Submerged membrane bioreactor in treatment of simulated restaurant wastewater

Bin Yang, Guanghao Chen, Guohua Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)

Abstract

Submerged membrane bioreactors (MBRs) were employed as a subsequent process following the electrocoagulation and electroflotation of restaurant wastewater, which is characterized as high content of oil, grease, suspended solid and detergent. The performance of two parallel MBRs was tested with simulated restaurant wastewater of respectively low and high initial concentrations of oil and detergent. The organic matter removal, sludge production and sludge properties, as well as membrane filtration performances were investigated. The overall COD removal efficiencies were 98.3% and 99.1%, respectively, when the initial influent contained 5 and 100 mg/L oil. The biological treatment was found to be the dominant contributor for COD removals in the MBRs. The presence of detergent showed a positive effect on fouling mitigation due to the modification of the membrane surface and the formation of relatively loose sludge cake.
Original languageEnglish
Pages (from-to)184-190
Number of pages7
JournalSeparation and Purification Technology
Volume88
DOIs
Publication statusPublished - 22 Mar 2012
Externally publishedYes

Keywords

  • Detergent
  • Filamentous bacteria
  • Membrane fouling
  • Membrane surface modification
  • Oil and grease
  • Sludge production

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

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