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Showing 1 to 20 of 57 for “"Water recovery"”.
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Advanced methods for droplet capture in water recovery systems and agricultural sprays
Water scarcity is one of the important challenges of our century. In this thesis, we investigate advanced methods to mitigate it in two ways: water recovery from fog and reducing chemicals runoff in agriculture. In the first part, we review current fog collector design and identify droplet …
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Preliminary Development of The Dialysis-Membrane-based Passive Biocide Delivery System for Spacecraft Water Recovery Units
… for the in-line dosing of silver ions to treated water in spacecraft water recovery units. The spacecraft environmental control and life support system community (ECLSS) are interested in adopting silver ions as a biocide in future spacecraft water recovery processes since silver ions are …
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Effect of permeation of discharge characteristics of capacitive deionization process
Cost-effective desalination of seawater can be a panacea for the growing freshwater crisis that ranks alongside the problems of shortage of viable energy resources and global warming in terms of its frightening global spread and magnitude. However, the energy guzzling nature of the existing …
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Use Patterns and Influencing Factors of Irrigation Best Management Practices in the Lower Mississippi River Basin
… end blocking, warped surface, and deep tillage), water flow control practices (computerized pipe-hole selection, multiple-inlet irrigation, surge irrigation, alternate wetting and drying, cutback irrigation, flow meters, and pump timers), water recovery/storage practices (tail-water recovery …
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Study of effect of process parameters and their interaction in the flotation of UG2 ore
… In order to optimise PGM and chromite grade and recovery in UG2 processing, a number of controls are available in a plant. Among the most important are froth height, air flow rate, depressant dosage and frother concentration. On an individual level, it is expected that an increase in froth height …
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Assessing the effect of cone ratio, feed solids concentration and viscosity on hydrocyclone performance
… metals of varying specific gravity, which makes recovery of the desired metal challenging. This study focussed on the effect of the hydrocyclone spigot to vortex finder diameter ratio, termed as the cone ratio, solids concentration and viscosity on the classification of two dual density ores. The …
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Sequence Stratigraphy and Resource Assessment of Aux Vases Sandstone in Illinois
… in delineating areas best for hydrocarbons and water recovery, highlighting potential problems in quarrying operations, outlining regions where calcareous lithologies of the Aux Vases Sandstone will interfere with Ste. Genevieve Limestone seismic reflection, and creating, in general, a better …
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Relationship between flotation operational factors and froth behaviour
… to investigate froth stability, with respect to, water recovery and top-of-froth bubble burst rate. Tests were conducted at different froth heights, superficial air rates and depressant dosages in a 2 m high Plexiglass column, using a PGM bearing UG2 ore from the Bushveld Igneous Complex. Four …
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The role of collectors in the flotation of partially oxidised copper ores
… used to assess the performance in terms of mass-water recovery, sulphur grade-recovery, copper grade-recovery and acid soluble copper grade-recovery relationships and the Klimpel rate constant for copper recovery. Flotation characteristics of bornite rich Carolusberg copper sulphide ore from …
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Performance and economics of monovalent selective electrodialysis desalination for irrigation
… for the treatment of irrigation source water and wastewater. Brackish groundwater, seawater, and agricultural effluent often contain both monovalent ions damaging to crops (Na⁺, Cl⁻) and divalent ions beneficial for crops (Ca²⁺, Mg²⁺, SO²⁻₄). RO removes both types of ions. These …
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Assessment of performance and efficiency of membrane distillation for treatment of impaired water and brine with high scaling potential
Water recovery is limited in pressure-driven membrane processes such as reverse osmosis (RO) and nanofiltration (NF) due to increase in scaling risk and osmotic pressure of the feed water with concentration. Membrane distillation (MD) is an emerging thermally-driven membrane desalination processes …
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Exploring Forward Osmosis Systems for Recovery of Nutrients and Water
Livestock wastewater contains a large amount of nutrients that are available for recovery. In this study, a proof of concept process based on forward osmosis (FO) was proposed and investigated for in-situ formation of struvite from digested swine wastewater. This FO system took advantage of a …
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An investigation into the impact of residual reagents on flotation in response to process water recirculation
… the mineral pulp phase of the flotation process, water makes up about 80-85% of the constituents, thus making water an important component. The increasing scarcity of water has resulted in greater environmental restrictions which have led to the necessity of mine operations recycling water from …
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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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Coupling Treatment Technologies with Bioelectrochemical Systems to Optimize Resource Recovery from Wastewater
Wastewater is a common waste produced from municipal, agricultural, and industrial processes. As the world’s population increases, the amount of wastewater produced globally is expected to reach approximately 450 billion m3 in the next two decades. Issues surrounding water, food, and energy …
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Irrigation Practice Adoption: Causes and Consequences in the Arkansas Delta
<p>Concerns about groundwater depletion from conventional irrigation agriculture in the Arkansas Delta region have led to the promotion of more efficient irrigation practices. With Arkansas being the largest producer of rice, the 10th largest producer of soybeans and the 16th largest producer of …
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Investigating the effect of frother type on froth structure, froth recovery and entrainment
… stability which has an effect on the grade and recovery of valuable minerals. The froth structure is dependent on amongst other factors the type of frothers used during the separation process. As a result, frother type and concentration can be used to manipulate the froth recovery and grade of …
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Development of a turbulent flotation model from first principles
… detachment by considering bubble coarsening and water recovery. The predictions from the overall flotation model are in general agreement with the results obtained in single-bubble flotation experiments and the flotation test results reported in literature. Since the model has been developed …
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The interactive effect of depressant type and dosage with frother dosage in the flotation of a PGE ore
… and entrained particles is reduced thus the recovery of other gangue minerals by entrainment increases and grade decreases. In the rougher float depressants are added to produce a manageable froth and improve the grade by reducing the overall amount of the naturally floating gangue in the …
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The effect of recycle water quality on the flotation of a Platreef ore
… today is to come up with strategies to maximize water resource utilisation. Water is a scarce resource, and every opportunity must be explored to maximize water conservation. Mining operations consume a lot of water for many activities including mineral processing, slurry transport, dust …
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