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Feasibility and simulation model of a pilot scale membrane bioreactor for wastewater treatment and reuse from Chinese traditional medicine 被引量:4
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作者 REN Nan-qi YAN Xian-feng +3 位作者 CHEN Zhao-bo HU Dong-xue GONG Man-li GUO Wan-qian 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2007年第2期129-134,共6页
The lack and pollution of water resource make wastewater reuse necessary. The pilot scale long-term tests for submerged membrane bioreactor were conducted to treat the effluents of anaerobic or aerobic treatment proce... The lack and pollution of water resource make wastewater reuse necessary. The pilot scale long-term tests for submerged membrane bioreactor were conducted to treat the effluents of anaerobic or aerobic treatment process for the high-strength Chinese traditional medicine wastewater. This article was focused on the feasibility of the wastewater treatment and reuse at shorter hydraulic retention time (HRT) of 5.0, 3.2 and 2.13 h. MLSS growth, membrane flux, vacuum values and chemical cleaning periods were also investigated. The experimental results of treating two-phase anaerobic treatment effluent demonstrated that the CODfilt was less than 100 mg/L when the influent COD was between 500-10000 mg/L at HRT of 5.0 h, which could satisfy the normal discharged standard in China. The experimental results to treat cross flow aerobic reactor effluent demonstrated that the average value of CODfilt was 17.28 mg/L when the average value of influent COD was 192.84 mg/L at HRT of 2.13 h during 106 d, which could completely meet the normal standard for water reuse. The maximum MLSS and MLVSS reached 24000 and 14500 mg/L at HRT of 3.2 h respectively. Membrane flux had maximal resume degrees of 94.7% at vacuum value of 0.02 MPa after cleaning. Chemical cleaning periods of membrane module were 150 d. A simulation model of operational parameters was also established based on the theory of back propagation neural network and linear regression of traditional mathematical model. The simulation model showed that the optimum operational parameters were suggested as follows: HRT was 5.0 h, SRT was 100 d, the range of COD loading rate was between 10.664-20.451 kg/(m3.d), the range of MLSS was between 7543-13694 mg/L. 展开更多
关键词 submerged membrane bioreactor (SMBR) Chinese traditional medicine wastewater hydraulic retention time (HRT) simulation model pilot scale test
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Simulation and analysis of wastewater stabilization Pond system
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作者 Wen Xianghua(Research Center for Eco-Environmental Sciences. Chinese Academy of Sciences, Beijing 100085, China)Qian Yi Gu Xiasheng(Department of Environmental Engineering,Tsinghua Univeisity. Beijing 100084, China) 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1994年第1期42-51,共10页
in this study, an ecological model established by the authors is used to simulate the ge-neral operation characteristics of wastewater stabilization pond system. Some conclusions are useful for understanding the mech... in this study, an ecological model established by the authors is used to simulate the ge-neral operation characteristics of wastewater stabilization pond system. Some conclusions are useful for understanding the mechanisms of stabilization pond. and the design and operation of the pond system. 展开更多
关键词 ecological model simulATION wastewater stabilization pond.
