title: Biotreatment of o-nitrobenzaldehyde manufacturing wastewater and changes in activated sludge flocs in a sequencing batch reactor.
abstract: o-Nitrobenzaldehyde manufacturing wastewater is characterized for being highly saline, with its TN content and dissolved organic concentrations giving rise to high COD loads. A sequencing batch reactor was established to investigate the effects of major processing variables, such as SRT and HRT, on system performance. The optimal COD (86%) and TN (40.9%) removal efficiencies were obtained at 16d (SRT) and 12 h (HRT). Design equations were developed by applying experimental data. Changes in sludge flocs were studied using a combination of methods including: chemical analysis; fluorescence in situ hybridization (FISH); and denaturing gradient gel electrophoresis profile analysis of 16S rRNA genes. Dramatic changes occurred during adaptation and β-Proteobacteria was found to be the most prevalent population. Besides, some species affiliated with α-subclasses of Proteobacteria and Cytophaga-Flavobacterium-Bacteroides (CFB) group were also enriched. This study may help with future research in providing a better understanding of the activated sludge biotreatment.
authors: School of Environment and Resource Sciences, Zhejiang Agriculture and Forestry University, Linan 311300, PR China.
authors: Chang
authors: C
authors: Liu
authors: Shinawar Waseem
authors: SW
authors: Ali
authors: Li-Bo
authors: LB
authors: Guan
authors: Fang-Bo
authors: FB
authors: Yu
authors: Shun-Peng
authors: SP
authors: Li
authors: M H
authors: MH
authors: Wong
mesh_terms: D061249:Batch Cell Culture Techniques / Q000295:instrumentation*; D001547:Benzaldehydes / Q000302:isolation & purification / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D002617:Chemical Industry; D004867:Equipment Design; D019544:Equipment Failure Analysis; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism*; D018508:Water Purification / Q000295:instrumentation*
chemical_list: D001547:Benzaldehydes; D012722:Sewage; D014874:Water Pollutants, Chemical; C043850:2-nitrobenzaldehyde