Transformation of molecular weight distributions of dissolved organic carbon and UV-absorbing compounds at full-scale wastewater-treatment plants

Water Environment Research : a Research Publication of the Water Environment Federation
Mario Esparza-SotoPaul Westerhoff

Abstract

The molecular-weight distribution (MWD) of wastewater dissolved-organic carbon (DOC) was determined in samples from seven full-scale wastewater-treatment plants (WWTPs) that use different biological treatments (air activated sludge [air-AS], pure-oxygen AS [O2-AS], and trickling filters). The research objective was to determine how different biological treatments influenced the MWD of wastewater DOC. Primary sedimentation effluent DOC from most of the WWTPs exhibited a skewed distribution toward the low-molecular-weight fraction (MWF) (40 to 50%, < 0.5 K Daltons [KDa]). The Air-AS effluent DOC exhibited a centrally clustered distribution, with the majority of DOC in the intermediate MWF (0.5 to 3 KDa). The O2-AS effluent DOC exhibited a skewed distribution toward the high MWF (> 3 KDa). The removal of DOC by air- and O2-AS bacteria followed trends predicted by a macromolecule degradation model. Trickling-filter effluent DOC exhibited a skewed distribution toward the high MWF (50% DOC, > 3 KDa).

References

Nov 1, 1973·Biotechnology and Bioengineering·M W Tenney, F H Verhoff
May 3, 2003·Water Research·Mario Esparza-Soto, Paul Westerhoff
Nov 5, 1994·Biotechnology and Bioengineering·D R NogueraB E Rittmann
Jan 20, 1996·Biotechnology and Bioengineering·O Wanner, P Reichert

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Citations

Jan 19, 2018·Oncology Letters·Silke KuphalAnja Katrin Bosserhoff
Apr 1, 2014·International Journal of Environmental Research and Public Health·Bo Li, Guangxue Wu
Oct 5, 2010·Environmental Science & Technology·Guixue SongPaul Westerhoff

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