High rate settler in biological system for oil and soap wastewater treatment

High rate settler in biological system for oil and soap wastewater treatment

Wastewater from an oil and soap company provided the material of this study. The company discharges 31,000 m3/d of untreated wastewater into the Nile River. The wastewater was highly contaminated with organic and inorganic pollutants. An end-of-pipe treatment scheme was devised of dissolved air flot...

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Veröffentlicht in:Water science and technology 1995-12, Vol.32 (11), p.39-44
Hauptverfasser: Abou-Elela, S. I., Ashmawy, A., Aly, H. I., Ahmed, H. M.
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container_end_page 44
container_issue 11
container_start_page 39
container_title Water science and technology
container_volume 32
creator Abou-Elela, S. I.
Ashmawy, A.
Aly, H. I.
Ahmed, H. M.
description Wastewater from an oil and soap company provided the material of this study. The company discharges 31,000 m3/d of untreated wastewater into the Nile River. The wastewater was highly contaminated with organic and inorganic pollutants. An end-of-pipe treatment scheme was devised of dissolved air flotation with/without alum followed by biological degradation. The biological unit was compact and comprised an aeration tank based on a completely mixed activated sludge process followed by a high rate settler. The unit was operated at two organic loads, namely 1.44 and 2.88 kg BOD5/m3/d. The results obtained showed that this scheme of treatment produced a high quality effluent suitable for disposal into surface water or reuse. Also, the high rate settler acted as a biological reactor as well as a settler for finely divided organic matter.
doi_str_mv 10.2166/wst.1995.0397
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