scholarly journals Optimal Design of a Hydrolysis Sugar Membrane Purification System Using a Superstructure-Based Approach

Processes ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 168
Author(s):  
Chien-Yuan Su ◽  
Bo-Yan Ji ◽  
Pei-Jung Yu ◽  
Ming-Hua Wang ◽  
Wei-Chun Hung ◽  
...  
Keyword(s):  
Membrane Separation ◽  
High Yield ◽  
Separation System ◽  
Nanofiltration Membranes ◽  
Membrane Unit ◽  
Membrane Performance ◽  
Proposed Model ◽  
Purification System ◽  
Membrane Type ◽  
Membrane Networks

As an alternative to gasoline, bioethanol can be produced from lignocellulosic biomass through hydrolysis using an ionic solution containing zinc chloride (ZnCl2). This method allows for a high yield of glucose from lignocellulose, but entails the removal of ZnCl2 from the hydrolysate using multiple nanofiltration membranes before the fermentation of glucose. This paper presents a mathematical technique for designing such a multistage membrane separation system. The optimization model for the synthesis of membrane networks is based on a superstructure with all feasible interconnections between the membrane units, and consists of mass balances, logical constraints and product specifications. A case study of the separation of a bagasse hydrolysis solution is used to demonstrate the application of the proposed model. Results show that using both types of nanofiltration membranes allows higher ZnCl2 removal ratios at each membrane unit, hence a decrease in the number of membrane units required and a reduction of about 35% in capital cost compared to the cases in which only one membrane type is used. Further analysis is performed to examine the effect of membrane performance on the economics of the separation system.

scholarly journals High Enzymatic Recovery and Purification of Xylooligosaccharides from Empty Fruit Bunch via Nanofiltration

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 619
Author(s):  
Hans Wijaya ◽  
Kengo Sasaki ◽  
Prihardi Kahar ◽  
Nanik Rahmani ◽  
Euis Hermiati ◽  
...  
Keyword(s):  
Membrane Separation ◽  
Specific Activity ◽  
High Yield ◽  
Dual Function ◽  
Empty Fruit Bunch ◽  
Alkali Pretreatment ◽  
Nanofiltration Membranes ◽  
Degree Of Separation ◽  
Main Component ◽  
High Degree

Xylooligosaccharides (XOS) are attracting an ever-increasing amount of interest for use as food prebiotics. In this study, we used efficient membrane separation technology to convert lignocellulosic materials into a renewable source of XOS. This study revealed a dual function of nanofiltration membranes by first achieving a high yield of xylobiose (a main component of XOS) from alkali-pretreated empty fruit bunch (EFB) hydrolysate, and then by achieving a high degree of separation for xylose as a monosaccharide product. Alkali pretreatment could increase the xylan content retention of raw EFB from 23.4% to 26.9%, which eventually contributed to higher yields of both xylobiose and xylose. Nanofiltration increased the total amount of XYN10Ks_480 endoxylanase produced from recombinant Streptomyces lividans 1326 without altering its specific activity. Concentrated XYN10Ks_480 endoxylanase was applied to the recovery of both xylobiose and xylose from alkali-pretreated EFB hydrolysate. Xylobiose and xylose yields reached 41.1% and 17.3%, respectively, and when unconcentrated XYN10Ks_480 endoxylanase was applied, those yields reached 35.1% and 8.3%, respectively. The last step in nanofiltration was to separate xylobiose over xylose, and 41.3 g.L−1 xylobiose (90.1% purity over xylose) was achieved. This nanofiltration method should shorten the processes used to obtain XOS as a high-value end product from lignocellulosic biomass.

