Detail publikace

Wastewater from Biodiesel Production as a Carbon Source for Denitrification of Sludge Liquor in SBR

Originální název

Wastewater from Biodiesel Production as a Carbon Source for Denitrification of Sludge Liquor in SBR

Anglický název

Wastewater from Biodiesel Production as a Carbon Source for Denitrification of Sludge Liquor in SBR

Jazyk

en

Originální abstrakt

Sludge liquor from an anaerobic sludge digester with an average N-NH4 mass concentration of = 1185 mg.L-1 was treated in a pilot-scale SBR (sequencing batch reactor) system. The returned activated sludge of a WWTP was used as inoculum. The average efficiency of N-NH4 removal was over = 90%. Mass concentrations of N-NH4 in the effluent were typically below 10 mg.L-1. The maximal achieved nitrification rate was rN = 9.1 mg.g-1.h-1 (relative to MLVSS). Wastewater of methyl ester wash arising during biodiesel production was used as an external carbon source for denitrification. A dosage of 3.5 - 4.5 g of COD per 1 g of nitrogen available for denitrification was found optimal. Typical effluent N-NO3 mass concentration was about = 25 mg.L-1 and maximal achieved denitrification rate was rD = 14.5 mg.g.h-1. Operation of the SBR was stable at a HRT of = 4 - 5 days.

Anglický abstrakt

Sludge liquor from an anaerobic sludge digester with an average N-NH4 mass concentration of = 1185 mg.L-1 was treated in a pilot-scale SBR (sequencing batch reactor) system. The returned activated sludge of a WWTP was used as inoculum. The average efficiency of N-NH4 removal was over = 90%. Mass concentrations of N-NH4 in the effluent were typically below 10 mg.L-1. The maximal achieved nitrification rate was rN = 9.1 mg.g-1.h-1 (relative to MLVSS). Wastewater of methyl ester wash arising during biodiesel production was used as an external carbon source for denitrification. A dosage of 3.5 - 4.5 g of COD per 1 g of nitrogen available for denitrification was found optimal. Typical effluent N-NO3 mass concentration was about = 25 mg.L-1 and maximal achieved denitrification rate was rD = 14.5 mg.g.h-1. Operation of the SBR was stable at a HRT of = 4 - 5 days.

BibTex


@article{BUT50736,
  author="Jitka {Malá} and Josef {Malý}",
  title="Wastewater from Biodiesel Production as a Carbon Source for Denitrification of Sludge Liquor in SBR",
  annote="Sludge liquor from an anaerobic sludge digester with an average N-NH4 mass concentration of   = 1185 mg.L-1 was treated in a pilot-scale SBR (sequencing batch reactor) system. The returned activated sludge of a WWTP was used as inoculum. The average efficiency of N-NH4 removal was over  = 90%. Mass concentrations of N-NH4 in the effluent were typically below 10 mg.L-1. The maximal achieved nitrification rate was rN = 9.1 mg.g-1.h-1 (relative to MLVSS). Wastewater of methyl ester wash arising during biodiesel production was used as an external carbon source for denitrification.  A dosage of 3.5 - 4.5 g of COD per 1 g of nitrogen available for denitrification was found optimal. Typical effluent N-NO3 mass concentration was about   = 25 mg.L-1 and maximal achieved denitrification rate was rD = 14.5 mg.g.h-1. Operation of the SBR was stable at a HRT of   = 4 - 5 days.",
  address="Croatian Society of Chemical Engineers",
  chapter="50736",
  institution="Croatian Society of Chemical Engineers",
  journal="CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY",
  number="2",
  volume="24",
  year="2010",
  month="may",
  pages="211--217",
  publisher="Croatian Society of Chemical Engineers",
  type="journal article - other"
}