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J Korean Soc Environ Eng > Volume 38(8); 2016 > Article
J Korean Soc Environ Eng 2016;38(8): 428-434. doi: https://doi.org/10.4491/KSEE.2016.38.8.428
티타늄계열응집제를 이용한 하수 내 인 제거
신소연1, 김종호2, 안종화1
1강원대학교 환경공학과
2전남대학교 응용화학공학부
Phosphorus Removal from Municipal Wastewater Using Ti-based Coagulants
So-Yeon Shin1, Jong-Ho Kim2, Johng-Hwa Ahn1
1Department of Environmental Engineering, Kangwon National University
2Department of Applied Chemical Engineering, Chonnam National University
Corresponding author  Johng-Hwa Ahn ,Tel: 033-250-6357, Fax: 033-254-6357, Email: johnghwa@kangwon.ac.kr
Received: June 10, 2016;  Revised: June 30, 2016;  Accepted: July 19, 2016.  Published online: August 31, 2016.
ABSTRACT
This study evaluated the efficacy of Ti-based coagulants on phosphorus (P) removal from municipal wastewater and compared them with Al-based coagulants. Jar test experiments were performed at various chemical doses and OH/Ti molar ratio (B value). The higher the intial phosphate (PO4-P) concentration, the lower the [Ti]/[P] to reach a residual concentration below 0.2 mg P/L. Removal efficiencies of total phosphorus increased with an increased coagulant dose but decreased after the efficiencies reached their maximum value regardless of coagulant or B value. On the other hand, PO4-P removal showed an increasing trend with an increased coagulant dose, reaching the plateau value under large coagulant dose conditions for both Ti- and Al-based coagulants regardless of B value. The chemical dose of Ti-based coagulants was approximately twice higher than that of Al-based coagulants with the same P-removal efficiency. The coagulation efficiency was influenced by different B values.
Key Words: Municipal Wastewater, OH/Ti Molar Ratio, Phosphorus, Poly Titanium Chloride, Ti-based Coagulant
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