed to guarantee maximum efficiency and safety in the distribution of biogas, avoiding leaks and guaranteeing a continuous and reliable supply of gas to the cooking appliances.In addition to transporting biogas, an important consideration is the adaptation of existing gas appliances for use with biogas.This may require modifications to equipment to ensure compatibility and adequate performance with biogas, which has different characteristics from LPG.
Another vital element of the biogas system is the management of the biofertilizer produced as a byproduct of the biodigestion process .Biofertilizer , a nutrient-rich fluid, is generated in significant volumes and requires an effective collection and storage strategy.
The infrastructure for biofertilizer management must include systems for daily collection of the product from the biodigester, as well as appropriate storage tanks.These must be sized to accommodate the volume generated, ensuring that the biofertilizer is stored safely and hygienically until use or distribution.
Leveraging biofertilizer on campus presents a valuable opportunity for sustainability.It can be used in green areas on campus, contributing to the maintenance of gardens and landscaped spaces, and potentially in urban agriculture projects or community gardens.This application not only recycles nutrients but also promotes more sustainable gardening and farming practices within the campus.
The infrastructure for the biogas system at the IFBA campus Salvador must be comprehensive, addressing not only the production and distribution of biogas, but also the efficient use of the by-products of the process.A quality and practical biodigester, the construction of piping, the adaptation of gas appliances and the efficient management of biofertilizer are essential elements to ensure the success and sustainability of the biogas system.With careful planning and implementation, the system could become an innovative example of energy and waste management in a Bahian educational environment.

ECONOMIC ESTIMATE
When developing the biogas project at the IFBA campus Salvador, a detailed economic analysis is essential to assess the viability of the investment.The implementation of the system involves the acquisition of two biodigesters, one for the cafeteria, at a cost of R$15,400.00,and one for the restaurant, budgeted at R$10,400.00.This totals an initial investment of R$25,800.00 to establish the necessary biogas infrastructure on campus.
In addition to the implementation cost, the potential savings obtained by replacing LPG with biogas is a crucial factor in the economic analysis.Considering the current price of a 13kg cylinder of LPG at around R$ 100.00, the annual savings were calculated based on the daily consumption of LPG previously estimated for both installations.In the cafeteria, with a daily consumption of 21 kg of LPG, the annual savings are estimated at R$ 58,947.50,equivalent to the cost of 1,615 13 kg cylinders per day over the course of a year.Likewise, for the restaurant, which consumes approximately 6.5 kg of LPG per day, the annual savings are projected at R$18,250.00.Thus, the total annual savings from replacing LPG with biogas on campus is estimated at an impressive R$ 77,197.50.This cost savings suggests that the initial investment in biodigesters can be recovered in a relatively short period, considering only the savings in LPG consumption.Furthermore, the adoption of biogas brings notable environmental benefits, such as reducing greenhouse gas emissions and promoting more sustainable waste management.Therefore, the implementation of the biogas system on the IFBA Salvador campus emerges not only as an environmentally responsible solution, but also as an economically advantageous choice, perfectly aligning with the institution's sustainability objectives and demonstrating the potential of renewable energy in a educational environment.
Adopting this technology at the IFBA Salvador campus also serves as a powerful educational tool, engaging the academic community in responsible environmental practices and promoting deeper awareness about sustainable waste management and the importance of renewable energy.Furthermore, this initiative positions the campus as an innovative model of sustainability and environmental management in the educational sector, inspiring the adoption of similar practices in other institutions and contributing to global efforts to mitigate climate change.

