Journal of Environmental Engineering Technology ›› 2013, Vol. 3 ›› Issue (5): 386-390.doi: 10.3969/j.issn.1674-991X.2013.05.060

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

Comparative Study of Micro-aerobic and Anaerobic Hydrolysis Acidifications of Petrochemical Wastewater

WANG pei-chao1,2,WU Chang-yong2,ZHOU Yue-xi2,LIU Ming-guo2,3,LIU Heng-ming1,LIU Cheng4   

  1. 1. School of Marine Science and Technology and Environment, Dalian Ocean University
    2. Research Center of Water Pollution Control Technology, Chinese Research Academy of Environment Sciences
    3. School of Water Resource and Environment, China University of Geosciences
    4. Jilin Petrochemical Wastewater Treatment Plant, Petro China Jilin Petrochemical Company
  • Received:2013-04-19 Revised:2013-05-15 Online:2013-09-20 Published:2013-09-20
  • Contact: ZHOU Yue-xi

Abstract: Micro-aerobic and anaerobic hydrolysis acidifications of petrochemical wastewater were conducted and compared to investigate the influence of micro-aerobic condition on the high salt content and refractory industrial wastewater. The dissolved oxygen (DO) of micro-aerobic condition is about 0.5 mg/L, and the oxidation reduction potential (ORP) of anaerobic reactor is below -300 mV. The results showed that the average removal rate of CODCr with micro-aerobic hydrolysis acidification was 25.0%, while the average removal rate of CODCr with the anaerobic hydrolysis acidification was 23.5%. The rate of UV254/CODCr with micro-aerobic hydrolysis acidification was higher than that of anaerobic hydrolysis acidification, indicating a higher removal of aromatic and conjugated double bond organics in micro-aerobic condition than in anaerobic condition. The acid production and acidification rate was higher in anaerobic condition than in micro-aerobic condition because part of produced acid could be used by heterotrophic bacteria simultaneously during the hydrolysis acidification. The SO42- in anaerobic reactor reduced obviously, while it did not decrease in micro-aerobic reactor because the activity of sulfate reducing bacteria was restrained by oxygen. Therefore, the micro-aerobic condition can decrease the production and emission of H2S. Micro-aerobic hydrolysis acidification is more suitable for high salt content and refractory petrochemical wastewater treatment if DO can be controlled properly.

Key words: petrochemical wastewater, micro-aerobic, hydrolysis acidification, sulfate reduction

CLC Number: 

  • X703.1