Denitrifying Characteristics of the Multiple Stages Enhanced Biological Nutrient Removal Process with External Carbon Sources

This research investigated denitrifying activity of activated sludge with three external carbon sources (sodium acetate, methanol and glucose) via a series of batch experiments. Activated sludge used was cultivated in a multiple stages enhanced biological nutrient removal (EBNR) process that exhibit...

Full description

Saved in:
Bibliographic Details
Published in:Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2003-03, Vol.38 (2), p.339-352
Main Authors: Chou, Yu-Jan, Ouyang, Chaio-Fuei, Kuo, Wei-Liang, Huang, Hau-Liang
Format: Article
Language:English
Subjects:
Activated sludge
Biodegradation, Environmental
Biological
Biomass
Breakthrough
Carbon
Carbon - chemistry
Denitrifying
Glucose
Glucose - metabolism
Methanol
Methyl alcohol
Nitrates
Nitrogen - isolation & purification
Nitrogen - metabolism
Nutrient removal
Nutrients
Phosphates
Phosphorus - isolation & purification
Phosphorus - metabolism
Sewage - chemistry
Sodium acetate
Waste Disposal, Fluid
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This research investigated denitrifying activity of activated sludge with three external carbon sources (sodium acetate, methanol and glucose) via a series of batch experiments. Activated sludge used was cultivated in a multiple stages enhanced biological nutrient removal (EBNR) process that exhibited high removal efficiency of effective carbon, nitrogen, and phosphorus. Results showed type of external carbon source had a significant influence on specific nitrate utilization rate, nitrite accumulation, adaptive time of microorganisms, and nitrate removal efficiency. Sodium acetate addition resulted in high phosphate concentration in effluent; meanwhile methanol caused increasing turbidity and carbon breakthrough problem. When glucose was fed to be the external carbon source, accumulative nitrite concentration was higher than that with sodium acetate or methanol addition. When sodium acetate, methanol and glucose were used to be the electron donor, average dosages for nitrate elimination were 6.97, 5.85, and 5.65 mg-COD/mg-N, respectively. Because the final polyhydroxyalkanoates (PHAs) concentrations contained within the biomass were more than the original level and no phosphate re-release was observed, glycogen-accumulating organisms (GAOs) might exist in the multiple stages EBNR process and increased carbon dosage for further nitrate removal.
ISSN:1093-4529
1532-4117
DOI:10.1081/ESE-120016898