Application of Membrane-Separation Technology

［中文文摘］报道膜分离技术用于垃圾渗沥水、6 -氨基青霉烷酸 (6 - APA)裂解液以及维生素 C发酵液中的分离浓缩过程 ,各项实验均进行了中试放大 ,取得了良好的效果．［英文文摘］This report introduce the applications of membrane separation in landfill leachate treatment and the separation concentration of 6 aminopenicillanic acid and 2 keto L gulonic acid. All experiments were carried out in pilot plant scale and the performances of membranes in the three kinds of feed solutions mentioned above were satisfactory.国家“九五”攻关 (96 - C0 2 - 0 2 - 0 1);教育部重点科技;教育部骨干教师基金;教育部回国人员基金;福建省自然科学基金(C9910003) 资助项目

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