CAJ | 학술논문

以膜生物反应器(membrane bioreactor,MBR)中活性污泥为研究对象,考察了溶解性微生物代谢产物(soluble microbial product,SMP)的形成及降解机制,并探讨了SMP对膜过滤的影响.实验结果表明,在基质存在时反应器内的SMP主要以基质利用相关型产物(utilization associated products,UAP)为主;当基质耗尽后,生物生长相关型产物(biomass associated product,BAP)浓度增加;内源呼吸过程中BAP的产出主要来源于松散胞外聚合物(loosely bound EPS,LB)的水解;通过傅里叶变换红外光谱(FTIR)检测表明,UAP主要由多聚糖和蛋白质组成,而BAP主要是多聚糖和腐殖酸;与UAP相比,膜对BAP截留效果较好,最佳的水力停留时间(hydraulic retention time,HRT)时MBR出水同时包含UAP及BAP,BAP浓度与膜过滤阻力呈显著正相关.
이막생물반응기(membrane bioreactor,MBR)중활성오니위연구대상,고찰료용해성미생물대사산물(soluble microbial product,SMP)적형성급강해궤제,병탐토료SMP대막과려적영향.실험결과표명,재기질존재시반응기내적SMP주요이기질이용상관형산물(utilization associated products,UAP)위주;당기질모진후,생물생장상관형산물(biomass associated product,BAP)농도증가;내원호흡과정중BAP적산출주요래원우송산포외취합물(loosely bound EPS,LB)적수해;통과부리협변환홍외광보(FTIR)검측표명,UAP주요유다취당화단백질조성,이BAP주요시다취당화부식산;여UAP상비,막대BAP절류효과교호,최가적수력정류시간(hydraulic retention time,HRT)시MBR출수동시포함UAP급BAP,BAP농도여막과려조력정현저정상관.