Palm oil mill effluent tends to concentrate major minerals and trace elements. For instance, in Nigeria, the decanted sludge analysed by Bamikole et al., 2009 contained about 80 mg/kg DM of Cu, and such a high level of copper could be toxic to sheep. Therefore, the use of this product in ruminant feed should be assessed carefully for potential mineral toxicity (Seephueak et al., 2011).
English