کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4987097 | 1455144 | 2017 | 37 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of operational models (batch, continuous and CFID modes) on the performance of a single A2O airlift bioreactor for treatment of milk processing wastewater
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effects of operational models (batch, continuous and CFID modes) on the performance of a single A2O airlift bioreactor for treatment of milk processing wastewater Effects of operational models (batch, continuous and CFID modes) on the performance of a single A2O airlift bioreactor for treatment of milk processing wastewater](/preview/png/4987097.png)
چکیده انگلیسی
This study surveys the effect of different operational models, batch, continuous, and continuous feeding with intermittent discharge (CFID), on the performance of an air lift reactor (ALR) and a stirred tank reactor (STR) in terms of simultaneous removal of CNP from milk processing wastewater. The experimental data were recorded under similar operating conditions with HRT of 10Â h, air flow rate of 2Â l/min, and biomass concentration of 5-6Â g/l. The obtained results indicated that the CFID mode was a promising regime which ensured the occurrence of anaerobic, anoxic, and aerobic conditions in the air lift bioreactor. This gave favorable conditions for simultaneous COD and nutrient removal processes in one compartment. At the optimum condition obtained, 170Â mg/l (79%) of total nitrogen (TN) and 25Â mg/l (63%) phosphorus (TP) were removed in the CFID-ALR, while, batch and continuous operational conditions did not create anaerobic and efficient anoxic zones in the air lift bioreactor. The ALR was more effective to remove nutrients when compared to the STR at all different operational modes studied. The microbial community at different experimental conditions was also investigated to detect Candidatus Accumulibactor as a common species of phosphate accumulating organism (PAOs) through PCR method. From the PCR results, Candidate Accumulibactor was detected in the CFID-ALR, underpinning the observed TP removal.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Research and Design - Volume 125, September 2017, Pages 471-482
Journal: Chemical Engineering Research and Design - Volume 125, September 2017, Pages 471-482
نویسندگان
Azar Asadi, Ali Akbar Zinatizadeh, Mark van Loosdrecht,