Journal of Environmental Engineering Technology ›› 2016, Vol. 6 ›› Issue (5): 420-426.doi: 10.3969/j.issn.1674-991X.2016.05.062

• Water Pollution Control Technology • Previous Articles     Next Articles

Enhancement of Pharmaceutical Wastewater Treatment in CASS Reactor by High-efficiency Degrading Bacteria

ZHOU Zhufeng1,2,3,SONG Youtao1,LIAO Miao2,3,ZENG Ping2,3,ZHANG Junke2,3,FAN Yadong2,3,4   

  1. 1. Environmental Collage, Liaoning University
    2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences
    3. Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences
    4. School of Chemical & Environmental Engineering, China University of Mining and Technology(Beijing)
  • Received:2016-03-15 Revised:2016-03-30 Online:2016-09-20 Published:2016-09-20
  • Contact: ZENG Ping E-mail:zengping@craes.org.cn

Abstract:

The mixer of fosfomycin degrading bacteria was added into cyclic activated sludge system (CASS) reactor to treat the effluent from an anaerobic baffled reactor which was fed with pharmaceutical wastewater. The CODCr, NH4+-N and TP removal efficiencies were studied, and the comparison between CASS reactor with and without inoculation was carried out. The results showed that when the reactor C2 was inoculated with fosfomycin degrading bacteria, and with the average CODCr of 1 101.4 mg/L,average NH4+-N of 134.7 mg/L, average TP of 22.1 mg/L in the influent, the CODCr, NH4+-N and TP of effluent were 203.7, 12.6 and 3.2 mg/L, respectively. Accordingly, the average removal efficiency of CODCr, NH3-N and TP was 81.57%, 90.67% and 85.44%, respectively. Comparatively, the average removal efficiency of CODCr, NH3-N, TP of the reactor C1 that was not inoculated with fosfomycin degrading bacteria was 66.91%, 84.30% and 67.41%. Thus the reactor C2 inoculated with fosfomycin degrading bacteria showed better CODCr, NH3-N, TP removal efficiencies than reactor C1. The main fluorescent materials in the influent were identified as aromatic protein substances and soluble microbial products based on the three-dimensional fluorescence spectra analysis. They were removed obviously after inoculated with fosfomycin degrading bacteria. 

Key words: cyclic activated sludge system (CASS), pharmaceutical wastewater, fosfomycin degrading bacteria, bio-augmentation, three-dimensional fluorescence spectroscopy

CLC Number: 

  • X703