Bioproducts from Potatoes. A Review

Abstract

-The increasing amount of food waste througout the world is becoming a major problem for waste management plants. The food waste produced amounts to 1.3 million tons a year. This is a resource that could be used for production of new products. Decreasing fossil resources and a rapidly growing population lead to the necessity to produce more food and to replace existing with new materials ones that are biological and produce little effect on environment. Bioeconomy is a method that can help achieve production of value-added products that use local resources and waste to manufacture products efficiently. In this article, we are looking at possibilities to use potatoes for production of new materials, such as bioplastics, antioxidants, proteins, instead of their conventional use for food production. We have studied potato components, extraction technologies and summed up possible directions for development for new products, looking at the use of processing waste as a raw material.

Potato Glycoalkaloids: occurrence, biological activities and extraction for biovalorisation – a review

“…Industrially, 50% to 60% of the raw material consists of potato peel waste during processing. Thus, valorisation of this waste for the extraction of glycoalkaloids will likely contribute on the one hand in eliminating or at least reducing the waste, and on the other hand might pave the way for the production of novel and natural phyto‐pharmaceutical and food ingredients (Wu, ; Priedniece et al ., ).…”

Proximal composition, bioactive compounds and biorefinery approach in potato tubers of Solanum tuberosum Group Phureja: a review

“…Potato residues are generally considered a waste, and in most cases, they are discarded. As mentioned above, several researchers suggest that potato peel is a valuable source of bioactive compounds and nutrients, including antioxidants, dietary fibre, pigments, vitamins and minerals (Akyol et al , ; Fritsch et al , ; Priedniece et al , ; Pathak et al , ). Some approaches have recently proposed the valorisation of this waste through fermentation routes, which can provide industrial enzymes and biofuels as a promising source of energy (Galhano dos Santos et al , ; Gebrechristos & Chen, ).…”

“…An alternative route focuses on the use of potato juice from starch extraction as a source of proteins. These two components can produce food, feed or materials or be used as a platform for the synthesis of chemical compounds (Priedniece et al , ).…”

“…The extraction methods can be those conventional ones that involve the use of large amounts of solvents (e.g. mechanical agitation and homogenisation, reflux) or the emergent ones that allow selective isolation by altering some mobile structures (including ultrasound or microwave‐assisted extraction, pressurised liquids and supercritical fluids; Priedniece et al , ; Singh et al , ). These novel methods have high efficiencies and can reduce the use of organic solvents that cause negative effects on the environment (Fritsch et al , ; Priedniece et al , ).…”

“…In this sense, strategies for the valorisation of those residues have been explored, and applications including the use of such wastes as a source of ingredients for the food and pharmaceutical industries and their utilisation for energy production, and animal feed have been explored (Galhano dos Santos et al , ; Gebrechristos & Chen, ; Pathak et al , ). Researchers have shown that potato processing wastes can be an important source of compounds such as proteins, starch, glycoalkaloids (Priedniece et al , ; Gebrechristos & Chen, ), dietary fibre (Schieber & Saldaña, ; Scharf et al , ) and phenolic compounds (Singh & Saldaña, ; Singh et al , , ; Wijngaard et al , ; Akyol et al , ; Kumari et al , ). Due to the valuable composition, biorefinery approaches using potato peel as biomass to convert it into an array of products by means of different paths and processing methods have been proposed (Ahokas et al , ; Fritsch et al , ; Pathak et al , ).…”