Pilot-scale treatment of waste-water from carbon production by a combined physical-chemical process

被引:5
|
作者
Wang, Hongjie [1 ,2 ]
Liu, Ruiping [1 ]
Qu, Jiuhui [1 ]
Fan, Maohong [3 ,4 ,5 ]
Li, Huaizheng [6 ]
机构
[1] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
[3] Univ Wyoming, Sch Energy Resources, Laramie, WY 82071 USA
[4] Univ Wyoming, Dept Chem & Petr Engn, Laramie, WY 82071 USA
[5] Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA
[6] Shanghai Acad Environm Sci, Shanghai 200233, Peoples R China
关键词
waste-water; carbon production (WCP); aluminium smelting; lime precipitation; coagulation; Fenton oxidation; decolouration; fluoride removal; ADVANCED OXIDATION PROCESSES; PHOTO-FENTON PROCESSES; FLUORIDE IONS; FLUE-GAS; REMOVAL; WASTEWATERS; EFFLUENT; SLUDGE; BED;
D O I
10.1002/jctb.2119
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
BACKGROUND: Due to its strong colour, high concentrations of fluorides and chemical oxygen demand (CODCr) and large amount of suspended solids (SS), the waste-water from carbon production (WCP) seriously affects the stability of the circulating system of Guizhou Branch, Aluminium Corporation of China. In this paper, the performance of a pilot-scale (24 m(3) d(-1)) combined treatment plant, consisting of chemical precipitation, coagulation, and Fenton oxidation, for the treatment of WCP was investigated. RESULTS: Lime precipitation and hydrated ferrous sulphate (HFS) coagulation, with polyacrylamide (PAM) as a coagulation aid, proved to be effective in the removal of colour (>70%), suspended solids (SS) (>90%) and fluoride (>80%) from the WCP. Subsequent Fenton oxidation combined with coagulation as a final treatment efficiently removed SS, F-, CODCr, dissolved organic carbon (DOC) and colour. The average total removal efficiencies of these parameters in the pilot-scale combined technology were as follows: SS = 98.8%, F- = 95.7%, CODCr = 94.8%, DOC = 91.8% and colour = 98.3%, giving an average effluent quality: colour 24 (multiple), CODCr 168 mg L-1, DOC 80 mg L-1, F- 38 mg L-1 and SS 44 mg L-1, consistent with the reusable water limits for the process. CONCLUSIONS: The current experimental results and the economic evaluation suggest that the combined process could be advantageous and feasible for the treatment of WCP. (C) 2009 Society of Chemical Industry
引用
收藏
页码:966 / 971
页数:6
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