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Anaerobic removal of COD in metal‐cutting‐fluid wastewater
ABSTRACT: The treatment of metal‐cutting‐fluid wastewater was investigated using an anaerobic, granular activated carbon, fluidized‐bed process. During 900 days of operation, three influent COD concentrations were tested: 1029, 3343, and 5324 mg/L. For each influent COD concentration, a series of influent flow rates was used to test a range of unexpanded empty‐bed contact times from 0.9 to 7.5 hours. The findings include the following: (1) the reactor removed biodegradable COD effectively and efficiently at relatively high loading rates (more than 70 kg/m3 · d); (2) approximately 35% of the influent COD was nonbiodegradable—more than approximately 65% of the nonbiodegradable COD was aerobically biodegradable; (3) approximately 68% of the COD biodegraded was converted to methane, showing potential for energy recovery; (4) a relatively low biomass production (a yield coefficient of approximately 0.09 g biomass produced/g COD degraded) was observed; and (5) the overall removal rate of biodegradable COD followed firstorder kinetics.
Anaerobic removal of COD in metal‐cutting‐fluid wastewater
ABSTRACT: The treatment of metal‐cutting‐fluid wastewater was investigated using an anaerobic, granular activated carbon, fluidized‐bed process. During 900 days of operation, three influent COD concentrations were tested: 1029, 3343, and 5324 mg/L. For each influent COD concentration, a series of influent flow rates was used to test a range of unexpanded empty‐bed contact times from 0.9 to 7.5 hours. The findings include the following: (1) the reactor removed biodegradable COD effectively and efficiently at relatively high loading rates (more than 70 kg/m3 · d); (2) approximately 35% of the influent COD was nonbiodegradable—more than approximately 65% of the nonbiodegradable COD was aerobically biodegradable; (3) approximately 68% of the COD biodegraded was converted to methane, showing potential for energy recovery; (4) a relatively low biomass production (a yield coefficient of approximately 0.09 g biomass produced/g COD degraded) was observed; and (5) the overall removal rate of biodegradable COD followed firstorder kinetics.
Anaerobic removal of COD in metal‐cutting‐fluid wastewater
Kim, Byung R. (Autor:in) / Zemla, Jerome F. (Autor:in) / Anderson, Stanley G. (Autor:in) / Stroup, David P. (Autor:in) / Rai, Devi N. (Autor:in)
Water Environment Research ; 64 ; 216-222
01.05.1992
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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