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Optimization of Primary Chemical Feed Rates and Application Points at an Existing Potable Water Treatment Plant.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Optimization of Primary Chemical Feed Rates and Application Points at an Existing Potable Water Treatment Plant./
Author:	Jordan, Brently Keith.
Description:	1 online resource (101 pages)
Notes:	Source: Masters Abstracts International, Volume: 84-12.
Contained By:	Masters Abstracts International84-12.
Subject:	Civil engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30593077click for full text (PQDT)
ISBN:	9798379714796

Optimization of Primary Chemical Feed Rates and Application Points at an Existing Potable Water Treatment Plant.
Jordan, Brently Keith.

Optimization of Primary Chemical Feed Rates and Application Points at an Existing Potable Water Treatment Plant. - 1 online resource (101 pages)

Source: Masters Abstracts International, Volume: 84-12.

Thesis (M.S.C.E.)--The University of Texas at Arlington, 2023.

Includes bibliographical references

Due to a major upset in the treatment processes for the Dallas County Park Cities Municipal Utility District caused by a required change in treatment techniques, an optimization study was conducted to find the best treatment strategies for the primary coagulation, flocculation, and settled processes for the treatment plant. A methodology for determining how to optimize jar testing while injecting both ferric sulfate and calcium hydroxide in an almost simultaneous manner was developed, and a large number of jar tests were conducted to determine both the best dosages and the best application points of the two chemicals.As a result of this study, it was determined that the primary contributor for optimal water quality in the primary treatment processes for the District's treatment plant was the application point of the chemicals used rather than the chemical dosages and/or velocity gradients used during primary treatment. At least for the District's treatment plant, feeding calcium hydroxide into the exit of the plant's rapid mixers, while feeding ferric sulfate into the plant's first stage flocculation basin provides the most optimal treatment of the water.Two alternate chemicals (a poly ferric sulfate blend for coagulation, and sodium hydroxide rather than calcium hydroxide for pH and alkalinity control) was also investigated. The poly ferric sulfate blend showed inconclusive results (per the manufacturer), and the sodium hydroxide results showed that it is not an acceptable alternative chemical for calcium hydroxide for the District's treatment plant.Jar testing for optimization is also not a one-time event. It must be periodically repeated due to changes in raw water quality parameters such as pH, temperature, alkalinity, organic content, and the type and magnitude of raw water turbidity This study also resulted in a set of recommendations for the treatment plant's continuing optimization, including weekly and/or as-needed jar testing for optimal chemical dosages, additional research into even more precise optimization procedures, weekly calibration checks of the plant's coagulant feed pumps, the potential for utilization of magnetic flow metering to monitor actual coagulate feed rates, and adjustments to the plant's clarifier baffling systems.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798379714796Subjects--Topical Terms:

860360
Civil engineering.
Subjects--Index Terms:

CoagulationIndex Terms--Genre/Form:

542853
Electronic books.

Optimization of Primary Chemical Feed Rates and Application Points at an Existing Potable Water Treatment Plant.
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500 $a Source: Masters Abstracts International, Volume: 84-12.
500 $a Advisor: Kruzic, Andrew.
502 $a Thesis (M.S.C.E.)--The University of Texas at Arlington, 2023.
504 $a Includes bibliographical references
520 $a Due to a major upset in the treatment processes for the Dallas County Park Cities Municipal Utility District caused by a required change in treatment techniques, an optimization study was conducted to find the best treatment strategies for the primary coagulation, flocculation, and settled processes for the treatment plant. A methodology for determining how to optimize jar testing while injecting both ferric sulfate and calcium hydroxide in an almost simultaneous manner was developed, and a large number of jar tests were conducted to determine both the best dosages and the best application points of the two chemicals.As a result of this study, it was determined that the primary contributor for optimal water quality in the primary treatment processes for the District's treatment plant was the application point of the chemicals used rather than the chemical dosages and/or velocity gradients used during primary treatment. At least for the District's treatment plant, feeding calcium hydroxide into the exit of the plant's rapid mixers, while feeding ferric sulfate into the plant's first stage flocculation basin provides the most optimal treatment of the water.Two alternate chemicals (a poly ferric sulfate blend for coagulation, and sodium hydroxide rather than calcium hydroxide for pH and alkalinity control) was also investigated. The poly ferric sulfate blend showed inconclusive results (per the manufacturer), and the sodium hydroxide results showed that it is not an acceptable alternative chemical for calcium hydroxide for the District's treatment plant.Jar testing for optimization is also not a one-time event. It must be periodically repeated due to changes in raw water quality parameters such as pH, temperature, alkalinity, organic content, and the type and magnitude of raw water turbidity This study also resulted in a set of recommendations for the treatment plant's continuing optimization, including weekly and/or as-needed jar testing for optimal chemical dosages, additional research into even more precise optimization procedures, weekly calibration checks of the plant's coagulant feed pumps, the potential for utilization of magnetic flow metering to monitor actual coagulate feed rates, and adjustments to the plant's clarifier baffling systems.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Civil engineering. $3 860360
650 4 $a Fluid mechanics. $3 528155
650 4 $a Environmental engineering. $3 548583
653 $a Coagulation
653 $a Flocculation
653 $a Settling
653 $a Jar tests
653 $a Water quality
653 $a Chemical dosages
655 7 $a Electronic books. $2 lcsh $3 542853
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690 $a 0775
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710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a The University of Texas at Arlington. $b Civil Engineering. $3 3351944
773 0 $t Masters Abstracts International $g 84-12.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30593077 $z click for full text (PQDT)