Cultivation and characters of aerobic granules for pentachlorophenol (PCP) degradation under microaerobic condition

Article type: Research Article

Authors: LAN, Hui-xia | CHEN, Yuan-cai^; | CHEN, Zhong-hao | CHEN, Rong

Affiliations: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China | Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510640, China

Note: [] Corresponding author. E-mail: [email protected]

Abstract: Cultivation of aerobic granular sludge for pentachlorophenol (PCP) degradation under microaerobic condition (DO concentration was controlled at 0.2–0.7 mg/L) was studied in this paper. Anaerobic granules were selected as inoculum. The changes of appearance were observed and the variations of SVI, VSS/TSS, PN/PS and the size of sludge were measured during cultivating. The capabilities for degradation of PCP, AOX and CODcr were also studied. Observations on mature granules were carried out by scanning electron microscope, and the results indicated bacillus was dominant on the surface of granules while in the inner of granules both bacillus and coccus were the dominant microorganisms. K, Na, Fe, Ca, Mg, Ni, Co, Mn, Cu and Zn were detected in the granules by element analysis.

Keywords: aerobic granular sludge, pentachlorophenol, microaerobic condition

Journal: Journal of Environmental Sciences, vol. 17, no. 3, pp. 506-510, 2005