The biodegradation of cable oil components: Impact of oil concentration, nutrient addition and bioaugmentation

• Published in: Environmental pollution (1987) Vol. 159; no. 12; pp. 3777 - 3783
• Main Authors: Towell, Marcie G., Paton, Graeme I., Semple, Kirk T.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.12.2011; Elsevier
• Subjects: agricultural soils; Alkanes - metabolism; Applied sciences; Bacteria - metabolism; bioaugmentation; Bioaugmentation and mineralisation; Biodegradation; Biodegradation of pollutants; Biodegradation, Environmental; Biological and medical sciences; Biotechnology; Cable oil; Cables; Carbon dioxide; Concentration (composition); Decontamination. Miscellaneous; Earth sciences; Earth, ocean, space; Engineering and environment geology. Geothermics; Environment and pollution; Environmental Restoration and Remediation - methods; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Industrial applications and implications. Economical aspects; Lubricants - metabolism; Microorganisms; mineralization; Nutrients; oils; Phenyldodecane; Pollution; Pollution, environment geology; Respiration; Soil (material); Soil and sediments pollution; Soil Microbiology; Soil Pollutants - metabolism; Biodegradation; Phenyldodecane; Nutrients; Cable oil; Bioaugmentation and mineralisation; Power cables; Hydrocarbon; Pollutant behavior; Biostimulation; Oil filled cable; Soil pollution; Bioaugmentation; Decontamination; Mineralization; Nutrient; Bioremediation; Organic compounds
• ISSN: 0269-7491; 1873-6424
• DOI: 10.1016/j.envpol.2011.06.043

The effect of cable oil concentration, nutrient amendment and bioaugmentation on cable oil component biodegradation in a pristine agricultural soil was investigated. Biodegradation potential was evaluated over 21 d by measuring cumulative CO 2 respiration on a Micro-Oxymax respirometer and 14C-phenyldodecane mineralisation using a 14C-respirometric assay. Cable oil concentration had a significant effect upon oil biodegradation. Microbial respiratory activity increased with increasing cable oil concentration, whereas 14C-phenydodecane mineralisation decreased. Bioaugmentation achieved the best cable oil biodegradation performance, resulting in increases in cumulative CO 2 respiration, and maximum rates and extents of 14C-phenyldodecane mineralisation. Generally, nutrient amendment also enhanced cable oil biodegradation, but not to the extent that degrader amendment did. Cable oil biodegradation was a function of (i) cable oil concentration and (ii) catabolic ability of microbial populations. Bioaugmentation may enhance cable oil biodegradation, and is dependent upon composition, cell number and application of catabolic inocula to soil. ► Cable oil concentration had a significant effect upon oil biodegradation. ► Microbial respiratory activity increased with increasing cable oil concentration. ► Bioaugmentation achieved the best cable oil biodegradation performance. ► Biodegradation was affected by cable oil concentration and microbial activity. Cable oil concentration and bioaugmentation strongly influence cable oil biodegradation in soils.