Download or read book Computer Operation and Monitoring for a Dairy Manure Anaerobic Digester written by Scott Andrew Shore and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Manure Treatment Technologies Anaerobic Digesters written by Deanne Meyer and published by University of California, Agriculture and Natural Resources. This book was released on 2011 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increased awareness and regulation of dairy waste products have spawned a variety of technical innovations, including anaerobic digesters, which use bacteria to make a useful biogas fuel from animal waste products.
Download or read book Evaluation of a New Stability Monitoring Method for Anaerobic Digestion of Dairy Manure and Vegetable Waste written by Eric J. Wight and published by . This book was released on 1994 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Operation and Monitoring of an On farm Anaerobic Digester written by Mark C. Schlueter and published by . This book was released on 1987 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dairy Farm Manure Management written by Joe Makuch and published by . This book was released on 1995 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Evaluation of the Barriers to Anaerobic Digestion Technology Implementation for Energy Production and Waste Stabilization on Dairy Farms written by Joseph G. Usack and published by . This book was released on 2016 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anaerobic digestion is an established technology used for energy production (as biogas), organic waste stabilization, and nutrient recovery. This technology has been successfully implemented by municipal and industrial wastewater treatment facilities for decades. Dairy farming operations are energy intensive, require considerable nutrient inputs, and generate large quantities of organic residues, which without proper treatment, cause greater environmental damage. Thus, anaerobic digestion seems particularly suited for use on dairy farms, however various barriers exist, which have limited its widespread adoption. The central aim of this thesis was to evaluate these barriers. In the first study, a general methodology was developed explaining how to properly construct, inoculate, operate, and monitor laboratory-scale anaerobic digesters during long-term experiments. The second study focused on improving the design of low-cost, plug-flow anaerobic digester systems deployed in Indonesia, whose tendency to clog discouraged their continued use by village operators. Operational modifications allowing either internal mixing or effluent recycling were shown to reduce the level of solids retained within the digester while maintaining comparable methane yields, which may translate to fewer clogging incidences at scale. In the third study, three substrates: 1) food waste; 2) alkaline hydrolysate; and 3) crude glycerol were individually codigested with dairy manure to identify the substrate-specific qualities that ultimately destabilized the anaerobic digestion process. Food waste co-digestion did not cause any appreciable reduction in process performance. However, alkaline hydrolysate co-digestion was ultimately inhibited by unionized ammonia toxicity. Crude glycerol co-digestion became unstable at higher organic loading rates due to foaming induced by long-chain fatty acid accumulation. In the fourth study, an environmental life-cycle and techno-economic assessment (LCA-TEA) with uncertainty analysis was performed to evaluate the impacts of co-digestion on dairy farms. Co-digestion scenarios involving ten unique co-substrates were evaluated over a range of mixture ratios. While economically favorable, high loading rates reduced the technical performance of the digester and caused proportionally greater environmental emissions on the farm, particularly for co-substrates characterized by high nutrient loads and low organic strength. Gate-fees were the main driver behind economic performance. Revenue associated with electricity production and fertilizer displacement were not sufficient to recoup capital and operational costs, yet their substitution led to significant net reductions in overall environmental impacts. The final study was built on the LCA-TEA model and investigated the feasibility of applying combined cooling, heat, and power (CCHP) production on dairy farms. Particular cooling applications were evaluated, including: 1) conductive cow cooling to mitigate heat stress; and 2) substitution of electricity-driven cooling cycles (e.g., milk chilling/refrigeration). Conductive cooling scenarios led to significant environmental impact reductions in categories associated with milk production, while substitution of electricity-driven cooling cycles contributed marginal reductions. Despite these environmental benefits, no one of the CCHP scenarios was economically viable. Opportunity to generate revenue from conductive cooling was limited by the number of heat stress episodes in New York, while the low value of electricity limited revenue from displaced electricity-driven cooling. This body of work suggests anaerobic digestion is technically viable and environmentally beneficial when properly implemented, however, high capital cost and the lack of high-value revenue streams constitute insurmountable barriers under current market conditions in the U.S.
Download or read book Report on the Design and Operation of a Full Scale Anaerobic Dairy Manure Digester Final Report written by and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Anaerobic Digestion of Poultry Manure written by Leonard Eldan Ripley and published by . This book was released on 1988 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report on the Design and Operation of a Full scale Anaerobic Dairy Manure Digester written by Solar Energy Research Institute and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Anaerobic Digestion of Dairy Manure written by Hui Wang and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anaerobic digestion (AD) is an efficient waste processing option for livestock operations, as it produces renewable energy while reducing the environmental impact of animal waste. However, economic limitations and inefficient operation cause failures and prevent wide adoption of AD technology. Experiments were conducted to evaluate the impact of operational factors and substrate additives on the performance of manure based anaerobic digesters. Results from the first chapter developed a mathematical equation relating density and TS content for both pre-digested and post-digested manure, providing a quick and simple method to estimate TS content. These equations could be used for pump selection, quick assessment for operational purposes, digester impacts, and models. Results from the second study showed that higher mixing speed (700 revolution per min) inhibited the biogas production rate, and longer mixing duration did not lead to higher methane production per unit of VS destroyed. The authors suggest mixing at low speeds in dairy manure ADs to prevents solids settling. The third chapter evaluated the impact of tannins on biogas production. Results shows that dietary tannin inhibited biogas production with increasing tannin additions. Total biogas production was reduced by 22% with 18 g kg-1 dietary tannin, while only 10% reduction resulted from feeding 4.5 g kg-1 dietary tannins. However, adding the same amount of tannin to the manure digester directly did not significantly reduce the biogas production. Results from the last study showed that wood additives did not have impact on methane production, but biochar that made from poplar wood chips reduced the H2S by 78%. Sulfate adsorption experiments suggested that the mechanism of removal was not likely to be sorption of the sulfate ion by biochar before it was converted to H2S by sulfur reducing bacteria. Biochar produced from 400°C and 700°C had no significant difference in adsorption capacity when used to remove H2S post production in the gas phase comparing with commercially available media, but biochars had a more rapid breakthrough time. Removal of H2S by biochar has the potential to reduce operating costs associated with AD systems and the biogas end use technologies.
Download or read book Quick Bibliography Series written by National Agricultural Library (U.S.). Reference Division and published by . This book was released on 1995 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bio nergie Compte Rendu Du Septi me S minaire Canadien de R D en Bio nergie written by Edmund Neal Hogan and published by . This book was released on 1989 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1980 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar Energy Update written by and published by . This book was released on 1981 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ammonia Speciation in Anaerobic Digesters written by Sasha Daniel Hafner and published by . This book was released on 2007 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Temperature and Feeding Mode on Digestion and Sanitation Efficiency During Multiple stage Anaerobic Treatment of Liquid Dairy Cattle Manure written by Mathias Effenberger and published by Cuvillier Verlag. This book was released on 2008 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy from Biomass written by and published by . This book was released on 1987 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
