Sequential biological and photocatalysis based treatments for shipboard slop purification: A pilot plant investigation

Vittorio Loddo, Michele Torregrossa, Marianna Bellardita, Santo Fabio Corsino, Gaspare Viviani, Francesco Parrino, Leonardo Palmisano, Michele Torregrossa, Gaspare Viviani, Bellardita, Francesco Parrino, Vittorio Loddo, Corsino, Palmisano

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1 Citation (Scopus)

Abstract

This study investigated the treatment of a shipboard slop containing commercial gasoline in a pilot plant scale consisting of a membrane biological reactor (MBR) and photocatalytic reactor (PCR) acting in series. The MBR contributed for approximately 70% to the overall slop purification. More precisely, the biological process was able to remove approximately 40%, on average, of the organic pollution in the slop. Nevertheless, the membrane was capable to retain a large amount of organic molecules within the system, amounting for a further 30% of the influent total organic content removal. However, this affected the membrane fouling, thus resulting in the increase of the pore blocking mechanism that accounted for approximately 20% to the total resistance to filtration (2.85∙10 13 m −1 ), even if a significant restoration of the original membrane permeability was obtained after chemical cleanings. On the other hand, the biological treatment produced a clear solution for the photocatalytic system, thereby optimizing the light penetration and generation of highly oxidizing active oxygen species that enabled the degradation of bio-recalcitrant compounds. Indeed, low total organic carbon (TOC) values (<10 mg L −1 ) were achieved in the output of the photocatalytic reactor by means of only 60 Einstein (E) of cumulative impinging energy after the addition of K 2 S 2 O 8 . Overall, coupling the two processes enabled very high TOC removal (ca. 95%).
Original languageEnglish
Pages (from-to)288-296
Number of pages9
JournalProcess Safety and Environmental Protection
Volume125
Publication statusPublished - 2019

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Safety, Risk, Reliability and Quality

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