TITLE:
Process for the Biological Removal of Fe (II) from Reconstituted Waters on a Support of Filter Material with Coated Jujube Seeds
AUTHORS:
Mamadou Faye, Falilou Mbacké Sambe, Alpha Ousmane Toure, Mouhamed Ndoye, Codou Guèye Mar Diop
KEYWORDS:
Biofilm, Batch Test, Biological Oxidation, Iron Removal, Beaker, Doped Water
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.10 No.12,
December
9,
2022
ABSTRACT: Three
beakers for removing Fe (II) in reconstituted water (doped with FeSO4)
were built and tested. Given the set operating conditions ([O2] >
4 mg·L-1, Patm = 1.013 bar, T = 25°C ± 1°C and
[Fe2+]0 = 0.5 to 2 mg·L-1), removal of iron
was caused by biological and possibly physical and chemical oxidation because
there is a quantity of free oxygen in the medium. The extent of each type of
oxidation has not been evaluated as it specifically studies the biological degradation of iron in these beaker tests by setting the
operating conditions (pH > 6.5, dissolved oxygen from 0 to 8 mg·L-1, Redox Potential
from 100 to 400 mV). The experimental studies focused particularly on the
measurements of maximum wavelength, conversion efficiencies from Fe (II) to Fe
(III), the effect of the Fe (II) concentration, the influence of pH, the action
of the temperature of the prepared solutions and the effect of O2 concentration under specified operating conditions. It noticed precipitated
amounts of iron deposited at the bottom of the beakers. Thus, the low
concentrations of Fe (II) detected in the influent after the biological
oxidation operation could be attributed to microorganisms that consume iron as
a substrate.