膜技术处理赖氨酸生产废水的研究

为了确定赖氨酸生产废水经过膜技术处理后废水中的CODcr值的大小 ,我们采用超滤与纳滤相结合的工艺分别对浓废水和稀废水进行中试实验。实验结果表明 :采用超滤 -一级纳滤 -二级纳滤工艺流程处理浓废水 ,终端废水的CODcr值降低到 489mg/L ;采用超滤 -纳滤流程处理稀废水 ,最终透析液的CODcr值可以降低到 5 0 2mg/L。大大减轻了后续生化处理的负荷

Application of nanofiltration in preparation of reactive red 3BS

对活性红 3BS染料进行了纳滤中试实验 .结果表明 ,利用合适的纳滤膜对该染料进行脱盐浓缩是可行的 .该方法不仅可以大幅度降低染料合成浆液中的无机盐含量 ,并可对染料浆液浓缩达 3倍左右 ,使染料的着色强度和含固量明显提高 ;染料的损失率极低 ,同时对副染料也可以部分脱除 .The application of nanofiltration in the pilot-scale pre paration of reactive red 3BS has been studied. It was shown that it was feasible for an appropr iate nano filtration membrane to desalt and concentrate the dyestuff. It can not only grea tly reduce the inorganic salt content in the raw synthetic dye solution, but als o concentrate it by a factor of up to 3, thus considerably improving the dye st rength and the content of the product dye. At the same time, loss of the product dye was rather low, and the by-products can be partly removed.福建省自然科学基金和教育部回国人员启动基金资助项

Research on the Performance of Integrated Gate Commutated Thyristor

It presented the structure of IGCT and its features in four operating stages (blocking state, turn-on, on-state and turn-off). It introduced the main parameters and application notices in the four operating stages

A PILOT SCALE EXPERIMENT ON VC-MAKING WASTEWATER TREATMENT BY MEMBRANE BIO-REACTOR

主要介绍了某维生素制造企业废水系统运行情况以及MBR改造工艺的启动方法和在不同工艺条件下的运行情况。通过比较2种工艺条件,确定污泥浓度控制在8000mg/L,溶解氧控制在2mg/L,水力停留时间14h,系统对CODCr的平均去除率能达到90·20%,氨氮的平均去除率能达到89·95%。It is maily introduced the performance of a wastewater plant of a VC-producing company and the start-up method of the VC wastewater treated by the MBR process and the running under different conditions of the system.Through comparing two different process conditions,when the sludge concentration is controlled at 8 0000 mg/L ,DO controlled at 2 mg/L and the HRT controlled at 14 hours,the average COD_ Cr removal rate will be 90.2% and the NH_3-N removal rate will be 89.95%

PILOT RESEARCH ON UASB-CASS REFORM PROCESS WITH MBR FOR TREATMENT OF BINARY ACID WASTEWATER

介绍了直链二元酸废水原有处理系统运行情况及使用MBR改造工艺的启动以及在无排泥情况下的8种运行工况。通过比较分析,确定污泥浓度控制在7000～9700mg/L、溶解氧为2～3mg/L时,HRT可缩短至2d,MBR工艺出水水质稳定良好,COD、NH4+-N均值分别为79mg/L和1.6mg/L,优于污水综合排放标准(GB8978-1996)的二级排放标准。In this paper is introduced the operating condition of the original UASB-CASS for treating linear binary acid wastewater, and eight operating conditions of its reform process with MBR in case of starting and non-sludge discharging. Through analysis and comparison, it is shown that, when sludge concentration was 7000～9700mg/L,DO was 2～3mg/L,HRT can be shorten to 2 d, the effluent quality of MBR is better,COD,NH4+-N average values are 79 mg/L and 1.6 mg/L respectively, being superior to the second class discharging standard of "Sewage Comprehensive Discharging Standard"(GB8978-1996)

超滤技术在赖氨酸生产中的应用

本文研究采用超滤膜技术直接处理赖氨酸的发酵夜。实验结果表明,所用的超滤系统能够一步截留未经过任何处理的赖氨酸发酵液中的菌体蛋白、固体颗粒等杂质,赖氨酸有效成分的损失率可以控制在3％以内,即超滤的收率可达97％以上.滤渣的量约为原料体积的10％,而同等量的发酵液经过离子交换后,浓废水量约为该滤渣的20倍,所以大大减少了后续污物处理的压力。膜通量的衰减幅度较小,膜设备运行良好

Prediction of Energy Resolution in the JUNO Experiment

International audienceThis paper presents the energy resolution study in the JUNO experiment, incorporating the latest knowledge acquired during the detector construction phase. The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV. To achieve this ambitious goal, significant efforts have been undertaken in the design and production of the key components of the JUNO detector. Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution, extending beyond the statistical fluctuations of the detected number of photons, such as the properties of liquid scintillator, performance of photomultiplier tubes, and the energy reconstruction algorithm. To account for these effects, a full JUNO simulation and reconstruction approach is employed. This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution. The study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the study assesses the contribution of major effects to the overall energy resolution budget. This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors