A further study of the anaerobic biotreatment of malt whisky distillery pot ale using an UASB system

J. A S Goodwin, J. M. Finlayson, E. W. Low

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Pot ale from a pilot-scale malt whisky distillery was treated using a mesophilic upflow anaerobic sludge blanket (UASB) digester. Stable operation was observed at organic loading rates (OLRs) of 5.46 kg COD/m3 day or less when the pot ale was diluted with tap water. Digester failure occurred when undiluted pot ale was used, even though OLR was less than 5 kg COD/m3 day. Overall performance was worse than that observed previously when UASB digesters were used to treat pot ale from a different source supplemented with trace elements. A substantial proportion of effluent chemical oxygen demand (COD) was present as volatile fatty acids (VFA), particularly during periods of reactor stress, indicating that overall performance was limited by the rate of VFA conversion. Wastewater alkalinity rose during digestion. The sludge which developed in the reactor was flocculent but did not form compact granules. Copyright © 2001 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)155-160
Number of pages6
JournalBioresource Technology
Volume78
Issue number2
DOIs
Publication statusPublished - 2001

Keywords

  • Alkalinity
  • Anaerobic digestion
  • Malt whisky
  • Pot ale
  • UASB reactor

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