Effect of Aluminium Salt Dosing on Activated Sludge Settleability Indicators: A New Settleability Model Development
There has been a significant rise in the use of aluminium salts (Al3+) for the chemical precipitation of phosphates in wastewater treatment plants due to growing stricter regulatory requirements for wastewater effluent release to the environment. The modelling of the settleability of the resultant A...
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| Veröffentlicht in: | Water (Basel) 2019-01, Vol.11 (1), p.179 |
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| description | There has been a significant rise in the use of aluminium salts (Al3+) for the chemical precipitation of phosphates in wastewater treatment plants due to growing stricter regulatory requirements for wastewater effluent release to the environment. The modelling of the settleability of the resultant Al3+ sludge in present engineering practice for design and optimisation are still based on conventional sludge settleability models. This paper describes a novel activated sludge settleability model which is designed to analyse the effects of Al3+ dosing on activated sludge settleability indicators, zone settling velocity (ZSV), and stirred specific volume index (SSVI). The impact of Al3+ dosing concentrations on ZSV and SSVI of full scale activated sludge plant were analysed in the laboratory over a three years’ period and the exponential form of the Vesilind equation was optimised and validated to include alum chemical dosing parameters. The proposed model equation was found to effectively describe the settleability of Al3+ dosed sludge for dosing concentrations range of 0 to 100 mg/L. |
| doi_str_mv | 10.3390/w11010179 |
| format | Article |
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The modelling of the settleability of the resultant Al3+ sludge in present engineering practice for design and optimisation are still based on conventional sludge settleability models. This paper describes a novel activated sludge settleability model which is designed to analyse the effects of Al3+ dosing on activated sludge settleability indicators, zone settling velocity (ZSV), and stirred specific volume index (SSVI). The impact of Al3+ dosing concentrations on ZSV and SSVI of full scale activated sludge plant were analysed in the laboratory over a three years’ period and the exponential form of the Vesilind equation was optimised and validated to include alum chemical dosing parameters. The proposed model equation was found to effectively describe the settleability of Al3+ dosed sludge for dosing concentrations range of 0 to 100 mg/L.</description><identifier>ISSN: 2073-4441</identifier><identifier>EISSN: 2073-4441</identifier><identifier>DOI: 10.3390/w11010179</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Activated sludge ; Alum ; Aluminum ; Chemical precipitation ; Design optimization ; Efficiency ; Effluent quality ; Effluents ; Ethylenediaminetetraacetic acid ; Eutrophication ; Indicators ; Nutrient removal ; Organic chemistry ; Phosphates ; Phosphorus ; Precipitation ; Purification ; Salts ; Sedimentation & deposition ; Settling velocity ; Sewage ; Sludge ; Sludge settling ; Specific volume ; Velocity ; Wastewater treatment ; Wastewater treatment plants ; Water pollution control ; Water treatment ; Water treatment plants</subject><ispartof>Water (Basel), 2019-01, Vol.11 (1), p.179</ispartof><rights>COPYRIGHT 2019 MDPI AG</rights><rights>2019. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). 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The modelling of the settleability of the resultant Al3+ sludge in present engineering practice for design and optimisation are still based on conventional sludge settleability models. This paper describes a novel activated sludge settleability model which is designed to analyse the effects of Al3+ dosing on activated sludge settleability indicators, zone settling velocity (ZSV), and stirred specific volume index (SSVI). The impact of Al3+ dosing concentrations on ZSV and SSVI of full scale activated sludge plant were analysed in the laboratory over a three years’ period and the exponential form of the Vesilind equation was optimised and validated to include alum chemical dosing parameters. The proposed model equation was found to effectively describe the settleability of Al3+ dosed sludge for dosing concentrations range of 0 to 100 mg/L.