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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Iranian Journal of Biotechnology
- نوع مقاله: Journal Article
- کلمات کلیدی: Pseudomonas aeruginosa,Statistical analysis,Rhamnolipid,Batch process,Fed batch process
- چکیده:
- چکیده انگلیسی: This paper presents a comparison between batch and three different sets of fed batch fermentations for
rhamnolipid production by Pseudomonas aeruginosa. The batch run was performed with 500 ml of culture
medium having the initial glycerol and sodium nitrate concentrations of 30 and 8.3 g/l, respectively. For a fed
batch run with nitrogen source in feed, 250 ml of the nitrogen excluded culture medium was in the bioreactor
initially, and 250 ml culture medium containing 16.6 g/l sodium nitrate was fed to the bioreactor continuously.
A similar procedure was repeated for fed batch runs with carbon, and phosphorus source in feed. Statistical
analysis showed that fed batch runs were better than batch in term of rhamnolipid production, and among
the fed batch runs the maximum amount of rhamnolipid. (4.12 g Rhamnose Equivalent/l) was for the fed
batch run with the carbon source in feed.- انتشار مقاله: 10-07-1391
- نویسندگان: Mohammad Ghomi Avili,Mohammad Hassan Fazaelipoor,Seyed Ali Jafari,Seyed Ahmad Ataei
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Environmental Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Sequencing Batch Reactor (SBR),Petrochemical wastewater,Optimum operation time
- چکیده:
- چکیده انگلیسی: Sequencing batch reactor (SBR) technology has found many applications in industrial wastewater treatment in recent years. The aim of this study was to determine the optimal time for a cycle of the sequencing batch reactor (SBR) and evaluate the performance of a SBR for petrochemical wastewater treatment in that cycle time. The reactor was operated with a suspended biomass configuration under aerobic conditions. Carbon removal and operating parameters such as pH, temperature and dissolved oxygen (DO) were monitored during the wastewater treatment. The SBR was run at different cycle times and amongst the cycle times tested, the best performance was obtained with a 7 h cycle time composed of a fill time of 15min, reaction of 6 h, settling of 30 min, and withdrawal of 15 min. The SBR with the determined cycle time was used to study the treatment of wastewater with various organic loading rates (12.88 gr COD/L.d, 18.02 gr COD/L.d and 31.39 gr COD/L.d). The SBR performance was evaluated by chemical oxygen demand (COD), total solids (TS) total suspended solids (TSS) removal efficiencies. During the shock loading tests, the maximum COD, TS and TSS removal efficiencies were 84%, 67% and 92%, respectively.
- انتشار مقاله: 13-11-1394
- نویسندگان: Mina Salari,Seyed Ahmad Ataei,Fereshteh Bakhtiyari
- مشاهده