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Anaerobic removal of COD in metal-cutting-fluid wastewater

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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 ยท 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.
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Keywords: adsorption; anaerobic treatment; automotive waste; chemical oxygen demand; fluidized bed; industrial waste; metal cutting fluids

Document Type: Research Article

Publication date: 1992-05-01

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  • Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.

    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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