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 15 of 15 for “"Biowaste"”.
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Towards transportation fuels via hydrothermal liquefaction of biowaste
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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The coagulation of wastewater using biowaste materials as coagulants
Submitted in fulfilment of the requirements for the degree of Master of Engineering, Durban University of Technology, Durban, South Africa, 2025.
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Experimental and modeling study for hydrothermal liquefaction of wet biowaste
… potential large-scale application of wet biowaste hydrothermal liquefaction (HTL) process. Experiments in lab scale and pilot scale are conducted to investigate the reaction mechanism and overcome technical challenges. Technoeconomic analyses are performed to understand the economic …
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Reaction mechanisms of hydrothermal liquefaction of model compounds and biowaste feedstocks
It has been demonstrated that hydrothermal liquefaction (HTL) could be an efficient technology that can not only reduce COD and pollutants in the bio-wastes but also generate valuable renewable bio-crude oil from many biomass sources. Previously, swine manure has been successfully converted into …
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Upgrading hydrothermal liquefaction biocrude oil from wet biowaste into transportation fuel
… to upgrade biocrude oil converted from wet biowaste via hydrothermal liquefaction (HTL). Three types of feedstocks (algae, swine manure, and food processing waste) were converted into biocrude oil via HTL for upgradation processes, which includes pretreating feedstocks, separation, …
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Towards Knowledge Representation of the Biowaste-to-Chemicals Domain Using Knowledge Graphs
… model by integrating potentially net-zero biowaste resources to produce chemicals, replacing traditional fossil feedstocks. This thesis lays the groundwork for addressing a critical research question: What pathways from biowaste to value-added chemical are the most sustainable, and how can …
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Dual biopolymer production and separation from cultures of Bacillus spp.
… the strain Bacillus subtilis OK2. Selection of biowaste for the dual production was conducted using four biowastes; rapeseed cake, wheat bran, Spirulina powder and orange peel; using four pre-treatment methods, acid treatment, alkaline treatment, water infusion, and microwave exposure. γ-PGA …
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Hydrothermal gasification of human feces as an alternative means of waste mitigation and hydrogen production
… different gasification processes, especially for biowaste. The first section of this study compares the different gasification agents used in the gasification process. Specifically, steam is chosen as a particularly promising gasification agent and is compared with other gasification agents …
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Co-gasification of biomass and plastic waste in a bubbling fluidized bed reactor
… industry are all considered major producers of biowaste. Co-gasification is considered one of the most promising methods of chemical recycling that targets the production of syngas (hydrogen and carbon monoxide) and light hydrocarbon gases. In this study, the gasification of pure birch sawdust …
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Hydrothermal and ionothermal carbon structures
… the applicability of the HC model to “real” biowaste i.e. watermelon waste as feedstock for the production of useful materials. In part two cyano - containing ionic liquids are employed as precursors for the synthesis of high - performance, heteroatom - containing carbon materials. By varying …
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Computational fluid dynamics modeling of a continuous tubular hydrothermal liquefaction reactor
… in the technology. It involves the conversion of biowaste and algae into hydrocarbon fuels at elevated temperature and pressure. However, E2-Energy is not yet commercially feasible due to a lack of reliable, up-scaled HTL equipment despite its promising prospective. Improving the efficiency of the …
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The application of ultrasound in the bioconversion of brewer’s and distiller’s spent grains to bioethanol
… represents a readily available biowaste material for biofuel generation. The brewing and distilling industries in particular are uniquely placed to exploit the conversion of lignocellulose to bioethanol, through the utilisation of the millions of tons of spent grains produced …
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Grape marc biochar as a soil amendment: Potential for improving soil fertility, vine nutrition, and carbon sequestration: A thesis submitted in partial fulfilment of the requirements for the Degree of Master of Science at Lincoln University
Agricultural activities generate large volumes of biowaste that can pose significant environmental challenges if poorly managed. In viticulture, grape marc is a major by-product, and inappropriate disposal can contribute to soil and water contamination, air pollution, and greenhouse gas emissions. …
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Treatment of post hydrothermal liquefaction wastewater and suitability for hydroponic lettuce production
The hydrothermal-liquefaction of biowaste into biocrude oil has the potential to address the food-energy-water (FEW) nexus in junction with food production and water filtration using the wastewater from the process. This aqueous byproduct of the HTL process, post-hydrothermal liquefaction …
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Utilisation des composts de biodéchets ménagers pour l'amélioration de la fertilité des sols acides de la province de Kinshasa (République Démocratique du Congo)
This work is part of the research for appropriate methods for sustainable management of the sandy soils of the province of Kinshasa (Democratic Republic of Congo), in order to ensure and guarantee the adequate food security. It consists of a scientic research of the use of composts produced from …