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Waste vinegar residue, the by-product of vinegar processing, was used as substrate for phytase production from Aspergillus ficuum NTG-23 in solid-state fermentation to investigate the potential for the efficient re-utilization or recycling of waste vinegar residue. Statistical designs were applied in the processing of phytase production. First, a Plackett-Burman (PB) design was used to evaluate eleven parameters: glucose, starch, wheat bran, (NH(4))(2)SO(4), NH(4)NO(3), tryptone, soybean meal, MgSO(4)·7H(2)O, CaCl(2)·7H(2)O, FeSO(4)·7H(2)O, incubation time. The PB experiments showed that there were three significant factors: glucose, soybean meal and incubation time. The closest values to the optimum point were then derived by steepest ascent path. Finally, a mathematical model was created and validated to explain the behavioural process after these three significant factors were optimized using response surface methodology (RSM). The best phytase activity was attained using the following conditions: glucose (7.2%), soybean meal (5.1%), and incubation time (271 h). The phytase activity was 7.34-fold higher due to optimization by PB design, steepest ascent path design and RSM. The phytase activity was enhanced 0.26-fold in comparison with the results by the second step of steepest ascent path design. The results indicate that with waste vinegar residue as a substrate higher production of phytase from Aspergillus ficuum NTG-23 could be obtained through an optimization process and that this method might be applied to an integrated system for recycling of the waste vinegar residue.
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http://dx.doi.org/10.1177/0734242X11398521 | DOI Listing |
Chemosphere
December 2024
Inorganic Materials Research Laboratory, Department of Chemistry, Trent University, 1600 West Bank Dr., Peterborough, ON, Canada K9J 7B8. Electronic address:
2,4-dichlorophenoxy acetic acid (2,4-D) and 1,1-dimethyl-4,4-bipiridinium chloride (paraquat) are among the most widely used herbicides and are known to be toxic. Fabrication of green adsorbents which are capable of removing both herbicides remains a challenge. Here, we fabricate a novel adsorbent from tropical waste wood and use a facile, chitosan-mediated N-heteroatom functionalization technique to augment surface nitrogen and improve specific surface area.
View Article and Find Full Text PDFWater Res
December 2024
Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain. Electronic address:
Acidogenic co-fermentation of waste activated sludge (WAS) and food waste (FW) under thermophilic conditions enhances process consistency, while overcoming the problem of acetic acid consumption due to growing methanogens. Two long-term continuous co-fermentation experiments were carried out with a WAS:FW mixture (70:30 % in VS) at organic loading rate of 8 gVS/(L·d). Experiment 1 assessed the impact of temperature (35 °C and 55 °C) and WAS origin (WAS_A and WAS_B) in two collection periods.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Department of Seafood Science, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan. Electronic address:
Int J Biol Macromol
December 2024
National Institute of Plant Science Technology, Mahatma Gandhi University, Kottayam, India; School of Biosciences, Mahatma Gandhi University, Kottayam, India; School of Food Science Technology, Mahatma Gandhi University, Kottayam, India. Electronic address:
Therapeutic application of bacterial cellulose, a polymer produced by fermentative growth of bacteria, is often challenged by low yields and absence of high yielding strains. The current study reports the synthesis and characterization of bacterial cellulose from a novel microbial consortium of Weissela confusa, Neobacillus drentensis, and Bacillus sp. isolated from mother of vinegar and identified by 16S rDNA typing.
View Article and Find Full Text PDFBiotechnol Bioeng
December 2024
Department of Chemistry and ILOC, Niederrhein University of Applied Sciences, Krefeld, North Rhine-Westphalia, Germany.
The concept of sustainable production necessitates the utilization of waste and by-products as raw materials, the implementation of biotechnological processes, and the introduction of automated real-time monitoring for efficient use of resources. One example is the biocatalyzed conversion of the reusable by-product glycerin by acetic acid bacteria to dihydroxyacetone (DHA), which is of great importance to the cosmetic industry. The application of compact spectrometers enables the rapid measurement of samples while simultaneously reducing the consumption of resources and energy.
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