In the present study, bioremediation potentials of indigenous bacteria (Corynebacterium Kutsceri) in the treatment of tannery effluent was
investigated. Industrial tannery effluent samples from Mamuda Tannery
Industries in Challawa
Industrial estate, Kano State, Nigeria were collected
for a period of six months (August 2017
to January 2018) for the experiment. Bacteria were
isolated from the effluents using Serial Dilution, immobilized on agar-agar and biochemical tests were carried
out to identify the bacteria. Different masses (5g, 10g, 15g, 20g, and 25g) of the identified bacteria were used
in the treatment of 250 ml of
the effluents. Temperature, pH, BOD,
COD, SS, TDS, Sulphate (SO42-), Phosphate (PO43-), Nitrate (NO3-), Chloride (Cl-)
and some heavy metals (Cr, Fe, Mn, Ni, Pb, Zn,
Cd, and Cu) were determined before and
after treatment of the effluents with the bacteria. The pre-treatment analysis
showed that the values, 29.50±4.68, and 5.35±1.57 were observed for
temperature (OC) and the pH respectively. The levels (mg/l), 26.17±9.49; 3106±2753; 562±482; 444±507; 97.20±146.80; 268.34±411.01; 8.82±34.71 and 22.59±19.64were
observed for BOD, COD, SS, TDS, Nitrate, sulphates, Phosphate, Chlorides respectively. The concentration
(mg/l) of the heavy metals, before treatment (with the bacteria) were as; Cr (7.528±4.530); Fe (1.263±0.502); Ni
(0.023 ±
0.021); Mn (0.277
± 0.03); Pb (0.304 ±
0.20); Zn (0.058± 0.05); Cd (0.068±0.02) and Cu (0.012 ±0.02).
The bacteria were identified to be Corynebacterium Kutsceri. The post-treatment
analysis showed that the mean levels
(mg/l) of BOD ranged from (0.58b±0.45−0.81±0.67); COD (1376±248−2681±867);SS(78±89−273±375);TDS(25b±15−27±16);NO3−(14.43±8.88−26.52±13.06);SO42−(5.95±8.91−18.12±19.26);PO43−(1.76±2.64−2.10±3.00);Cl−(5.54±4.66−12.90±18.39);Cr(3.048±2.70−5.416±4.07);Fe(0.310±0.20−0.732±0.11);Ni(0.077±0.06−0.172±0.05);Mn(0.003±0.01−0.015±0.01);Pb(0.082±0.11−0.158 0.20);
Zn (0.028±0.03-0.048±0.04);
Cd (0.050±0.02−0.063±0.02)
and Cu (ND −0.007±0.00).
The post-treatment analysis using the different masses of
the Corynebacterium Kutsceri indicates that there is a great
decrease in the levels of the physicochemical parameters and the heavy metals
as well when compared with the levels observed at the pre-treatment analysis.
The decrease could be attributed to, not only due
to the increase in the exact mass of the bacteria but also to the
multiplicity in the mass of the Corynebacterium Kutsceri
which subsequently increases the surface area for the remediation. The average
high percentage reduction (70% to 100%) of these parameters and heavy metals
implies that the Corynebacterium Kutsceri has a higher potential for
the treatment of effluents from the
textile industries.
Primary Language | English |
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Subjects | Analytical Chemistry |
Journal Section | Articles |
Authors | |
Publication Date | June 23, 2020 |
Submission Date | November 7, 2019 |
Acceptance Date | March 30, 2020 |
Published in Issue | Year 2020 Volume: 7 Issue: 2 |