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Simulation of Low TDS and Biological Units of Fajr Industrial Wastewater Treatment Plant Using Artificial Neural Network and Principal Component Analysis Hybrid Method
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作者 Naser Mehrdadi Hamed Hasanlou +2 位作者 Mohammad Taghi Jafarzadeh Hamidreza Hasanlou Hamid Abdolabadi 《Journal of Water Resource and Protection》 2012年第6期370-376,共7页
Being familiar with characteristics of industrial town effluents from various wastewater treatment units, which have high qualitative and quantitative variations and more uncertainties compared to urban wastewaters, p... Being familiar with characteristics of industrial town effluents from various wastewater treatment units, which have high qualitative and quantitative variations and more uncertainties compared to urban wastewaters, plays very effective role in governing them. With regard to environmental issues, proper operation of wastewater treatment plants is of par- ticular importance that in the case of inappropriate utilization, they will cause serious problems. Processes that exist in environmental systems mostly have two major characteristics: they are dependent on many variables;and there are complex relationships between its components which make them very difficult to analyze. In order to achieve a better and efficient control over the operation of an industrial wastewater treatment plant (WWTP), powerful mathematical tool can be used that is based on recorded data from some basic parameters of wastewater during a period of treatment plant operation. In this study, the treatment plant was divided into two main subsystems including: Low TDS (Total Dissolved Solids) treatment unit and Biological unit (extended aeration). The multilayer perceptron feed forward neural network with a hidden layer and stop training method was used to predict quality parameters of the industrial effluent. Data of this study are related to the Fajr Industrial Wastewater Treatment Plant, located in Mahshahr—Iran that qualita- tive and quantitative characteristics of its units were used for training, calibration and validation of the neural model. Also, Principal Component Analysis (PCA) technique was applied to improve performance of generated models of neural networks. The results of L-TDS unit showed good accuracy of the models in estimating qualitative profile of wastewater but results of biological unit did not have sufficient accuracy to being used. This model facilitates evaluating the performance of each treatment plant units through comparing the results of prediction model with the standard amount of outputs. 展开更多
关键词 Fajr Industrial wastewater Treatment Plant simulATION Artificial Neural Network PCA LOW TDS BIOLOGICAL Unit
