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Optimizing OLR and HRT in a UASB reactor for pretreating high- Strength municipal wastewater

Hazrati, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.3303/CET1124215
  3. Abstract:
  4. This study was carried out for examination of a lab-scale UASB reactor for optimization of organic loading rate and hydraulic retention time. The total volume of the reactor was 5 1 with an effective height of 160 cm and diameter of 5 cm. This reactor was used to treat fortified municipal wastewater at volumetric organic loadings of 3.6, 7.2, 10.8, and 14.4 kg m3 d 1 at temperature 30°C. The result of present work indicated an optimum range for organic loading (7.2 to 10.8 kg m-3 d-1) with COD removal efficiency of about 85%. Moreover, optimum HRT for influent COD concentration of 1200mg/l is shown to be only 4 hours. Furthermore nitrate removal efficiency was about 80% at optimized organic loading range, with a sharp decrease beyond this range (e.g. up to 30% decrease for 14.4 kg/m 3.d and up to 45% decrease for 3.6 kg/m3.d)
  5. Keywords:
  6. Optimization ; Removal ; Wastewater ; Wastewater treatment ; COD removal efficiency ; Effective height ; High-strength ; Hydraulic retention time ; Municipal wastewaters ; Nitrate removal ; Organic loading rates ; Organic loadings ; UASB reactor ; Volumetric organic loading ; Loading
  7. Source: Chemical Engineering Transactions ; Volume 24 , 2011 , Pages 1285-1290 ; 19749791 (ISSN)
  8. URL: http://www.aidic.it/icheap10/webpapers/202Hazrati.pdf