• Aminu Isiya Dabai Department of Civil Engineering, Bayero University Kano, Nigeria
  • Kasim Mohammed Department of Civil Engineering Technology, Federal Polytechnic, Kaura Namoda, Nigeria


Tanning process generates high strength wastewater containing heavy metals, nutrients, organic and inorganic contaminants, which may adversely affect public health and the environment. The wastewater contains considerable amounts of heavy metals including Cr(VI) which is carcinogenic, mutagenic and teratogenic, and persistent in the environment. Several physico-chemical treatment approaches were employed in tannery wastewater treatment and proved to considerably reduce the level of toxic Cr and other pollutants to low concentrations. Despite the capabilities of physico-chemical treatment methods in treating high concentrations of toxic effluents, they are associated with setbacks including low removal efficiencies, high cost of chemicals, high energy requirement as well as low nutrients removal from the wastewater stream. Microalgal wastewater treatment systems can play an important role in bioremediation of tannery effluent and are considered as low-cost, efficient treatment alternatives that can potentially remove organic and inorganic contaminants, heavy metals, and possibly reduce the toxic Cr (VI) to a much less toxic Cr (III), especially when coupled with activated carbon.
Keywords: microalgae, effluent, chromium, activated sludge, absorption, heavy metals


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How to Cite
DABAI, Aminu Isiya; MOHAMMED, Kasim. CHROMIUM REMOVAL FROM TANNERY WASTEWATER: A REVIEW. Platform : A Journal of Science and Technology, [S.l.], v. 3, n. 1, p. 63-73, july 2020. ISSN 2637-0530. Available at: <>. Date accessed: 11 aug. 2020.