DOI: 10.1016/j.watres.2018.06.032
Scopus记录号: 2-s2.0-85048823945
论文题名: Steel slag filter design criteria for phosphorus removal from wastewater in decentralized applications
作者: Claveau-Mallet D. ; Boutet É. ; Comeau Y.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 143 起始页码: 28
结束页码: 37
语种: 英语
英文关键词: Alkalinity
; P-Hydroslag
; PHREEQC
; Physicochemical modelling
; Reactive filter
英文摘要: The objective of this project was to develop a novel phosphorus removal system using steel slag filters applicable in decentralized applications and to propose design criteria about maintenance needs. Slag exhaustion functions were measured on 2–3 mm, 3–5 mm, 5–10 mm and 16–23 mm slag. Three steel slag columns with particle size of 2–3 mm, 3–5 mm and 5–10 mm were fed with the effluent of an aerated lagoon during 589 days. A barrel reactor test was fed during 365 days with the effluent of an attached growth aerated biological reactor. The o-PO4 concentration at the effluent of the 2–3 mm and 3–5 mm columns and barrel reactor test was between 0.04 and 0.3 mg P/L. Particulate phosphorus, however, was removed by about 50%. The P-Hydroslag model implemented in PHREEQC was successfully calibrated with data from the column test, and validated with data from the barrel reactor test. The calibrated model was used to simulate long-term operation of a slag barrel reactor with two parallel streams of five replaceable steel slag barrels, with total hydraulic retention time of voids of 15 h. The system longevity was strongly influenced by the influent alkalinity. The simulated longevity was 7 years with an influent alkalinity of 50 mg CaCO3/L and 2 years with an influent of 210 mg CaCO3/L. The alkalinity of the steel slag filter influent was influenced by the type of aquifer supplying drinking water, the presence of nitrification activity and by the CO2 concentration in the enriched air of the upstream biological process. Simulated scenarios with partial barrel replacement (e. g. barrels 1 and 2 out of 5 replaced at frequency of 0.5, 1, 1.5, 2, 2.5, 3, 3.5 or 4 years) increased the system longevity up to 14 years while slightly increasing the number of barrels needed. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112572
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil, Geological and Mining Engineering, Polytechnique Montreal, Montreal, Quebec H3C 3A7, Canada; Bionest, 55, 12e Rue, C.P. 10070, Shawinigan, Quebec G9T 5K7, Canada
Recommended Citation:
Claveau-Mallet D.,Boutet É.,Comeau Y.. Steel slag filter design criteria for phosphorus removal from wastewater in decentralized applications[J]. Water Research,2018-01-01,143