Biogas from anaerobic co-digestion of food waste and primary sludge for cogeneration of power and heat (original) (raw)
Related papers
Anaerobic process for the biogas production
Journal Nano, Science & Tecnology, 2020
The industrialization of the last century has created an increase in the greenhouse gases (CO2, CH4, etc) that makes inevitablethe increase of the global temperature. However that can be mitigated in several ways, one of the most relevant is the change ofthe actual energy mix based on fossils fuels. Although in Latin-American a great proportion of the energy mix is provided byhydroelectric energy, the climate changes is also affecting negatively this source of power due to the change in the dry-wetseason patterns.Also there are regions where the net power (electrical and others) does not reach the total of the population,especially in rural zones. The renewable energies play here an important role as alternative source of energy as an action tomitigate the global warming. Colombia with an important agricultural sector produces important amounts of residues that can beconverted in energy through the anaerobic process to produce biogas. In this way these residues (biomass) are as the same timeproducing an energy product (biogas) as bio-fertilizer (manure) from the transformation of the organic waste.
Use of Food Waste for Generation of Biogas
International Journal of Engineering Research and, 2017
Biogas production requires anaerobic digestion. We should go for creating an Organic Processing Facility to create biogas which will be more cost effective, eco-friendly, cut down on landfill waste, generate a high-quality renewable fuel, and reduce carbon dioxide & methane emissions. The anaerobic digestion of kitchen waste produces biogas, a valuable energy resource [1]. Anaerobic digestion is a microbial process for production of biogas, which consists of primarily methane (CH4) & carbon dioxide (CO2). Mixture of vegetable wastes was an-aerobically digested in a 5L capacity lab scale batch reactors. Biogas can be used as energy source and also for numerous purposes. But, any possible application requires knowledge & information about the composition and quantity of constituents in the biogas produced. The research work was conducted to investigate the production ability of biogas as an alternative energy from kitchen waste with co-digestion of cow dung through anaerobic digestion. In the experiment two digesters were used with same composition of food waste but different amount of cow dung.
Potential of Biogas Power Plant Produced by Anaerobic Digestion of Biodegradable Materials
2013
Biogas typically refers to a gas produced by the breakdown of organic matter in the absence of oxygen. It is a renewable energy source, like solar and wind energy. Furthermore, biogas can be produced from regionally available raw materials and recycled waste and is environmentally friendly and CO2 neutral. Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as manure, sewage, municipal waste, green waste, plant material, and crops. Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes. The gases methane, hydrogen, and carbon monoxide (CO) can be combusted or oxidized with oxygen. This energy release allows biogas to be used as a fuel. Biogas can be compressed, much like natural gas, and used to power motor vehicles. Biogas is a renewable fuel so it qualifies for renewable energy subsidies in some parts of the world. Biogas can also be cleaned and upgrad...
Review Article A Review on Biogas Production from Food Waste
2014
Currently, much of our biodegradable wastes such as kitchen wastes, agricultural wastes & animal wastes are used to produce Biogas, a powerful greenhouse gas. Anaerobic digestion (AD) is a treatment that composts these wastes in the absence of oxygen, producing a biogas that can be used to generate Heat & Power. Producing renewable energy from our biodegradable wastes helps to tackle the energy crisis. It is effectively a controlled and enclosed version of the anaerobic breakdown of organic wastes which releases methane. AD produces a biogas made up of around 60 per cent methane and 40 per cent carbon dioxide (CO₂). As well as biogas, AD produces a solid and liquid residue called digestate which can be used as a soil conditioner to fertilise land. The amount of biogas and the quality of digestates obtained will vary according to the feedstock used. More gas will be produced if the feedstock is more liable to decompose.
The objective of this paper is to analyse the production processes of biogas as an alternative energy source. Biogas is generated from biomass by digestion under anaerobic conditions in the presence of microorganisms in three stages involved in the combined anaerobic digestion process. The biogas produced in anaerobic digestors could contain methane concentrations upto 80% by volume. This system can be integrated with the agricultural waste to produce biogas and small play an important role in improving residential sanitation and economical development in rural areas.
