Journal of Environmental Engineering Technology ›› 2012, Vol. 2 ›› Issue (6): 468-472.doi: 10.3969/j.issn.1674-991X.2012.06.073

• Water Pollution Control Technology and Resource Utilization • Previous Articles     Next Articles

Properties of Soluble Organic Materials in Effluent of a Petrochemical Wastewater Treatment Plant based on Molecular Weight Distribution

XU Min1,2,WU Chang-yong2,ZHOU Yue-xi2,ZHANG Sheng1,GAO Zhen1,2,SUN Qing-liang2,3   

  1. 1. Institute of Urban Construction, Hebei University of Engineering
    2. Research Center of Water Pollution Control Technology, Chinese Research Academy of Environment Sciences
    3. College of Chemical Engineering, Beijing University of Chemical Technology
  • Received:2012-04-11 Revised:2012-05-05 Online:2012-11-20 Published:2012-11-20
  • Contact: ZHOU Yue-xi E-mail:zhouyuexi@263.net

Abstract: The biological effluent in a petrochemical wastewater treatment plant (WWTP) was classified by ultrafiltration membrane separation. The material characteristics, composition and amounts of dissolved organic fractions in different molecular weight ranges were investigated by measuring TOC, UV254 and three-dimensional fluorescence spectrum. The results showed that organics on the fraction of molecular weight less than 1 kDa had the largest ratio in total organics of the biological effluent in the wastewater treatment plant, and the DOC of this fraction was about 92.7% of the total DOC. The aromatic structure was rich in 5 kDa and 10 kDa molecular weight components. Three-dimensional fluorescence spectrum analysis showed that dissolved organics on the fraction of molecular weight higher than 1 kDa mainly contained protein and humus materials, among which aromatic tryptophan was the dominant protein.

Key words: petrochemical wastewater, molecular weight distribution, dissolved organic matters, ultrafiltration membrane separation

CLC Number: 

  • X703.1