Recovery of monosaccharides from dilute acid corncob hydrolysate by nanofiltration: modeling and optimization

Abstract

In this work Multi-objective optimization has been employed to obtain the optimal permeate flux (jv) and operating time (t) during the diananofiltration detoxification of dilute acid corncob hydrolysate process.

Investigation of dielectric constants of water in a nano-confined pore

“…3) differ from one shell to another. When n is too large, the number of water molecules in each layer is quite low and statistical uncertainties on the uctuation term on the right hand side of eqn (12) are dramatically amplied, which can even lead to nonphysical negative values as shown in Fig. 3 This might be an additional difficulty for the determination of dielectric constants inside pores of realistic nanoporous membranes whose effective diameters are expected to be 2-3 times smaller than that of our model nanopore.…”

“…3. The dielectric constant of conned pure water has been computed by applying eqn (12) in each concentric shell for various values of n. Results are shown in Fig. 3 for n ¼ 10, 20, 50 and 200.…”

“…[3][4][5][6] Among which, nanoltration (NF) membranes have been widely used in drinking water preparation, wastewater treatment, product desalination and purication and other elds due to its excellent separation performance. [7][8][9][10][11][12][13] However, due to the special effect brought by the complex structure of nanoltration membrane, research on the separation mechanism and theoretical model of nanoltration has become one of the difficulties in the eld of nanoltration research, which limits the development and application of nanoltration membranes. In recent years the special effect caused by the nanoscale size of nanoltration membrane has been paid more and more attention.…”

Production and detoxification of inhibitors during the destruction of lignocellulose spatial structure

“…Brás et al (2014) used a nano-separation membrane to detoxify the pretreatment solution of olive residue, and the results showed that 99 per of furan aldehydes, acetic acid, and formic acid could be removed, and the loss rate of reducing sugar reached 40%. When Jiang et al (2018) used nano-separation membrane to detoxify dilute acid pretreatment solution, they found that the removal rate of inhibitors was affected by solution pH, osmotic flux, and concentration of Na2SO4. When treated with low pH and high concentration of Na2SO4 for 35 min, 90 per of the inhibitors could be removed.…”

Strategies for the improvement of VFAs recovery in the nanofiltration process within the circular economy framework

“…The recovery percentage indicated that recovery percentages for each dropped almost 40-50 % of the previous cycle. This result may occur due to insufficient adsorption sites on the membrane surface in order for capturing VFAs compounds in the recirculation process (Ahsan et al 2014;Jiang et al 2018;Yang et al 2013), which strongly influences the recovery percentage attributes. In addition, these lower recovery percentages of VFAs are also caused due to membrane structure, CEST2021_00156 such as our selected membrane TS 40 was polypiperazine amide, which is less stable and more prone to membrane fouling compared to fully aromatic polyamide-based membranes (Tang et al 2009;Wadekar and Vidic 2017;Zacharof et al 2016).…”