摘要
研究了不同浸泡条件、污泥含量、曝气量和膜龄对平板膜污泥浓缩(MST)临界通量和膜渗透性的影响,并通过环境扫描电镜检测分析长期运行平板膜的表面损伤情况。结果显示,良好贮存条件及低污泥含量的操作条件有助于提升临界膜通量与起始膜渗透性;曝气量升高,膜渗透性提升且稳定性增强;随着膜龄增加,膜渗透性能变差;无机颗粒摩擦与清洗会增加平板膜表面粗糙度,降低膜渗透性能,NaClO清洗对膜面损伤甚为严重。
The influence of immersing conditions, sludge concentrations, aeration intensity and membrane age to critical flux and membrane permeability of membrane sludge thickening （MST） were studied in this article. Surface damage of long-running membrane was analyzed via environmental scanning electron microscopic （ESEM）. The results were followed： good immersing condition and low sludge concentration were conducive to the improvement of critical flux and initial membrane permeability; membrane permeability and its stability were improved with an increase of aeration intensity; with a longer membrane age, membrane permeability was decreased; an increased of membrane surface roughness and a decreased of membrane permeability were caused by the particles friction and cleaning. Serious membrane damage was observed after NaC10 cleaning.
出处
《水处理技术》
CAS
CSCD
北大核心
2011年第9期59-63,67,共6页
Technology of Water Treatment
关键词
平板膜污泥浓缩
临界通量
膜渗透性
flat membrane sludge thickening （MST）
critical flux
membrane permeability
