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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/4713
Title: Effect of organic shock loads on a two-stage activated sludge-biofilm reactor
Authors: Seetha N.
Bhargava R.
Kumar P.
Published in: Bioresource Technology
Abstract: The effects of short-term organic shock loads on the performance of a laboratory scale two-stage activated sludge (AS)-biofilm reactor working at 6 h HRT and treating medium strength domestic wastewater was studied by increasing the influent chemical oxygen demand (COD) to 2-4 times the normal values. Each shock load was applied for a period of 6 h, after which normal loading conditions were resumed. The maximum effluent COD concentration obtained was 169, 169, 250 and 617 mg/L under the shock loads of 808, 1170, 1358 and 1900 mg COD/L, respectively. The COD removal rate increased with increasing effective OLR. The system recovered quickly from shock loads; recovery time proportional to the magnitude of shock loads. The optimum loading rate of the reactor was found at effective OLR of 170 mg COD/m3/h. Shock loads changed the dominant bacterial type in the reactor from Gram-positive rods to Gram-negative oval shaped bacteria. ¬© 2009 Elsevier Ltd. All rights reserved.
Citation: Bioresource Technology(2010), 101(9): 3060-3066
URI: https://doi.org/10.1016/j.biortech.2009.12.055
http://repository.iitr.ac.in/handle/123456789/4713
Issue Date: 2010
Keywords: Activated sludge-biofilm reactor
Biomass characteristics
Optimum loading rate
Organic shock loads
Sewage treatment plant
ISSN: 9608524
Author Scopus IDs: 35280746200
7102281661
57206834879
Author Affiliations: Seetha, N., Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Bhargava, R., Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Kumar, P., Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Corresponding Author: Seetha, N.; Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India; email: seetha_183@yahoo.co.in
Appears in Collections:Journal Publications [CE]

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