| Autor: |
Talaiekhozani, Amirreza, Jorfi, Sahand, Fulazzaky, Mohamad Ali, Ponraj, Mohanadoss, Abd Majid, M.Z., Navarchian, Amir Hossin, Talaie, Mohammad Reza, Zare, Sonia |
| Zdroj: |
Desalination & Water Treatment; June 2014, Vol. 52 Issue: 19-21 p3585-3593, 9p |
| Abstrakt: |
ABSTRACTPropylene glycol (PG) is not a toxic matter. However, it can dramatically increase BOD of water resources and that is why removal of PG is important. Removal of PG in synthetic wastewater was studied in a continuous activated sludge pilot-scale reactor. The influence of various factors (pH, nitrogen source, COD and wastewater feed salinity (conductivity)) on micro-organism growth as a measure of removal was determined, and the optimum condition for maximizing this response was obtained using Taguchi experimental design method. Primary micro-organisms were obtained from the return sludge line of the Shahrak-Gharb wastewater treatment system located in the city of Tehran. The micro-organisms have been adapted to high organic loads during five stages in 119 days. The maximum PG removal efficiency was equal to 85%. In the selected range of levels, the best pH was equal to 8 and the influent COD was 1300 mg/L. The best nitrogen source was urea, and salinity was obtained equal to 8%. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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