Environmental Impacts of Agbara Abattoir Waste on the Ecosystem of Ologe Lagoon, Nigeria

Aims: This research was conducted to investigate the effects of Agbara abattoir wastes dumped into the Ologe lagoon.

Place and Duration of Study: The study was conducted at Ologe lagoon in Lagos, Nigeria from September 2019 - December 2019.

Methodology: Water samples from the lagoon were collected monthly from three sites in the lagoon for four months. 30m before the entry site, the entry site of the abattoir wastes, and 30m after the entry site. After collection, the samples were analyzed for 13 parameters following the guidelines of the American Public Health Association (APHA).

Results: The result showed that the conductivity ranged between 80.94 to 139.93 (µS/cm). The pH ranged between 7.84 to 9.23. The total dissolved solids ranged between 44.00 to 110.24(mg/l). The total suspended solids ranged between 20.12 to 70.82 (mg/l). The ammonia ranged from 0.01 to 0.04 (mg/l). The biological oxygen demand ranged from 50.72 to 107.41 (mg/l). The chemical oxygen demand ranged from 202.94 to 497.17 (mg/l). The chromium ranged from 0.04 to 0.06 (mg/l). The coliform level ranged from 33.62 to 82.50 (cfu/100ml). The Escherichia coli ranged from 1.20 to 3.30 (cfu/ml). The nitrate ranged from 2.74 to 4.55 (mg/l). The nitrite ranged from 0.22 to 0.69 (mg/l). The phosphate ranged from 6.89 to 11.33 (mg/l).

Conclusion: This research showed that the ologe lagoon is polluted and unfit for human consumption and aquatic life. Therefore measures should be put in place to ensure proper disposal of the abattoir wastes in other to increase the quality of the lagoon.