Optimisation of Biogas Production from Anaerobic Co-Digestion ab 78.99 € als Taschenbuch: of organic wastes. Aus dem Bereich: Bücher, Wissenschaft, Technik,
Production of Biogas from CO-Digestion of Cow Dung and Horse Dung ab 61.99 € als Taschenbuch: . Aus dem Bereich: Bücher, Wissenschaft, Technik,
Anaerobic digestion of biomass for biogas production has been developed for a long period of time. In recent years, anaerobic co-digestion in which two or more substrates are treated together has been applied worldwide since the biogas production is improved through this combined process. The book is divided into two parts. Chapter one introduces the biochemical process of anaerobic digestion, anaerobic digesters, feedstocks and recent studies in anaerobic co-digestion. Chapter two illustrates a batch study of anaerobic co-digestion of swine wastewater with switchgrass and wheat straw under mesophilic conditions and studies the effect of total solids concentration on methane production. The book will be a good reference for researchers in related areas.
Energy is a vital commodity. As the fossil fuel resources are limited and their demand is high, the energy gap can be met with the energy generation from renewable resources. Bio-energy generated from diversified sources provides local and emerging opportunities to reduce the over dependence on fossil fuels. Renewable energy from biomass is one of the most efficient and effective options among various other alternative sources of energy currently available. The anaerobic digestion of biomass requires less capital investment and per unit production cost as compared to other renewable energy sources such as hydro, solar and wind. Further, renewable energy from biomass is available as a domestic resource in the rural areas, which is not subject to world price fluctuations or the supply uncertainties as of imported and conventional fuels. Keeping in view the importance of biomass conversion into biogas, the book reports a methodology for maximising the biogas yield from the anaerobic digestion of organic wastes.
This study evaluates the change in particle size of dry-milling corn ethanol co-products by using ultrasonic energy to increase the production of the biogas from the anaerobic digestion of ethanol dry-milling co-products, namely: dried distiller grain with solubles (DDGS), solids, thin stillage, and corn-syrup. The co-product samples were treated with various ultrasonic conditions and compared to non-treated samples (control sample). The ultrasonic amplitude was varied from 52.8 µmpp to 160 µmpp and the sonication time was varied from 10 to 50s. The samples were characterized with scanning electron and optical microscopy (SEM, OM) and particle distribution analysis (PDA). It was found that with solid/liquid suspensions (DDGS, solids), there was a significant decrease in particle size, increasing the surface area to volume ratio, to possibly enhance biogas yield during anaerobic digestion of these materials. In the case of thin stillage and corn syrup, the results were surprising in that an increase in particle size was seen.
This book presents the state of the art in biogas production using anaerobic digestion technology, with an emphasis on waste utilization/valorization. Offering a comprehensive reference guide to biogas production from different waste streams, it covers various aspects of anaerobic digestion technology from the basics, i.e., microbiological aspects to prominent parameters governing biogas production systems, as well as major principles of their operation, analysis, process control, and troubleshooting. Written and edited by internationally recognized experts in the field of biogas production from both academia and industry, it provides in-depth and cutting-edge information on central developments in the field. In addition, it discusses and reviews major issues affecting biogas production, including the type of feedstock, pretreatment techniques, production systems, design and fabrication of biogas plants, as well as biogas purification and upgrading technologies. 'Biogas: Fundamentals, Process, and Operation' also addresses the application of advanced environmental and energy evaluation tools including life cycle assessment (LCA), exergy, techno-economics, and modeling techniques.
The main focus of this book is on energy efficient strategies for sludge management, with special focus on anaerobic digestion which produces biogas to replace fossil fuels. Pulp and paper mill sludge is currently treated as a poor quality biofuel and some mills treat it solely as a disposal problem. Our results show that electricity used for aerators in the wastewater treatment plant should be kept to the minimum required for sufficient reduction of dissolved organics. If more electricity is used, i.e. if more air is used for wastewater treatment, this will reduce the energy value of the sludge as the bio-sludge will be degraded. Biogas production using anaerobic co-digestion of pulp- and paper mill sludge together with either municipal wastewater treatment sludge or with manure and grass silage has been studied from several perspectives. It was found that anaerobic digestion is a feasible option for pulp and paper mill sludge management, provided that co-digestion with other substrates is used for nutrient supplementation.
Addis Ababa is one of the fastest growing cities where high urbanization becomes a challenge. Consequently housing shortage is a big problem of the city. The municipality has launched a huge Condominium Housing Programme in response to the housing problems. However, sanitary wastewater and solid waste management s are the critical problems to those houses. Thus, sanitary wastewater and kitchen organic solid wastes generated from condominium residences were collected and evaluated for its biogas production and fertilizer potential in order to solve the foreseen waste management problems. The physicochemical characteristics of the collected wastes were determined. A laboratory scale batch anaerobic co-digestion of both wastes with different mix ratio of 100% SWW: 0%KSW , 75%SWW: 25%KSW, 50%SSW: 50%KSW, 25%SWW: 75%KSW and 0%SWW: 100%KSW were carried out at ambient temperature for 30 days. Experimental results shows that the different metal ions and heavy metals expected in condominium house sanitary wastewater are within tolerable limits for anaerobic microorganisms. The highest total biogas yields were obtained from 25%SWW:75%KSW which is 65.6liter.
The Sugarcane Industry in Brazil is responsible for generation of different types of organic wastes. Bagasse and small share of straw have already been used as solid fuel in co-generation systems in general. Meanwhile, there are other kinds of by-products, as filter cake and vinasse, which have been completely unused from the energy point of view. The idea of converting such unused wastes into additional energy is gaining attention, especially driven by some Government commitments on increasing the renewable energy generation combined with the reduction of carbon dioxide emissions. The anaerobic digestion process is able to contribute with additional renewable energy production, in the form of electricity from biogas or even biomethane, keeping meanwhile the current practice of recycling the nutrients contained in these wastes on the sugarcane fields. However, for a successful application in industrial scale, the anaerobic digestion process must be carefully evaluated in terms of selection of appropriate inoculum, process kinetics, and plant design, among other aspects.