SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Biohydrogen has significant feasibility since biological processes are much less energy intensive compared with electrolysis and thermo-chemical processes. Biological processes and bacterial fermentation are considered as the most environmentally friendly alternatives for satisfying future hydrogen demand. Biohydrogen production from biomass is considered profitable as biomass is abundant, cheap, and biodegradable. The combustion of H2 with O2 produces water as its only product: Unlike other fuels, the combustion of H2 does not produce CO2, CO, NOx, or SO2. Therefore, H2 is an environmentally friendly fuel. The objective of this study is to increase biohydrogen production from biomass using nanotechnology. In this study, it is hypothesized that the...

Enhancing the efficiency of evaporative cooling pads for livestock barns and greenhouses by moisture adsorption

Ano: 2023

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/8261

High levels of relative humidity negatively affect the efficiency of the evaporative cooling pads installed in livestock barns and greenhouses. Consequently, the productivity decreases causing economic losses. Therefore, this project aims at prototyping innovative dehumidifying/desiccant segments to be installed on the conventional cooling pads enabling them to provide suitable microclimate conditions, especially temperature and relative humidity, for animals and plants. The hypothesis is that desiccant segments adsorb air moisture before introducing the air into the pads; consequently, the treated air is then able to absorb more moisture from the cooling pads, i.e. the cooling pads evaporate more water in the treated air, where water evaporation requires...

Cell phone application for sizing anaerobic digesters and computing energy production, biogas and methane yields

Palavras-chave: Agricultural Engineering; Farm Buildings and Construction cooling pads; Livestock housing; Heat stress; Indoor air quality; Greenhouses.

Ano: 2015

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3450

To perform the calculations required for sizing anaerobic digesters and computing energy production and biogas and methane yields, various procedures should be conducted; this requires time and efforts, with the risk of making mistakes. The objective of this study was to create a tool to aid users and specialists in managing these computations by offering an application which can be installed on cell phones. A mathematical model was developed to perform the calculations. Then, a flowchart was created, and the mathematical model was incorporated into the flowchart. Then, MIT App Inventor was used to configure an application software by combining the flowchart and the mathematical model and making the user interface. Data were acquired from governmental...

Bioplastics production from agricultural crop residues

Ano: 2023

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/8263

Bio-based plastics have a huge market and a wide range of applications and then have become increased in economy and research. Due to the environmental hazard on all organisms and the pollution that happens in all natural resources such as air, water, plants and soil pollution and the limitation of quantity of fossil resources on our planet, the future cannot depend on petro-plastics. All fossil products should be replaced by bio-based products. The petro-plastics are one of the fossil products which should be replaced by bio-based plastics. In this study, potato peels were used to produce bioplastics by the extraction of the starch from the peels and adding some ingredients such as water, glycerin, vinegar and industrial colors with different ratios and...

Increasing biodiesel production from microalgae using chemical additives

Palavras-chave: Bioresource Engineering; Biosystems Engineering; Bioengineering bioplastics; Bio-based plastics; Biodegradable plastics; Bioprocessing; Bio-based materials; Biopolymers; Agricultural wastes..

Ano: 2019

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5308

At present, the major body of research is focused on weaning the world from fossil fuels. The problem is that the world is running out of fossil fuel. Therefore, an alternative source must be identified. The biofuels are promising alternatives. In the case of petrodiesel, a promising alternative is biodiesel production from algae. The ability of microalgae to generate large quantities of lipids with a fast growth rate made them superior biodiesel producers. An important factor of determining optimal microalgal activity is the bioresponse to changes in trace metal concentration and quantity. The effects of the addition of the following chemicals were investigated: calcium chloride (CaCl2) with a concentration of 2 mg/L, potassium chloride (KCl) with a...

Life cycle assessment of a portable assembly biogas unit used for treating food, kitchen and landscape wastes

Ano: 2022

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7787

The biogas unit under investigation is a specially designed portable assembly biogas unit and is sought to be widespread and commonly used in Egypt by the Egyptian Environmental Affairs Agency (EEAA). This unit is able to anaerobically treat different types of organic wastes, which are: food waste, kitchen waste, and waste from landscape. The main objective of this study is to perform an environmental impact evaluation of the implementation of this biogas unit. The specific greenhouse gas (GHG) emissions of using the produced biogas from the unit for electricity and heat generation were calculated, where the methodology of life cycle assessment (LCA) was applied. The results show the GHG emissions for each component of the biogas unit and each process...

Biobutanol and bioethanol production from agricultural wastes: A cell phone application for computing the bioconversion rates

Palavras-chave: Life cycle analysis; Biogas units; Food waste; Kitchen waste; Landscape waste; Greenhouse gases.

Ano: 2022

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7047

To carry out the calculations required for modelling and computing for kinetics biobutanol and bioethanol yields and production rates, several procedures should be accomplished; this requires time and effort, and there is a chance that mistakes will be made. The goal of this study is to provide a tool that will assist users, engineers, and experts in conducting these computations by creating a mobile application to reduce time and effort. The calculations were carried out using a mathematical model. The mathematical model was then included in a flowchart that was created later. After that, Kodular was used to configure the mobile application by fusing the interface design, mathematical model, and flowchart. Information was gathered from publications,...

Emissions inventory of greenhouse gases and ammonia from livestock housing and manure management

Ano: 2023

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/8763

An emission inventory is a database on the amount of pollutants released into the atmosphere. The anthropogenic emissions of air pollutants and greenhouse gases are detrimental to the environment and the ecosystems. Therefore, reducing emissions is crucial. One key issue is to inventory these emissions, and consequently databases on anthropogenic emissions will be available for making decisions on implementing suitable mitigation strategies. Such investigations aim at developing national emissions inventory for domestic livestock and to identify possible abatement techniques in order to reduce these emissions. Therefore, the objectives of this study are to introduce and define the emissions inventories, review the emission inventory guides, introduce...