title: Biodegradation of 2,4,6-trinitrophenol (picric acid) in a biological aerated filter (BAF).
abstract: This study demonstrated the microbial purification of a model wastewater containing 2,4,6-trinitrophenol (TNP), which was carried out in a continuously working biological aerated filter (BAF). The main emphasis was on the operating performance of the reactor as a function of the pollution load. TNP was degraded at a maximum volumetric removal rate of 2.53gTNP/Ld, with low residual COD and TNP concentration. Overloading of TNP inhibited the nitrite-oxidizing activity, resulting in poor TNP degradation performance in the BAF system. The inhibition depended on some factors, such as influent concentrations and flow rates of the influent. It is assumed that nitrite-oxidizing occurred spontaneously during TNP degradation in the BAF system, could have significant influence on TNP wastewater treatment. One year after the reactor start-up, the dominance of Rhodococcus, which was initially inoculated in the reactor, was confirmed by analysis of 16S rDNA sequence of the PCR products separated by DGGE.
authors.affiliation: School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, Jiangsu Province, China.
authors.forename: Jinyou
authors.initials: J
authors.lastname: Shen
authors.forename: Rui
authors.initials: R
authors.lastname: He
authors.forename: Hongxia
authors.initials: H
authors.lastname: Yu
authors.forename: Lianjun
authors.initials: L
authors.lastname: Wang
authors.forename: Jianfa
authors.initials: J
authors.lastname: Zhang
authors.forename: Xiuyun
authors.initials: X
authors.lastname: Sun
authors.forename: Jiansheng
authors.initials: J
authors.lastname: Li
authors.forename: Weiqing
authors.initials: W
authors.lastname: Han
authors.forename: Lu
authors.initials: L
authors.lastname: Xu
mesh_terms: D000388:Air; D001483:Base Sequence; D002851:Chromatography, High Pressure Liquid; D017931:DNA Primers; D004275:DNA, Ribosomal / Q000235:genetics; D005374:Filtration / Q000295:instrumentation*; D010851:Picrates / Q000378:metabolism*; D016133:Polymerase Chain Reaction; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012240:Rhodococcus / Q000235:genetics / Q000378:metabolism
chemical_list: D017931:DNA Primers; D004275:DNA, Ribosomal; D010851:Picrates; D012336:RNA, Ribosomal, 16S; C005858:picric acid