Nutrient cycling in the vegetable processing industry: Utilization of potato by-products

Abstract

Potato (Solanum tuberosum) production in Canada and the United States totals approximately 30 × 106 Mg yr-1. Approximately half of this is unsuitable for human consumption. This potato by-product comprises cull potatoes and potato processing waste (PPW). Liquid waste from processing plants can be applied to agricultural land. With strict environmental monitoring and control, crops such as corn (Zea mays L.), vegetables and grass can be used to divert large volumes of liquid waste. Solid waste and culls have traditionally been put in landfills or disposed of on agricultural land as a fertilizer. However these can be diverted from landfill sites or agricultural land and used as a high-quality animal feed, principally in beef feedlots. Research has shown that PPW can replace corn and barley (Hordeum vulgare L.) grain without negative effects on growth of beef cattle or meat quality. Indeed, efficiency of animal growth per unit diet intake is improved. These effects have been observed with diets containing up to 80% PPW. Results to date suggest that PPW is a valuable livestock feed ingredient and has no deleterious effects on beef quality. In areas where PPW is available, feeding to beef cattle represents a viable alternative to other disposal options. Key words: Potato, processing waste, by-product, cattle, land disposal

Evaluation of biochar-anaerobic potato digestate mixtures as renewable components of horticultural potting media

“…During the processing of potatoes in the United States and Canada, up to 50% of the total can be unsuitable for human consumption (Charmley et al, 2006). This waste can be fed to livestock, applied to agricultural fields as fertilizer, or dumped in landfills (Charmley et al, 2006;Nelson, 2010).…”

‘Potato Peel Dressing’: A Novel Adjunctive in the Management of Necrotizing Fasciitis

“…In regard to the confusion surrounding the peeling of potato, the peel obtained from a steamed potato is devoid of its nutrients because of the leaching effect, and the peels from raw potatoes are more suitable as a source of glycoalkaloids and phenolic compounds [7], hence although many studies advocate procuring the peel from a boiled potato [8,9], raw potato peel was chosen for the dressing in our case. The excellent medicinal properties of potato peel, its easy availability, the simplicity of the preparation and its affixation to gauze bandages make this dressing a feasible choice for non-healing wounds.…”

“Eco-Logical” Engineering: A Teaching-Research Model to Foster Students’ paradigm thinking of wastes as commodities

“…In accordance with the New Zealand Aquaculture Sector 's vision of "promoting environmental sustainability and integrity of aquaculture", new fish feed streams are required to sustain the industry economically and ecologically. Waste resources employed from the fi sh (Knuckley, 2004) or potato (Charmley et al, 2006) processing industries overseas demonstrated no noticeable effect on the growth rate or quality of fi sh produced. Using such waste products reduces the life cycle energy requirements and cost of feed pellets (Pelletier & Tyedmers, 2007) and is applicable in New Zealand.…”