Journal of Water Reuse and Desalination最新文献_第6页

Effects of micro-flocculation pretreatment on the ultrafiltration membrane fouling caused by different dissolved organic matters in treated wastewater 微絮凝预处理对超滤膜不同溶解有机物污染的影响

IF 2.3

Journal of Water Reuse and Desalination Pub Date : 2021-09-24 DOI: 10.2166/wrd.2021.051

Lan-Yang Ren, Chen Liu, Ting Meng, Yingxue Sun

{"title":"Effects of micro-flocculation pretreatment on the ultrafiltration membrane fouling caused by different dissolved organic matters in treated wastewater","authors":"Lan-Yang Ren, Chen Liu, Ting Meng, Yingxue Sun","doi":"10.2166/wrd.2021.051","DOIUrl":"https://doi.org/10.2166/wrd.2021.051","url":null,"abstract":"\u0000 This study investigated the efficacy of using micro-flocculation as a pretreatment approach in alleviating ultrafiltration (UF) membrane fouling caused by organic matter in treated wastewater. Three typical model dissolved organic matters (DOM), humic acid, fulvic acid, and sodium alginate, were employed to simulate membrane fouling. The results showed that micro-flocculation using poly aluminum chloride (PAC) or polymerized ferric sulfate (PFS) as flocculant could effectively enhance the treatment performance of the UF process on DOM. With 6 mg/L PAC, the removal efficiency of humic acid, fulvic acid, and sodium alginate by micro-flocculation combined UF process reached 79.95%, 63.25%, and 51.14%, respectively. Specifically, after micro-flocculation, micromolecular hydrophilic organic matter (e.g., fulvic acid) tended to form a compact cake layer. The macromolecular hydrophobic organic matter (e.g., humic acid) and macromolecular hydrophilic organic matter (e.g., sodium alginate) generally led to a loose cake layer. At PAC dosage of 6 mg/L, the membrane specific flux (J/J0) at the end was improved by 11.71%, 10.27%, and 2.2% for humic acid, sodium alginate and fulvic acid solutions, respectively, compared with the UF process alone. It could be inferred that micro-flocculation pretreatment can effectively mitigate the membrane fouling when treating wastewater containing humic acid, sodium alginate, or fulvic acid.","PeriodicalId":17556,"journal":{"name":"Journal of Water Reuse and Desalination","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48699672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Removing free-floating oil from water using cationic polymers/surfactant-modified silica 使用阳离子聚合物/表面活性剂改性二氧化硅去除水中的浮油

IF 2.3

Journal of Water Reuse and Desalination Pub Date : 2021-09-13 DOI: 10.2166/wrd.2021.065

Anucha Ruksanti, Sorapong Janhom

{"title":"Removing free-floating oil from water using cationic polymers/surfactant-modified silica","authors":"Anucha Ruksanti, Sorapong Janhom","doi":"10.2166/wrd.2021.065","DOIUrl":"https://doi.org/10.2166/wrd.2021.065","url":null,"abstract":"\u0000 The purpose of this work was to evaluate the efficiency of oil sorption of silica particles modified by three different types of cationic polymers and a cationic surfactant. Low-molecular-weight polyethyleneimine (LPEI), high-molecular-weight polyethyleneimine (HPEI), polydiallyldimethylammonium chloride (PDM), and cetyltrimethylammonium bromide (CTAB) were used to modify the silica particles and then compared their performances for oil removal. The scanning electron microscope and zeta potential measurements were used to analyze the surface characteristics of unmodified and modified silica particles. Adsorptions of motor oil and palm oil on the modified silica particles have been investigated under various parameters such as the silica particle size, the oil concentration, the polymer/surfactant concentrations, and the pH. The results have shown that the modified silica particles enhanced the oil sorption ability by approximately 10–20 times depending on the size of silica particles, pH, and the type of polymer/surfactant used when compared with the unmodified silica particles. The highest palm oil adsorption values of LPEI-silica, HPEI-silica, PDM-silica, CTAB-silica, and unmodified silica were 2.40, 2.10, 1.95, 1.50, and 0.15 g/gsilica, respectively. Moreover, the oil sorption of the modified silica particles was increased by approximately 30–50% for the smallest-sized silica particles.","PeriodicalId":17556,"journal":{"name":"Journal of Water Reuse and Desalination","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42088215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photoelectrocatalytic generation of miscellaneous oxygen-based radicals towards cooperative degradation of multiple organic pollutants in water 光电催化生成杂氧基自由基协同降解水中多种有机污染物

