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学者姓名：周志伟
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摘要 ：
大型超滤水厂PVC和PVDF膜运行特性差异与优化
关键词 ：
膜通量 膜通量 膜污染 膜污染 超滤 超滤 膜材质 膜材质 参数调控 参数调控
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| GB/T 7714 | 于海宽 , 李星 , 周志伟 et al. 大型超滤水厂PVC和PVDF膜运行特性差异与优化 [J]. | 于海宽 , 2021 , 37 (1) : 28-33 . |
| MLA | 于海宽 et al. "大型超滤水厂PVC和PVDF膜运行特性差异与优化" . | 于海宽 37 . 1 (2021) : 28-33 . |
| APA | 于海宽 , 李星 , 周志伟 , 蔡传义 , 田希彬 , 焦振涛 et al. 大型超滤水厂PVC和PVDF膜运行特性差异与优化 . | 于海宽 , 2021 , 37 (1) , 28-33 . |
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摘要 ：
超滤技术已广泛应用于城镇给水处理厂,使得饮用水水质得到显著改善.不同材质超滤膜的运行周期、膜通量、跨膜压差(TMP)等的变化规律会有显著的差异,需要根据各自的特点对超滤系统进行运行参数调控与优化,以保证超滤系统的长期稳定运行.分析了山东某大型超滤水厂超滤系统长期运行的特点,对比了PVC膜和PVDF膜孔结构特征、膜通量、跨膜压差变化趋势及膜过滤阻力特性,调控和优化超滤系统运行参数,并进行了长时间的运行验证.结果表明,膜孔径和膜孔结构不同造成的膜污染是PVC膜与PVDF膜过滤特性差异的主要因素,恒定过滤周期运行模式下PVC膜通量加速衰减时段为82～220 min,造成PVC膜通量衰减了9.14％,并形成了约5％的永久衰减膜通量,而PVDF膜的通量衰减并不明显,使得水厂超滤系统在恒定过滤周期(180 min)运行模式下,出现了PVC膜的污染速率明显高于PVDF膜、系统的运行工况出现显著差异的现象.按照恒定过滤阻力模式运行时,PVC膜和PVDF膜的最佳过滤周期范围分别为82～108 min和96～155 min.水厂超滤系统在恒定过滤阻力运行模式下将PVC膜与PVDF膜在高温期和低温期的过滤周期分别调整为110、90 min和150、120 min,TMP的增长速率和化学维护清洗周期均基本一致,超滤系统实现了长期稳定运行.研究成果为我国超滤水厂中不同材质超滤膜的运行参数优化及协同稳定运行提供了参考.
关键词 ：
膜材质 膜材质 膜通量 膜通量 膜污染 膜污染 超滤 超滤 参数调控 参数调控
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| GB/T 7714 | 于海宽 , 李星 , 周志伟 et al. 大型超滤水厂PVC和PVDF膜运行特性差异与优化 [J]. | 中国给水排水 , 2021 , 37 (1) : 28-33 . |
| MLA | 于海宽 et al. "大型超滤水厂PVC和PVDF膜运行特性差异与优化" . | 中国给水排水 37 . 1 (2021) : 28-33 . |
| APA | 于海宽 , 李星 , 周志伟 , 蔡传义 , 田希彬 , 焦振涛 . 大型超滤水厂PVC和PVDF膜运行特性差异与优化 . | 中国给水排水 , 2021 , 37 (1) , 28-33 . |
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摘要 ：
建筑供水系统是城镇供水体系的终端,建筑的节能节水问题一直是业界关注的热点。建筑给水管道系统多采用枝状管网,存在节能节水方法不多、最不利点水压待优化、节能节水效率不高等问题。提出了基于最不利点的建筑给水立管设置成环状观点,采用EPANET软件建立了建筑给水立管系统模型,研究了建筑给水管道系统在不同流量、不同立管成环型式的最不利点水头损失变化规律,表明建筑立管成环型式均有明显的水头损失消减作用,确定出几种典型建筑给水立管成环型式的最不利点水头损失消减效果,其中2种管网的三立管成环型式的水头损失比单立管型式分别减小27.08%和50.47%;明确了建筑给水立管成环型式的连通管长度及管径之间适配性,确...
关键词 ：
最不利点 最不利点 流量 流量 建筑给水管道 建筑给水管道 水头损失 水头损失 立管成环 立管成环
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| GB/T 7714 | 刘航 , 杨艳玲 , 李星 et al. 建筑给水立管成环型式与水头损失消减效果研究 [J]. | 给水排水 , 2021 , 57 (03) : 118-124 . |
| MLA | 刘航 et al. "建筑给水立管成环型式与水头损失消减效果研究" . | 给水排水 57 . 03 (2021) : 118-124 . |
| APA | 刘航 , 杨艳玲 , 李星 , 周志伟 , 刘永旺 , 赵锂 . 建筑给水立管成环型式与水头损失消减效果研究 . | 给水排水 , 2021 , 57 (03) , 118-124 . |
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摘要 ：
建筑给水立管成环型式与水头损失消减效果研究
关键词 ：
最不利点 最不利点 建筑给水管道 建筑给水管道 立管成环 立管成环 水头损失 水头损失 流量 流量
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| GB/T 7714 | 刘航 , 杨艳玲 , 李星 et al. 建筑给水立管成环型式与水头损失消减效果研究 [J]. | 刘航 , 2021 , 47 (3) : 118-124 . |
| MLA | 刘航 et al. "建筑给水立管成环型式与水头损失消减效果研究" . | 刘航 47 . 3 (2021) : 118-124 . |
| APA | 刘航 , 杨艳玲 , 李星 , 周志伟 , 刘永旺 , 赵锂 et al. 建筑给水立管成环型式与水头损失消减效果研究 . | 刘航 , 2021 , 47 (3) , 118-124 . |
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摘要 ：
A Fe-doped graphite-like carbon nitride (g-C3N4) nanocomposites containing various Fe contents (5 wt.%, 10 wt. % and 15 wt.%) were prepared via two-step calcination thermal polymerization, and were employed as efficient heterogeneous photo-Fenton composites towards rhodamine B (RhB) removal in visible-light/H2O2 system. The sheet structure of g-C3N4 was refined down to nano-scale and less densely packed by the increasing Fe-doping ratio. X-ray diffraction (XRD), Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) spectra indicated that Fe was doped completely into the g-C3N4 lattice. Over 90 %RhB was degraded in photo-Fenton system within 45 min under the optimal Fe-doping ratio of 10 wt.% (10 % Fe-g-C3N4). The degradation efficiency of photo-Fenton was superior in comparison with photocatalysis and Fenton reaction. The as-prepared composite exhibited excellent performance (similar to 90 % removal) and high stability in a wide range of pH value (3 similar to 9), and the degradation data well fitted with the pseudo-first-order kinetics model. The enhanced photo-Fenton catalytic activity benefited from the Z-scheme heterojunctions of Fe-g-C3N4, which improved the separation ability of photo-generated charge carriers and increased the electrons that participated in Fe2+/Fe3+ cycle. The main active oxygen species of Fe-g-C3N4 were hydroxyl radicals, followed by superoxide radicals and electron holes. The effect of Fe-doping was revealed by density functional theory calculation. The excellent recyclability and stability of Fe-g-C3N4 catalyst was also observed. Such photo-Fenton system was also effective to degrade other organic pollutants. The findings reported here offer promising implications in developing the utilization of Fe-g-C3N4 composite in photo-Fenton system for treatment of wastewater.
关键词 ：
Density functional theory (DFT) Density functional theory (DFT) Fe doped g-C3N4 Fe doped g-C3N4 Photo-Fenton Photo-Fenton RhB RhB
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| GB/T 7714 | Ji, Siyang , Yang, Yanling , Zhou, Zhiwei et al. Photocatalysis-Fenton of Fe-doped g-C3N4 catalyst and its excellent degradation performance towards RhB [J]. | JOURNAL OF WATER PROCESS ENGINEERING , 2021 , 40 . |
| MLA | Ji, Siyang et al. "Photocatalysis-Fenton of Fe-doped g-C3N4 catalyst and its excellent degradation performance towards RhB" . | JOURNAL OF WATER PROCESS ENGINEERING 40 (2021) . |
| APA | Ji, Siyang , Yang, Yanling , Zhou, Zhiwei , Li, Xing , Liu, Yuankun . Photocatalysis-Fenton of Fe-doped g-C3N4 catalyst and its excellent degradation performance towards RhB . | JOURNAL OF WATER PROCESS ENGINEERING , 2021 , 40 . |
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摘要 ：
Effective regeneration of powdered activated carbon (PAC) is the key to reduce the operating cost of the PAC in wastewater treatment processes. In this study, volatile acetone and semi-volatile aniline were selected to investigate the regeneration characteristics of ultrasonically enhanced low-temperature thermal process. The results showed that the regeneration efficiency of the PAC that had adsorbed aniline or acetone increased with the increase in ultrasonic power, and optimal value of frequency and regeneration times were determined. The concentration and properties of organic solvents had a significant influence on the ultrasonic regeneration process. With the increase in heating temperature and regeneration time, the regeneration efficiency increased, but the loss of mass of the saturated PAC increased noticeably. With the combination of ultrasonic treatment in a solvent with low temperature heating, the PAC regeneration efficiency was successfully improved, and the PAC mass loss rate was noticeably reduced. The microjet, shock wave, and cavitation effects produced by ultrasonic treatment restored the specific surface area of the PAC, expanded its mesopore volume, and increased the pore diameter. A reasonable selection of the regeneration solution and optimization of the ultrasonic treatment conditions could create favorable conditions for subsequent low temperature thermal regeneration.
关键词 ：
low-temperature thermal regeneration low-temperature thermal regeneration powdered activated carbon powdered activated carbon ultrasound ultrasound volatile and semi-volatile organic pollutant volatile and semi-volatile organic pollutant
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| GB/T 7714 | Zheng, Dan , Zhou, Zhiwei , Yu, Rui et al. Characteristics of Ultrasonically Enhanced Low-Temperature Thermal Regeneration of Powdered Activated Carbon: A Case Study of Acetone and Aniline [J]. | WATER , 2021 , 13 (9) . |
| MLA | Zheng, Dan et al. "Characteristics of Ultrasonically Enhanced Low-Temperature Thermal Regeneration of Powdered Activated Carbon: A Case Study of Acetone and Aniline" . | WATER 13 . 9 (2021) . |
| APA | Zheng, Dan , Zhou, Zhiwei , Yu, Rui , Wang, Menghu . Characteristics of Ultrasonically Enhanced Low-Temperature Thermal Regeneration of Powdered Activated Carbon: A Case Study of Acetone and Aniline . | WATER , 2021 , 13 (9) . |
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摘要 ：
Despite the rapid increase of ultrafiltration (UF) membranes in water treatment, the UF performance in largescale drinking water treatment plants (DWTPs) in long-term operation has not been well understood. This study was carried out to investigate the fouling evolution of two types of polyvinyl chloride (PVC) hollow fiber UF membranes in a hybrid coagulation/short-length sedimentation/UF process. Water quality analysis showed that safe drinking water could be produced in the life time (i.e., 5 years) of the UF membranes. The fractions with large molecular weight (e.g., biopolymers), microbial by-product and aromatic protein II in raw water were easily removed, and the formation potentials of most disinfection by-products except trihalomethanes were found to decrease in the DWTP. Constant filtration fluxes were maintained for both types of UF membranes, while PVC composite membranes exhibited higher anti-fouling properties than PVC alloy membranes. The key fouling factors varied with operation time, and the top three factors were hydraulically cleaning efficiency, temperature and chemical oxygen demand using statistical analyses. Finally, the evolution model of membrane fouling in the first 5-year with potential fouling factors was established using artificial neural network, and membrane fouling of another year was predicted after UF membranes were replaced with new ones.
