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Showing 1 to 18 of 18 for “"water recirculation"”.
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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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Integrated process and control modelling of water recirculation in once-through boilers during low load and transient operation
… such as start-up and shutdown, the required water flow rate through the evaporator tubes of once-though boilers must be significantly higher than the evaporation rate to protect against overheating of the tubes until once-through operation is reached. Controlling the minimum required water …
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Estudio de prefactibilidad para la instalación de una planta de producción de dispositivos de recirculación de agua de uso doméstico
The device of water recirculation is a product that has a place in the Lima market to be offered as a way to support the environment by reducing consumption per capita that generates and return on investment that can bring you to contribute to savings by consumption of water and electricity in the …
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Sustainability of Residential Hot Water Infrastructure: Public Health, Environmental Impacts, and Consumer Drivers
Residential water heating is linked to the primary source of waterborne disease outbreaks in the United States, and accounts for greater energy demand than the combined water/wastewater utility sector. To date, there has been little research that can guide decision-making with regards to water …
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A radiocarbon method and multi-tracer approach to quantifying groundwater discharge to coastal waters
Groundwater discharge into estuaries and the coastal ocean is an important mechanism for the transport of dissolved chemical species to coastal waters. Because many dissolved species are present in groundwater in concentrations that are orders of magnitude higher than typical river concentrations, …
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A comparative study of conventional greens washers and a prototype system recycling wash water with a mathematical model of grit concentration in wash water
A prototype system with wash water recirculation was studied as a possible method of water conservation in the food processing industry. A conventional leafy-greens washer at the Exmore Foods Company, Incorporated, Exmore, Virginia, was compared with a prototype system. Spinach and turnip greens …
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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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Using computer simulation to reduce costs at a recirculating aquaculture facility
… 12 tanks by suggesting optimal values for the water replenishment rate, water recirculation rate, oxygen supply rate and feeds per day.
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Characterisation, Treatment and Utilisation of the Effluent from an Intensive Fish Farm
… control and management information on aspects of water quality in fish farming. The metabolic products produced by intensively farmed rainbow trout have been assessed and the production rates can be used to predict water quality. The water quality requirements of trout have been reviewed and …
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Calcium Carbonate Formation in Water Distribution Systems and Autogenous Repair of Leaks by Inert Particle Clogging
… carbonate (CaCO3) (i.e. scale) in potable water systems has long been a concern in water treatment and distribution. A literature review reveals that CaCO3 scaling issues are re-emerging due to climate change, temperature increases in hot water systems and lower use of scaling and corrosion …
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The effect of flotation reagents on the coagulation and dewatering of flotation tailings
Sustainable water management in mining operations is necessary due to South Africa's water scarcity, especially in PGM mining, where flotation tailings pose serious difficulties. Water constitutes 80-85% of the mineral pulp in the flotation process, emphasising the significance of its role. …
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Factors Influencing the Nitrification Efficiency of Fluidized Bed Filters With a Plastic Bead Medium
… in parallel to a reservoir containing 500 L of water. Systems were allowed to acclimate using a synthetic nutrient substrate, which was followed by a comparative analysis of biofilter performance. To evaluate filter performance, ammonia inflow concentration, ammonia loading rates, nitrite, …
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Interplay of Water Chemistry and Entrained Particulates in Erosion Corrosion of Copper and Nonleaded Alloys in Potable Water Systems
… corrosion of plumbing materials in domestic water systems is a complex phenomenon driven by water quality, hydrodynamic and electrochemical factors. Erosion corrosion accounts for over a third of copper hot water system failures in the U.S., hundreds of millions in damage, and may be expected …
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Studies of aquatic micro-organisms in domestic swimming pools
… Lancashire, England. The planktonic phase of the water was sampled using a standard fluid grab technique and the submerged surfaces (e.g. the pool lining, the steps and the water recirculation trap) were sampled using swabs and a scalpel blade to scrape the surface. Using these techniques, …
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IoT and machine learning approach for the determination of optimal freshwater exchange rate in aquaponics
… resource efficiency. Due to constraints in land, water, and energy availability, controlled environment production systems such as aquaponics are gaining attention as integrated approaches to producing fish and plants. While aquaponics is widely recognised for its efficient water reuse, recent …
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An investigation of some key physico-chemical water quality parameters of an Integrated Multi-Trophic Aquaculture (IMTA) system operating recirculation methodology in the Western Cape of South Africa
… of abalone farms) and a desire to recirculate water whilst reducing the environmental footprint of the abalone farms. The growing prevalence of IMTA as a commercially viable activity has brought about a need for an expansion of the knowledge pool regarding the physico-chemical processes at work …
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Microbiome associated with Ulva lacinulata and seawater in an integrated abalone (Haliotis midae)–Ulva system with partial recirculation
… D-ended raceways to bioremediate farm effluent water, allowing water to be recirculated back to the abalone, while Ulva is often used as a supplementary feed source. Despite Ulva's versatility in integrated multi-trophic aquaculture (IMTA) systems, there are biosecurity concerns with the …
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Beyond Water Regulation: Contamination of Private Wells, Citizen Science, and Corrosion of Household Plumbing
The US Safe Drinking Water Act (SDWA), established in 1974, has improved water quality nationwide through the introduction of maximum contaminant levels, source water protection, and treatment guidelines and requirements. Despite the obvious success many important water quality issues are not …