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Performance evaluation of UASB system for treating slaughterhouse wastewater

Torkian, A ; Sharif University of Technology | 2002

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  1. Type of Document: Article
  2. Publisher: Sharif University of Technology , 2002
  3. Abstract:
  4. Direct discharge of high-strength industrial effluent often upsets municipal wastewater treatment plant processes. This pilot study was undertaken to evaluate the performance of a UASB system in pre-treating effluent from a medium-size traditional slaughterhouse. Experiments were conducted in a continuous flow 500-1 pilot plant initially inoculated with 200 1 municipal anaerobic digested sludge. With an influent COD concentration of 3000-5000 mg/l, the system was started with a loading of 1.8 kg COD/m3.d (F/M of 0.24 kg COD/kg VSS.d) at 25°C. The granules formed after 4 months of operation were dark brownish with a diameter of 1-4 mm and a settling velocity of 20 m/hr. Once granules were formed, upflow velocity was gradually increased to 0.8-1 m/hr (HRT of 2.5 hr) and VSS concentration reached 25 g/l. It was possible to increase the loading up to 14 kg COD/m3.d (F/M of 1.4 kg COD/VSS.d) at 29°C with total COD removal efficiencies of 85-90%. Under these conditions 250-350 1 gas (75% methane) was generated for each kg COD removed
  5. Keywords:
  7. Source: Scientia Iranica ; Volume 9, Issue 2 , 2002 , Pages 176-180 ; 10263098 (ISSN)
  8. URL: http://scientiairanica.sharif.edu/article_2716.html