Conference Paper

Enhanced biological phosphorus removal for liquid dairy manure

DOI: 10.13031/2013.24776 Conference: American Society of Agricultural and Biological Engineers (ASABE) Annual Meeting


The objective of this study was to evaluate the efficiency of P removal from separated liquid dairy manure by a research scale (16 L) EBPR system. EBPR was successful, as demonstrated by up to 98% reduction of the dissolved reactive phosphorus (DRP) when the manure was diluted 1:5 with tap water. When the dilution was reduced to 1:4, the DRP reduction efficiency dropped to 70%. Successful EBPR was demonstrated with dairy manure, but efficiency was affected by dilution. Additional work is needed to reduce the amount of fresh water addition required and to thicken the high P sludge.

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