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Article Information:
Assessment of Wastewater Discharge Impact from a Sewage Treatment Plant on Lagoon Water, Lagos, Nigeria
E.O. Longe and A.O. Ogundipe
Corresponding Author: Ezechiel Longe
Submitted: 2010 March, 22
Accepted: 2010 April, 16
Published: 2010 May, 10 |
Abstract:
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The aim of this study was to assess the wastewater discharge impact from the University of Lagos
campus treatment plant on the lagoon system . In order to achieve this objective water samples were collected
from nine sites and analyzed for different wastewater quality variables. The field survey was carried out
between July and November in order to capture both the wet and dry seasons. Average removal efficiencies
of measured parameters from treated effluents are 26% for Total Dissolved Solids (TDS), 73% for Biological
Oxygen Demand (BOD), 65.8% for Chemical Oxygen Demand (COD) and 72% for Total Nitrogen (Total N)
for the wet season campaign. During the dry season average rem oval efficiencies of measured parameters are
54% for TDS, 54% for BOD, 39% for COD and 42% for Total N. These values are lower than values obtained
for the wet season except for TDS. Most parameters in effluents exceeded the National Environmental
Protection Regulations, Effluent Limitation standards for discharge into river bodies. Average concentrations
of TDS, BOD and COD in lagoon water show higher concentrations than in the treated effluent and are above
the regulatory requirements. The research recommends further study on the possible influence of water
dynamics and sampling methods on water quality of the lagoon. The overall results from this research conclude
that the lagoon is being polluted by effluents discharge from the university treatment plant thereby exposing
the health of local residents who use it for recreation and for food production purposes.
Key words: Lagoon, parameters, pollution, sewage, treatment, water quality,
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Cite this Reference:
E.O. Longe and A.O. Ogundipe, . Assessment of Wastewater Discharge Impact from a Sewage Treatment Plant on Lagoon Water, Lagos, Nigeria. Research Journal of Applied Sciences, Engineering and Technology, (3): Page No: 274-282.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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