Read more
Read more
Read more
Contact with Spirit Access to become a member of East Africa potato value chain knowledge sharing portal Access to become researcher of East Africa potato value chain knowledge sharing portal

RESOURCE: View

Novel Combined Freeze-Drying and Instant Controlled Pressure Drop Drying for Restructured Carrot-Potato Chips: Optimized by Response Surface Method

March 13 2018 by INKOA
Resource image of the African potato platform

Combined freeze-drying and instant controlled pressure drop process (FD-DIC) for restructured carrot-potato chips was developed and its processing conditions were optimized using response surface methodology (RSM) with the purpose of improving the quality of products and reducing energy consumption. Three critical variables including the amount of carrot, the moisture content of the partially dried product before DIC treatment, and equilibrium temperature of DIC for the restructured chips were considered. 

Response parameters such as the final moisture content, color value ( L , a , and b ), and texture properties of restructured carrot-potato chips were investigated. The results showed that the graphical optimal ranges of FD-DIC drying process were as follows: the amount of carrot was 46–54% w/w, the moisture content of the partially dried product before DIC treatment was 0.20–0.35 g/g, and the equilibrium temperature of DIC was 85–95°C. Furthermore, the numerical optimization suggested that conditions were 47.43% w/w, 0.29 g/g, and 90.57°C, respectively. It could be concluded that the combined drying method of FD-DIC provided the restructured carrot-potato chips with higher quality, as compared to the freeze-dried chips. Considering the relatively high production cost of FD, this novel FD-DIC could be an alternative method for obtaining desirable restructured fruit and vegetable chips.

RELATED DOCUMENTS
Gender-differentiated trait preferences for sweetpotato varieties in Tanzania
January 11 2022 by INKOA

This report is an update of information on gender-differentiated producer and consumer preferred characteristics of sweet potato conducted at the Lake Zone of Tanzania.

How sustainable is your company?
December 22 2021 by INKOA

A guide to conduct an environmental diagnosis in horticultural processing MSMEs, developed by Horti-Green project (ENV/2017/391-383)

Potato-legume intercropping enhances climate resilience and adaptive capacity of smallholder farmers
February 13 2021 by INKOA

In this research brief, two potential roles of potato-legume intercropping are reported: (i) improved control of soil erosion to make potato production more sustainable in the highlands; and (ii) optimizing soil temperatures, soil water contents and soil nutrient balance thus enabling potato production in the drier midland agro-food systems. The results are derived from six separate studies conducted between the 2014 wet season and 2018 dry season in Kenya.

Individual ambient ware potato storage excels in Uganda
December 28 2020 by INKOA

Improved individual ambient storage units allow proper ware potato storage, are easy to maintain and help smallholder farmers fetch higher prices; more education and suitable financial products are needed that entice farmers to invest in these units to enable greater profitability.

Analysis of consumers’ point of view regarding sustainability issues in Kenya
October 25 2019 by INKOA

The analysis of consumers’ point of view regarding sustainability issues in Kenya is a document delivered in the context of the  Horti-Green project  (Inclusive Green Horticultural Processing Sector in Kenya).

View all resources
Disclaimer: This website has been developed with the financial assistance of the European Union.
The contents of this document are the sole responsibility of the consortium and can under no circumstances be regarded as reflecting the position of the European Union.