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|b M344 2014eb
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|a UAMI
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|a Maher, Chris.
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|a Solids role in tertiary chemical phosphorus removal by alum /
|c Chris Maher, J.B. Neethling, Krishna Pagilla.
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|a London :
|b IWA Publishing :
|b [distributor] Portland Customer Services :
|b [distributor] CoInfo Book Services,
|c 2014.
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|a 1 online resource
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| 336 |
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|a text
|b txt
|2 rdacontent
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|a computer
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|a online resource
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|a Electronic book text.
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|b The need to control and remove phosphorus (P) in discharges from waste water treatment facilities (WWTF) to prevent eutrophication of receiving waters is well known. Regulatory initiatives are further contributing to the addition of stringent P limits to discharge permits. Accordingly, many agencies are facing increasingly stringent standards of effluent P and as a result the effluent limit of 0.1 mg P/L total phosphorus (TP) or lower is being achieved. Since the reliable performance limit of enhanced biological phosphorus removal (EBPR) is commonly accepted at about 0.1 mg P/L in the dissolved form, these facilities will need to utilize tertiary chemical phosphorus removal (CPR) to reliably achieve limits lower than 0.1 mg P/L (ultra-low limits) (Pagilla and Urgun-Demirtas, 2007). The mechanistic basis for P removal using chemical precipitant addition is generally considered to be more than simple precipitation. The role of adsorption and/or surface complexation in removal of reactive or unreactive phosphorus to the already formed chemical precipitates or complexes has been reported. Omoike and VanLoon (1999) showed that the most likely mechanism involves sorption of P species on Al(OH)3(s) formed by Al salt addition to water for P removal, and further precipitation/complexation of P onto the Al hydroxyl precipitate for additional P removal. In tertiary P removal, usually a non-stoichiometric dose or several times stoichiometric dose of the precipitant is needed. The chemical precipitates formed upon addition of such high doses of chemical precipitant are likely to serve as nuclei for further aggregation of newly formed precipitates, thus enhancing the overall tertiary P removal. The excess precipitant added to the secondary effluent produces hydroxyl precipitates which could serve as adsorbents for additional P removal. It is well proven that alum sludge from water treatment plants have high capacity for wastewater effluent P removal depending on their structure and/or age of the sludge solids. The role of mixing, pH, contact time, precipitated solids concentration in the mixing tank, and feed secondary effluent characteristics could influence this process of tertiary P removal. The investigation of such variables and the process along with careful analytical measurements would explain the basis for precipitation/solids contact P removal from wastewater effluents. Such information could be used to enhance the process and optimize the operating conditions of tertiary P removal by chemical addition. This paper presents full scale and lab scale investigations of some of the above listed parameters on tertiary P removal with specific focus on role of precipitated solids in enhancing P removal and/or reducing the dose of precipitant to be added to achieve the desired P removal. The study was conducted at the Iowa Hill Water Reclamation Facility (WRF) and Farmers Korner WWTF in Breckenridge, CO, and at the Illinois Institute of Technology.
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|a Includes bibliographical references.
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|a Cover; Copyright; Acknowledgments; Abstract and Benefits; Table of Contents; List of Tables; List of Figures; List of Abbreviations and Acronyms; Executive Summary; Chapter 1.0: Introduction; Chapter 2.0: Full-Scale Investigations; 2.1 Full-Scale Materials and Methods; 2.1.1 TSS Determination and SRT Calculation; 2.1.2 P Analysis; 2.2 Full-Scale Results and Discussion; 2.2.1 Effect of SRT in Full-Scale Tertiary CPR Process; 2.2.2 Effect of Point of Solids Recycle in CPR Process; 2.2.3 Operating Curves for Different Chemical Sludge Return Locations; Chapter 3.0: Lab-Scale Investigations -- UBSD
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|a 3.1 Materials and Methods3.1.1 Plant Process Description; 3.1.2 Sample Preparation and Experimental Procedure; 3.1.3 Adsorption Isotherm Trials; 3.1.4 Kinetic Trials; 3.2 Results and Discussion; 3.2.1 Adsorption Isotherm; 3.2.2 Kinetics; 3.2.3 Temperature Effects; 3.2.4 Age Effects; 3.2.5 An Alternate Alum Sludge; 3.2.6 Effect of Additional Alum Dose on P Removal; Chapter 4.0: Lab-Scale Investigations -- IIT; 4.1 Materials and Methods; 4.1.1 Selected Treatment Plant Process Descriptions; 4.1.2 Preservation and Characterization of the FKWWTF Alum Sludge
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|a 4.1.3 Preservation and Characterization of Stickney and Calumet WRP Primary and SEs4.1.4 P Removal from Stickney WRP Effluent Using FKWWTF Sludge; 4.1.5 Influence of Using Sludge with and Without Polymer; 4.1.6 Influence of Sludge Aging -- Old versus Fresh Sludge; 4.1.7 Dosage and Test for Reaching a Removal Goal; 4.2 Results and Discussion; 4.2.1 Characterization of the FKWWTF Alum Sludge; 4.2.2 Characterization of Stickney and Calumet WRP Primary and SEs; 4.2.3 P Removal from Stickney WRP Effluent Using FKWWTF Sludge; 4.2.4 Dosage and Tests for Reaching a Removal Goal
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| 590 |
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|a ProQuest Ebook Central
|b Ebook Central Academic Complete
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| 650 |
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|a Environmental sciences.
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| 650 |
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|a Sciences de l'environnement.
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| 650 |
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|a environmental sciences.
|2 aat
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| 650 |
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|a Environmental sciences
|2 fast
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| 700 |
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|a Neethling, J. B.
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| 700 |
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|a Pagilla, Krishna.
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| 758 |
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|i has work:
|a Solids Role in Tertiary Chemical Phosphorus Removal by Alum (Text)
|1 https://id.oclc.org/worldcat/entity/E39PCXhkRbfFmyvw8wDY87DJfy
|4 https://id.oclc.org/worldcat/ontology/hasWork
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|i Erscheint auch als:
|n Druck-Ausgabe
|a Neethling, J.B. Solids Role in Tertiary Chemical Phosphorus Removal by Alum .
|t WERF Research Report Series
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| 856 |
4 |
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|u https://ebookcentral.uam.elogim.com/lib/uam-ebooks/detail.action?docID=3121232
|z Texto completo
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|a BATCHLOAD
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|a Askews and Holts Library Services
|b ASKH
|n BDZ0025043972
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|a ProQuest Ebook Central
|b EBLB
|n EBL3121232
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| 994 |
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|a 92
|b IZTAP
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