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Author(s): John Bratby

Publication Date: 15/04/2016

Pages: 538

Binding: Hardback

ISBN13: 9781780407494

eISBN: 9781780407500

OverviewExpand or collapse me

Coagulation and Flocculation in Water and Wastewater Treatment provides a comprehensive account of coagulation and flocculation techniques and technologies in a single volume covering theoretical principles to practical applications.

Thoroughly revised and updated this new edition has been progressively modified and increased in scope to cater for the requirements of practitioners involved with water and wastewater treatment. 

New topics in this new edition include :

  • activated sludge bulking and foaming control and enhanced bioflocculation;
  • algae removal and harvesting;
  • dissolved organic nitrogen (DON) removal;
  • inorganics removal;
  • turbidity and its measurement;
  • wastewater treatment by coagulation and chemically enhanced primary treatment (CEPT).

The book presents the subject logically and sequentially from theoretical principles to practical applications. Successive chapters deal with, in turn, properties of materials present in waters and wastewaters; characteristics and types of coagulants commonly in use; mechanisms and practical implications of destabilization of waterborne material using metal coagulants and polyelectrolytes; considerations and requirements for coagulant addition at the rapid mixing stage; theoretical and practical considerations of flocculation; and details of experimental procedures for assessing primary coagulants, flocculant aids, sludge conditioners, and flocculation parameters. Numerous examples are included as appropriate.

Treatment and disposal of sludges resulting from coagulation-flocculation related operations is dealt with in an Appendix. This important topic has been separated from the main text to avoid disturbing the continuum of the presentation.

Coagulation and Flocculation in Water and Wastewater Treatment  is a readable and useful resource for the water scientist and engineer.   It is a convenient reference handbook providing numerous examples and appended information and it is a vital text for course material for undergraduate  and postgraduate students.

Contents

Stability and Destabilization; Definitions; Performance Criteria; Colloids and Interfaces; Origin of Surface Charge; Effect of Surface Charge; Adsorption; Inner Part of Electrical Double Layer; Diffuse Part of Electrical Double Layer; Stern’s Model of Complete Double Layer; Colloid Stability in Terms of the Double Layer; Electrokinetic Measurements      ; Metal Coagulants; Polymers; Treatment with Metal Coagulants; Destabilization of Hydrophobic Colloids; Destabilization of Hydrophilic Colloids; Removal of Natural Organic Matter; Algae Removal and Harvesting; Pathogen Removal; Effect of Anions; Chemical Phosphorus Removal in Wastewater Treatment; Dissolved Organic Nitrogen (DON) Removal in Wastewater Treatment;  Wastewater Treatment by Coagulation and Chemically Enhanced Primary Treatment, CEPT; Activated Sludge Bulking and Foaming Control and Enhanced Bioflocculation; Inorganics Removal; Arsenic Removal; Copper Removal; Fluoride Removal; Manganese Removal; Staged Coagulation and Sequencing; Effects of Preozonation; Effects of Temperature; Residual Aluminum; Treatment with Polymers; Mechanisms of Destabilization; Polyelectrolytes as Primary Coagulants; Polyelectrolytes as Flocculant Aids; Polymers as Sludge Conditioners; Rapid Mixing; Requirements for Rapid Mixing Devices; Design of Rapid Mixing Devices; Flocculation; Perikinetic Flocculation; Orthokinetic Flocculation; Design of Different Types of Flocculation Basins and Devices; Testing and Control of Coagulation and Flocculation; Optimizing Primary Coagulant Type, Dosage and pH; Using the Jar Test to Evaluate Settling; Evaluating Flocculant Aids; Evaluating Sludge Conditioners; Optimizing Flocculation Parameters; Control Systems for Coagulation; Turbidity and its Measurement;  Processing and Disposal of Coagulant Sludges.

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