Integration of photocatalytic and biological processes for treatment of complex effluent: Recent developments, trends, and advances

Govindaraj Divyapriya, Lakshmi Pisharody, Ansaf V. Karim, Puthiya Veetil Nidheesh

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

The presence of persistent organic pollutants (POPs) in wastewater remains a major challenge in worldwide. Conventional biological treatments that are most versatile and economical are not efficient in the complete removal of these pollutants due to their biorecalcitrant nature. Simultaneously, the application of advanced oxidation processes such as photocatalysis that are highly efficient in removing POPs is also limited due to their economic unviability, lack of scalability, operational difficulties etc. In this regard, the integration of photocatalysis with biological processes can completely eliminate POPs from wastewater. Consequently, recent studies emphasize the combined photocatalytic and biological process for the treatment of complex wastewaters and their process modifications. In this chapter, a comprehensive review of the integrated photocatalysis and biological processes are discussed. Enhancement in the treatment efficiency on combining photocatalysis as a pre-, post-, and multistep treatment to various biological methods such as activated sludge and attached growth processes are elaborated. Further, the chapter also reviews the various aspects of combined treatments such as toxicity reduction, mineralization potential along with the detailing of a few pilot-scale studies.

Original languageEnglish
Title of host publicationIntegrated Environmental Technologies for Wastewater Treatment and Sustainable Development
PublisherElsevier
Pages1-22
Number of pages22
ISBN (Electronic)9780323911801
ISBN (Print)9780323984850
DOIs
StatePublished - 1 Jan 2022

Keywords

  • Biodegradability
  • Biological process
  • Complex effluents
  • Photocatalysis
  • Process integration

ASJC Scopus subject areas

  • Engineering (all)
  • Chemical Engineering (all)

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