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Design and Comparison of Wastewater Treatment Plant Types (Activated Sludge and Membrane Bioreactor), Using GPS-X Simulation Program: Case Study of Tikrit WWTP (Middle Iraq)
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作者 Alaa Uldeen Athil Arif Mohamed Tarek Sorour Samia Ahmed Aly 《Journal of Environmental Protection》 2018年第6期636-651,共16页
Mathematical models and simulation are considered a powerful tool in engineering practice. Those tools are becoming increasingly used for the improvement of wastewater treatment plants design because the conceptual de... Mathematical models and simulation are considered a powerful tool in engineering practice. Those tools are becoming increasingly used for the improvement of wastewater treatment plants design because the conceptual design is complex and ill-defined. In this paper, three alternatives: 1) complete mix activated sludge without nitrogen removal (CAS);2) complete mix activated sludge with nitrogen removal (CAS-N) and;3) membrane bioreactor (MBR) processes were designed into two steps: first concept design to calculate the size of process units, then second implement modeling and simulation to improve the accuracy of the conceptual design. In brief, the treatment process design has been verified by using the activated sludge model No. 1 (ASM1) in GPS-X (v.7) simulation software. This application helps not only in sizing the treatment units but also in understanding the plant’s capacity. In the same time, it can assist in studying the future expansion works required for increased hydraulic and organic loadings. For this purpose, Tikrit WWTP was selected as a case study. The used model was validated by comparing the designed values of the plant and the modeling data. The verification of the obtained results from both hand calculations and the results of the program showed a good agreement. A significant difference in the volume of secondary treatment was obtained from design calculations, where the CAS without denitrification system was 9244 m3 (aerobic and secondary tanks), CAS with denitrification system was 11,324 m3 (anoxic, aerobic and secondary tanks) and for MBR system was 7468 m3 (anoxic, aerobic and immersed membrane tanks). From the obtained results point of view, it can be concluded that mathematical models can be considered as worthy tools to complement the established wastewater treatment plant design procedures. 展开更多
关键词 Activated Sludge Membrane Bioreactor wastewater TREATMENT wastewater TREATMENT Plant DESIGN Modeling and simulation
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Hydrodynamics research of wastewater treatment bioreactors
