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Bioaugmentation for improving the activated sludge process of treating refinery spent caustic: laboratory and field pilot-scale studies

Journal Article


Abstract


  • In this work, successful treatment of refinery spent-sulfidic caustic was achieved in activated sludge system bioaugmented with three specific bacterial strains (including Bacillus thuringiensis, Bacillus cereus, and Acidovorax ebreus) at both laboratory and pilot scale. After 18-fold dilution by volume, the diluted wastewater was treated aerobically. The volumetric loading rate of chemical oxygen demand (COD) was studied by treating variously diluted samples of high-strength wastewater (COD 3,100–3,600 mg/L). The results obtained with the raw wastewater were remarkably good, with an average COD removal of around 80%. The addition of peptone and trace elements improved the performance of the process. The mixed liquor suspended solids (MLSS) concentration in the reactors could be increased from the 2,500–3,000 mg/L MLSS level of general activated sludge processes to 6,000–8,000 mg/L after installation of draft tubes. These results showed that activated sludge process may be a powerful tool for treating refinery spent caustic by bioaugmentation and nutrient amendment.

Authors


  •   Sun, Shan Shan. (external author)
  •   Fang, Li (external author)
  •   Song, Zhaozheng (external author)
  •   Wang, Xiaojun (external author)
  •   Wang, Jingxiu (external author)
  •   Luo, Yijing (external author)
  •   Zhang, Zhiyong
  •   Zhang, Guangqing
  •   Jiang, Qingzhe (external author)
  •   Zhang, Zhongzhi (external author)

Publication Date


  • 2016

Citation


  • Sun, S., Fang, L., Song, Z., Wang, X., Wang, J., Luo, Y., Zhang, Z., Zhang, G., Jiang, Q. & Zhang, Z. (2016). Bioaugmentation for improving the activated sludge process of treating refinery spent caustic: laboratory and field pilot-scale studies. Desalination and Water Treatment, 57 (47), 22695-22702.

Scopus Eid


  • 2-s2.0-84954177575

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5128

Number Of Pages


  • 7

Start Page


  • 22695

End Page


  • 22702

Volume


  • 57

Issue


  • 47

Place Of Publication


  • United Kingdom

Abstract


  • In this work, successful treatment of refinery spent-sulfidic caustic was achieved in activated sludge system bioaugmented with three specific bacterial strains (including Bacillus thuringiensis, Bacillus cereus, and Acidovorax ebreus) at both laboratory and pilot scale. After 18-fold dilution by volume, the diluted wastewater was treated aerobically. The volumetric loading rate of chemical oxygen demand (COD) was studied by treating variously diluted samples of high-strength wastewater (COD 3,100–3,600 mg/L). The results obtained with the raw wastewater were remarkably good, with an average COD removal of around 80%. The addition of peptone and trace elements improved the performance of the process. The mixed liquor suspended solids (MLSS) concentration in the reactors could be increased from the 2,500–3,000 mg/L MLSS level of general activated sludge processes to 6,000–8,000 mg/L after installation of draft tubes. These results showed that activated sludge process may be a powerful tool for treating refinery spent caustic by bioaugmentation and nutrient amendment.

Authors


  •   Sun, Shan Shan. (external author)
  •   Fang, Li (external author)
  •   Song, Zhaozheng (external author)
  •   Wang, Xiaojun (external author)
  •   Wang, Jingxiu (external author)
  •   Luo, Yijing (external author)
  •   Zhang, Zhiyong
  •   Zhang, Guangqing
  •   Jiang, Qingzhe (external author)
  •   Zhang, Zhongzhi (external author)

Publication Date


  • 2016

Citation


  • Sun, S., Fang, L., Song, Z., Wang, X., Wang, J., Luo, Y., Zhang, Z., Zhang, G., Jiang, Q. & Zhang, Z. (2016). Bioaugmentation for improving the activated sludge process of treating refinery spent caustic: laboratory and field pilot-scale studies. Desalination and Water Treatment, 57 (47), 22695-22702.

Scopus Eid


  • 2-s2.0-84954177575

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5128

Number Of Pages


  • 7

Start Page


  • 22695

End Page


  • 22702

Volume


  • 57

Issue


  • 47

Place Of Publication


  • United Kingdom