Biodegradation Potentials of Microorganisms Isolated from Eleme Petrochemical Industrial Effluent
Abstract
The biodegradation potentials of microorganisms isolated from different sampling points of Eleme petrochemical industrial effluent were analyzed. Eleme Petrochemical effluents take various forms which include; processed wastewater (raw effluent); clarified water (waste water undergoing treatment); retention pond gate (treated waste water) and receiving river. Biodegradation potentials of microorganisms isolated from the effluents were determined by shake flask degradation and screening test. The physicochemical analysis
revealed that effluents from Eleme Petrochemical Company Limited generally contained low concentrations of physicochemical pollutants except for total suspended solids (78.48 ± 0.01mg/l) and oil and grease (25.80 ± 0.02mg/l) contents which were higher than FEPA recommended limits. The isolated microorganisms identified to the genus level included Pseudomonas, Bacillus, Serratia, Micrococcus, Escherichia, Klebsiella, Vibrio, Proteus, Achromobacter, Citrobacter, Flavobacterium, Aspergillus, Penicillium, Fusarium, Monilia and Trichoderma. Pseudomonas had the highest frequency of occurrence (10.33%) among bacteria while Aspergillus had the highest frequency of occurrence (19.58%) among fungi. Microbiological enumeration revealed that process waste water had the highest counts for total heterotrophic bacterial (THBC) (9.0×10 3 cfu/ml) and total fungal counts (TFC) (5.0×10 3 cfu/ml) while retention pond gate contained the highest
counts for total hydrocarbon utilizing bacterial (THUB) (5.7×10 3 cfu/ml). Pseudomonas, Serratia, Bacillus, Aspergillus, Penicillium and Fusarium were the most dominant microorganisms capable of utilizing petrochemical industrial effluent. The consortium of microorganisms demonstrated the highest efficacy to utilize petrochemical industrial effluent. Biodegradation of petrochemical industrial effluents by these microorganisms was manifested in the reduction of physicochemical parameters such as BOD (consortium of
Pseudomonas and Bacillus sp, 96%) and COD (consortium of Aspergillus and Penicillium, 89%).
revealed that effluents from Eleme Petrochemical Company Limited generally contained low concentrations of physicochemical pollutants except for total suspended solids (78.48 ± 0.01mg/l) and oil and grease (25.80 ± 0.02mg/l) contents which were higher than FEPA recommended limits. The isolated microorganisms identified to the genus level included Pseudomonas, Bacillus, Serratia, Micrococcus, Escherichia, Klebsiella, Vibrio, Proteus, Achromobacter, Citrobacter, Flavobacterium, Aspergillus, Penicillium, Fusarium, Monilia and Trichoderma. Pseudomonas had the highest frequency of occurrence (10.33%) among bacteria while Aspergillus had the highest frequency of occurrence (19.58%) among fungi. Microbiological enumeration revealed that process waste water had the highest counts for total heterotrophic bacterial (THBC) (9.0×10 3 cfu/ml) and total fungal counts (TFC) (5.0×10 3 cfu/ml) while retention pond gate contained the highest
counts for total hydrocarbon utilizing bacterial (THUB) (5.7×10 3 cfu/ml). Pseudomonas, Serratia, Bacillus, Aspergillus, Penicillium and Fusarium were the most dominant microorganisms capable of utilizing petrochemical industrial effluent. The consortium of microorganisms demonstrated the highest efficacy to utilize petrochemical industrial effluent. Biodegradation of petrochemical industrial effluents by these microorganisms was manifested in the reduction of physicochemical parameters such as BOD (consortium of
Pseudomonas and Bacillus sp, 96%) and COD (consortium of Aspergillus and Penicillium, 89%).
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