Chemical and Biochemical Engineering Quarterly最新文献_第10页

Enhanced Removal of Cr(VI) from Aqueous Solutions Using Poly(Pyrrole)-g-Poly(Acrylic Acid-co- Acrylamide)/Fe3O4 Magnetic Hydrogel Nanocomposite Adsorbent 聚(吡咯)-g-聚(丙烯酸-丙烯酰胺)/Fe3O4磁性水凝胶纳米复合吸附剂对水溶液中Cr(VI)的去除效果研究

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2019-04-10 DOI: 10.15255/CABEQ.2018.1306

H. Hosseinzadeh, M. M. Tabatabai Asl

{"title":"Enhanced Removal of Cr(VI) from Aqueous Solutions Using Poly(Pyrrole)-g-Poly(Acrylic Acid-co- Acrylamide)/Fe3O4 Magnetic Hydrogel Nanocomposite Adsorbent","authors":"H. Hosseinzadeh, M. M. Tabatabai Asl","doi":"10.15255/CABEQ.2018.1306","DOIUrl":"https://doi.org/10.15255/CABEQ.2018.1306","url":null,"abstract":"In the present work, the structural characterization and chromium adsorption behavior\u0000of a novel poly(pyrrole)-based magnetic hydrogel nanocomposite (MHN) is reported. This product was prepared using free-radical copolymerization of pyrrole (Py), acrylic acid (AA) and acrylamide (AM) monomers, and subsequent in situ synthesis of magnetic Fe3O4 nanoparticles. The structure of MHNs was then characterized by FTIR, SEM, TEM, XRD, UV-Vis and VSM techniques, and a mechanism for the preparation of MHNs is also proposed. The maximum Cr(VI) adsorption capacity (208 mg g–1) was achieved under the optimum conditions that were found to be: AA = 0.25 mol L–1, AM = 1.2 mol L–1, agitation time = 90 min, solution pH = 1.0, ion concentration = 100 mg L–1, adsorbent dose = 50 mg, and temperature = 65 °C. Further, the calculated values of the thermodynamic parameters (ΔH° = 31.33kJ mol–1, ΔS° = 105.67 J K–1 mol–1, ΔG° = –61.33 kJ mol–1) revealed that ion adsorption is a spontaneous and endothermic process. In general, the results indicated that the synthesized MHNs with specific properties can be used in wastewater treatment applications.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"365 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2019-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80338423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Poly(3-hydroxybutyrate) Production from Natural Gas by a Methanotroph Native Bacterium in a Bubble Column Bioreactor 气泡塔生物反应器中甲烷化原生细菌从天然气中生产聚(3-羟基丁酸酯

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2019-04-10 DOI: 10.15255/CABEQ.2017.1263

Kianoush Kosravi-Darani, F. Yazdian, Fatemeh Babapour, A. Amirsadeghi

引用次数: 12

The Role of Redox Potential Measurement in Oak Barrel Wine Maturation 氧化还原电位测定在橡木桶葡萄酒成熟过程中的作用

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2019-04-10 DOI: 10.15255/CABEQ.2018.1469

M. Berovič, J. Nemanič

引用次数: 3

High-Voltage Electric Discharge Extraction of Bioactive Compounds from the Cocoa Bean Shell 高压放电提取可可豆壳中生物活性物质的研究

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2019-03-01 DOI: 10.15255/CABEQ.2018.1525

S. Jokić, N. Pavlović, A. Jozinović, Đ. Ačkar, J. Babić, D. Šubarić

引用次数: 14

Application of Chemical Engineering Methodology in Process Development: A Case Study of MenD-catalyzed Synthesis of 6-Cyano-4-oxohexanoic Acid 化学工程方法在工艺开发中的应用——以mend催化合成6-氰基-4-氧己酸为例

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2019-01-17 DOI: 10.15255/CABEQ.2018.1393

M. Sudar, I. Dejanović, Michael Vasić-Rački Đurđa Müller, Z. Blažević

引用次数: 1

Model-based Identification of Some Conditions Leading to Glycolytic Oscillations in E. coli Cells 大肠杆菌细胞中导致糖酵解振荡的一些条件的基于模型的鉴定

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2019-01-16 DOI: 10.15255/CABEQ.2017.1241

G. Maria, M. Mihalachi, C. Gijiu

引用次数: 2

Development of Near Infrared Spectroscopy Models for Quantitative Prediction of the Content of Bioactive Compounds in Olive Leaves 用于定量预测橄榄叶中生物活性化合物含量的近红外光谱模型的建立

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2019-01-16 DOI: 10.15255/CABEQ.2018.1396

D. Valinger, Matea Kušen, A. Tusek, M. Panić, Tamara Jurina, M. Benković, I. R. Redovniković, J. Kljusurić

引用次数: 15

A Robust Decomposition Methodology for Synthesis of Flexible Processes with Many Uncertainty Parameters – Application to HEN Synthesis 多不确定参数柔性过程综合的鲁棒分解方法——在HEN综合中的应用

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2019-01-16 DOI: 10.15255/CABEQ.2018.1400