CONCLUSION
At the IFBA campus Salvador, replacing LPG with biogas in cafeterias and restaurants can offer significant advantages.In addition to reducing operational costs, this change would engage the academic community in sustainable practices and promote the efficient use of organic waste.This move is in line with IFBA's previous initiatives in solar energy, demonstrating an ongoing commitment to sustainability and energy innovation.The installation of photovoltaic plants on several campuses, as part of efforts to achieve energy self-sufficiency, highlights IFBA as a leader in renewable energy practices.
Through a detailed analysis, it was concluded that the installation of biodigesters not only meets the specific needs of the campus in terms of organic waste treatment and energy supply, but also provides a considerable economic return, reducing dependence on LPG and its associated costs.Estimates demonstrate that the implementation of the biogas system can generate substantial annual savings, in addition to contributing significantly to the reduction of greenhouse gas emissions.The choice of biodigester models is aligned with the volumes of waste generated in the cafeteria and restaurant, ensuring effective management and adequate production of biogas and biofertilizer .
In addition to the economic and environmental benefits, the implementation of this system in the educational environment of the IFBA campus Salvador has invaluable pedagogical value.It serves as a tangible example of sustainable and innovative practices for students and the academic community, reinforcing the institution's commitment to sustainability and environmental education.
Therefore, this project is not only a solution to the current challenges faced by the campus in terms of waste management and energy demands, but also a step towards a more sustainable future.Success in implementing this system may inspire other institutions to adopt similar practices, contributing to broader efforts to mitigate climate change and promote a more sustainable society.
Finally, the adoption of biogas at the IFBA campus Salvador aligns with global and regional trends in energy sustainability, representing a significant step towards more ecological and economically viable energy management.This intervention project not only reinforces IFBA's role as a pioneer in sustainability, but also contributes to strengthening Bahia's energy matrix, standing out as a model of innovation and environmental responsibility.
To foster a deeper connection with the academic community, future actions could include developing educational programs and awareness initiatives about sustainability and renewable energy.These strategies aim to promote a more comprehensive understanding of the biogas project and its alignment with campus sustainability goals.The objective is to create an environment where the academic community feels engaged and motivated to actively participate in sustainability initiatives.Also as part of future actions, the necessary steps for implementing the biogas project are outlined .This includes the detailed preparation of the necessary infrastructure, the acquisition of biodigesters and related equipment, and the training of the personnel involved.This planning is crucial to ensure an effective transition to the implementation phase, ensuring that all technical, operational and security aspects are addressed.
___________________________________________________________________________ Rev. Gest.Soc.Ambient.| Miami | v.18.n.4 | p.1-19 | e05354 | 2024.3 The search for sustainable and clean sources for generating electrical and thermal energy has intensified in recent years.In Brazil, according to the Energy Research Company (EPE, 2023), the public sector consumed approximately 3,047×10⁹ kWh of Liquefied Petroleum Gas (LPG) in 2022 and part of this consumption was for cooking food, in cafeterias and restaurants present in public establishments.Created in 2008 by Law No. 11,892, of December 29, the Federal Network of Professional, Scientific and Technological Education covers: the Federal Institutes of Education, Science and Technology (Federal Institutes); the Federal Technological University of Paraná -UTFPR; the Celso Suckow da Fonseca Federal Centers for Technological Education in Rio de Janeiro ( Cefet -RJ) and Minas Gerais ( Cefet -MG); the Technical Schools linked to Federal Universities; and Colégio Pedro II (BRASIL, 2008).
Given the current energy context and the infrastructure of IFBA's Salvador campus, this article proposes an innovative intervention focusing on the thermal energy used in the institution's cafeteria and restaurant.The objective is to propose an alternative to LPG, Energy Innovation and Sustainability on Campus: Implementation of A Biogas System at IFBA Salvador ___________________________________________________________________________ Rev. Gest.Soc.Ambient.| Miami | v.18.n.4 | p.1-19 | e05354 | 2024.
Figure 3Two models of biodigesters

Table 1
starts from data collection and specific assumptions, from which the calculations were adjusted to reflect a more realistic estimate of waste generation.It was Energy Innovation and Sustainability on Campus: Implementation of A Biogas System at IFBA Salvador ___________________________________________________________________________ Rev. Gest.Soc.Ambient.| Miami | v.18.n.4 | p.1-19 | e05354 | 2024.

Table 1
LPG Consumption and Waste Generation at IFBA Campus Salvador

Table 2
Environmental Impact Assessment at IFBA Campus Salvador