</description><subject>Activated sludge</subject><subject>Alum</subject><subject>Aluminum</subject><subject>Chemical precipitation</subject><subject>Design optimization</subject><subject>Efficiency</subject><subject>Effluent quality</subject><subject>Effluents</subject><subject>Ethylenediaminetetraacetic acid</subject><subject>Eutrophication</subject><subject>Indicators</subject><subject>Nutrient removal</subject><subject>Organic chemistry</subject><subject>Phosphates</subject><subject>Phosphorus</subject><subject>Precipitation</subject><subject>Purification</subject><subject>Salts</subject><subject>Sedimentation & deposition</subject><subject>Settling velocity</subject><subject>Sewage</subject><subject>Sludge</subject><subject>Sludge settling</subject><subject>Specific volume</subject><subject>Velocity</subject><subject>Wastewater treatment</subject><subject>Wastewater treatment plants</subject><subject>Water pollution control</subject><subject>Water treatment</subject><subject>Water treatment plants</subject><issn>2073-4441</issn><issn>2073-4441</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdUbFOwzAQtRBIVKUDf2CJiSHFiW0Ss0VtgUoFhsIcOfa5cuXEJXZa9e8JKkKIe8Od7r13NzyErlMypVSQu0OakgG5OEOjjOQ0YYyl53_mSzQJYUuGYqIoOBmhsDAGVMTe4NL1jW1t3-C1dBHPfbDtBvsWlyravYyg8dr1egN4DTE6kLV1Nh7xstVWyei78IBL_AqHf_yL1-DwHPbg_K6BNl6hCyNdgMlPH6OPx8X77DlZvT0tZ-UqUZSmMeFEmtzoGrTiXFKqhZayVoynXHGak1wSJQylBZBaa2YEZXWR5QPDta4Zo2N0c7q76_xnDyFWW9937fCyyrJM3HMhCjKopifVRjqobGt87KQaoKGxyrdg7LAvc5FmBS3yYjDcngyq8yF0YKpdZxvZHauUVN85VL850C_UG3qT</recordid><startdate>20190101</startdate><enddate>20190101</enddate><creator>Ojo, Peter</creator><creator>Ifelebuegu, Augustine</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope></search><sort><creationdate>20190101</creationdate><title>Effect of Aluminium Salt Dosing on Activated Sludge Settleability Indicators: A New Settleability Model Development</title><author>Ojo, Peter ; Ifelebuegu, Augustine</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c331t-50af7fdbedc55a33d9daabc4515c53707a0c9f338e0bdd4f934b8273705ddb443</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Activated sludge</topic><topic>Alum</topic><topic>Aluminum</topic><topic>Chemical precipitation</topic><topic>Design optimization</topic><topic>Efficiency</topic><topic>Effluent quality</topic><topic>Effluents</topic><topic>Ethylenediaminetetraacetic acid</topic><topic>Eutrophication</topic><topic>Indicators</topic><topic>Nutrient removal</topic><topic>Organic chemistry</topic><topic>Phosphates</topic><topic>Phosphorus</topic><topic>Precipitation</topic><topic>Purification</topic><topic>Salts</topic><topic>Sedimentation & deposition</topic><topic>Settling velocity</topic><topic>Sewage</topic><topic>Sludge</topic><topic>Sludge settling</topic><topic>Specific volume</topic><topic>Velocity</topic><topic>Wastewater treatment</topic><topic>Wastewater treatment plants</topic><topic>Water pollution control</topic><topic>Water treatment</topic><topic>Water treatment plants</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ojo, Peter</creatorcontrib><creatorcontrib>Ifelebuegu, Augustine</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><jtitle>Water (Basel)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ojo, Peter</au><au>Ifelebuegu, Augustine</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Aluminium Salt Dosing on Activated Sludge Settleability Indicators: A New Settleability Model Development</atitle><jtitle>Water (Basel)</jtitle><date>2019-01-01</date><risdate>2019</risdate><volume>11</volume><issue>1</issue><spage>179</spage><pages>179-</pages><issn>2073-4441</issn><eissn>2073-4441</eissn><abstract>There has been a significant rise in the use of aluminium salts (Al3+) for the chemical precipitation of phosphates in wastewater treatment plants due to growing stricter regulatory requirements for wastewater effluent release to the environment. The modelling of the settleability of the resultant Al3+ sludge in present engineering practice for design and optimisation are still based on conventional sludge settleability models. This paper describes a novel activated sludge settleability model which is designed to analyse the effects of Al3+ dosing on activated sludge settleability indicators, zone settling velocity (ZSV), and stirred specific volume index (SSVI). The impact of Al3+ dosing concentrations on ZSV and SSVI of full scale activated sludge plant were analysed in the laboratory over a three years’ period and the exponential form of the Vesilind equation was optimised and validated to include alum chemical dosing parameters. The proposed model equation was found to effectively describe the settleability of Al3+ dosed sludge for dosing concentrations range of 0 to 100 mg/L.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/w11010179</doi><oa>free_for_read</oa></addata></record> |
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| source | MDPI - Multidisciplinary Digital Publishing Institute; EZB-FREE-00999 freely available EZB journals |
| subjects | Activated sludge Alum Aluminum Chemical precipitation Design optimization Efficiency Effluent quality Effluents Ethylenediaminetetraacetic acid Eutrophication Indicators Nutrient removal Organic chemistry Phosphates Phosphorus Precipitation Purification Salts Sedimentation & deposition Settling velocity Sewage Sludge Sludge settling Specific volume Velocity Wastewater treatment Wastewater treatment plants Water pollution control Water treatment Water treatment plants |
| title | Effect of Aluminium Salt Dosing on Activated Sludge Settleability Indicators: A New Settleability Model Development |
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