关键词 ：
Fouling prediction Fouling prediction Polyvinyl chloride membranes Polyvinyl chloride membranes Short-length sedimentation Short-length sedimentation Statistical analysis Statistical analysis Ultrafiltration Ultrafiltration
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| GB/T 7714 | Yu, Haikuan , Chang, Haiqing , Li, Xing et al. Long-term fouling evolution of polyvinyl chloride ultrafiltration membranes in a hybrid short-length sedimentation/ ultrafiltration process for drinking water production [J]. | JOURNAL OF MEMBRANE SCIENCE , 2021 , 630 . |
| MLA | Yu, Haikuan et al. "Long-term fouling evolution of polyvinyl chloride ultrafiltration membranes in a hybrid short-length sedimentation/ ultrafiltration process for drinking water production" . | JOURNAL OF MEMBRANE SCIENCE 630 (2021) . |
| APA | Yu, Haikuan , Chang, Haiqing , Li, Xing , Zhou, Zhiwei , Song, Wuchang , Ji, Hongjie et al. Long-term fouling evolution of polyvinyl chloride ultrafiltration membranes in a hybrid short-length sedimentation/ ultrafiltration process for drinking water production . | JOURNAL OF MEMBRANE SCIENCE , 2021 , 630 . |
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摘要 ：
As a key parameter in the adsorption process, removal rate is not available under most operating conditions due to the time and cost of experimental testing. To address this issue, evaluation of the efficiency of NH4+ removal from stormwater by coal-based granular activated carbon (CB-GAC), a novel approach, the response surface methodology (RSM), back-propagation artificial neural network (BP-ANN) coupled with genetic algorithm (GA), has been applied in this research. The sorption process was modeled based on Box-Behnben design (BBD) RSM method for independent variables: Contact time, initial concentration, temperature, and pH; suggesting a quadratic polynomial model with p-value 2 = 0.9762. The BP-ANN with a structure of 4-8-1 gave the best performance. Compared with the BBD-RSM model, the BP-ANN model indicated better prediction of the response with R2 = 0.9959. The weights derived from BP-ANN was further analyzed by Garson equation, and the results showed that the order of the variables’ effectiveness is as follow: Contact time (31.23%) > pH (24.68%) > temperature (22.93%) > initial concentration (21.16%). The process parameters were optimized via RSM optimization tools and GA. The results of validation experiments showed that the optimization results of GA-ANN are more accurate than BBD-RSM, with contact time = 899.41 min, initial concentration = 17.35 mg/L, temperature = 15 °C, pH = 6.98, NH4+ removal rate = 63.74%, and relative error = 0.87%. Furthermore, the CB-GAC has been characterized by Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET). The isotherm and kinetic studies of the adsorption process illustrated that adsorption of NH4+ onto CB-GAC corresponded Langmuir isotherm and pseudo-second-order kinetic models. The calculated maximum adsorption capacity was 0.2821 mg/g. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
关键词 ：
Activated carbon Activated carbon Adsorption Adsorption Backpropagation Backpropagation Genetic algorithms Genetic algorithms Granular materials Granular materials Isotherms Isotherms Kinetic theory Kinetic theory Neural networks Neural networks Scanning electron microscopy Scanning electron microscopy Storms Storms
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| GB/T 7714 | Yu, Aixin , Liu, Yuankun , Li, Xing et al. Modeling and optimizing of NH4+ removal from stormwater by coal-based granular activated carbon using RSM and ANN coupled with GA [J]. | Water (Switzerland) , 2021 , 13 (5) . |
| MLA | Yu, Aixin et al. "Modeling and optimizing of NH4+ removal from stormwater by coal-based granular activated carbon using RSM and ANN coupled with GA" . | Water (Switzerland) 13 . 5 (2021) . |
