National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
This study assesses the effectiveness of the wastewater treatment plant at the Cocody-Angré University Hospital Centre (CHU) in treating hospital effluent, focusing on the removal of certain trace metal elements (TME): zinc (Zn), cadmium (Cd), lead (Pb) and arsenic (As). Three sampling campaigns collected six samples at the inlet and outlet of the plant. The analyses were carried out in accordance with AFNOR and ISO 5961 (1994) standards. The results were compared with Ivorian regulatory values and revealed a significant improvement in physico-chemical parameters after treatment: turbidity fell from 223 to 34 NTU (a reduction rate of 84.2%), and dissolved oxygen increased from 14.4% to 23.5%, indicating better aeration. The pH remained neutral and within the standards (6.93–7.31). With regard to heavy metals, the plant shows variable efficiency: half of the zinc and lead are removed (reduction rates of 56.3% and 66.4% respectively), while cadmium remains stable (0.05 µg/L) and arsenic increases slightly (0.05 to 0.19 µg/L). Thus, the plant performs well overall in terms of physical-chemical treatment, but has limitations for certain metals.
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