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作者 任南琪 张冰 周雪飞 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2009年第3期309-317,共9页
To optimize the design and improve the performance of wastewater treatment bioreactors,the review concerning the hydrodynamics explored by theoretical equations,process experiments,modeling of the hydrodynamics and fl... To optimize the design and improve the performance of wastewater treatment bioreactors,the review concerning the hydrodynamics explored by theoretical equations,process experiments,modeling of the hydrodynamics and flow field measurement is presented. Results of different kinds of experiments show that the hydrodynamic characteristics can affect sludge characteristics,mass transfer and reactor performance significantly. Along with the development of theoretical equations,turbulence models including large eddy simulation models and Reynolds-averaged Navier-Stokes (RANS) models are widely used at present. Standard and modified k-ε models are the most widely used eddy viscosity turbulence models for simulating flows in bioreactors. Numerical simulation of hydrodynamics is proved to be efficient for optimizing design and operation. The development of measurement techniques with high accuracy and low intrusion enables the flow filed in the bioreactors to be transparent. Integration of both numerical simulation and experimental measurement can describe the hydrodynamics very well. 展开更多
关键词 wastewater treatment BIOREACTOR HYDRODYNAMICS simulATION measurement technique
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用Matlab/Simulink建立废水处理仿真模型 被引量:4
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作者 刘大伟 沈文浩 《环境科学与技术》 CAS CSCD 北大核心 2007年第11期86-89,共4页
国际水质协会(IWA)和欧盟科学技术合作组织(COST)合作开发的活性污泥废水处理基准仿真模型BSM1(benchmark sim-ulation model NO.1),主要目的是为了建立一个活性污泥过程控制方案的开发平台。文章比较详细的介绍了如何用Matlab和Simulin... 国际水质协会(IWA)和欧盟科学技术合作组织(COST)合作开发的活性污泥废水处理基准仿真模型BSM1(benchmark sim-ulation model NO.1),主要目的是为了建立一个活性污泥过程控制方案的开发平台。文章比较详细的介绍了如何用Matlab和Simulink建立BSM1,对于如何得到正确的开环仿真结果给出了详细的说明,并将两种建模方式在仿真结果、仿真速度、建模的难易程度等方面进行了比较。 展开更多
关键词 废水处理 模型 仿真 活性污泥
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Simulation of sludge blanket height in clarifiers
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作者 周振 吴志超 +1 位作者 王志伟 顾国维 《Journal of Shanghai University(English Edition)》 CAS 2009年第4期287-291,共5页
Sludge blanket height (SBH) is an important parameter in the clarifier design, operation and control. Based on an overview and classification of SBH algorithms, a modified SBH algorithm is proposed by incorporating ... Sludge blanket height (SBH) is an important parameter in the clarifier design, operation and control. Based on an overview and classification of SBH algorithms, a modified SBH algorithm is proposed by incorporating a threshold concentration limit into a relative