Klavdija Zirngast, Z. Kravanja, Z. N. Pintarič

{"title":"A Robust Decomposition Methodology for Synthesis of Flexible Processes with Many Uncertainty Parameters – Application to HEN Synthesis","authors":"Klavdija Zirngast, Z. Kravanja, Z. N. Pintarič","doi":"10.15255/CABEQ.2018.1400","DOIUrl":"https://doi.org/10.15255/CABEQ.2018.1400","url":null,"abstract":"This contribution presents a new robust decomposition methodology for generating optimal flexible process flow sheets with a large number of uncertain parameters. During the initial steps, first-stage variables are determined by performing mixed-integer nonlinear programming (MINLP) synthesis of a flow sheet at the nominal conditions, and then by exposing the obtained flow sheet sequentially over a set of extreme MINLP scenarios of uncertain parameters. As a result, the sizes of the flow-sheet units gradually increase, and/or new units are added until the required feasibility is achieved. After testing the flexibility of the obtained design, a Monte Carlo stochastic optimization of the second-stage variables is performed using a sampling method in order to obtain an optimum value of the expected objective variable. The advantages of the proposed methodology are the independence of process model sizes from the number of uncertain parameters, the straightforward use of deterministic models for incorporating uncertainty, and relatively simple execution of MINLP synthesis of processes under uncertainty. Thus, it could be used for designing large processes with a large number of uncertain parameters. The methodology is illustrated by synthesis of a flexible Heat Exchanger Network.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2019-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47178747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Bioethanol Production from Dilute-acid Pre-treated Wheat Straw Liquor Hydrolysate by Genetically Engineered Saccharomyces cerevisiae 利用转基因酿酒酵母水解稀酸预处理麦草液生产生物乙醇

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2019-01-16 DOI: 10.15255/CABEQ.2018.1409

Nenad Marđetko, M. Novak, A. Trontel, M. Grubišić, Maja Galić, B. Šantek

{"title":"Bioethanol Production from Dilute-acid Pre-treated Wheat Straw Liquor Hydrolysate by Genetically Engineered Saccharomyces cerevisiae","authors":"Nenad Marđetko, M. Novak, A. Trontel, M. Grubišić, Maja Galić, B. Šantek","doi":"10.15255/CABEQ.2018.1409","DOIUrl":"https://doi.org/10.15255/CABEQ.2018.1409","url":null,"abstract":"Sustainable recycling of lignocellulosic biomass includes utilization of all carbohydrates present in its hydrolysates. Since wheat straw is a xylose-rich raw material, utilization of xylose from obtained liquid part (liquor) of hydrolysates improves overall bioprocess efficiency. In this work, dilute acid pre-treatment of wheat straw was performed in high-pressure reactor at different temperatures (160 °C – 200 °C), residence times (1 min – 10 min), and acids (H2SO4 and H3PO4) concentrations. During dilute acid pre- treatment, hemicellulose is degraded to pentose sugars that cannot be used by industrial ethanol- producing yeasts. Therefore, genetically engineered Saccharomyces cerevisiae strain that can utilize xylose was used. Fermentations were performed on different xylose-rich liquor wheat straw hydrolysates in shake-flasks and in horizontal rotating tubular bioreactor. The efficiency of fermentations carried out in shake flasks using xylose- rich liquor wheat straw hydrolysates were in the range of 19.61 – 74.51 %. However, the maximum bioprocess efficiency (88.24 %) was observed during fermentation in the HRTB on the liquor wheat straw hydrolysate obtained by pre- treatment with 2 % w/w phosphoric acid.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2019-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15255/CABEQ.2018.1409","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48451242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Submerged Cultivation of Ganoderma lucidum Biomass in Stirred Tank Reactor 搅拌槽反应器中灵芝生物质的潜水培养

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2019-01-16 DOI: 10.15255/CABEQ.2018.1371

M. Berovič, M. Popović

{"title":"Submerged Cultivation of Ganoderma lucidum Biomass in Stirred Tank Reactor","authors":"M. Berovič, M. Popović","doi":"10.15255/CABEQ.2018.1371","DOIUrl":"https://doi.org/10.15255/CABEQ.2018.1371","url":null,"abstract":"European isolated strain Ganoderma lucidum, its biomass formation, intracellular and extracellular polysaccharide production in batch and repeated fedbatch cultivation, were studied. The best fed batch results were obtained in the first feeding at 141 h at productivity of biomass Px = 0.016 g g–1 h–1, intracellular Pi = 0.010 g g–1 h–1, extracellular polysaccharides Pe = 0.007 g g–1 h–1, and percent value of polysaccharides per cell dry weight Pi/x = 5.0 % and Pe/x = 3.0 %. Although four feedings increased the amount of fungal biomass by 42.66 %, productivities of fungal polysaccharides Pi = 0.010 g g–1 L–1 and Pe = 0.011 g g–1 L–1 showed that at the fourth feeding, the biomass was already exhausted and polysaccharide production was reduced. Therefore, 210 h batch cultivation with Px = 0.095 g g–1 L–1, Pi = 0.078 g g–1 L–1 at Pi/x = 33 % and extracellular polysaccharides Pe = 0.095 g g–1 L–1 at Pe/x = 6.8 %, was found to be the best mode for G. lucidum fungal biomass and polysaccharides production. Non-Newtonian cultivation broth rheology was found to be influenced entirely by the concentration and morphology of the biomass.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2019-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46159225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3