Apple pomace ultrafiltration sludge - A novel substrate for fungal bioproduction of citric acid: Optimisation studies

被引：46

作者：

Dhillon, Gurpreet Singh ^{[1
]}

Brar, Satinder Kaur ^{[1
]}

Verma, Mausam ^{[2
]}

Tyagi, Rajeshwar Dayal ^{[1
]}

机构：

[1] Univ Quebec, INRS ETE, Quebec City, PQ G1K 9A9, Canada

[2] IRDA, Quebec City, PQ G1P 3W8, Canada

来源：

FOOD CHEMISTRY | 2011年 / 128卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Apple pomace ultrafiltration sludge; Inducer; Response surface methodology; Submerged fermentation; Total suspended solids; FERMENTATION; STARCH;

D O I：

10.1016/j.foodchem.2011.03.107

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Ever-growing demand for citric acid (CA) and urgent need for alternative sources has served as a driving force for workers to search for novel and economical substrates. Submerged fermentation was conducted using apple (Mains domestica) pomace ultrafiltration sludge as an inexpensive substrate for CA bioproduction, using Aspergillus niger NRRL567. The crucial parameters, such as total suspended solids and inducer concentration, were optimised by response surface methodology for higher CA production. The optimal CA concentrations of 44.9 g/100 g and 37.9 g/100 g dry substrate were obtained with 25 g/l of initial total solids and 3% (v/v) methanol and 25 g/l of total solids and 3% (v/v) ethanol concentration, respectively, after the 144 h of fermentation. Results indicated that total solids concentration, and methanol as an inducer, were effective with respect to higher CA yield and also indicated the possibility of using apple pomace sludge as a potential substrate for economical production of CA. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：864 / 871

页数：8

共 22 条

[1] Optimization of process parameters for cephalosporin C production under solid state fermentation from Acremonium chrysogenum [J].