CAJ | 학술논문

[目的]利用污泥微膨胀的特性来净化水质、节约能源。[方法]分别从低负荷（0.25 kgCOD/(kgMLSS·d)）和中高负荷（0.55 kgCOD/(kgMLSS·d)）两个点出发，改变 A/O系统好氧池中的溶解氧浓度，来考察溶解氧对污泥膨胀的影响。[结果]在 A/O活性污泥系统中，当污泥负荷为0.25 kgCOD/(kgMLSS·d)、DO=1.5 mg/L时，污泥指数在250左右，污泥负荷为0.55 kgCOD/(kgMLSS·d)、DO=1.5 mg/L时，污泥指数接近300，系统发生了微膨胀现象。污泥微膨胀时系统对 COD、SS、氮、磷等的去除率依然较高。[结论]在低溶解氧条件下可以提高氧转移速率，减少曝气量，具有节能的效果。
[목적]이용오니미팽창적특성래정화수질、절약능원。[방법]분별종저부하（0.25 kgCOD/(kgMLSS·d)）화중고부하（0.55 kgCOD/(kgMLSS·d)）량개점출발，개변 A/O계통호양지중적용해양농도，래고찰용해양대오니팽창적영향。[결과]재 A/O활성오니계통중，당오니부하위0.25 kgCOD/(kgMLSS·d)、DO=1.5 mg/L시，오니지수재250좌우，오니부하위0.55 kgCOD/(kgMLSS·d)、DO=1.5 mg/L시，오니지수접근300，계통발생료미팽창현상。오니미팽창시계통대 COD、SS、담、린등적거제솔의연교고。[결론]재저용해양조건하가이제고양전이속솔，감소폭기량，구유절능적효과。
This study aimed to make use of the limited filamentous sludge bulking characteristics to purify water quality and save energy. [Method] The effects of dissolved oxygen (DO) on sludge bulking were explored by changing the DO con-centration in the aerobiotic pool of A/O system from the low load (0.25 kg COD/(kg MLSS·d)) and the medium to high load (0.55 kgCOD/(kg MLSSod)). [Result] ln the A/O activated sludge system, when the sludge load was 0.25 kg COD/(kg MLSS·d), DO=1.5 mg/L, the sludge index was at around 250, while when the sludge load-ing was 0.55 kg COD/(kg MLSS·d), DO=1.5 mg/L, the sludge index was close to 300, occurring the limited filamentous bulking. The bulked sludge stil showed high removal rates to COD, SS, nitrogen and phosphorus. [Conclusion] lt could improve the oxygen transfer rate and reduce the aeration rate at low DO conditions to achieve energy-saving.