BIOREMEDIATION OF TEXTILE INDUSTRIES EFFLUENTS USING SELECTED BACTERIAL SPECIES IN KANO, NIGERIA
BIOREMEDIATION OF TEXTILE INDUSTRIES EFFLUENTS USING SELECTED BACTERIAL SPECIES IN KANO, NIGERIA
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Date
2012-11
Authors
GALADIMA, Adamu Dagona
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Abstract
Release of untreated textile effluents, especially into water bodies makes the environment
unhealthy, and thereby affecting entire life of humans, plants and other aquatic animals. This
eventually affects the quality of water and limits its utilization. This study was carried out to
determine the bioremediation potentials of bacteria species isolated from textile effluents of
two industrial sites in Kano, Nigeria. Physicochemical characterization of textile effluents
collected from Sharada and Chalawa industrial estates was carried out. The results showed
high rates of contaminants and heavy metals. Temperature of discharge ranged from 35°C to
37°C and pH of the effluents was slightly above neutral level but within the permissible
limits and ranged from 7.15 to 7.2. Using morphological and biochemical characteristics,
fifteen (15) bacterial isolates were identified from the effluents sample and out of these, nine
(9) of the isolates were selected for further studies based on their ability to degrade textile
effluents and grow on minimum basal medium efficiently and rapidly. The biodegradation
and decolourisations ability of these isolates were carried for ten days and the results were
expressed in percentages with Bacillus subtilis having (99.60 %), Pseudomonas aeruginosa
(99.60 %), Pseudomonas flourescens (96.00%), Bacillus brevis (95.60 %,), Alcaligenes
faecalis (95.00%), Pseudomonas putida (92.00%) Bacillus licheniformis (91.60%),
Aeromonas hydrophila (90.20%) and Bacillus megaterium (89.00%) Three microbial
consortia were therefore developed and tested for their effectiveness in the bioremediation:
Consortia 1 comprised of Pseudomonas aeruginosa, P. putida,and Bacillus subtilis and was
able to degrade 99.70% of textile effluent within ten days, consortia 2 comprised of
Pseudomonas aeruginosa, P. putida, Bacillus subtilis and P. fluorescence degraded by 96%
and consortia 3 comprised of Pseudomonas aeruginosa, P. putida, Bacillus subtilis,
Pseudomonas fluorescence and Alcaligenes faecalis degraded by 92%. Reduction
efficiencies of different contaminants were evaluated and compared. Results indicated
effectiveness of the investigated species for removal of the target contaminants ranged from
48% to 71% while, removal of heavy metal ranged from 50% to 99% was established.
Analysis of variance of the results revealed that, there was statistically significant differences
(p ≤ 0.05) in pH and DO after bioremediation. while there was no statistical significant
difference in the reduction efficacy of BOD , COD, TSS, TDS, EC, however, adsorption of
heavy metals (Cr, Cd, Cu, Fe, Mn, Ni, Pb, and Zn) showed significant difference (p ≤ 0.05),
between individual organisms and the consortia after bioremediation . The selected bacterial
species represent a promising tool for application in bioremediation of textile industrial
effluents and the biodegradation potential observed would increase the applicability of these
microorganisms for treatment of textile effluents before disposal to appropriate channel.
Description
BEING A THESIS SUBMITTED TO SCHOOL OF POSTGRADUATE STUDIES, IN
PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE AWARD OF
MASTER OF SCIENCE IN MICROBIOLOGY
DEPARTMENT OF MICROBIOLOGY, FACULTY OF SCIENCE AHMADU BELLO
UNIVERSITY, ZARIA, NIGERIA
NOVEMBER, 2012
Keywords
BIOREMEDIATION,, TEXTILE,, INDUSTRIES,, EFFLUENTS,, USING,, SELECTED,, BACTERIAL,, SPECIES,, KANO,, NIGERIA