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Anaerobic digestion of pot-ale

Miscellaneous:

Abstract

In the production of whisky, the fermented wash is distilled twice and each bushel of grain yields about 15.5 gallons of pot-ale, 6.0 gallons of spent lees and 2.7 gallons of proof spirit. Disposal of pot-ale, the strong residue from the first distillation, containing all the non-volatile and unfermented components of the wash, will always be difficult. Anaerobic digestion provides a possible option. By destroying most of the biodegradable solids and converting them to biogas, it provides an intermediate effluent which conventional treatment technology can purify to river discharge standards. Pilot-scale trials confirm that pot-ale can be treated by anaerobic digestion. The most severe problems are the high purification efficiencies required to achieve UK river discharge standards and the quality and settling properties of the biological sludges produced. To achieved these standards, the design and operation of the entire treatment chain is dominated by the need to capture and concentrate suspended solids (SS) produced by the biological fermentations. Overall performance targets are 99.95% removal of biological oxygen demand (BOD), 99% removal of ammonia and a surplus sludge production of less than 20% of the incoming flow. (author).
Authors:
Publication Date:
Dec 01, 1990
Product Type:
Miscellaneous
Report Number:
GB-410
Reference Number:
SCA: 320305; PA: GB-91:052679; SN: 92000657909
Resource Relation:
Journal Issue: no. 1; Other Information: DN: General Information report produced under the Best Practice Programme for the Energy Technology Support Unit, Harwell (GB), based on a paper presented to the Whisky Industry seminar, Pitlochry.; PBD: Dec 1990; Related Information: General Report
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; RESIDUES; DISTILLATION; ANAEROBIC DIGESTION; BEVERAGE INDUSTRY; SLUDGES; PILOT PLANTS; 320305; INDUSTRIAL WASTE MANAGEMENT
OSTI ID:
10116576
Research Organizations:
Department of Energy, London (United Kingdom). Energy Efficiency Office
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Other: ON: DE92767006; TRN: GB9152679
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
GB
Size:
21 p.
Announcement Date:
Jun 30, 2005

Miscellaneous:

Citation Formats

Mosey, F E. Anaerobic digestion of pot-ale. United Kingdom: N. p., 1990. Web.
Mosey, F E. Anaerobic digestion of pot-ale. United Kingdom.
Mosey, F E. 1990. "Anaerobic digestion of pot-ale." United Kingdom.
@misc{etde_10116576,
title = {Anaerobic digestion of pot-ale}
author = {Mosey, F E}
abstractNote = {In the production of whisky, the fermented wash is distilled twice and each bushel of grain yields about 15.5 gallons of pot-ale, 6.0 gallons of spent lees and 2.7 gallons of proof spirit. Disposal of pot-ale, the strong residue from the first distillation, containing all the non-volatile and unfermented components of the wash, will always be difficult. Anaerobic digestion provides a possible option. By destroying most of the biodegradable solids and converting them to biogas, it provides an intermediate effluent which conventional treatment technology can purify to river discharge standards. Pilot-scale trials confirm that pot-ale can be treated by anaerobic digestion. The most severe problems are the high purification efficiencies required to achieve UK river discharge standards and the quality and settling properties of the biological sludges produced. To achieved these standards, the design and operation of the entire treatment chain is dominated by the need to capture and concentrate suspended solids (SS) produced by the biological fermentations. Overall performance targets are 99.95% removal of biological oxygen demand (BOD), 99% removal of ammonia and a surplus sludge production of less than 20% of the incoming flow. (author).}
issue = {no. 1}
place = {United Kingdom}
year = {1990}
month = {Dec}
}