Process optimization of an aerobic upflow sludge blanket reactor system

Sharma, Keshab Raj and Huang, Ju-Chang (2005) Process optimization of an aerobic upflow sludge blanket reactor system. Journal Of Environmental Engineering-ASCE, 131 6: 901-908. doi:10.1061/(ASCE)0733-9372(2005)131:6(901)

Author Sharma, Keshab Raj
Huang, Ju-Chang
Title Process optimization of an aerobic upflow sludge blanket reactor system
Journal name Journal Of Environmental Engineering-ASCE   Check publisher's open access policy
ISSN 0733-9372
Publication date 2005
Sub-type Article (original research)
DOI 10.1061/(ASCE)0733-9372(2005)131:6(901)
Volume 131
Issue 6
Start page 901
End page 908
Total pages 8
Place of publication Reston
Publisher Asce-Amer Soc Civil Engineers
Collection year 2005
Language eng
Subject C1
0907 Environmental Engineering
Abstract Response of an aerobic upflow sludge blanket (AUSB) reactor system to the changes in operating conditions was investigated by varying two principle operating variables: the oxygenation pressure and the flow recirculation rate. The oxygenation pressure was varied between 0 and 25 psig (relative), while flow recirculation rates were between 1,300 and 600% correspondingly. The AUSB reactor system was able to handle a volumetric loading of as high as 3.8 kg total organic carbon (TOC)/m(3) day, with a removal efficiency of 92%. The rate of TOC removal by AUSB was highest at a pressure of 20 psig and it decreased when the pressure was increased to 25 psig and the flow recirculation rate was reduced to 600%. The TOC removal rate also decreased when the operating pressure was reduced to 0 and 15 psig, with corresponding increase in flow recirculation rates to 1,300 and 1,000%, respectively. Maintenance of a high dissolved oxygen level and a high flow recirculation rate was found to improve the substrate removal capacity of the AUSB system. The AUSB system was extremely effective in retaining the produced biomass despite a high upflow velocity and the overall sludge yield was only 0.24-0.32 g VSS/g TOC removed. However, the effluent TOC was relatively high due to the system's operation at a high organic loading.
Keyword Engineering, Environmental
Engineering, Civil
Environmental Sciences
Granular Sludge
Shear Force
Bed Reactors
Q-Index Code C1

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Created: Wed, 15 Aug 2007, 06:11:45 EST