|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|4996657||1368272||2018||7 صفحه PDF||سفارش دهید||دانلود کنید|
- Effects of C/N ratio on SAAMB-AnGMBR performance were investigated.
- Lower C/N ratios negatively affected nutrient removal and granular properties.
- The SAAMB-AnGMBR exhibited lower fouling propensity at higher C/N ratios.
- EPS was the influencing factor to membrane fouling at varying C/N ratios.
- The SAAMB-AnGMBR performance could recover after increasing C/N ratio.
This study aimed to evaluate the impact of C/N ratio on the performance of a hybrid sponge-assisted aerobic moving bed-anaerobic granular membrane bioreactor (SAAMB-AnGMBR) in municipal wastewater treatment. The results showed that organic removal efficiencies were above 94% at all C/N conditions. Nutrient removal was over 91% at C/N ratio of 100/5 but was negatively affected when decreasing C/N ratio to 100/10. At lower C/N ratio (100/10), more noticeable membrane fouling was caused by aggravated cake formation and pore clogging, and accumulation of extracellular polymeric substances (EPS) in the mixed liquor and sludge cake as a result of deteriorated granular quality. Foulant analysis suggested significant difference existed in the foulant organic compositions under different C/N ratios, and humic substances were dominant when the fastest fouling rate was observed. The performance of the hybrid system was found to recover when gradually increasing C/N ratio from 100/10 to 100/5.
Journal: Bioresource Technology - Volume 247, January 2018, Pages 340-346