concentration sharp change algorithm to eliminate the disturbance of compression interfaces on the correct simulation of SBH. Pilot-scale test data are adopted to compare reliability of three SBH algorithms reported in literature and the modified SBH algorithm developed in this paper. Calculated results demonstrate that the three SBH algorithms give results with large deviation (〉 50%) from measured SBH, especially under low solid flux conditions. The modified algorithm is computationally efficient and reliable in matching the measured data. It is incorporated into a one- dimensional clarifier model for stable simulation of pilot-scale experimental clarifier data and into dynamic simulation of a full-scale wastewater treatment plant (WWTP) clarifier data. 展开更多
关键词 CLARIFIER sludge blanket height (SBH) simulATION wastewater treatment
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进水底物对好氧颗粒污泥特性及微生物群落的影响
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作者 郝桂珍 赵勇 +3 位作者 陆江锋 王佳伟 李振河 徐利 《水处理技术》 CAS CSCD 北大核心 2024年第4期91-97,共7页
为了研究进水底物对好氧颗粒污泥(AGS)特性的影响,通过接种絮状污泥于序批式反应器(SBR)中以生活污水和模拟生活污水作为进水底物,对AGS形成过程中的污泥特性和微生物群落展开研究。研究表明:以模拟生活污水为进水底物,发现颗粒污泥内... 为了研究进水底物对好氧颗粒污泥(AGS)特性的影响,通过接种絮状污泥于序批式反应器(SBR)中以生活污水和模拟生活污水作为进水底物,对AGS形成过程中的污泥特性和微生物群落展开研究。研究表明:以模拟生活污水为进水底物,发现颗粒污泥内部以丝状菌为框架,通过对污泥的截留逐渐形成AGS,污泥沉降性能良好。随着AGS的形成胞外聚合物(EPS)组分中蛋白质(PN)含量增加显著,PN/PS由1.77上升至5.80,促进了AGS的形成和稳定性,且EPS含量与Zeta电位、污泥沉降指数呈负相关。连续投加Fe(OH)_(3)胶体抑制了NOB菌的活性,导致生活污水阶段污染物的去除效果较差;AGS形成后污染物的去除效果明显上升,特别是氮、磷污染物。生活污水阶段Candidatus_Microthrix菌属引起了系统内丝状菌膨胀,同时微生物群落丰富度、多样性逐渐降低。模拟生活污水阶段具有疏水性和分泌EPS功能的菌属丰度占比持续上升,例如:unclassified_o__Saccharimonadale(33.%→22.0%)、Zoogloea(3.0%→6.0%)、unclassified_f__Sphingomonadaceae(0.87%→3.1%)菌属等;促进了污泥颗粒化;同时随着污泥颗粒化程度提高,具有反硝化和除磷功能的菌属丰度占比持续上升,保证了AGS系统高效的脱氮除磷性能。 展开更多
关键词 好氧颗粒污泥 生活污水 模拟生活污水 微生物群落
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曝气强化三维电极对含油废水水-油微界面破乳机制研究
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作者 王冰 潘海丰 +1 位作者 刘光洲 姚萌 《水处理技术》 CAS CSCD 北大核心 2024年第8期28-32,共5页
三维电极体系下曝气对含油废水破乳除油效果有着显著性增强。本研究采用新型三相三维电级工艺,通过正交实验优化曝气条件,深入探讨强化水-油微界面破乳过程的控制机制。实验结果表明,曝气量由2.0 L/min降低到1.5 L/min,此时的COD和含油... 三维电极体系下曝气对含油废水破乳除油效果有着显著性增强。本研究采用新型三相三维电级工艺,通过正交实验优化曝气条件,深入探讨强化水-油微界面破乳过程的控制机制。实验结果表明,曝气量由2.0 L/min降低到1.5 L/min,此时的COD和含油量分别为107、1.35 mg/L,满足回注水标准,且明显提高了节能效率。将曝气条件加入数值模拟,利用COMSOL软件模拟乳化油滴破乳及聚集的过程。在电场和气场力的共同作用下,增加了油滴拉伸变形的程度,破坏水-油微界面膜的机械强度,加速油滴脱稳过程,进而快速发生团聚。这一研究对强化电化学处理含油废水,具有重大的指导意义。 展开更多
关键词 水-油微界面 含油废水 曝气强度 仿真模拟
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烟气余热蒸发处理锅炉脱硫废水技术的开发及应用
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作者 顾黎东 郑建伟 +1 位作者 鹿志勇 翁卫国 《安全、健康和环境》 2024年第9期24-29,共6页
针对炼化企业污水“近零”排放难以消纳高盐高氨氮脱硫废水的问题,研发利用锅炉烟气余热在烟道直接蒸发脱硫废水的流态模型,开展废水液滴粒径、雾化角度、烟速、烟温等变量对液滴完全蒸发时间、蒸发距离的数值模拟研究和小试实验,完成... 针对炼化企业污水“近零”排放难以消纳高盐高氨氮脱硫废水的问题,研发利用锅炉烟气余热在烟道直接蒸发脱硫废水的流态模型,开展废水液滴粒径、雾化角度、烟速、烟温等变量对液滴完全蒸发时间、蒸发距离的数值模拟研究和小试实验,完成烟道蒸发室的工业结构设计,并经过2个阶段的废水工业化试运行,验证了该技术的合理性和可行性。对试运行过程中出现的问题进行了客观的分析评价,提出了必要的整改措施,开创了脱硫废水低成本、低能耗环保处理的新途径。 展开更多
