| Autor: |
Paul E; Laboratory of Environmental Process Engineering (LIPE)-INSA-Toulouse, France. etienne.paul@insatoulouse.fr, Wolff DB, Ochoa JC, da Costa RH |
| Jazyk: |
angličtina |
| Zdroj: |
Water environment research : a research publication of the Water Environment Federation [Water Environ Res] 2007 Jul; Vol. 79 (7), pp. 765-74. |
| DOI: |
10.2175/106143006x123139 |
| Abstrakt: |
The reduction of organic and nitrogen pollution of wastewater was investigated in two hybrid reactors and compared with the reduction obtained by using a conventional activated sludge reactor (ASR) run as a control. Both HR-1 and HR-2 were activated sludge systems where a low-density carrier, P1 (polyethylene) for HR-1 and P2 (recycled plastics) for HR-2, was added. Firstly, the three reactors were operated at 10 days Suspended Solid Retention Time (SRT(SS)), leading to a complete nitrification. Secondly, the SRT(SS) for each reactor was lowered to 3 days. Nitrification was lost for the ASR but remained complete for HR's. Respirometric techniques were used to measure fixed or suspended biomass activities for heterotrophic and autotrophic biomass. More than 90% of the autotrophic activity was found on the supports whatever the SRT(SS) used. The results may underline the role of the carrier geometry or surface characteristics on the autotrophic/heterotrophic microorganism distribution. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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