Effects of dolomite addition on phosphorus removal by chemical coagulation of secondary treated effluent

Title
Effects of dolomite addition on phosphorus removal by chemical coagulation of secondary treated effluent
Authors
이병하박준홍차호영맹승규송경근
Keywords
Wastewater treatment; Coagulation; Phosphorus removal; Dolomite; Coagulation aid; 하수처리; 응집; 인 제거; 백운석; 응집보조제
Issue Date
2012-06
Publisher
상하수도학회지
Citation
VOL 26, NO 3, 443-451
Abstract
Wastewater treatment plants need to reduce phosphorus in order to meet increasingly stringent regulations on phosphorus. This study evaluated the feasibility of dolomite as a coagulation aid to enhance phosphorus removal from secondary treated wastewater by chemical coagulation. Standard jar tests were conducted to evaluate the effect of dolomite addition on a coagulation process for phosphorus removal and to determine the optimum doses of coagulants and dolomite. Coagulants used with dolomite yielded a significant improvement in phosphorus removal and reduced total phosphorus concentrations below 0.02 mg/L in wastewater effluent. Dolomite has played an important role in enhancing phosphate adsorption and increasing pH, as a coagulation aid. The maximum removal efficiency of phosphorus in this study was yielded at 25 mg/l of dolomite and 20 mg Al/L of PAC dose. However, considering economic aspects, the optimum doses of dolomite and PAC were 10 mg/L and 15mg Al/L, respectively. Consequently, dolomite, a coagulation aid, can be used in coagulation processes to enhance the removal of phosphorus.
URI
http://pubs.kist.re.kr/handle/201004/42717
ISSN
12257672
Appears in Collections:
KIST Publication > Article
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