| Home | E-Submission | Sitemap | Contact Us |  
Environmental Engineering Research 2006;11(1): 45-53. DOI: https://doi.org/10.4491/eer.2006.11.1.045
CONTROL OF DIATOM BY PREOXIDATION AND COAGULATION IN WATER TREATMENT
Jeong-mi Seo1, Dongsoo Kong1, Seoungkoo Ann2, and Hyunook Kim2
1National Institute of Environmental Research
2Department of Environmental Engineering, University of Seoul
Corresponding Author: Hyunook Kim ,Tel: +82-2-2210-5624, Fax: +82-2-2210-2245 , Email: h_kim@uos.ac.kr
Received: February 8, 2005;  Accepted: February 5, 2006.
Share :  
ABSTRACT
Conventional coagulation is still the main treatment process for algae removal in water treatment. The coagulation efficiency can be significantly improved by the preoxidation of algae-containing water. Jar test was conducted to determine the optimal condition for the removal of diatoms, especially Cyclotella sp. by preoxidation and the subsequent coagulation. The effects of various concentration of PAC (Polyaluminum chloride) on coagulation with and without preoxidation using chlorine or potassium permanganate at different pHs (7.7 and 9.0) were evaluated. At pH 7.7, preoxidation with 2ppm Ch followed by coagulation with 7.5 ppm PAC coagulant could reduce Cyclotella sp. concentration by 86%. At pH 9.0, preoxidation with 1 mg KMnCVL followed by coagulation with 12.5 ppm PAC coagulant reduced Cyclotella sp. concentration by 85%. Non-linear regression was applied to determine the optimal condition. At pH 7.7 and 9.0, R was over 0.9, respectively. The pH of algal blooming water is over 9.0. Algae (diatom; Cyclotella sp.) can be controlled in the following ways: preoxidation with 1 mg KMnC>4 /L followed by coagulation with 12.5 ppm PAC coagulant can remove 80% algae from water. If water pH is adjusted to 7.7, it was expected that less amount of coagulant (7.5 or 10 mg PAC /L) after preoxidation (Ch 2 ppm or KMnCh 0.33, 1 ppm) would be needed to achieve similar level of algae removal. The oxidation with 0.33ppm KMnftt followed by coagulation with 7.5 ppm PAC coagulant was preferable due to cost-effectiveness of treatment condition and color problem after treatment
Keywords: coagulation | preoxidation | jar-test | diatom | chlorine (Ch) | potassium permanganate (KMnOj)
TOOLS
PDF Links  PDF Links
Full text via DOI  Full text via DOI
Download Citation  Download Citation
  E-Mail
Share:      
METRICS
1
Crossref
0
Scopus
1,672
View
13
Download
TOXICITY EVALUATION USING HUMAN CELLS IN WATER TREATMENT PROCESSES  2003 October;8(4)
Editorial Office
464 Cheongpa-ro, #726, Jung-gu, Seoul 04510, Republic of Korea
TEL : +82-2-383-9697   FAX : +82-2-383-9654   E-mail : eer@kosenv.or.kr

Copyright© Korean Society of Environmental Engineers. All rights reserved.        Developed in M2community
About |  Browse Articles |  Current Issue |  For Authors and Reviewers