Anaerobic Digestion and Biogas
Anaerobic Digestion & Biogas USA will bring together the leading policy makers, financiers, utilities, developers and manufacturers at the forefront of the Biogas industry to deliver their insights on how to prove the value of your technology within the US energy mix. Fill in your details on the right to receive the PDF brochure and see the companies you will meet at Anaerobic Digestion and Biogas USA 2015. Get the brochure now with: 15 dedicated agenda sessions: two days dedicated to regulation, project financing and technology cost and performance so that you can create a robust strategy to deploy your technology at scale and position your solution as the most competitive in the market 30 speakers and 120+ decision makers under one roof: brand new networking facilities to ensure you cement business relations with the industry’s most active players such as the US Department of Energy , California Energy Commission, City of Palo Alto, Stern Brothers, Harvest Power, SoCal Gas, Zero Waste Energy and US EPA Sponsorship opportunities: Discover how you can maximize your visibility at Anaerobic Digestion and Biogas 2015 with our tailored sponsorship opportunities Your e-brochure includes... Full conference agenda Complete speaker line-up Ticket prices and exclusive discounts Thanks
Co-digestion of Food Waste and Human Excreta for Biogas Production..pdf
The ever increasing cost of fossil fuels and its attendant pollution menace has provided the pedigree to consider alternative sources of energy. An investigation was launched into the design and construction of an Anaerobic Digester system from locally available raw materials using local technology and the production of biogas from food wastes and Human excreta generated within a University campus. The experiment lasted for 60 days using a 40-liters laboratory scale anaerobic digester. The volume of gas generated from the mixture was 84,750cm3 and comprised of 58% CH4, 24% CO2, and 19% H2S and other impurities. The physico-chemistry of the feedstock in the digester revealed an initial drop in pH to more acidic range and a steady increase 4.52 – 6.10. The temperature remained relatively constant at mesophilic range: 22.0ºC– 30.5ºC throughout the study. The Carbon/Nitrogen (C/N) ratio of the feedstock before digestion was within 139:1. Population distributions of the microflora show aerobic and anaerobic bacteria to include Klebsiella spp, Bacillus spp, Escherichia coli, Clostridium spp and a methanogen of the genera Methanococcus. In most developing nations of Sub-Saharan Africa where biomass is abundant, and where biogas technology is in its infant stage, the anaerobic digestion system could be the much awaited solution.
Biogas Production from Anaerobic Digestion of Biodegradable Household Wastes
Nepal Journal of Science …, 2011
Biopower can diversify energy supply and improve energy resiliency. Increases in biopower production from sustainable biomass can provide many economic and environmental benefits. For example, increasing biogas production through anaerobic digestion of food waste would increase the use of renewable fuels throughout California and add to its renewables portfolio. Although a biopower project will produce renewable energy, the process of producing bioenergy should harmonize with the goal of protecting public health. Meeting air emission requirements is paramount to the successful implementation of any biopower project. A case study was conducted by collecting field data from a wastewater treatment plant that employs anaerobic codigestion of fats, oils, and grease (FOG), food waste, and wastewater sludge, and also uses an internal combustion (IC) engine to generate biopower using the biogas. This research project generated scientific information on (a) quality and quantity of biogas from anaerobic codigestion of food waste and municipal wastewater sludge, (b) levels of contaminants in raw biogas that may affect beneficial uses of the biogas, (c) removal of the contaminants by the biogas conditioning systems, (d) emissions of NO x , SO 2 , CO, CO 2 , and methane, and (e) types and levels of air toxics present in the exhausts of the IC engine fueled by the biogas. The information is valuable to those who consider similar operations (i.e., co-digestion of food waste with municipal wastewater sludge and power generation using the produced biogas) and to support rulemaking decisions with regards to air quality issues for such applications. Implications: Full-scale operation of anaerobic codigestion of food waste with municipal sludge is viable, but it is still new. There is a lack of readily available scientific information on the quality of raw biogas, as well as on potential emissions from power generation using this biogas. This research developed scientific information with regard to quality and quantity of biogas from anaerobic codigestion of food waste and municipal wastewater sludge, as well as impacts on air quality from biopower generation using this biogas. The need and performance of conditioning/pretreatment systems for biopower generation were also assessed.
Using biogas as an energy source
E3S Web of Conferences
This article discusses the topic of sewage sludge digestion. Anaerobic digestion of sewage sludge makes it possible to obtain biogas, which can later be used to generate heat or electricity. this approach to resource use is recognized worldwide as more environmentally friendly. The article discusses the experience of European countries in the production and use of biogas. In the Russian Federation, the situation is complicated by the fact that wastewater contains a small amount of organic matter, which is a product for biogas production. Therefore, methods have been proposed for increasing the content of organic matter in sediments, for example, by means of separate waste collection and disposal of organic waste through grinders into the sewerage system. Or, the amount of organic matter in the sewage sludge can be increased by adding manure from animal farms. The stages of sediment fermentation are considered. The topic of rationality and payback of the use of biogas is raised. Proj...
Physical Science International Journal
Anaerobic digestion is an effective method for organic pollution reduction and bio-energy production and has increasing applications worldwide. Produced biogas consists mainly of 50-70% methane (CH 4) and 30-50% carbon dioxide (CO 2). The most common utilization route of biogas is for electricity production, often combined with utilization of the excess heat. This widens up the opportunities to utilize biogas in distant energy consumption locations. The most common methods for biogas upgrading include water washing, pressure swing adsorption, polyglycol adsorption, and chemical treatment, which are performed outside the anaerobic reactor and require investments in