Valores personales e interpersonales en los maestros 5

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The results of analyses that were carried out in this work also revealed that there was a significant difference (p<0.05) between the relative density of the oils and that of the biodiesels that were produced from the oils. In the same vein, there was a significant difference (p<0.05) between the pH of the oils and their respective biodiesels. There was also a significant difference (p<0.05) between the Kinematic viscosity of the oils and their respective biodiesels.

Conclusively, the biodiesels derived from the respective extracted oils are acceptable substitutes for petrodiesel based on the plausible results from the analyses that were carried out to assess certain physicochemical properties of the oils and biodiesels respectively. Although the analyses carried out were somewhat limited to the available resources, but the major physicochemical properties analyzed for in the oils make them an attractive alternative feedstocks for biodiesel production. However, same cannot be said for Spirogyra biomass due to its significantly low oil and biodiesel yield respectively.

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was not exhausted in this work. Hence, further oil and biodiesel characterization studies could be carried out to access the conformity of the substrate oils and their respective biodiesels to other guideline parameters by these regulatory bodies.

4. Biodiesels produced from the biomasses and/or their blends with petrodiesel could be subjected to comprehensive ignition testing operations to access their suitability for use in direct ignition diesel engines.

5. Engineering systems or automobile engines that would be locally adaptable and suitable for the efficient utilization of biodiesels produced from the substrate oils or their blends could be developed.

6. Life Cycle Assessment (LCA) studies of the biomasses could be carried out to establish the detailed agronomic and environmental requirements for maximal production output right from the farm to the industry, and up to the point of sale of the biodiesel products for either profit-making or other purposes.

7. There could be further studies to evaluate the oil and/or biodiesel potential of other locally available oil bearing biomasses in Nigeria asides from the ones explored in this work.

8. Considering the low yield of oil and biodiesel from spirogyra filaments, a microalga could be explored for its oil and/or biodiesel potentials rather than a macroalga (like the spirogyra that was used in this work).

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