Changes in Microbial Population of Palm Oil Mill Effluent Polluted Soil Amended with Chicken Droppings and Cow Dung (original) (raw)
2014, British Biotechnology Journal
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The aim of this study was to demonstrate the use of chicken droppings and cow dung in the amendment of soil polluted with palm oil mill effluent (POME) in bioremediation. Soil polluted with 20 % raw (POME) in the laboratory was amended with different concentrations of chicken droppings, cow dung and a combination of the wastes (10 %, 20 % and 30 %). Isolation, characterization and identification of microorganisms were carried out and compared over time with respect to the different concentrations. Gas chromatography mass spectroscopy (GCMS) analysis of extracts of POME polluted and amended soil indicated a reduction in the number of long chain hydrocarbons (C 13 -C 44 ) in POME polluted soil to C 8 -C 21 in amended soil. This was attributed to the presence of microorganisms of the genera Pseudomonas, Bacillus, Proteus, Micrococcus, Aspergillus, Penicillium, Paecilomyces and Candida in significant numbers throughout the period of analysis. However, a combination of the two organic wastes at 20 % concentration was most effective in this reduction. The implication of these findings is that the bacteria, mould and yeast isolates found in these organic wastes can be useful in rehabilitation of POME polluted soil and possibly other oil polluted sites.
Industrialization is vital to a nation’s socio – economic development. It provides ready employment opportunities for a good percentage of the population. Although industrialization is inevitable, various devastating ecological and human disasters which have continuously occurred, implicate industries such as palm oil industry as major contributors to pollution problems and environmental degradation of various magnitude. As a result environmental problems have increased in geometric proportion over the last three decades with improper practices being largely responsible for the gross pollution of the aquatic environment with concomitant increase in waterborne diseases. Pollution of the environment with palm oil mill effluent (POME) is generated during palm oil processing which is carried out in mills where oil is extracted from the palm fruits. Large quantities of water are used during extraction of crude palm oil from the fresh fruits and about 50% of the water results in palm oil mill effluent.
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