Sodium gluconate and calcium gluconate methods are important techniques available for gluconic acid fermentation. The comparative analysis of these fermentations has been addressed using Aspergillus niger. The techniques are equally influenced by the spores age in slant growth, inoculum level in germination and production media, different levels of Fe, Cu, Zn and Mn. Sodium gluconate method is promising with respect to lesser time for slant age (3 d) and lesser time of fermentation (6 d) compared to the calcium gluconate method (slant age - 6 d, and time of fermentation - 7 d). © 1993 Springer-Verlag.

T Panda

Department Of Chemical Engineering

D. Subba Rao

calcium

GLUCONATE CALCIUM

GLUCONATE SODIUM

GLUCONIC ACID

Sodium

article

Aspergillus niger

Fermentation

GERMINATION

nonhuman

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Comparative analysis of calcium gluconate and sodium gluconate techniques for the production of gluconic acid by Aspergillus niger

Bioprocess Engineering

Single-stage direct bioconversion of cellulosic materials to ethanol, under almost the same fermentation conditions applied to the Saccharomyces cerevisiae-ethanol process, was attempted using intergeneric fusants of Trichoderma reesei QM 9414/S. cerevisiae NCIM 3288. Optimization of medium constituents was made using the Box-Behnken design method. The combined effect of pH and temperature on the fermentation was analyzed by the central composite design method. Under optimal conditions the fusant produced 0.17 g l-1 ethanol in 30 h. © 1995.

Enzyme and Microbial Technology

Direct conversion of cellulosic material to ethanol by the intergeneric fusant Trichoderma reesei QM 9414/Saccharomyces cerevisiae NCIM 3288

Gluconic acid fermentation by Aspergillus niger has been investigated using untreated and treated Indian cane molasses. The yield of gluconic acid was found to be reduced using an untreated molasses medium compared to a defined medium. Hence, molasses was subjected to various pretreatment techniques. Pretreatment reduced the levels of various cations and anions. As the synthesis of gluconic acid has been observed to be influenced more by cations than anions, the effect of various metal ions, viz., copper, iron, zinc, manganese, calcium, and magnesium on the yield of gluconic acid has been critically examined in both untreated and treated cane molasses. These results have been compared with a defined medium. The yield of gluconic acid was influenced more by a combination of metal ions rather than individual ions. Potassium ferrocyanide treatment gave the most promising results compared to other treatment techniques. © 1994 Springer-Verlag.

Critical analysis of the effect of metal ions on gluconic acid production by Aspergillus niger using a treated Indian cane molasses

To compare the efficiency of various whole cell immobilization techniques for the production of gluconic acid by Aspergillus niger were investigated using potassium ferrocyanide-treated cane molasses as the substrate. The techniques followed were: (1) Calcium alginate entrapment, (2) cross-linking with glutaraldehyde after cell permeabilization with (a) acetone, (b) toluene and (c) isopropanol and (3) development of granular catalyst. A comparative analysis of yield has revealed that calcium alginate entrapment was the most suitable technique as it had given the maximum product yield (0.40 g gluconic acid/g total reducing sugar supplied). The properties of immobilized A.niger in sodium alginate gel have been thoroughly investigated and compared with those of free cells under most suitable conditions of fermentation. © 1994 Springer-Verlag.

Comparative analysis of different whole cell immobilized aspergillus niger catalysts for gluconic acid fermentation using pretreated cane molasses

Biotechnology Progress

Fermentative production of injectable-grade calcium gluconate

PQQ and Quinoproteins

Production of Gluconic and Galactonic Acids from Whey

Biocatalysis

Sorbitol and Gluconate Production in a Hollow Fibre Membrane Reactor by Immobilized Zymomonas Mobilis

Biotechnology and Bioengineering

Citric acid production using immobilized conidia ofAspergillus niger TMB 2022

Biotechnology Letters

Membrane enclosed alginate beads containingGluconobacter cells and molecular dispersed catalase

Journal	Data powered by TypesetBioprocess Engineering
Publisher	Data powered by TypesetSpringer-Verlag
ISSN	0178515X
Open Access	No