关键词 脱硫废水 烟气余热 锅炉烟道 直接蒸发 技术研究 数值模拟
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正弦交流电絮凝处理含锌电镀废水的研究 被引量:2
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作者 周益辉 易师 +1 位作者 雷细平 徐涛 《电镀与涂饰》 CAS 北大核心 2024年第1期136-143,共8页
[目的]电镀废水中的Zn^(2+)污染控制是当前重要的工业水环境技术问题。[方法]采用正弦交流电絮凝技术和自制的电絮凝装置从废水中除去Zn^(2+)。采用数值模拟的研究方法对电絮凝装置进行了流场分析,并通过实验研究了溶液初始pH、电流密... [目的]电镀废水中的Zn^(2+)污染控制是当前重要的工业水环境技术问题。[方法]采用正弦交流电絮凝技术和自制的电絮凝装置从废水中除去Zn^(2+)。采用数值模拟的研究方法对电絮凝装置进行了流场分析,并通过实验研究了溶液初始pH、电流密度、初始锌离子浓度、反应时间等因素对去除Zn^(2+)的影响,使用响应面优化方案的Box-Behnken设计获得Zn^(2+)最高去除效率的最佳工艺参数。[结果]钛篮孔板大于3层有利于实现电絮凝装置流场均匀分布;在pH=9、含120 mg/dm^(3)Zn^(2+)的模拟废水溶液中,施加电流密度为0.31 A/m2、频率为50 Hz正弦交流电,通电21.3 min,Zn^(2+)的去除率可达到98.80%。[结论]响应面优化可用于正弦交流电絮凝处理含Zn^(2+)废水的过程。 展开更多
关键词 含锌电镀废水 正弦交流电絮凝 响应面优化 装置 数值模拟
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PAC/PDM复合混凝剂对模拟印染废水混凝脱色效果研究 被引量:1
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作者 商高锋 赵晓蕾 张跃军 《当代化工研究》 CAS 2024年第11期62-65,共4页
采用混凝烧杯实验,以脱色率和CODMn去除率为指标,研究特征黏度(0.63 dL/g、1.53 dL/g、2.63 dL/g)及复配比例(15:1、10:1、5:1)系列化的复合混凝剂PAC/PDM对模拟印染废水的混凝脱色效果和机理。结果表明,PAC/PDM具有良好的混凝脱色效果... 采用混凝烧杯实验,以脱色率和CODMn去除率为指标,研究特征黏度(0.63 dL/g、1.53 dL/g、2.63 dL/g)及复配比例(15:1、10:1、5:1)系列化的复合混凝剂PAC/PDM对模拟印染废水的混凝脱色效果和机理。结果表明,PAC/PDM具有良好的混凝脱色效果。其中,PAC/PDM(2.63/10:1)对活性红、活性蓝的混凝脱色效果最好,其最佳脱色率分别为98.67%、90.83%,最佳CODMn去除率分别为86.44%、80.79%;PAC/PDM(0.63/15:1)对分散红、分散深蓝的混凝脱色效果最好,其最佳脱色率分别为99.30%、99.18%,最佳CODMn去除率分别为86.49%、86.41%。结合Zeta电位测定及絮团形貌观察,PAC/PDM处理模拟印染废水的混凝机理主要是电中和吸附架桥。 展开更多
关键词 PAC/PDM 复合混凝剂 模拟印染废水 混凝脱色 混凝机理
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合流制大型污水处理厂全流程工艺建模模拟实践 被引量:1
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作者 祝嘉禄 白海梅 夏四清 《净水技术》 CAS 2024年第S01期184-191,共8页
研究以设计规模为80万t的竹园一厂、二厂提标改造(升级补量)工程为建模对象,在污水处理模拟软件WEST中建立了包含深度处理的污水处理厂全流程处理工艺模型,并用蒙特卡洛模拟法对模型参数进行校准。模拟结果表明,模型能较好地模拟污水处... 研究以设计规模为80万t的竹园一厂、二厂提标改造(升级补量)工程为建模对象,在污水处理模拟软件WEST中建立了包含深度处理的污水处理厂全流程处理工艺模型,并用蒙特卡洛模拟法对模型参数进行校准。模拟结果表明,模型能较好地模拟污水处理厂的出水水质以及内外回流污泥浓度,总体相对误差<20%。研究所采用的建模过程、模型及参数校准方法能为同类型污水处理厂的建模模拟提供技术参考。 展开更多
关键词 污水处理建模 蒙特卡洛模拟 模型校准 模型验证 拉丁超立方抽样 全流程工艺模拟
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曝气式增湿除湿蒸发工艺处理高盐废水的模拟分析与优化
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作者 陈群云 于幸娟 吴志根 《水处理技术》 CAS CSCD 北大核心 2024年第2期31-37,共7页
高盐废水在废水中属于极难处理的一类,对环境危害极大。为了高效处理高盐废水,设计了一种直接接触的曝气式增湿除湿蒸发工艺,并利用Aspen Plus软件对该工艺进行模拟。通过实验验证发现模拟数据与实验数据的最大偏差不超过10%,确立了模... 高盐废水在废水中属于极难处理的一类,对环境危害极大。为了高效处理高盐废水,设计了一种直接接触的曝气式增湿除湿蒸发工艺,并利用Aspen Plus软件对该工艺进行模拟。通过实验验证发现模拟数据与实验数据的最大偏差不超过10%,确立了模型的可靠性及模拟结果的正确性。为降低曝气式增湿除湿蒸发工艺的能耗,对曝气式增湿除湿蒸发工艺进行多工况模拟。结果表明,蒸发速率随溶液温度的升高呈指数型增长,随盐度的增大而减少。冷凝效率随冷凝温度的升高而降低,随初始内部冷却水量的升高而升高。增湿除湿系统造水比随着溶液温度和冷凝温度的增大呈现先增大后减小的趋势,能量消耗比则呈现先减小后增大的趋势,最大造水比为1.79,最小能量消耗比为0.77。根据造水比和能量消耗比得出系统最佳工作范围:溶液温度为60~80℃,冷凝温度为20~40℃。 展开更多
