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Start-up Of Anaerobic Ammonium Oxidation ( Anammox ) From Conventional Return Activated Sludge In Up-flow Anaerobic Sludge Blanket (uasb) Reactor For Autotrophic Nitrogen Removal From Wastewater

Submitted2012-01-18
Last Update2012-01-18
TitleStart-up Of Anaerobic Ammonium Oxidation ( Anammox ) From Conventional Return Activated Sludge In Up-flow Anaerobic Sludge Blanket (uasb) Reactor For Autotrophic Nitrogen Removal From Wastewater
Author(s)Author #1
Author title:
Name: Qais Banihani
Org: Assistant Professor, Department of Civil Engineering, University of Jordan, Amman 11942, Jordan,
Country:
Email: q.banihani@ju.edu.jo

Author #2
Author title:
Name: Nidal Hadadin
Org: Associate Professor, Department of Civil Engineering, The Hashemite University, P.O.Box: 150459
Country:
Email:

Author #3
Author title:
Name: Ahmad Jamrah
Org: Professor, Department of Civil Engineering, University of Jordan, Amman 11942, Jordan
Country:
Email:

Other Author(s)
Contact AuthorAuthor #1
Alt Email: qaisbh@gmail.com
Telephone:
KeywordsAnammox, Start-up, Up-flow anaerobic sludge blanket (UASB), Endogenous denitrification, Biological nutrient removal, Return activated sludge
AbstractA bench-scale up-flow anaerobic sludge blanket (UASB) reactor was applied to start-up the anaerobic ammonium oxidation (Anammox) process from conventional return activated sludge. The reactor was operated for approximately 170 days and was fed synthetic wastewater containing mainly nitrite (NO2 ) − and ammonium (NH4 ) + as main substrates. After 106 days of operation, the first evidence of Anammox activity was detected in the reactor by simultaneous consumption of − 2 NO and + 4 NH coupled to the production of nitrate (NO3 ) − . The start-up period of the Anammox UASB reactor was within 4.5 months. During the course of the start-up period, three distinct stages were distinguished: cell lysis, Anammox cultivation and finally the appearance and enrichment of Anammox bacteria. On the basis of the results, it seems that the successful cultivation of Anammox bacteria in this study was probably due to the capacity of UASB reactor in retaining Anammox biomass and the inherent properties of the activated sludge.
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