CAJ | 학술논문

采用一体式膜生物反应器（ MBR）处理水产养殖废水，对处理过程中MBR膜污染的特征进行研究。首先，选取污泥浓度（ MLSS）、水力停留时间（ HRT）和曝气量这3个与膜污染有密切关系的变量，通过组合优化，研究操作条件对膜污染的影响，并确定最佳操作条件；其次，在最优化参数组合情况下，通过长期稳定运行，确定膜压增长特点；最后，通过膜阻力分布分析，得出造成膜污染的最主要原因。结果显示，对膜污染的贡献依次为：曝气量＞HRT＞MLSS；最佳的操作参数组合为曝气量437．5 L/h，HRT 4．25 h，MLSS 2．2 g/L；长期稳定运行过程中，发现膜压增长呈现出快速增长、平稳增长、急剧增长的3个阶段；通过膜阻力分布分析，得出由胞外聚合物（EPS）和微生物代谢产物（SMP）形成的吸附性膜孔阻塞是造成膜污染的最主要原因。因此，优化操作条件和减少混合液中EPS和SMP是减轻膜污染的重要手段。
채용일체식막생물반응기（ MBR）처리수산양식폐수，대처리과정중MBR막오염적특정진행연구。수선，선취오니농도（ MLSS）、수력정류시간（ HRT）화폭기량저3개여막오염유밀절관계적변량，통과조합우화，연구조작조건대막오염적영향，병학정최가조작조건；기차，재최우화삼수조합정황하，통과장기은정운행，학정막압증장특점；최후，통과막조력분포분석，득출조성막오염적최주요원인。결과현시，대막오염적공헌의차위：폭기량＞HRT＞MLSS；최가적조작삼수조합위폭기량437．5 L/h，HRT 4．25 h，MLSS 2．2 g/L；장기은정운행과정중，발현막압증장정현출쾌속증장、평은증장、급극증장적3개계단；통과막조력분포분석，득출유포외취합물（EPS）화미생물대사산물（SMP）형성적흡부성막공조새시조성막오염적최주요원인。인차，우화조작조건화감소혼합액중EPS화SMP시감경막오염적중요수단。
In order to study on the characteristics of membrane fouling, the integrated membrane bioreactor ( MBR) is applied to treat aquaculture wastewater. First, hydraulic retention time ( HRT) , aeration quantity and mixed liquid suspended solid ( MLSS) which have close relationship with membrane fouling are chosen to research the influence of operating conditions on membrane fouling through combinatorial optimization and then confirm the optimal operational condition. Second, determine the growth characteristics of membrane pressure through a long-term stable operation with the optimal parameter combinations. Finally, analyze the contributions of membrane resistance and then get the main cause of membrane fouling . The results show that influence degree of the parameters is, in order, aeration quantity, HRT, MLSS. Under this experimental condition, 437.5 L/h for aeration quantity, 4.25 h for HRT, 2.2 g/L for sludge concentration is the optimal parameters. With a long-term stable operation, it is found that the increase of membrane pressure presents three stages, including rapid growth , steady growth and sharp increase. By analysis distribution of the membrane resistance, absorption film pollution caused by extracellular polymeric substances ( EPS ) and soluble microbial products (SMP) is the main reason for membrane fouling. Therefore, to reduce the influence of EPS as well as SMP and to optimize operation conditions are essential.