IF 2.3

Journal of Water Reuse and Desalination Pub Date : 2021-08-25 DOI: 10.2166/wrd.2021.018

Yurou Zhou, Guan Zhang, Jing Zou

{"title":"Photoelectrocatalytic generation of miscellaneous oxygen-based radicals towards cooperative degradation of multiple organic pollutants in water","authors":"Yurou Zhou, Guan Zhang, Jing Zou","doi":"10.2166/wrd.2021.018","DOIUrl":"https://doi.org/10.2166/wrd.2021.018","url":null,"abstract":"\u0000 In the present photoelectrochemical (PEC) system utilizing MoS2 nanoflakes as a wide spectrum absorptive photoanode, simultaneous PEC degradation of different organic pollutants was achieved by employing in situ generated oxysulfur radicals, superoxide and hydroxyl radicals as strong oxidants. In order to better understand the cooperative PEC degradation of representative organic pollutants including rhodamine B dye (RhB), chlorpyrifos (CPF) and ciprofloxacin (CIP), the influences by bias potential, solution pH, radical scavenger, dissolved oxygen concentration and electrolyte concentration have been investigated. The selective PEC degradation efficiency follows the order of CPF > RhB > CIP in mixed substrates condition. In addition, the degradation rate for the single substrate degradation was about two times higher compared to that in mixed substrates degradation. The experimental results verified that reactive oxidation species (ROS) including oxysulfur radicals, superoxide and hydroxyl radicals can be efficiently produced on both anode and cathode under visible light irradiation, and they work together for simultaneous degradation of different pollutants, but the contribution of each ROS for pollutant degradation is substrate dependent. These results indicate that cooperative oxidation of multiple pollutants by miscellaneous oxygen-based radicals should be further considered as a promising advanced oxidation technique.","PeriodicalId":17556,"journal":{"name":"Journal of Water Reuse and Desalination","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2021-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48056906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22

Distribution of heat transfer coefficient in the vertical tube of falling film evaporator treating saline wastewater based on micro flow and experimental verification 基于微流的降膜蒸发器处理含盐废水竖管内传热系数分布及实验验证

IF 2.3

Journal of Water Reuse and Desalination Pub Date : 2021-06-22 DOI: 10.2166/wrd.2021.014

L. Bing, L. Youle, Chen Chuan, Xu Jianliang, Lian Huashan, Ma Zhun

{"title":"Distribution of heat transfer coefficient in the vertical tube of falling film evaporator treating saline wastewater based on micro flow and experimental verification","authors":"L. Bing, L. Youle, Chen Chuan, Xu Jianliang, Lian Huashan, Ma Zhun","doi":"10.2166/wrd.2021.014","DOIUrl":"https://doi.org/10.2166/wrd.2021.014","url":null,"abstract":"\u0000 It is still one of the significant solutions to treat saline wastewater with thermal desalination technology, especially falling film evaporators. To improve the performance of the falling film evaporator, a numerical study on the gas–liquid two-phase flow characteristics of saline wastewater in the vertical pipe was conducted using the VOF model. The results showed that the inlet velocity of the saline wastewater increased under the same operating conditions, resulting in the thickening of the liquid film and the increase of the average convective heat transfer coefficient. Increasing the inlet temperature of the working liquid reduced the temperature difference, which led to a decrease of the average convective heat transfer coefficient. In addition, as the inlet concentration of the working liquid increased, the film flow rate and the average convective heat transfer coefficient first decreased and then increased slightly. The experimental results verified the accuracy of the numerical simulation, and the average error was 9.27%.","PeriodicalId":17556,"journal":{"name":"Journal of Water Reuse and Desalination","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48921392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Performance modelling of direct contact membrane distillation using a hydrophobic/hydrophilic dual-layer membrane 使用疏水/亲水双层膜的直接接触膜蒸馏的性能建模

IF 2.3

Journal of Water Reuse and Desalination Pub Date : 2021-06-17 DOI: 10.2166/wrd.2021.072

