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 41 for “"Water recycling"”.
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Dishwashing Water Recycling System and Related Water Quality Standards for Military Use
As the demand for reliable and safe water supplies increases, both water quality and available quantity are being challenged by population growth and climate change. Greywater reuse is becoming a common practice worldwide; however, in remote locations of limited water supply, such as those …
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The effect of ion accumulation owing to water recycling on flotation performance
With the drive to reduce water usage globally, the mining sector must reassess its water usage as it has in the past contributed greatly to environmental degradation due to effluent discharge, tailing disposal and process water seepage into the water-table. Mineral beneficiation entails different …
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Factors required to enhance water recycling at two major Australian industrial manufacturing sites
… study presents the application of an integrated water management strategy at two large Australian manufacturing companies that are contrasting in terms of their respective products and wastewater generation. The integrated strategy, consisting of water audit, pinch analysis and membrane process …
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Horticultural Producers' Willingness to Adopt Water Recycling Technology in the Mid-Atlantic Region
Water-recycling technologies have been developed to reduce water consumption and surface runoff in horticultural operations. However, WRT may increase risk of disease from water-borne pathogens such as Pythium and Phytophthora. More information is needed about producers' management practices and …
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EXAMINING THE USER EXPERIENCE IN CLIMATE-ADAPTIVE POLICIES: TUCSON ARIZONA'S RESIDENTIAL GRAY WATER RECYCLING
… explores Tucson Arizona’s Residential Graywater Ordinance (RGWO) (a building ordinance intended to reduce potable water use) as a case study example of a climate-adaptive policy. The effectiveness of the RGWO was evaluated through nine in-depth stakeholder interviews and the surveying 57 …
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The effect of microbial load and water recycling on the flotation performance of a PGM bearing ore
Mineral processing requires large quantities of water for its operations. With the continuing move to reduce freshwater withdrawal and mine water discharge, the mineral industry has been applying water recycling and reuse to improve water use efficiency. Previous studies on the use of remediated …
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Thin Stillage Fractionation to Improve Water Recycling Rates and Heat Transfer Characteristics in the Corn Dry Grind Process
We considered application of optimization to the design and operation of a continuous microfiltration (MF) system for the corn dry grind process. Total area requirement decreased with number of stages but there was tradeoff between higher capital costs involved at higher number of stages. Optimal …
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Frac flowback water blending and treatment requirements based on spatial and temporal water quality analysis
Because of the large amount of wastewater generated with oil and gas production and the complex components of produced water, associates in the human health and environmental disciplines consider the treatment and reuse of produced water as a central issue for the petroleum industry. At present, …
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Evaluation of a solid-liquid manure separation operation
… nutrient management, the potential for nutrient/water recycling based on filtration, and barn construction and operating costs. A full-scale barn in Missouri was closely monitored to perform these objectives. Laboratory scale pretreatments and filtrations were conducted to evaluate the …
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Effect of pH on the denitrification of activated sludge effluent at high oxygen tensions
… there is both an essentially constant supply of water and an increasing demand for water. This calls for water recycling. or reuse, as a means of meeting the demand for potable water. An accumulation of impurities, such as compounds of nitrogen, can limit the recycling of water. One such …
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Green and Grey: Water Justice, Privatization, and Resistance
… Describing global trends toward privatization of water supply systems and the criminalization of several water conservation activities and tactics, this paper employs theoretical perspectives offered by green, cultural, and critical criminologies, focusing on overt resistance to water …
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Self sufficient urban architecture: reducing reliance on traditional sources for basic necessities
… feature demonstrated by the farm is its water conservation practices. Through the implementation of a simple water recycling system, the farm eliminates its dependence on municipal water sources. This noteworthy achievement inspires the incorporation of water-efficient fixtures in …
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A potential energy-saving heat treatment for re-circulated irrigation water and its biological mechanisms
Heat pasteurization is an effective water treatment to address the emerging plant pathogen issue associated with increased water recycling practices in the ornamental horticulture industry. The current protocol that recommends treating water at 95"C for 30 s, however, faces two major challenges: …
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Essays on Environmental Economics with a Focus on Non-market Valuation
… projects in the area of Environmental Economics: water-recycling technology adoption and its cost-effectiveness in the U.S. horticulture industry (in Chapter 2), and urban tree cover's impact on residential location decision making in Milwaukee, WI (in Chapter 3). Chapter 2 evaluates the economic …
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Systemic implementation of Vertical Greenery Systems
… provide information on the thermal impacts and water requirements of VGS, there is a need for process-based, standardized assessment methods that can be applied to different locations, building morphologies, and VGS designs. This thesis aims to provide transferable process-based calculation …
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Understanding consumers' ornamental plant preferences for disease-free and water conservation labels
… two key issues; plant disease and irrigation water use. A choice modeling survey was utilized to estimate consumers' willingness to pay a premium for six ornamental plants with disease-free and/or water conservation certification labels. The results of the mixed logit models show consumers are …
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What Is The Economic Feasibility Of Implementing Grey Water Infrastructure At The Citywide Level?
… and economic feasibility of implementing grey water recycling systems at a citywide scale. Past and present conditions of fresh water scarcity are discussed, and how scarcity will be exacerbated by climate change. Previous technological developments and initiatives are discussed, and how they …
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Post-Closure Silica Transport in the Proposed High Level Radioactive Waste Repository at Yucca Mountain, Nevada
… Although the region is very arid, enough water exists in the tuffs to create a vapor dominated geothermal system as the pore water evaporates, circulates and recondenses. This study examines how silica leaching might occur as a result of water-tuff interactions in Yucca Mountain after the …
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Recirculated Process Water in the Flotation of Sulfides
Water scarcity has affected the availability, quality, and quantity of water available for use at water-intensive mineral processing concentrator plants. In response, more sustainable water reuse strategies have gained traction and proved beneficial by reducing used water effluents and freshwater …
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Efficacy of Catalytic Ozonation Advanced Oxidation Processes Compared to Traditional Ozone-Based Advanced Oxidation Processes for Degradation of Recalcitrant Compounds
… With the world’s population increasing and water becoming a scarce resource, it is important to improve current water recycling methods. Recycling water will play a large role in accommodating the increasing demand, but it will also be necessary to be improve the level of treatment in order …
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