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oapen-20.500.12657-579972023-02-01T09:01:49Z Jar Tests for Water Treatment Optimization Pivokonský, Martin Novotná, Kateřina Čermáková, Lenka Petříček, Radim Science Environmental Science Science Applied Sciences Technology & Engineering Mining bic Book Industry Communication::T Technology, engineering, agriculture::TQ Environmental science, engineering & technology bic Book Industry Communication::P Mathematics & science::PD Science: general issues::PDG Industrial applications of scientific research & technological innovation bic Book Industry Communication::T Technology, engineering, agriculture::TT Other technologies & applied sciences::TTU Mining technology & engineering The book is intended as a handbook providing detailed instructions for the correct conducting of jar tests, which are needed for the optimisation of the coagulation/flocculation process. It contains the essential theoretical background of coagulation/flocculation, including a description of the influence of different parameters on the coagulation efficiency of various impurities (e.g. pH value and type/dose of coagulant), and floc properties and their separation (e.g. mixing intensity, mixing time, but also type/concentration of coagulant and impurities). The principle of jar tests is explained and parameters possible to optimize (i.e. coagulation pH, coagulant dose, flocculation aid dose, mixing intensity and mixing time) are discussed. Laboratory equipment for jar tests is proposed, including mixers and instructions for calculating a mixing intensity (necessarily expressed by the global shear rate/velocity gradient G). Mixing intensities for various purposes are recommended. Detailed practical instructions of how to perform jar tests follow, including a determination of the dose of reagents for pH adjustment and coagulant dose, dosing sequence, floc separation after jar tests by sedimentation and/or centrifugation simulating sand filtration, sampling, measuring necessary parameters (pH, coagulant residuals, alkalinity, residual impurity concentrations etc.), data recording, data processing and jar test evaluation (with specific examples). The handbook also contains a supplementary part with tables for conversion of the molar to mass concentration (and vice versa) of coagulants, and instructions for diluting coagulants and reagents for pH adjustment. 2022-08-18T05:36:12Z 2022-08-18T05:36:12Z 2022 book 9781789062694 https://library.oapen.org/handle/20.500.12657/57997 eng application/pdf n/a external_content.pdf IWA Publishing IWA Publishing https://doi.org/10.2166/9781789062694 https://doi.org/10.2166/9781789062694 dc3cfe72-8424-48e6-b8e0-fca2844ba38e b818ba9d-2dd9-4fd7-a364-7f305aef7ee9 9781789062694 Knowledge Unlatched (KU) IWA Publishing Knowledge Unlatched open access
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The book is intended as a handbook providing detailed instructions for the correct conducting of jar tests, which are needed for the optimisation of the coagulation/flocculation process. It contains the essential theoretical background of coagulation/flocculation, including a description of the influence of different parameters on the coagulation efficiency of various impurities (e.g. pH value and type/dose of coagulant), and floc properties and their separation (e.g. mixing intensity, mixing time, but also type/concentration of coagulant and impurities). The principle of jar tests is explained and parameters possible to optimize (i.e. coagulation pH, coagulant dose, flocculation aid dose, mixing intensity and mixing time) are discussed. Laboratory equipment for jar tests is proposed, including mixers and instructions for calculating a mixing intensity (necessarily expressed by the global shear rate/velocity gradient G). Mixing intensities for various purposes are recommended. Detailed practical instructions of how to perform jar tests follow, including a determination of the dose of reagents for pH adjustment and coagulant dose, dosing sequence, floc separation after jar tests by sedimentation and/or centrifugation simulating sand filtration, sampling, measuring necessary parameters (pH, coagulant residuals, alkalinity, residual impurity concentrations etc.), data recording, data processing and jar test evaluation (with specific examples). The handbook also contains a supplementary part with tables for conversion of the molar to mass concentration (and vice versa) of coagulants, and instructions for diluting coagulants and reagents for pH adjustment.
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