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J Korean Soc Environ Eng > Volume 41(6); 2019 > Article
J Korean Soc Environ Eng 2019;41(6): 321-327. doi: https://doi.org/10.4491/KSEE.2019.41.6.321
소독부산물 전구물질(NOM) 제거를 위한 응집공정의 최적화에 관한 연구
고길현1, 전영욱2, 김수현1, 강임석1
1부경대학교 환경공학과
2두산중공업(주)
Study of Optimum Coagulation Process for Remove Disinfect By-products Precursor
Gil hyun Go1, Young-wook Jeon2, Suhyun Kim1, Lim seok Kang1
1Department of Environmental Engineering, Pukyong National University
2Dusan Heavy Industries & Construction
Corresponding author  Lim seok Kang ,Tel: 051-629-6527, Fax: 051-629-6523, Email: kangls@pknu.ac.kr
Received: March 18, 2019;  Revised: May 3, 2019;  Accepted: May 6, 2019.  Published online: June 30, 2019.
ABSTRACT
As the problems of disinfect by-products (DBPs) around the world become an issue, much attention has been focused on developing more reliable and efficient water treatment processing technologies. The removal of NOM to reduce the formation of DBPs is increasingly important. Facilitating the removal of NOM is one of the key reasons for using coagulation. Therefore, the objective of this study was to investigate relationships between the properties of NOM precursors and DBPs formation, and find out the optimum coagulantion conditions for efficient removal of NOM to reduce the amount of DPBs formation. The optimum conditions for the alum and ferric chloride coagulation pH for removal of NOM was 5.5 with 0.15mM coagulant dose. When adjusting pH to 5.5 with 0.15 mM ferric chloride 55% DOC removal, 81.7% THMs reduction and 89.4% HAAs reduction was achieved. when using alum 46.3% DOC removal, 70.2% THMs reduction and 74.7% HAAs reduction was achieved. The results showed that lowering pH of raw water increased the removal of NOM during coagulation process and reduced DBPs formation. Also, ferric chloride was more effectively than alum for remove NOM and reduce DBPs formation.
Key Words: Coagulation process, NOM, Disinfect by-products, THMs, HAAs
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