Interest has grown in promoting carbon sequestration in soils to help mitigate increasing carbon dioxide levels in the atmosphere. The potential for C sequestration in croplands in the European Union (EU) ranges between 90 million tons/year and 120 million tons/year, in the case that all known best land management practices were implemented. Olive mill pomance is the main by-product after the two-phase extraction procedure to produce olive oil. Recently, disposal of olive mill pomace was an environmental problem due to its relatively high polyphenol content and biological oxygen demand, together with some degree of phytotoxicity. The regional authorities (Secretariat General of Rural Affairs and Organic Production of the Regional Ministry of Agriculture and Fisheries) recognize the need for a source of organic matter to promote organic olive oil groves, the huge amount of olive mill pomace produced annually in Andalusia, and the EU's promotion in recent years to reuse olive mill pomace after composting.
Composting Olive Mill Pomace: The Andalusian Experience J M Álvarez de la Puente; J Jáuregui Arana; R Garcia-Ruiz BioCycle; Jun 2010; 51, 6; Docstoc pg. 31 Reproduced with perm
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