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Electrochemical Deodorization and Disinfection of Hog Manure
Author(s) -
Bejan Dorin,
Rabson Lisa M.,
Bunce Nigel J.
Publication year - 2007
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450850615
Subject(s) - electrochemistry , manure , environmental science , waste management , pulp and paper industry , chemistry , engineering , biology , electrode , agronomy
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/IrO 2 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 O 2 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.