Environmental Science and Pollution Research

, Volume 25, Issue 10, pp 9673–9682 | Cite as

Advanced treatment of petrochemical wastewater by combined ozonation and biological aerated filter

  • Pengyuan Ding
  • Libing Chu
  • Jianlong Wang
Research Article


The secondary effluent from a petrochemical wastewater treatment plant was treated by biological aerated filter (BAF) before and after ozonation, namely BAF1 and BAF2, respectively. The results showed that BAF2 fed with the ozonized secondary effluent exhibited a high efficiency in degrading organic pollutants. The removal efficiency of COD and NH4-N was 6.0 ± 3.2 and 48.2~18.6% for BAF1 and 12.5 ± 5.8 and 62.1~40.9% for BAF2, respectively, during the whole operation. The integration system of ozonation and BAF could tolerate a higher organic loading rate. When HRT decreased from 4 to 1 h, COD removal efficiency decreased from 12 to 4% for the BAF1 system, but it kept almost unchanged at high levels of 27–32% for the ozonation-BAF2 system, with around 20% removal by ozonation. The biomass in BAF2 exhibited a higher activity of protease, DHA, and SOUR than that in BAF1. The organic pollutants in influent and effluent of BAF were mainly ester compounds, which were difficult to biodegrade by BAF. The predominant genera in BAF1 were Gemmatimonadaceae uncultured, Thauera, and Thiobacillus, while the dominant genera in BAF2 were Nitrospira, Gemmatimonadaceae uncultured, and Flexibacter, respectively. Overall, BAF2 performed better than BAF1 in organic pollutant removal and microbial activity. The ozonation process was vital for BAF to treat petrochemical secondary effluent.


Biological aerated filter Petrochemical wastewater Microbial community Secondary effluent Ozonation 


Funding information

This research was supported by the National Natural Science Foundation of China (51338005), the National S&T Major Project (2012ZX07201-005-06-01), and the Program for Changjiang Scholars and Innovative Research Team in University (IRT-13026).

Supplementary material

11356_2018_1272_MOESM1_ESM.docx (142 kb)
ESM 1 (DOCX 141 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Laboratory of Environmental Technology, INETTsinghua UniversityBeijingPeople’s Republic of China
  2. 2.State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijingPeople’s Republic of China

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