Removal of bitumen from mature oil sands tailings slurries by electro-flotation

被引：12
作者：
Alam, Raquibul [1 ]
Shang, Julie Q. [1 ]
机构：
[1] Western Univ, Dept Civil & Environm Engn, London, ON, Canada
来源：
JOURNAL OF WATER PROCESS ENGINEERING | 2017年 / 15卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Bitumen Electro-flotation; ANOVA Current density; Electrode; FACTORIAL DESIGN ANALYSIS; WATER-TREATMENT; WASTE-WATER; ELECTROFLOTATION; BIOSORPTION; EXTRACTION; EMULSIONS; INDUSTRY; SYSTEMS;
D O I：
10.1016/j.jwpe.2016.10.002
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The separation of bitumen from mature oil sand tailings slurries was carried out in an electro-flotation (EF) cell equipped with titanium coated with iridium oxide (Ti-Ir02) mesh as anode and stainless steel (SS 316) mesh as cathode. The effects of operating parameters such as pH, current density, bitumen concentration, and sodium chloride (NaC1) dosage on the performance of batch cell flotation were examined. The representative kinetics of the electro-flotation of bitumen in mature oil sand tailings slurries is best described as a first order reaction. Analysis of variance (ANOVA) is carried out to find out the statistical significance of influencing factors with respect to the first order flotation rate. The P -values in ANOVA show the order of significant factors as current density > bitumen concentration > pH. Though NaCl dosage doesn't have significant effect on flotation kinetics however it serves a significant role on reducing the power consumption of EF treatment. It is observed that at current density 150 A/m2, it is possible to reduce the bitumen concentration from 106.8 mg/L to less than 10 mg/L within 90 min of flotation to meet the Environmental Protection and Enhancement Act (EPEA) maximum discharge limit. 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：116 / 123
页数：8
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