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

Mario Esparza-Soto, Peter Fox, Paul Westerhoff

Research output: Contribution to journalArticle

14 Citations (Scopus)

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 [O 2-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 O 2-AS effluent DOC exhibited a skewed distribution toward the high MWF (>3 KDa). The removal of DOC by air- and O 2-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).

Original languageEnglish (US)
Pages (from-to)253-262
Number of pages10
JournalWater Environment Research
Volume78
Issue number3
DOIs
StatePublished - Mar 2006

Fingerprint

Molecular weight distribution
Organic carbon
dissolved organic carbon
wastewater treatment
Wastewater treatment
molecular weight
biological treatment
effluents
wastewater
Effluents
Wastewater
Molecular weight
effluent
air
activated sludge
Air
Macromolecules
Sedimentation
wastewater treatment plant
distribution

Keywords

  • Air-activated sludge
  • Dissolved-organic carbon
  • Extracellular polymers
  • Molecular-weight distribution
  • Pure-oxygen-activated sludge
  • Soluble microbial products
  • Ultrafiltration membranes

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry
  • Aquatic Science
  • Water Science and Technology

Cite this

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title = "Transformation of molecular weight distributions of dissolved organic carbon and UV-absorbing compounds at full-scale wastewater-treatment plants",
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 [O 2-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 O 2-AS effluent DOC exhibited a skewed distribution toward the high MWF (>3 KDa). The removal of DOC by air- and O 2-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).",
keywords = "Air-activated sludge, Dissolved-organic carbon, Extracellular polymers, Molecular-weight distribution, Pure-oxygen-activated sludge, Soluble microbial products, Ultrafiltration membranes",
author = "Mario Esparza-Soto and Peter Fox and Paul Westerhoff",
year = "2006",
month = "3",
doi = "10.2175/106143005X90083",
language = "English (US)",
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AU - Fox, Peter

AU - Westerhoff, Paul

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N2 - 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 [O 2-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 O 2-AS effluent DOC exhibited a skewed distribution toward the high MWF (>3 KDa). The removal of DOC by air- and O 2-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).

AB - 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 [O 2-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 O 2-AS effluent DOC exhibited a skewed distribution toward the high MWF (>3 KDa). The removal of DOC by air- and O 2-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).

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KW - Ultrafiltration membranes

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