Inci Boztepe, Stephen R. Gray, Jianhua Zhang, Jun-de Li

{"title":"Performance modelling of direct contact membrane distillation using a hydrophobic/hydrophilic dual-layer membrane","authors":"Inci Boztepe, Stephen R. Gray, Jianhua Zhang, Jun-de Li","doi":"10.2166/wrd.2021.072","DOIUrl":"https://doi.org/10.2166/wrd.2021.072","url":null,"abstract":"\u0000 HFP-co-PVDF/N6 hydrophobic/hydrophilic dual-layer membrane was used to study desalination with direct contact membrane distillation (DCMD). A one-dimensional (1-D) model was proposed to predict the flux and thermal efficiency. Heat and mass transfer equations were solved numerically for the combined hydrophilic and hydrophobic layers. The membrane characteristics of the hydrophobic layer were considered for the calculation of the mass transfer coefficients, while the hydrophilic layer was ignored since it was assumed to be filled with water. However, the hydrophilic layer was taken into account during the calculations of conductive heat transfer. Therefore, the equations are different, compared to single-layer hydrophobic membranes. It was found that with the same hydrophobic membrane characteristics, the single-layer membranes performed with better flux and thermal efficiency than the dual-layer membranes. Furthermore, the improvement of flux and thermal efficiency by an addition of the hydrophilic layer has not been observed experimentally, and it is suggested that the improved performance for dual-layer membranes reported previously is due to improved permeability by using thinner and more porous hydrophobic layers that can be mechanically reinforced by the hydrophilic layer. The validation of the model was conducted by comparing the experimental results for single- and dual-layer membranes with the modelling results. The predicted flux and thermal efficiency by the modelling were within 10% error to the experimental results.","PeriodicalId":17556,"journal":{"name":"Journal of Water Reuse and Desalination","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46876278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Application of low temperature soaking liquid in combined freezing-based desalination processes in summer 低温浸泡液在夏季联合冷冻脱盐工艺中的应用

IF 2.3

Journal of Water Reuse and Desalination Pub Date : 2021-06-16 DOI: 10.2166/WRD.2021.122

Hui Yang, Yuan-guang Jiang, Mengxiao Fu, Rui Wang

{"title":"Application of low temperature soaking liquid in combined freezing-based desalination processes in summer","authors":"Hui Yang, Yuan-guang Jiang, Mengxiao Fu, Rui Wang","doi":"10.2166/WRD.2021.122","DOIUrl":"https://doi.org/10.2166/WRD.2021.122","url":null,"abstract":"\u0000 In our previous study, it was noticed that the combined freezing, soaking and centrifugal desalination (FSCD) process is unsuitable to be applied in summer, because very little pure ice can be produced when the temperature of raw seawater used as soaking liquid reaches 27 °C. Therefore, two main efforts on the process optimization were made in this paper. One is that low-temperature seawater was served as soaking liquid in all the experiments. In real industrial practice, the low-temperature soaking liquid can be obtained through melting pure ice products or recovering cold energy from cold concentrated brine. The effects of centrifugal parameters and soaking time on salt removal efficiency and ice yield rate were investigated. Second, the gravity-induced method was combined to form freezing, soaking, gravity-induced and centrifugal desalination (FSGCD) process for further improvement of the salt removal efficiency. The influence of melting time of gravity-induced process was studied by keeping the samples ambient with an air temperature of 30 °C. Finally, the performance among different processes was compared. Results showed that the salt removal efficiency of FSGCD process can reach up to 97.03%. The study is effectively helpful to improve the process performance of soaking treatment in summer application.","PeriodicalId":17556,"journal":{"name":"Journal of Water Reuse and Desalination","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2021-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49021642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The removal efficiencies and mechanism of aniline degradation by peroxydisulfate activated with magnetic Fe-Mn oxides composite 磁性铁锰氧化物复合材料活化过硫酸氢盐对苯胺的去除效果及机理研究

IF 2.3

Journal of Water Reuse and Desalination Pub Date : 2021-06-01 DOI: 10.2166/WRD.2021.102

L. Qiao, Yu Shi, Q. Cheng, B. Liu, Jing Liu

引用次数: 19

Cutting-edge technology and systems for water treatment and reuse 水处理和再利用的尖端技术和系统

IF 2.3

Journal of Water Reuse and Desalination Pub Date : 2021-06-01 DOI: 10.2166/WRD.2021.001

