posted on 2018-04-17, 11:19authored byChristopher J. Fell
Increasing charges by the private utilities for the treatment of industrial waste water
are making on-site effluent treatment more attractive. On-site anaerobic digestion is
increasingly being used by food processing factories as a cost effective solution to
waste liquid waste disposal. Discharge of treated effluent to sewer or water course
requires compliance to a maximum admissible concentration (MAC) value, therefore,
there is a need for careful control of on-site waste water treatment. This research
investigates the treatment of effluent from instant coffee production. This results in a
liquid waste that contains recalcitrant and toxic compounds formed during the
roasting process. This waste varies in strength and composition according to the
different processes that are performed in the manufacture of instant coffee. Anaerobic
filters are particularly attractive for wastes containing recalcitrant or inhibitory
compounds requiring a long sludge age. Therefore, this study was aimed at firstly
investigating the treatability of coffee waste, using anaerobic filters; and secondly
monitoring and control of the digestion process in order to maintain a constant
effluent quality. [Continues.]
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Publication date
1999
Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.