Effects of different drying methods of cauliflower waste on drying time, colour retention and glucoamylase production by Aspergillus niger NCIM 1054

Abstract

The non-edible portion of cauliflower (cauliflower waste) was subjected to drying by different methods. While conventional sun drying (CSD) took 1920 min to dry the waste, microwave drying (MWD) took only a few minutes. As against the L 3 value of 41.27 in samples with fresh cauliflower waste, the sample dried at 50°C showed L value of 38.16, and those dried at 200°C indicated an L value of 16.61. Highest glucoamylase (GA) activity was found in the samples containing waste dried at 50°C and the least in samples dried at 200°C. However, in samples containing waste dried at 70°C, using combinations, such as MWD and CSD, MWD and drying at 50°C, CSD showed comparable GA activity. The results indicate that the sample dried using the combination of MWD and drying at 50°C resulted in shorter drying period, good colour retention in the final product, and its incorporation resulted in significant enzyme production.

Production of Cellulases through Solid State Fermentation Using Kinnow Pulp as a Major Substrate

“…All the experiments were conducted in triplicates and the results have been reported as mean±SD using MS Excel or in terms of Critical Difference (CD) using the CPCS software procured from the Department of Mathematics and Statistics, Punjab Agricultural University, Ludhiana, India as described by Oberoi et al (2007).…”

“…A lot of work has been carried out in optimisation of suitable media for cellulase production using lignocellulosic materials employing fungal strains (Depaula et al 1999;Kansoh et al 1999;Shin et al 2000), but there is very scanty literature available on use of fruit or vegetable wastes for enzyme production (Oberoi et al 2007). Although, cellulases are produced by fungi, bacteria and actinomycetes, fungi have been commercially exploited for production of these enzymes and amongst fungi, Trichoderma and Aspergillus have been extensively studied (Adsul et al 2007).…”

Effect of high hydrostatic pressure on the quality of four edible flowers: Viola × wittrockiana, Centaurea cyanus, Borago officinalis and Camellia japonica

“…Until this moment, the unique technologies used by the industry are cold storage (Landi et al, 2015), hot air convective drying, freeze-drying and other drying methods (Oberoi et al, 2007;Ding et al, 2012;Zheng et al, 2015). However, all these methods have drawbacks: cold storage is a short-term food preservation method, hot air convective drying may cause undesirable biochemical and nutritional changes in the processed product that may affect its overall quality, and freeze-drying has high productive costs.…”

Nutritional Evaluation of Dehydrated Stems Powder of Cauliflower Incorporated in Mathri and Sev

“…It is considered as a rich source of dietary fiber and it possesses both antioxidant and anticarcinogenic properties. Disposal of the non-edible portion of cauliflower (cauliflower waste), which contributes to about 45-60% of the total weight of the vegetable, remains a crucial problem [8]. Unfortunately, cauliflower waste in developing countries like India does not find any significant commercial use, despite containing appreciable amount of proteins and minerals.…”