Study On Recycling Of Potato Residue

Potato residue is a by-product in the process of production of potato starch. Its maincomponent is water, cell fragments and residual starch particles. The development ofdomestic potatoes processing industry is rapid in recent years; among them the potato starchproduction develops fastest. However, the enterprise achieves good development with thepollution rising. The potato residue is one of the most outstanding problem. Fresh potatoesresidue with a high content of water is unfavorable for storage, transportation. Because of itslow content of protein, high cotent of crude fiber, the potato residue is not fit for the feedingthe animals without any treatment. Due to the concentrated production season, a lot of potatoresidue accumulated. If not handled in time, it will be pile up like a mountain, and thencorrupt and easy to produce stench, cause environmental pollutio n. The component of thepotato residue was detected. And it found that dry matter content is10%or so. And in the drymatter, the starch content is55.62%, and fiber content is31.93%, the protein content is8.32%,the ash content is3.10%, fat content is0.42%. If the potato residue used up, it can not onlyreduce the pollution of the environment, and can make full use of resources.This paper studies the six methods to recycle the potatoe residue resources.The first way is to produce starch sugar and dietary fiber with potato residue. Potatoresidue was filtered after liquefaction, the soild was bleached to dietary fiber, and the liquidwas saccharified to starch sugar, then treated by decoloring, ion exchange, concentration orspray powder to get starch sugar.The second way is to produce alcohol and dietary fiber with potato residue. Potatoresidue was filtered after liquefaction, the soild was bleached to dietary fiber, and the liquidwas treated by adding yeast and saccharifying enzyme to ferment alcohol.The third way is to produce SCP (single cell protein) with potato residue by fermentation.Using a solid-state fermentation method, improve the protein content of potato residue,increase the feed nutrition value and palatability. With different yeast fermentation, andfinally select the best yeasts.Fourth, the potato residue after using high temperature resistant amylase liquefaction,filtering, solid processing for dietary fiber, add the liquid nutrients, yeast fermentation withalcohol is prepared to single cell protein.Fifth, the potato with high temperature resistant amylase liquefaction slag, filtering, solidprocessing for dietary fiber, liquid join the amount of saccharifying enzyme saccharificationand h, add nutrition composition, preparation with alcohol the yeast cell protein. The sixth, the potato with high temperature resistant amylase liquefaction slag, filtering,solid handled as a dietary fiber, liquid fermentation alcohol, add nourishment composition,with alcohol into the yeast cell protein.Through the experimental study and solve above six potato slag utilization way chemicalprocess and, at the same time, determine the measurement method of the product, for potatoslag circulation resource to provide the theory basis. Through the comparison of the six waysprocess technical feasibility and economic benefits, can choose the best utilization way, toreduce the production cost, increase the potato industry economic and social benefits.The research found that the third method is more economical and feasible method, thelow consumption, simple technology, the overall cost is much lower than other methods, andcan get high protein content of the single cell protein feed.