South African Journal of Science
On-line version ISSN 1996-7489
Print version ISSN 0038-2353
ZHANG, Yi-Mei; SUN, Yao-Qun; WANG, Zhi-Jiang and ZHANG, Jie. Degradation of terephthalic acid by a newly isolated strain of Arthrobacter sp.0574. S. Afr. j. sci. [online]. 2013, vol.109, n.7-8, pp.01-04. ISSN 1996-7489.
Terephthalic acid is an important industrial chemical but its production typically generates 3-10 tons of wastewater, which is a significant source of pollution. Although recent research has shown that terephthalic acid can be degraded by physical and chemical methods, these methods are complex and expensive. Microbial degradation of terephthalic acid is a popular alternative because it is environmentally friendly. We isolated a Gram-positive strain capable of growing aerobically on terephthalic acid as the sole carbon and energy source. It was identified as Arthrobacter sp. by 16S rDNA sequencing and its physiological and biochemical characteristics. For terephthalic acid degradation, the optimal temperature of the resting cells was 30 °C, optimal shaking speed was 150 rpm, the most suitable pH was 7.0, and the ability to degrade terephthalic acid was inhibited by concentrations of terephthalic acid above 10 g/L.
Keywords : terephthalic acid; DNA; Arthrobacter sp.; resting cell; degradation.