In vitro fermentation of olive oil mill wastewaters using sheep rumen liquor as inoculum: Olive mill wastewaters an alternative for ruminant's nutrition
Journal Title: Journal of BioScience and Biotechnology - Year 2014, Vol 3, Issue 3
Abstract
Olive oil mill wastewaters (OMWW) are the main liquid effluents generated by the olive oil production industry. This liquid, considered pollutant and toxic, is characterised by its high content of organic matter including mainly sugars and fats, and phenols compounds, which can be used in ruminants feeding. The purpose of this study is to valorise this agricultural by-product in ruminant feeding by estimation its in vitro degradability in presence of ovine ruminale microbiota comparatively to vetch-oat hay, using in vitro gas production technique coupled with NH3-N and protozoa measurements. Cumulative gas production was recorded at 3, 6, 9, 24, 48, 72 and 96 hours of incubation. The determination of gazes produced (carbon dioxide and methane) was recorded at 6, 9, 24, 48 and 96 hours. However, Ammonia and protozoa number were recorded after 24 hours of incubation. Fermentation profile was fitted to the exponential model y = a + b (1 – e-kt). The OMWW are characterized by their high sugars content (39.91%) and their low content in ash (1.99%) and crude protein (2.70%). This by-product is also characterized by its high concentration in total phenols (7.2%) and tannins (4.5%). However, they contain a very small amount of condensed tannins (0.89%). Comparatively to vetch-oat hay, OMWW produced low amount of gas (-23.6 units). Furthermore, its in vitro fermentation generates low volume of methane (9.83%, V/V), suggesting that the OMWW nature enhanced the efficiency of ruminale microbiota towards microbial biomass production and inhibition of ruminale methanogenesis pathway. This result is reinforced by the reduction of ammonia production (-0.35 units) and protozoa proliferation (-1 unit) comparatively to vetch-oat hay. The anaerobic biodegradation of OMWW reveal their significant use by the rumen microbiota, allowing us to strongly recommend its use as a supplement in feed ruminant. In addition, it allows considering using this residue as a feed additive in diets of ruminants for the reduction of ruminal methanogenesis.
Authors and Affiliations
Moufida Aggoun, Rabah Arhab, Nassima Leulm, Malika Barkat
Keywords
Related Articles
- EP ID EP89146
- DOI -
- Views 127
- Downloads 0
The phytoplankton of Koprinka Reservoir (Central Bulgaria): species composition and dynamics
The aim of the study was to determine the species composition and dynamics of the phytoplankton community of Koprinka reservoir. We have identified a total of 109 taxa assigned to 6 divisions including Chlorophyta (37),...
Assessment of the urban trees health status on the base of nutrient and pigment content in their leaves
Town settlements have different load level by emissions originated mostly from transport, industry and heating system. Their environmental and climate conditions are more or less changed that effect to growth, phys...
Chloroplast genome assembly approaches from NGS data
The advent of Next Generation Sequencing platforms has led to significant research innovation in the field of whole genome assembly algorithms and software. The Illumina platforms produce large amounts of distinctive seq...
Polymers as immunological adjuvants: An update on recent developments
Polymers are used in several immunological applications, for example in designing new generation vaccines, implantation studies, therapeutics and for the development of animal models that are mimicking human pathological...
Interaction of Some Antisickling Agents with Human Erythrocytes Calcium Pump
Sickle cell disease is a red blood cells disorder, which affects millions of people in the world. One of its clinical manifestations is cation fluxes. Although the antisickling potentials of hydroxyurea (HU), Cajanus caj...