P. Jin, Yingshu Sun, Can Wang, Huang Huang, Yin Wu

引用次数: 0

Effects of nitrate and glucose on the formation of chloronitromethane (CNM) under UV/chlorine treatment 硝酸盐和葡萄糖对紫外线/氯处理下氯硝基甲烷（CNM）生成的影响

IF 2.3

Journal of Water Reuse and Desalination Pub Date : 2021-05-20 DOI: 10.2166/WRD.2021.010

D. Lin, Xu Bohui, Zhu Fanfang, S. Prasad

{"title":"Effects of nitrate and glucose on the formation of chloronitromethane (CNM) under UV/chlorine treatment","authors":"D. Lin, Xu Bohui, Zhu Fanfang, S. Prasad","doi":"10.2166/WRD.2021.010","DOIUrl":"https://doi.org/10.2166/WRD.2021.010","url":null,"abstract":"\u0000 The existence of nitrate and dissolved organic matter (DOM) in water can react with chlorine disinfectant to form chloronitromethane (CNM) with high toxicity. The purpose of this study was to investigate the effects of NH4NO3, NaNO3 and Ca(NO3)2 on the formation of CNM under UV/chlorine treatment when glucose was used as the carbon source. The results showed that the formation of CNM from nitrate and glucose was raised first and then decreased. Among three types of nitrate, the potential of forming CNM from NH4NO3 was the largest. The concentration of CNM increased with increasing glucose concentration and UV intensity, while it decreased with increasing pH from 6 to 8. The analysis of various nitrogen showed that NH3-N and were converted into dissolved organic nitrogen (DON) under UV/chlorine treatment. The formation pathways of CNM from nitrate and glucose had been inferred under UV/chlorine treatment. Actual water samples were used to verify the laws found in the laboratory. The study could provide the development of a new disinfection method for water treatment and be useful for controlling the generation of CNM under UV/chlorine treatment.","PeriodicalId":17556,"journal":{"name":"Journal of Water Reuse and Desalination","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2021-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44532921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Evaluation of the benefit of practically operating reverse osmosis system in the factory: taking the recycling of KI solution and water of the screen polarizing plate as an example 反渗透系统在工厂实际运行的效益评价:以KI溶液和筛网偏振板水的回收为例

IF 2.3

Journal of Water Reuse and Desalination Pub Date : 2021-05-03 DOI: 10.2166/WRD.2021.110

S. Tseng, C. Lo, C. Hung

{"title":"Evaluation of the benefit of practically operating reverse osmosis system in the factory: taking the recycling of KI solution and water of the screen polarizing plate as an example","authors":"S. Tseng, C. Lo, C. Hung","doi":"10.2166/WRD.2021.110","DOIUrl":"https://doi.org/10.2166/WRD.2021.110","url":null,"abstract":"\u0000 In recent years, with the advocacy of the circular economy and the rising awareness of environmental protection, energy saving, water saving and carbon reduction have become important topics for discussion today. The high-tech semiconductor, photoelectric, solar and other electronic industries involve high energy and water consumption. In addition to responding to the energy saving, water saving and carbon reduction, one of the main purposes of this system development is to reduce the use of materials and make the process chemicals reusable. In the practical factory operation, a large amount of water is used in the polarization process, and the wastewater generated in etching and pickling is discharged continuously. In order to recycle the water discharging from the manufacturing process, the reverse osmosis membrane system (RO membrane system) is often used for wastewater recycling. In this study, the KI waste liquid discharging from the process of a polarizing plate factory was concentrated with anti-fouling RO membrane. The quantity and arrangement of RO system membranes were simulated and designed with software, and the results, such as water volumes and pressures of inflow and outflow water for the membrane, changes of membrane pressure difference (ΔP), changes of permeating water quality, chemical cleaning frequency and water collection time, were discussed and the optimal parameters of RO membrane, such as the best water collection volume and time, chemical cleaning frequency, best concentration, time and temperature matching with cleaning in process (CIP) were inferred so as to improve the stability of the RO membrane system, enable RO permeating water to enter the water purifying system for reuse, reduce the treatment cost of wastewater recycle and improve the permeating water output efficiency of treatment equipment, accommodating effective utilization of water resources and economic benefits and to sustainable development of the industry.","PeriodicalId":17556,"journal":{"name":"Journal of Water Reuse and Desalination","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2021-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43227009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10