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Evaluation of composts for production of sod and groundcover crops /O'Brien, Tara A. 01 January 1995 (has links) (PDF)
No description available.
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Biogas Production from Organic Waste, Meat and FOG by Anaerobic Digestion and Ultimate Sludge DigestibilityUnknown Date (has links)
The anaerobic biodegradability of food waste (FW), meat waste and FOG (fats, oils
and greases) with municipal primary sewage sludge was assessed using a laboratory scale
anaerobic digester and by ultimate sludge digestibility, at mesophilic conditions by varying
the inoculum to feedstock ratio (1:2-1:10) and solids retention time (SRT). Preliminary
analysis assessed the anaerobic digestion of food waste and meat at a biogas production
over 30 days at 1000 mL and 1400 mL, respectively. The maximum methane yield was
0.18 m3/kg VS and 0.50 m3/kg VS for 1:10 in meat and FOG, respectively in 28 days with
56-61% volatile solids of destruction and first order methane generation rate of 0.15 d-1 for
both meat and FOG. The optimal ratio for meat and FOG was determined to be beyond
highest ratio tested (1:10), and longer SRT should be considered to investigate the impact
of feedstock on methane yield. Preliminary modeling suggests that for one 1.74 MG
digester, diverting just 0.6% of the food waste generated in one-third of Palm Beach
County could produce enough methane to power 130-360 homes for one full month. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2018. / FAU Electronic Theses and Dissertations Collection
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Anaerobic fermentation of organic wastes for chemical production by undefined mixed microbial culturesBolaji, Efeoluwa Omotola January 2018 (has links)
No description available.
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Anaerobic mixed culture fermentation of organic waste for the production of carboxylates, molecular hydrogen and ethanolDe Oliveira e Silva, Igor Maciel January 2018 (has links)
This thesis aimed at investigating a process based on anaerobic mixed culture fermentation (AMCF) of organic waste to produce carboxylates, molecular hydrogen and ethanol. The novelty of this study was to estimate the potential production of these bulk chemicals from selected renewable feedstocks and to experimentally investigate their production from the AMCF of three distinct types of feedstock without physicochemical pre-treatment: grass, a lignocellulosic substrate; cheese whey, a lactose-rich residue; and fish processing wastewater, a complex effluent containing proteins and fats. The estimation showed that AMCF of a small fraction (less than 1.6%) of the selected feedstock would be required to suffice the current production of carboxylates from oil-based feedstock, whilst up to 51% of the feedstock would be needed to satisfy the current production of ethanol and molecular hydrogen. In the experiments with AMCF of grass, low organic loading rates and long solids retention times were required to increase the substrate conversion because of the hard-biodegradability found in the substrate without any physicochemical pre-treatment. For the AMCF of cheese whey, the production of carboxylates decreased the pH to low levels and consequently inhibited the fermentation. For the AMCF of fish processing wastewater, the feedstock showed high biodegradability with production of biogas under batch condition and stable production of carboxylates under semi-continuous condition. The release of ammonium during the degradation of proteins was considered one of the main factors to avoid the pH drop when carboxylates were produced throughout the fermentation. In conclusion, the study showed that the feedstock nature and the operating condition play a key role in how to drive the AMCF to the production of these chemicals and avoid methanogenesis. Whilst hydrolysis limits the fermentation for hardly biodegradable feedstock, volatile fatty acids formation and pH inhibit the AMCF of more easily biodegradable feedstock.
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An experimental study of abattoir wastewater treatment from an economic perspective.Verhoef, Geoffrey D., mikewood@deakin.edu.au January 2002 (has links)
The most cost effective treatment scheme for effluent from Midfield Meats, an abattoir in Warrnambool, Australia, was evaluated via a series of laboratory and commercial scale experiments. Effectiveness was measured in terms of suspended solids (SS) and biological oxygen demand (BOD) reduction. Economic assessment was based on predicted reduction in trade waste charges versus infrastructure and running costs. From the range of potential treatment technologies, those deemed most appropriate for trialling included pre-screening, sedimentation, coagulation and flocculation treatment and dissolved air floatation (DAF). Prior to evaluation of treatment types, flow, loads and contaminant characterisation of the waste streams was conducted to aid in selection of treatment type and capacity. Prescreening was found to be the most cost effective, followed by sedimentation, coagulation and flocculation treatment and finally DAF. The most economical treatment scheme that satisfied the requirements of Midfield Meats included a combination of prescreening and sedimentation. DAF and coagulation and flocculation treatment satisfactorily treated the wastewater, however were not cost effective under the current trade waste agreement.
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Bisorption of uranium and thoriumTsezos, Marios January 1980 (has links)
The phenomenon of selective retention of cations from aqueous solutions by microbial biomass has been termed biosorption. Samples of waste microbial biomass, originating from industrial fermentations and biological waste water treatment plants, have been tested for their uranium and thorium biosorption potential. Optimum biosorption conditions have been identified. Rhizopus arrhizus was identified as the biomass presenting the highest U or Th uptake capacity, in excess of 170 mg/g. The effect of solution co-ions (namely Fe('+2), Zn('+2)) on the equilibrium biosorptive uptake capacity of Rhizopus arrhizus has been examined. The study of the rapid kinetics of U and Th biosorption has been initiated. Accumulated experimental and theoretical information led to the formulation of a biosorption mechanism hypothesis for the systems U or Th - Rhizopus arrhizus. Biosorption of both U and Th by Rhizopus arrhizus occurs mainly in the cell wall of the mycelium. Complexation by the cell wall chitin, adsorption, and hydrolysis of the complex are the processes participating in the proposed mechanism hypotheses.
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The growth and mineral contents of vegetables treated with composed livestock waste /Lee, Cheuk-hung, January 1994 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1995. / Includes bibliographical references (leaves 117-127).
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Social conflict and Kentucky bluegrass field burning in northern Idaho /Afatchao, Kodjotse. January 1900 (has links)
Thesis (Ph. D., Environmental Science)--University of Idaho, June 2009. / Major professor: J.D. Wulfhorst. Includes bibliographical references. Also available online (PDF file) by subscription or by purchasing the individual file.
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Assessing the effect of organic mulches with different carbon-nitrogen ratios on soil resource availability, ponderosa pine growth and chemical defenses /Lugo-Pérez, Javier. January 1900 (has links)
Thesis (Ph. D., Plant Science)--University of Idaho, December 2007. / Major professor: John E. Lloyd. Includes bibliographical references. Also available online (PDF file) by subscription or by purchasing the individual file.
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The autoclaving of municipal greenwastes as pre-treatment for use in soil enhancement /Kollaras, Arthur E. January 2006 (has links) (PDF)
Thesis (M.Phil.) - University of Queensland, 2006. / Includes bibliography.
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