Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 53 for “"organic wastes"”.
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The Chemical Forms and Plant Availability of Copper in Composting Organic Wastes
… EDTA extractable fraction, thought to determine organically complexed / chelatable metals (Amir, 2005). This continued until an equilibrium was reached and then the water and calcium nitrate extractable forms appeared to hold the excess. Copper as determined by these extracts would be available …
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A Comparative Study of Composted Organic Wastes and IBDU Fertilizer in Nitrogen Utilization by Bentgrass Cultivars
… was conducted to provide evidence that composted organic waste materials do provide comparable nitrogen absorption efficiency in relation to an organic slow release fertilizer. Western's compost facility supplied the two different organic wastes, which had been composted for 1 year. The materials …
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A Study of the Ecological Factors Influencing the Efficiency of the Activated Sludge System for Treating Organic Wastes
… of carbohydrate to replace a proportion of the organic load resulted in poor bio-flocculation with an increase in the carbohydrate content of the exocellular polymer and an increase in the water retention capacity. Rebalancing of the feed C:N ratio by the addition of urea resulted in a reduction …
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Evaluation of anaerobic membrane bioreactors and hydrothermal catalytic gasification for enhanced conversion of organic wastes to renewable fuels
… generate energy while removing particulates and organics in a single process. AnMBR studies with municipal wastewater have observed high COD removal rates typically in the range of 72 – 94%, and methane yields higher than can be achieved with conventional anaerobic digesters. In this paper, …
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An evaluation of biochemical oxygen demand of organic wastes by measurement of carbon dioxide evolution from aerated activated sludge
… the CO₂ liberated and the suspended solids or organic matter in the sludge. The apparatus functioned very well as could be readily seen from the consistent results obtained with the four units operating simultaneously.
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Pulse microwave mediated sample clean-up method to analyse trace metals, PCBs and pesticides, and for treatment of organic wastes
… wet ashing system. In wet ashing procedure organic matrix in biological tissues is digested in acid. This step must precede trace metal analysis by atomic absorption spectroscopy. Conventional wet ashing procedure using hot plate takes several hours. Digestion of animal and plant tissues by …
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Using Anaerobic Co-Digestion With Addition of Municipal Organic Wastes and Pre-Treatment to Enhance Biogas Production From Wastewater Treatment Plant Sludge
… first phase, the feasibility of using municipal organic wastes (synthetic kitchen waste (KW) and fat, oil and grease (FOG)) as co-substrates in anaerobic co-digestion was investigated. KW and FOG positively affected biogas production from anaerobic co-digestion, with ideal estimated …
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General reviews of electrochemical and corrosion phenomena under conditions associated with supercritical water oxidation
… promising technology for destroying highly toxic organic compounds present in aqueous waste streams. Organic wastes that have been identified as possible targets for destruction by SCWO include EPA-regulated organic wastes, organic components of DOE mixed low-level radioactive wastes, and DOD …
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Dewatering biosolids from a milk processing plant: Agricultural fibers as flocculant aids and ultrafiltration membrane concentration
Biosolids constitute a large portion of the total organic wastes produced by food plants each year. Disposal of these solids is a significant environmental problem. Biosolids contain between 30 and 45% protein; therefore, they can be recycled as animal food.
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Hydrogen-Rich Syngas Derived from Smouldering Biomass and Hydrocarbon Wastes
… energy efficient technology for destruction of organic wastes. The unique reaction zones created within a smouldering system have the potential to generate hydrogen if properly amended. For the first time, organic wastes were treated by an amended smouldering reaction to generate hydrogen in a …
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Gene cloning studies in two nocardioform bacteria
… are important in the biotransformation of organic compounds and the decomposition of organic wastes and are important medically. A gene cloning vector designated pLR591 was constructed from the broad host range, multicopy Streptomyces plasmid pIJ702 and the positive selection Escherichia …
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Valorization of banana peels to obtain a bioplastic from acetylated starch
… increase by 70% by 2050. Within this projection, organic waste will constitute 44% of the total. Among these organic wastes are banana peels, which can be valorized to be transformed into bioplastic. The objective of this research is to develop a bioplastic film on a laboratory scale, from the …
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Environmental consequences associated with ash-stabilisation of organic sludges from the synthol process
… for hazardous waste. Initially applied to inorganic wastes, S/S is now being investigated for the treatment of organic wastes and sludges. Challenges facing this venture into the SIS of organic wastes include the lack of technical information on waste-binder interactions, the uncertainty …
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An investigation into the use of smectitic clay soil for the containment and treatment of petrochemical waste
The manufacture, transport, use and disposal of organic chemicals may result in the release of significant quantities of organic substances into soil, from which they are subject to possible transport into underlying groundwater. Many of these organic chemicals are potentially toxic (Wilson et al., …
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Effects of Temperature on Anaerobic Lignin Degradation in Bioreactor Landfills
… leachate and/or adding additional liquid wastes, bioreactor landfills operate to rapidly degrade and transform organic wastes. The reactions within a bioreactor landfill create elevated temperatures. The intent of this study was to determine the effect of elevated temperature on the …
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Integrating bio-based resource recovery and treatment into municipal solid waste management in developing countries: a focus on anaerobic digestion
… be suitable in developing cities due the highly organic nature of their waste. AD entails the degradation of organic substances in the absence of oxygen, and its main products are CH 4-rich biogas and the remaining sludge. AD occurs in four main phases (hydrolysis, acidogenesis, acetogenesis and …
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Development of a seeding pellet system for use in soil conservation forestry
… to distribution with drones. Treatments included organic food industry waste streams or synthetic fertilizers, with biochar selected as a substrate, with pill capsules as containers or microbial biofilms and organic materials as binding agents. The trial was screened for both germination and plant …
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Molecular dynamics and self-diffusion in supercritical water
… Pc=221bar) is an innovative solvent to dissolve organic material. Many applications of this new solvent such as oxidation of organic wastes and separation of metals have been researched; however, the properties of SCW have not sufficiently been understood due to the difficulty in experimental …
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Recovering biomethane from fats, oils, and greases: Examining the impacts of microbial ecology on anaerobic codigester stability and bioconversion kinetics
… improve process economics for the treatment of organic wastes. Fats, oils, and greases (FOG) are desirable co-substrates for biomethane recovery because they have a substantially higher energy density than wastewater treatment solids or livestock manure. Yet, biomethane recovery from FOG …
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