Effect of operating conditions on rejection of anionic pollutants in the water environment by nanofiltration especially in very low pressure range

1996 ◽  
Vol 34 (9) ◽  
pp. 149-156 ◽  
Author(s):  
C. Ratanatamskul ◽  
K. Yamamoto ◽  
T. Urase ◽  
S. Ohgaki
Keyword(s):  
Water Environment ◽  
Chloride Ions ◽  
Operating Conditions ◽  
Transmembrane Pressure ◽  
Operating Pressure ◽  
Nanofiltration Membranes ◽  
Single Solution ◽  
Crossflow Velocity ◽  
Membrane Type ◽  
New Generation

The recent development of new generation LPRO or nanofiltration membranes have received attraction for application in the field of wastewater and water treatment through an increasingly stringent regulation for drinking purpose and water reclamation. In this research, the application on treatment of anionic pollutants (nitrate, nitrite, phosphate, sulfate and chloride ions) have been investigated as functions of transmembrane pressure, crossflow velocity and temperature under very much lower pressure operation range (0.49 to 0.03 MPa) than any other previous research used to do. Negative rejection was also observed under very much low range of operating pressure in the case of membrane type NTR-7250. Moreover, the extended Nernst-Planck model was used for analysis of the experimental data of the rejection of nitrate, nitrite and chloride ions in single solution by considering effective charged density of the membranes.

Scale-Up Law of Vibrating Membrane Separation System.

2002 ◽  
Vol 28 (2) ◽  
pp. 143-149
Author(s):  
Katsuyoshi Tanida ◽  
Kazutaka Takata ◽  
Satoru Komori
Keyword(s):  
Membrane Separation ◽  
Scale Up ◽  
Separation System ◽  
Vibrating Membrane

Hydrophilic ultrafiltration membranes with surface-bound eosin Y for an integrated synthesis-separation system of aqueous RAFT photopolymerization

2020 ◽  
Vol 8 (19) ◽  
pp. 9825-9831
Author(s):  
Yujie Zhao ◽  
Senlin Shao ◽  
Jiangbin Xia ◽  
Ya Huang ◽  
Yu Chi Zhang ◽  
...  
Keyword(s):  
Membrane Separation ◽  
Raft Polymerization ◽  
Ultrafiltration Membrane ◽  
Separation Process ◽  
Eosin Y ◽  
Separation System ◽  
Ultrafiltration Membranes

The photocatalyst-based ultrafiltration membrane fitted integrated synthesis–separation system holds the promises to bridge the gap between the precision of PET-RAFT polymerization and the efficiency of membrane separation process.

Porous Elastic Filter Material in Water Depth in the Processing of the Application

2012 ◽  
Vol 482-484 ◽  
pp. 1068-1072
Author(s):  
Qiang Liu ◽  
Li Li Zhao
Keyword(s):  
Water Quality ◽  
Water Depth ◽  
Compression Ratio ◽  
Quartz Sand ◽  
Membrane Separation ◽  
Removal Rate ◽  
Filter Material ◽  
Average Concentration ◽  
Feed Water ◽  
Separation System

Investigation porous elastic filter material deep treatment of drinking water contamination removal in effect. The membrane separation system to meet the requirements of the feed water quality, in this paper the new type of porous elastic filter material compression filter technology and traditional quartz sand filter technology water depth contrast the treatment effect experimental study. The results showed that different compression ratio of porous elastic filter material to filter pollutants has good removal efficiency, and better than quartz sand. Porous elastic filter material compression ratio and turbidity, the average iron removal rate was significantly positive correlation. The compression ratio for 70% of the porous elastic filter material after filter, and the effluent turbidity of, iron, CODMn and DOC average concentration of were 0.35 NTU, 0.05, mg • L-1,1.73 mg • L-1 and the 1.48 mg • L-1; Basic meet the membrane separation system of the feed water quality requirements.

Characterization of polymeric nanofiltration membranes for systematic analysis of membrane performance

2006 ◽  
Vol 278 (1-2) ◽  
pp. 418-427 ◽  
Author(s):  
K. Boussu ◽  
Y. Zhang ◽  
J. Cocquyt ◽  
P. Van der Meeren ◽  
A. Volodin ◽  
...  
Keyword(s):  
Nanofiltration Membranes ◽  
Systematic Analysis ◽  
Membrane Performance

Development of a high-yield expression and purification system for platelet factor 4

Platelets ◽  
2017 ◽  
Vol 29 (3) ◽  
pp. 249-256 ◽  
Author(s):  
Angela Huynh ◽  
Donald M. Arnold ◽  
Jane C. Moore ◽  
James W. Smith ◽  
John G. Kelton ◽  
...  
Keyword(s):  
Platelet Factor 4 ◽  
High Yield ◽  
Expression And Purification ◽  
Platelet Factor ◽  
Purification System
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