关键词 高盐废水 增湿除湿 Aspen Plus 模拟
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基于反应工程法的脱硫废水液滴蒸发特性数值研究
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作者 赵亮 李令刚 +4 位作者 张娟 李昂 陈嘉玮 潘丹萍 杨林军 《动力工程学报》 CAS CSCD 北大核心 2024年第10期1647-1655,共9页
采用数值模拟方法研究了干燥塔进口烟气温度、进口烟气流量、塔径对某燃煤电厂脱硫废水旋转喷雾蒸发设备中液滴蒸发特性的影响。为完善液滴蒸发传热传质模型,使用反应工程法(REA)中的液滴表观活化能函数描述液滴的传热传质过程,并将其... 采用数值模拟方法研究了干燥塔进口烟气温度、进口烟气流量、塔径对某燃煤电厂脱硫废水旋转喷雾蒸发设备中液滴蒸发特性的影响。为完善液滴蒸发传热传质模型,使用反应工程法(REA)中的液滴表观活化能函数描述液滴的传热传质过程,并将其编译到离散相计算过程中。结果表明:提高进口烟气温度与进口烟气流量,可缩短液滴的蒸发停留时间和竖直蒸发距离;增大干燥塔塔径可延长高温烟气在塔内的停留时间,增大旋流强度,进而加快液滴的换热蒸发过程。 展开更多
关键词 脱硫废水 液滴蒸发 旋转喷雾 反应工程法 数值模拟
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响应面优化超高石灰铝工艺去除高氯废水中的氯离子
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作者 段越 罗学刚 《湖北农业科学》 2024年第2期232-239,共8页
以工业生产产生的高氯废水为试验对象,采用超高石灰铝(UHLA)工艺去除高氯废水中的氯离子(Cl^(-)),根据单因素结果,以Cl^(-)去除率为响应值,采用Box-Behnken中心组合试验优化工艺参数。结果表明,钙氯摩尔比对Cl^(-)去除率有极显著的影响... 以工业生产产生的高氯废水为试验对象,采用超高石灰铝(UHLA)工艺去除高氯废水中的氯离子(Cl^(-)),根据单因素结果,以Cl^(-)去除率为响应值,采用Box-Behnken中心组合试验优化工艺参数。结果表明,钙氯摩尔比对Cl^(-)去除率有极显著的影响,温度对Cl^(-)去除率具有显著影响,而铝氯摩尔比对Cl^(-)去除率无显著影响,影响程度由大到小依次为钙氯摩尔比、温度、铝氯摩尔比;UHLA工艺去除高氯废水中Cl^(-)的最佳工艺参数为n(Ca)∶n(Al)∶n(Cl)=5.4∶2.9∶1.0,反应温度为25.5℃,理论的Cl^(-)去除率可达90.56%;采用模拟废水对最优工艺进行横向验证,模拟废水中Cl^(-)去除率为97.85%,显著高于工业高氯废水;采用ICP-MS分析UHLA工艺处理前后高氯废水中的元素变化,发现UHLA工艺能有效去除阴离子如SO_(4)^(2-)、SO_(3)^(2-)、I^(-)等及重金属离子如Sr^(2+)、Cr^(3+)、Zn^(2+)等。 展开更多
关键词 氯离子 高氯废水 模拟废水 UHLA工艺 响应面
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基于混合胺的PVDF复合疏松纳滤膜及其在染料废水处理中的应用
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作者 陈淑怡 张晨 +1 位作者 张琪 王军 《广东化工》 CAS 2024年第20期20-23,共4页
为了对染料废水中的染料和盐进行有效的分离、促进染料的回收利用,文章探讨了在共沉积与界面聚合组合法制备PVDF复合疏松纳滤膜过程中,GAZ/PEI对PVDF复合疏松纳滤膜选择层的微观结构、表面粗糙度、过滤性能及其在模拟活性黑5(RB5)染料... 为了对染料废水中的染料和盐进行有效的分离、促进染料的回收利用,文章探讨了在共沉积与界面聚合组合法制备PVDF复合疏松纳滤膜过程中,GAZ/PEI对PVDF复合疏松纳滤膜选择层的微观结构、表面粗糙度、过滤性能及其在模拟活性黑5(RB5)染料废水处理中的应用等情况的影响。研究结果表明随着GAZ/PEI的增加,PVDF复合疏松纳滤膜表面结节减小,选择层厚度降低,表面粗糙度减小,纯水通量增大,PEG800截留率降低,染料废水通量增大,GAZ/PEI为9/91时,膜性能最佳,此时纯水通量和染料溶液通量较单一胺分别提高了91.6%和109.1%,RB5和NaCl的截留率分别为94.3%和2.1%,在运行时间内,基于混合胺的PVDF复合疏松纳滤膜体现了较好的运行稳定性。 展开更多
关键词 PVDF复合疏松纳滤膜 混合胺 共沉积与界面聚合组合法 RB5模拟染料废水
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气隙式膜蒸馏技术研究现状和应用
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作者 杜永亮 梁卓彬 +3 位作者 龚耀煦 毕豪杰 徐志远 苑宏英 《化工进展》 EI CAS CSCD 北大核心 2024年第4期1655-1666,共12页
在低碳经济的发展背景下,膜蒸馏技术作为一种兼具优异分离性能和节能潜力的新型分离技术而备受重视。气隙式膜蒸馏作为一种高热效率的膜蒸馏形式,其节能优势更为显著。本文总结了国内外与气隙式膜蒸馏技术相关的研究进展,从传质传热模... 在低碳经济的发展背景下,膜蒸馏技术作为一种兼具优异分离性能和节能潜力的新型分离技术而备受重视。气隙式膜蒸馏作为一种高热效率的膜蒸馏形式,其节能优势更为显著。本文总结了国内外与气隙式膜蒸馏技术相关的研究进展,从传质传热模型、数值模拟和膜组件结构几个方面指出了膜蒸馏技术的主要研究方向。重点介绍了膜蒸馏过程优化的研究和技术应用现状。膜蒸馏过程优化包括通过膜组件结构设计优化、使用改性膜、外加物理场等方式以提高膜通量或减小膜污染。在应用方面,气隙式膜蒸馏技术主要应用于海水淡化、高浓度工业废水处理和浓缩加工等领域。 展开更多
关键词 气隙式膜蒸馏 膜组件 膜分离 数值模拟 结构优化 废水处理
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石墨烯废水资源化利用系统的稳态模拟与应用 被引量:1
