Enhanced degradation of 1-naphthol in landfill leachate using Arthrobacter sp.

ABSTRACT

Arthrobacter sp. named as JY5-1 isolated from contaminated soil of a coking plant can degrade 1-naphthol as the sole carbon source. Through identification of species, analysis of the optimal degradation condition and kinetic equation, the degradation characteristic of Arthrobacter sp. JY5-1 was obtained. Later, the acclimated strain was added into the bio-reactor to observe treatment performance of landfill leachate. The results showed that the optimal conditions for strain JY5-1 biodegradation in the study were pH 7.0 and 30^oC. The bio-reactor operation experiment declared that Arthrobacter sp. JY5-1 had a strengthened effect on COD removal of landfill leachate. Moreover, the efficiency of COD removal could be high and stable when JY5-1 was accumulated as a biofilm together with active sludge. These results demonstrate that adding 1-naphthol-degrading strain JY5-1 is a feasible technique for the enhanced treatment of sanitary landfill leachate, providing theoretical support for engineering utilization.

KEYWORDS:

• Sanitary landfill leachate
• 1-naphthol-degrading strain
• bio-reactor operation

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The study was financially supported by the National Natural Science Foundation of China [grant numbers 51709103, 51579096, 51222805], the scientific Research Fund of Hunan Provincial Education Department [grant number 13C1082], Hunan Key Scientific Research Project [grant numbers 2015WK3016 and 2016WK2010].