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Pakistan Journal of Biological Sciences
  Year: 2007 | Volume: 10 | Issue: 18 | Page No.: 3039-3047
DOI: 10.3923/pjbs.2007.3039.3047
 
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Evaluation of Operation of Submerged Aerated Filters in Wastewater Treatment and Excess Sludge Production

Mohammad A. Baghapourm and Ibrahim Jabbari

Abstract:
The aims of this study were to evaluate the SCOD removal efficiency in submerged biological aerated filters (BAFs) and subsequently to assess the relationship between the specific surface area (Ss) and Excess Sludge Production (ESP) rate in such filters. Accordingly, four filters with different porosity and specific surface (647, 295, 175 and 136 m2 m-3) have been loaded with synthetic wastewater based on low fat dry milk powder with COD of 1500 mg L-1 in different hydraulic retention time (8, 4, 2, 1 and 0.5 h). In this study, it was shown that specific surface increase of the filters initially increases the efficiency of the filters and after a certain value, the filter efficiency remains uncharged or decreases, as in HRT of 8 h the SCOD removal efficiency of filters 1 and 2 (Ss = 647 m2 m-3 and Ss = 295 m2 m-3) were 89.8 and 91% at VOL of 3.195 and 3.727 kg COD m-3 d-1, respectively. Also, the results showed that in all the filters, the production rate of suspended sludge increases inversely with the hydraulic retention time and the media with higher porosity (90.5%) produced less suspended sludge (8-57 g m-3) despite having lower efficiency in the SCOD removal.
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How to cite this article:

Mohammad A. Baghapourm and Ibrahim Jabbari , 2007. Evaluation of Operation of Submerged Aerated Filters in Wastewater Treatment and Excess Sludge Production. Pakistan Journal of Biological Sciences, 10: 3039-3047.

DOI: 10.3923/pjbs.2007.3039.3047

URL: https://scialert.net/abstract/?doi=pjbs.2007.3039.3047

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