Study on Methods for Membrane Fouling Control and Membrane Cleaning in Thin plate Membrane Bioreactor

膜生物反应器(MBR)是将先进膜分离技术和传统生物处理技术结合而成的一种新型污水处理工艺。由于膜的高效截留作用，反应器能够维持很高的污泥浓度，从而降低了污泥负荷，提高了系统的处理效率。然而，膜污染是当前限制MBR广泛应用的主要瓶颈，因为它会导致膜通量下降，增加膜组件清洗和更换的频率，从而增加MBR的运行费用。因此，膜生物反应器(MBR)稳定运行的核心问题之一是膜污染控制。鉴于此，本文分别研究了在线反冲洗和加入聚丙烯颗粒来延缓MBR中的膜污染。 采用平行对比试验的方法，研究伴有周期性次氯酸钠反冲洗的膜组件A和没有反冲洗的膜组件B处理园区废水。研究结果表明：COD去除率在90%以上、BOD5去除...Membrane Bioreactor (MBR), which combines traditional biological treatment techonology with advanced membrane technology, is a promising technology for wastewater treatment and reuse. Due to the high retention of membrane, the sludge concentration can be kept at a high level in the reactor. As a result, the loading rate of sludge can be reduced and the efficiency of MBR system can be improved. How...学位：理学硕士院系专业：材料学院材料科学与工程系_高分子化学与物理学号：2072007115002

The study of silicon carbide ceramic membrane used in oil-water separation

通讯作者:何旭敏 作者简介：叶世威(1984-)，男，福建南平人，在读硕士，师承蓝伟光教授，从事水处理与膜技术研[中文摘要]以孔径为0.1μm的碳化硅陶瓷膜,在跨膜压差0.2MPa、温度20℃、伴有固定时间间隔的反冲洗浓排条件下,通过死端过滤处理含油废水。结果表明,膜通量大,出水质量满足《碎屑岩油藏注水水质推荐指标及分析方法》标准(SY/T-532994)的要求,可以作为回注水;且膜简易清洗后,通量可100%恢复。[英文文摘]Under the conditions of temperature of 20℃ and transmembrane pressure(ΔTMP) of 0.2MPa,a silicon carbide ceramic membrane with a pore size of 0.1μm was introduced to treat oil wastewater with the dead end filtration method in conjunction with a periodical backwash technique.The membrane was found to exhibit high flux,and the quality of the permeate can meet the standards of the recommended "SY/T5329-94 of Injection Water Quality for Detrital Rock Oil Reservoirs and Analyzing Methods" of China.Especially,the membrane is easy to be cleaned,and membrane flux recovery can reach 100%

The study of silicon carbide ceramic membrane used in oil-water separation

作者简介：叶世威(1984-)，男，福建南平人，在读硕士，师承蓝伟光教授，从事水处理与膜技术研究。通讯作者：何旭敏[中文摘要]以孔径为0.1μm的碳化硅陶瓷膜,在跨膜压差0.2MPa、温度20℃、伴有固定时间间隔的反冲洗浓排条件下,通过死端过滤处理含油废水。结果表明,膜通量大,出水质量满足《碎屑岩油藏注水水质推荐指标及分析方法》标准(SY/T-532994)的要求,可以作为回注水;且膜简易清洗后,通量可100%恢复。[英文摘要]Under the conditions of temperature of 20℃ and transmembrane pressure(ΔTMP) of 0.2MPa,a silicon carbide ceramic membrane with a pore size of 0.1μm was introduced to treat oil wastewater with the dead end filtration method in conjunction with a periodical backwash technique.The membrane was found to exhibit high flux,and the quality of the permeate can meet the standards of the recommended "SY/T5329-94 of Injection Water Quality for Detrital Rock Oil Reservoirs and Analyzing Methods" of China.Especially,the membrane is easy to be cleaned,and membrane flux recovery can reach 100%

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies