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- Title
ELECTROCHEMICAL DEODORIZATION AND DISINFECTION OF HOG MANURE.
- Authors
Bejan, Dorin; Rabson, Lisa M.; Bunce, Nigel J.
- Abstract
Electrolysis of liquid hog manure under direct current achieved amelioration of odour, in terms of both odour quality and odour intensity, and simultaneously reduced the population of odour-causing bacteria by two orders of magnitude. A comparison of anode materials indicated that hydroxyl radical-forming anodes (boron-doped diamond and Ebonex) were the most effective, but unfortunately these materials are not yet available commercially in large size format. Dimensionally stable anodes composed of Ti/IrO2 were found to be satisfactory; lead-based anodes leached unacceptable quantities of inorganic lead into the treated manure, and graphite anodes tended to disintegrate on long-term use. The mechanism of action of the bactericidal effect involves a combination of toxicity by O2 that is released at the anode and hypochlorination due to the chloride ion that is present in manure. The proposed technology was shown to be successful at the 27 L scale in an on-farm demonstration.
- Subjects
ELECTROLYSIS; MANURES; ODORS; BACTERIA; GRAPHITE; ANODES
- Publication
Canadian Journal of Chemical Engineering, 2007, Vol 85, Issue 6, p929
- ISSN
0008-4034
- Publication type
Article
- DOI
10.1002/cjce.5450850615