Study on the cultivation of aerobic gtanular sludge in SBR reactor

Author

Sheng, Gao ; Yuling, Liu ; Kai, Bai

Author_Institution

Key Lab. of Northwest Water Resources & Environ. Ecology of Minist. of Educ., Xi´´an Univ. of Technol., Xi´´an, China

fYear

2011

fDate

22-24 April 2011

Firstpage

6898

Lastpage

6902

Abstract

The experimental study of aerobic granular sludge in a sequencing batch reactor (SBR) was performed using synthetic domestic wastewater and ordinary flocculent activated sludge as seeding sludge. The conditions under which the successful cultivation of aerobic granular sludge was done are as follows: the temperature is room temperature, pH is about 7.0, aeration time is 150 ~ 180 min, sludge settling time is 9 ~ 120 min, and aeration rate 0.3 ~ 0.5 m3/h. The aerobic granular sludge has yellow appearance, with a size of 1 ~ 2 mm, SVI of 40 mL/g or so, and MLSS of 6515 mg/L. The average settling velocity is up to 18.42 m/h. Aerobic granular sludge contains large amounts of protozoa and metazoan which emerge in groups. The removal rates of COD, TN and TP is respectively up to 95%, 96% and 98%.

Keywords

batch processing (industrial); chemical reactors; microorganisms; sludge treatment; wastewater treatment; SBR reactor; aeration time; aerobic granular sludge; average settling velocity; cultivation; metazoan; ordinary flocculent activated sludge; protozoa; room temperature; seeding sludge; sequencing batch reactor; synthetic domestic wastewater; Carbon; Inductors; Microorganisms; Optical microscopy; Presses; Sewage treatment; Wastewater; Aerobic granular sludge; MLSS; SVI; cultivation; removal rate; settling time;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Technology and Civil Engineering (ICETCE), 2011 International Conference on

Conference_Location

Lushan

Print_ISBN

978-1-4577-0289-1

Type

conf

DOI

10.1109/ICETCE.2011.5775812

Filename

5775812