Electrochemical oxidation of leachate pretreated in an upflow anaerobic sludge blanket reactor
In: Environmental technology, Jg. 22 (2001), Heft 4, S. 373-381
academicJournal
- print, 23 ref
Zugriff:
This study was conducted to develop a two-stage process for the treatment of Hong Kong leachate. The leachate, containing 4750 mg/l of chemical oxygen demand (COD) and 1310 mg/l of ammoniacal nitrogen (NH3-N), was first treated in a UASB (upflow anaerobic sludge blanket) reactor at 37°C. The process removed on average 66.1% of COD with 6.1 days of hydraulic retention time (HRT), corresponding to an organic loading rate of 0.78 g-COD/(l.day). The UASB effluent, which had an average pH of 8.9, COD of 1610 mg/l and NH3-N of 1480 mg/l was then further treated by electrochemical oxidation in a batch reactor with recirculation. With the addition of 2000 mg/l of chloride (in the form of sodium chloride) and at a current density of 32.3 mA/cm2, 87% of COD and 100% of NH3-N were removed from the UASB effluent in six hours. The energy consumption was <55 kWh/kg-COD. The final effluent contained no residual NH3-N and only 209 mg/l of COD.
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Electrochemical oxidation of leachate pretreated in an upflow anaerobic sludge blanket reactor
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Autor/in / Beteiligte Person: | WANG, P ; LAU, I. W. C ; H. H. P., FANG |
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Zeitschrift: | Environmental technology, Jg. 22 (2001), Heft 4, S. 373-381 |
Veröffentlichung: | London: Selper, 2001 |
Medientyp: | academicJournal |
Umfang: | print, 23 ref |
ISSN: | 0959-3330 (print) |
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