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193388

REDUCTION OF TRIHALOMETHANE PRECURSORS USING ENHANCED COAGULATION

Article

Last updated: 03 Jan 2025

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Tags

Basic Sciences

Abstract

Jar tests were conducted to simulate the conventional processes of water treatment. Enhanced coagulation used the traditional alum that is already applied in water treatment in Egypt, with a comparison with ferric chloride and mixture of alum and ferric chloride, the strategy of enhanced treatment adopted mainly organic matter and THMs beside turbidity, so the doses of coagulant were increased to achieve better removal of THMs which have an health issue. Conventional treatment processes including addition of aluminum sulphate or ferric chloride to the raw water followed by coagulation, sedimentation and rapid sand filtration are important step in water purification. They reduced the organic matter to about 42% and THMs to 37 using the baseline dose (25 mg/l). The enhanced coagulation process by increasing the dose of alum reduced the total organic carbon and THMs to 57 % and 54 % respectively. Using of ferric chloride at a baseline dose reduced TOC and THMs by 40 % and 36% respectively, while enhanced coagulation by increasing the dose of ferric chloride (at a dose of 35 mg/l) raised up the removal of TOC and THMs to 47 % and 44% respectively. The dual coagulant of alum and ferric chloride achieved 47% removal of TOC and 36% for THMs at a dosage of 25 mg/l, while the enhanced coagulation by increasing the dose of duel coagulant of alum and ferric chloride (35 mg/l) raising up the removal of TOC to 61% and THMs to 50%. The advantageous of the dual coagulant is higher reduction of residual aluminum and THMs, this attributed to the enhancement of flocculation which create activated adsorption sites of flocs surfaces.  

DOI

10.21608/jes.2020.193388

Keywords

Key words: Water, Water treatment, Coagulation, TOC, THMs

Authors

First Name

Reham A.

Last Name

Abo Bakr

MiddleName

-

Affiliation

Egyptian Holding Company for Water and Wastewater

Email

-

City

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Orcid

-

First Name

Mostafa M.

Last Name

Khalil

MiddleName

-

Affiliation

Faculty of Science, Ain Shams University

Email

-

City

-

Orcid

-

First Name

Nabil A.

Last Name

Abdullah

MiddleName

-

Affiliation

Aluminum Sulfate Company of Egypt

Email

-

City

-

Orcid

-

Volume

49

Article Issue

8

Related Issue

27499

Issue Date

2020-08-01

Receive Date

2020-08-07

Publish Date

2020-08-01

Page Start

91

Page End

116

Print ISSN

1110-0826

Online ISSN

2636-3178

Link

https://jes.journals.ekb.eg/article_193388.html

Detail API

https://jes.journals.ekb.eg/service?article_code=193388

Order

5

Type

Review Article

Type Code

599

Publication Type

Journal

Publication Title

Journal of Environmental Science

Publication Link

https://jes.journals.ekb.eg/

MainTitle

REDUCTION OF TRIHALOMETHANE PRECURSORS USING ENHANCED COAGULATION

Details

Type

Article

Created At

22 Jan 2023