Municipal and Home Water Softening
نویسندگان
چکیده
منابع مشابه
GA in Municipal Water Systems
EDITORIAL Editorial I hope you had a good start in 2007. GECCO surely had. With 577 submissions, GECCO-2007 has beaten the 2005 record of 550 submissions by 4.4%. And there are still many events for which the submission is still open: the 16 workshops (the deadline is March 23rd), the late-breaking papers track (the deadline is April 28th), and the human competitive, the " Humies " , awards (th...
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A nonlinear chemical/physical dynamic model in the form of partial differential equations was adopted and further developed to serve as a basis for model predictive control of a pellet reactor for drinking water softening. The model was calibrated using full-scale process measurements. A linear predictive controller based on a lineralization of the model has been designed to achieve the desired...
متن کاملReuse of water treatment residuals from lime softening, Part I: Applications for the reuse of lime sludge from water softening
Lime sludge, an inert material mostly composed of calcium carbonate, is the result of softening hard water before distribution as drinking water. A large city such as Des Moines, Iowa, produces about 32 000 tons of lime sludge (dry-weight basis) annually. This is about half of the lime sludge produced in Iowa per year in eight different cities, and these cities currently have 371 800 tons (dry-...
متن کاملBiomineralization of Calcium and Magnesium Carbonate Minerals Induced by Bacillus licheniformis and Its Application in Water Softening Short title: biomineralization induced by bacteria and application in water softening
Reducing the hardness of hard water is of great concern nowadays due to some adverse effects on water pipes, boilers and soap consumption. Using the method of biomineralization to precipitate calcium and magnesium ions to become carbonate minerals was one of the most important innovations for reducing the hardness of hard water. The present study sought to explore the physical and chemical cond...
متن کاملModeling and Simulation of Water Softening by Nanofiltration Using Artificial Neural Network
An artificial neural network has been used to determine the volume flux and rejections of Ca2+ , Na+ and Cl¯, as a function of transmembrane pressure and concentrations of Ca2+, polyethyleneimine, and polyacrylic acid in water softening by nanofiltration process in presence of polyelectrolytes. The feed-forward multi-layer perceptron artificial neural network including an eight-neuron hidde...
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ژورنال
عنوان ژورنال: Journal - American Water Works Association
سال: 1953
ISSN: 0003-150X
DOI: 10.1002/j.1551-8833.1953.tb20151.x