Softening of drinking water by the pellet reactor - Effects of influent water composition on calcium carbonate pellet characteristics
نویسندگان
چکیده
منابع مشابه
Modeling and Predictive Control of Pellet Reactors for Water Softening
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...
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Pellet softening reactors are used in centralized and decentralized drinking water treatment plants for the removal of calcium (hardness) through chemically induced precipitation of calcite. This is accomplished in fluidized pellet reactors, where a strong base is added to the influent to increase the pH and facilitate the process of precipitation on an added seeding material. Here we describe ...
متن کاملModel-Based Dosing Control of a Pellet Softening Reactor
The control of a drinking-water treatment plant aims to produce the correct quantity of water, with a constant quality. Achieving constant water quality is not an obvious task, since the online water-quality measurements and possible control actions are limited. Applying model-based control improves disturbance rejection and online process optimisation. For the softening process step, the integ...
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ژورنال
عنوان ژورنال: Science of The Total Environment
سال: 2019
ISSN: 0048-9697
DOI: 10.1016/j.scitotenv.2018.10.157