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Inorganic solids development in a pilot-scale anaerobic reactor treating municipal solid waste landfill leachate

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A 30-L hybrid upflow anaerobic sludge bed filter (U ASBF) reactor was operated for 9 months on-site at a municipal solid waste landfill in western Massachusetts. Total chemical oxygen demand (COD) removals exceeded 85% at organic loading rates as great as 10 kg/m3┬Ěd. However, periodic monitoring of sludge profiles in the unpacked region indicated that the granular sludge bed was becoming compacted and mineralized. After 9 months of operation, total solids concentrations were approximately 450 g/kg, with approximately 80% of the total solids being fixed. Excessive inorganic scale accumulation on the interior reactor surfaces resulted in operational problems, and forced the eventual shutdown of the reactor. Evidence of reduced sludge activity resulting from the presence of metal precipitates indicates that pretreatment for metals removal is necessary prior to anaerobic treatment.
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Keywords: anaerobic digestion; anaerobic filter; landfill; leachate

Document Type: Research Article

Publication date: 1993-03-01

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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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