污泥停留時間對階梯流水SBR氮磷去除之影響

Effect of Sludge Retension Time on Nutrient Removal in a Step-Feed Sequencing Batch Reactor

林瑩峰(Ying-Feng Lin) ； 荊樹人(Shuh-Ren Jing) ； 蘇青瑾(Ching-Chin Su) ； 林俊屹(Jiun-Yi Lin) ； 施男遜(Nan-Hsun Shih) ； 盧秀慧(Shiou-Hwei Lu) ； 馬家珍(Jia-Jen Ma)

《醫護科技學刊》 3卷1期 (2001/01) Pp. 55-66

https://doi.org/10.6563/TJHS.2001.3(1).4

摘要

This study investigated the effect of sludge retention time (SRT) on the removal of high concentrations of organic carbon, nitrogen and phosphate in a bench-scale sequencing batch reactor operating with a three-stage alternating anoxic-oxic sequence and step-feed (SAOSBR) to treat synthetic wastewater. The SAOSBR was controlled at a constant volumetric loading rate and operated under various rates of sludge wasted to obtain SRTs of 6,11,and 21 days. Full nitrification(＞99%) and substantial denitrification (＞85%) efficiencies were achieved with SRTs of 11and 21days, resulting in nitrogen removal of 89.3-90.4%. An SRT of 6days led to remarkable decreases in both nitrification efficiency (4.2%) and denitrification efficiency (40%) and to a significant reduction in nitrogen removal (51.4%). Maximum phosphate removal of 97% was observed with an SRT of 11days. SRTs of 6days and 21days led to phosphate removal of 36%and 66%, respectively. The removal of chemical oxygen demand (COD) was not affected by SRT. Consequently, the optimal SRT was around 11days for nutrient removal.

關鍵字

階梯進流 ； 批式反應器 ； 硝化作用 ； 脫硝作用 ； 除磷 ； 污泥停留時間

並列摘要

This study investigated the effect of sludge retention time (SRT) on the removal of high concentrations of organic carbon, nitrogen and phosphate in a bench-scale sequencing batch reactor operating with a three-stage alternating anoxic-oxic sequence and step-feed (SAOSBR) to treat synthetic wastewater. The SAOSBR was controlled at a constant volumetric loading rate and operated under various rates of sludge wasted to obtain SRTs of 6,11,and 21 days. Full nitrification(＞99%) and substantial denitrification (＞85%) efficiencies were achieved with SRTs of 11and 21days, resulting in nitrogen removal of 89.3-90.4%. An SRT of 6days led to remarkable decreases in both nitrification efficiency (4.2%) and denitrification efficiency (40%) and to a significant reduction in nitrogen removal (51.4%). Maximum phosphate removal of 97% was observed with an SRT of 11days. SRTs of 6days and 21days led to phosphate removal of 36%and 66%, respectively. The removal of chemical oxygen demand (COD) was not affected by SRT. Consequently, the optimal SRT was around 11days for nutrient removal.

並列關鍵字

step-feed ； sequencing batch reactor ； nitrification ； denitrification ； phosphate removal ； sludge retention time