African Journal of

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12237

Full Length Research Paper

Response of microalgae from mud-flats to petroleum hydrocarbons in the presence of nitrogenous fertilizer effluents

A. Adoki
Health Safety and Environment, Shell Petroleum Development Co. Ltd, P.O. Box 263, Old Aba Road, Port Harcourt, Nigeria
Email: [email protected]

  •  Accepted: 06 February 2008
  •  Published: 04 March 2008


Untreated industrial waste (effluent) from out-fall of the National fertilizer company of Nigeria (NAFCON) was found to be weakly alkaline with a pH of 7.8. Total dissolved solids and sulphate were relatively high with levels of 2052 and 1599 mg/l, respectively. Nitrogen as ammonia was high in comparison to nitrate nitrogen. Phosphate was also found to be low in concentration. Using indigenous microalgae and aeration, there was a reduction in nutrients; NH4+, NO3-, PO43-and SO42-. However, in the presence of the hydrocarbon, there was delayed nutrient uptake. The consequence of this response was the observed reductions in chlorophyll content, biomass, etc. There was however a quick recovery in the oiled systems.


Key words: Industrial, effluent, petroleum, mudflat, microalgae, nitrogenous, fertilizer, response.