Start-up regimes for anaerobic fluidised systems treating diary wastewater

  • da Motta-Marques D
  • Cayless S
  • Lester J
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Abstract

Four anaerobic fluidised-beds were started-up on a dairy-type effluent of 5000 mg COD litre-1using different regimes: (a) two-phase; (b) Ca2+addition; (c) polymer addition; and (d) control. Substrate removal efficiencies reached 76-92% at 9·4 kg COD-3day-1in the two-phase, calcium- and biopolymer-amended reactors. The data suggest that removal efficiency and biomass concentration peaks were variable but mature biofilms, which were dependent on the protocol applied, were developed in the above-mentioned three reactors. Volatile fatty acids concentrations were reflected by intermediary/partial alkalinity variations. © 1990.

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Authors

  • David M L da Motta-Marques

  • Sandra M. Cayless

  • John N. Lester

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