Phosphate uptake and release rates with different carbon sources in biological nutrient removal using a SBR.
A three-step sequencing batch reactor (SBR) was used for nutrient removal from synthetic wastewater with different glucose-organic acid mixtures (1/1). Acetic, butyric, propionic and citric acids were used as organic acids along with glucose. The operation consisted of anaerobic, anoxic and oxic (An/Ax/Ox) phases with durations of 2/1/4.5h. Sludge age was kept constant for 10 days. Phosphate release and uptake rates were determined for different glucose-organic acid mixtures in the feed wastewater. Maximum phosphate uptake (8.1mgPl(-1)h(-1)) and release rates (2.23mgPl(-1)h(-1)) were obtained with the glucose-citric acid mixture. The highest (96%) percent phosphate removal at the end of the nutrient removal cycle (7.5h) was also obtained with the glucose-citric acid mixture while the glucose-acetic acid mixture resulted in comparable percent phosphate removal (95%).
Kargi
Fikret
F
Department of Environmental Engineering, Dokuz Eylul University, Buca, Izmir, Turkey. fikret.kargi@deu.edu.tr
Uygur
Ahmet
A
Başkaya
Hüseyin Savaş
HS
D019342:Acetic Acid / Q000378:metabolism; D019149:Bioreactors; D002244:Carbon / Q000378:metabolism*; D019343:Citric Acid / Q000378:metabolism; D005947:Glucose / Q000378:metabolism; D010710:Phosphates / Q000302:isolation & purification* / Q000378:metabolism; D012722:Sewage / Q000737:chemistry / Q000382:microbiology*; D014865:Waste Disposal, Fluid / Q000379:methods; D014873:Water Pollutants / Q000302:isolation & purification* / Q000378:metabolism; D018508:Water Purification / Q000379:methods
D010710:Phosphates; D012722:Sewage; D014873:Water Pollutants; D019343:Citric Acid; D002244:Carbon; D005947:Glucose; D019342:Acetic Acid