| APA | Yu, Aixin , Liu, Yuankun , Li, Xing , Yang, Yanling , Zhou, Zhiwei , Liu, Hongrun . Modeling and optimizing of NH4+ removal from stormwater by coal-based granular activated carbon using RSM and ANN coupled with GA . | Water (Switzerland) , 2021 , 13 (5) . |
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摘要 ：
Silver-loaded stainless steel (Ag-SS) was applied in domestic hot water system (DHWS) to control the biofilm contamination. The antibacterial properties of Ag-SS, as well as the bacterial communities, potential pathogens and antibiotic resistance genes (ARGs) of pipe wall biofilm were investigated, with SS as control. Ag-SS main-tained a high antibacterial efficiency on heterotrophic bacteria (70.60 ? 13.22 %) and Escherichia coli (73.56 ? 10.62 %) by contact bacteriostasis. Dominant phyla exhibited a lower relative abundance in Ag-SS than SS. The bacteria were further classified into abundant (? 1 %), moderately abundant (0.1-1 %) and rare (? 0.1 %) taxa to investigate their responses to silver. There were 15.33 % of shared operational taxonomic units (OTUs) belonged to abundant taxa, while most unique OTUs (> 80 %) of each sample were identified as rare taxa. As the primary abundant genera, Mesorhizobium and Bradyrhizobium exhibited resistant and sensitive to silver, respectively. Most dominant moderately abundant and rare genera were resistant to silver. Moreover, among 19 detected potential pathogens, Legionella, Parachlamydia and Aeromonas were sensitive to silver, while Pseudo-monas and Acinetobacter were resistant to silver. Furthermore, a total of 48 ARGs were detected and they exhibited similar distributions in both samples. The total abundance of ARGs in Ag-SS increased by 0.08 fold compared with that in SS, with efflux pumps as the main resistance mechanisms. This study highlights the different responses of abundant, moderately abundant and rare taxa to silver, and the occurrences of ARGs, confirming that Ag-SS was an effective disinfection strategy for biosafety protection of DHWS.
关键词 ：
Abundant and rare taxa Abundant and rare taxa Antibacterial efficiency Antibacterial efficiency Antibiotic resistance genes Antibiotic resistance genes Pipe wall biofilm Pipe wall biofilm Silver-loaded stainless steel Silver-loaded stainless steel
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| GB/T 7714 | Li, Na , Li, Xing , Shi, Zhi-Yuan et al. Bacterial communities, potential pathogens and antibiotic resistance genes of silver-loaded stainless steel pipe wall biofilm in domestic hot water system [J]. | JOURNAL OF WATER PROCESS ENGINEERING , 2021 , 40 . |
| MLA | Li, Na et al. "Bacterial communities, potential pathogens and antibiotic resistance genes of silver-loaded stainless steel pipe wall biofilm in domestic hot water system" . | JOURNAL OF WATER PROCESS ENGINEERING 40 (2021) . |
| APA | Li, Na , Li, Xing , Shi, Zhi-Yuan , Fan, Xiao-Yan , Zhou, Zhi-Wei . Bacterial communities, potential pathogens and antibiotic resistance genes of silver-loaded stainless steel pipe wall biofilm in domestic hot water system . | JOURNAL OF WATER PROCESS ENGINEERING , 2021 , 40 . |
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摘要 ：
一种多功能耦合的PAC/Bi2O3/TiO2复合材料制备方法，属水处理领域。将钛酸四丁酯和冰醋酸缓慢加入无水乙醇中得A液，五水硝酸铋充分溶于去离子水中得B液，B液逐滴加入A液后形成溶胶；溶胶中加入粉末活性炭浸渍5～8h；浸渍后的溶胶移入水热反应釜，水热反应12～18h后取出倒入蒸发舟，在烘箱干燥后研磨成粉末；粉末置于管式炉中，在空气氛围下300℃热处理2h，在氮气或氩气氛围下500℃～750℃热处理3h。本发明公开方法所制备的复合材料，能够有效减少PAC质量损耗，在可见光催化氧化持续降解污染物的同时，实现PAC动态的非饱和吸附与原位再生，同步完成污染物吸附、可见光催化氧化和原位再生的耦合作用。
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| GB/T 7714 | 李星 , 庄小璇 , 杨艳玲 et al. 一种多功能耦合的PAC/Bi2O3/TiO2复合材料制备方法 : CN202010038894.9[P]. | 2020-01-14 . |
| MLA | 李星 et al. "一种多功能耦合的PAC/Bi2O3/TiO2复合材料制备方法" : CN202010038894.9. | 2020-01-14 . |
| APA | 李星 , 庄小璇 , 杨艳玲 , 周志伟 , 王男 , 商翌 . 一种多功能耦合的PAC/Bi2O3/TiO2复合材料制备方法 : CN202010038894.9. | 2020-01-14 . |
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