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作者 王新 庞欣 +3 位作者 戚绪亮 孙培军 陶非晗 邓凯 《广州化工》 CAS 2024年第10期115-118,共4页
建立了石墨烯废水资源化利用模拟系统,分析了效数、进料方式、操作条件对投资和运行费用的影响,优化了装置参数,采用逆流进料,预热温度为78℃的四效蒸发浓缩装置适用于石墨烯废水资源化利用的处置过程。将系统参数应用于废水处理工程的... 建立了石墨烯废水资源化利用模拟系统,分析了效数、进料方式、操作条件对投资和运行费用的影响,优化了装置参数,采用逆流进料,预热温度为78℃的四效蒸发浓缩装置适用于石墨烯废水资源化利用的处置过程。将系统参数应用于废水处理工程的建设,该稳态模拟系统适用于石墨烯废水资源化利用装置的建设和日常运行指导,对该类装置的建设和运行提供了参考经验。 展开更多
关键词 石墨烯废水 资源化利用 稳态模拟
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Catalytic ozonation in advanced treatment of kitchen wastewater:multi-scale simulation and pilot-scale study 被引量:1
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作者 Zuoyong Zhou Ni Yan +6 位作者 Mengxi Yin Tengfei Ren Shuning Chen Kechao Lu Xiaoxin Cao Xia Huang Xiaoyuan Zhang 《Frontiers of Environmental Science & Engineering》 SCIE EI CSCD 2023年第12期47-58,共12页
Catalytic ozonation is regarded as a promising technology in the advanced treatment of refractory organic wastewater.Packed-bed reactors are widely used in practical applications due to simple structures,installation ... Catalytic ozonation is regarded as a promising technology in the advanced treatment of refractory organic wastewater.Packed-bed reactors are widely used in practical applications due to simple structures,installation and operation.However,mass transfer of packed-bed reactors is relatively restrained and amplified deviations usually occurred in scale-up application.Herein,a multi-scale packed-bed model of catalytic ozonation was established to guide pilot tests.First,a laboratory-scale test was conducted to obtain kinetic parameters needed for modeling.Then,a multi-scale packed-bed model was developed to research the effects of water distribution structure,catalyst particle size,and hydraulic retention time(HRT)on catalytic ozonation.It was found that the performance of packed bed reactor was increased with evenly distributed water inlet,HRT of 60 min,and catalyst diameter of about 3-7 mm.Last,an optimized reactor was manufactured and a pilot-scale test was conducted to treat kitchen wastewater using catalytic ozonation process.In the pilot-scale test with an ozone dosage of 50 mg/L and HRT of 60 min,the packed-bed reactor filled with catalysts I was able to reduce chemical oxygen demand(COD)from 117 to 59 mg/L.The performance of the catalytic ozonation process in the packed-bed reactor for the advanced treatment of actual kitchen wastewater was investigated via both multi-scale simulation and pilot-scale tests in this study,which provided a practical method for optimizing the reactors of treating refractory organic wastewater. 展开更多
关键词 Catalytic ozonation Multi-scale simulation Pilot-scale study Kitchen wastewater
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