Impact of Pig Manure on the Chemical Characteristics and Microbial Population of Crude Oil- Polluted Soil in Awka, Nigeria

Onuorah Samuel Soludo Christian Odibo Frederick

Abstract


The impact of pig manure on the chemical characteristics and microbial population of crude-polluted soil in Awka, Nigeria was studied using standard techniques. The chemical characteristics and microbial population of the pristine soil and pig manure were determined after which the soil was polluted with known volume of crude oil and left to stand for one month. The chemical characteristics as well as the microbial population of the crude oil-polluted soil were also determined before amendment with 10%, 20%, 30% and 40% pig manure. The values of the chemical constituents and the microbial population of the crude oil-polluted soil were lower than those of the pristine soil and pig manure. There was an increase in the values of the chemical constituents and microbial population of the crude oil-polluted soil upon amendment with the pig manure. However, the chemical constituents decreased while the microbial population increased till the fourth week of the experiment after which it declined. The reduction in the values of the chemical constituents of the soil with the corresponding increase in microbial population indicated that the amendment with pig manure enhanced the growth of the microorganisms in the crude oil-polluted soil, hence it can be used to enhance the microbial clean up of oil-polluted environments.

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