Nogyo Shisetsu (Journal of the Society of Agricultural Structures, Japan)
Online ISSN : 2186-0122
Print ISSN : 0388-8517
ISSN-L : 0388-8517
Milking Parlour Wastewater Treatment by Magnetic Activated Sludge Process
Chun YINGKazutaka UMETSUYasuzo SAKAIIkko IHARATakaki YAMASHIRO
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2009 Volume 39 Issue 4 Pages 243-248

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Abstract

Treatment of dairy milking parlour wastewater using the Magnetic Activated Sludge (MAS) process was investigated. The experiment was carried out for 150 days without withdrawal of excess sludge and without addition of ferromagnetic powder. During the experimental period, three different CODcr loading rate; 527.7mg/l/d, 852.0mg/l/d and 1541.9mg/l/d for hydraulic retention times of 3 days, 2 days and 1 day were used, respectively. The average CODcr removal efficiency of 93% was maintained in the experimenteal period. High biomass concentration in aeration tank was achieved by magnetic separation.

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