When the autumn season arrives, several nut trees tend to lose their crops, dropping nuts under trees, in the lawn, yard, and bushes, and sometimes beneath the tree.
Postharvest operations are practices that increase the value and condition of agricultural materials after they have been harvested. Primary postharvest operations such as shelling, threshing, dehulling, and decortication are critical in the production of pods, seeds, and nuts.
In recent years, modern machines for improving the condition of pods, seeds, and nuts have been built. For walnut processing, it mainly includes green walnut skin removing and walnut dehusking. In the article, Kingston Food Machinery will details the commercial processing of green walnut skin and walnut cracking. We sincerely hope the post will help you learn more useful information on industrial walnut production.
Walnut Green Skin Peeling
The green shell (husk) of walnuts is normally extracted by hand or by industrial equipment — Green walnut peeler machine.
It is a new generation of walnut processing machinery that integrates peeling, rough washing and fine washing of green walnuts. It consists of a frame, a hob, an integral single adjustable grille, double-pipe sprayer, sprayer protective cover, a spiral wire brush (rough washing), a short-bristle brush (fine washing) design, a reducer, and a motor.
The walnut breakage rate is low and the cleaning effect is great. It greatly reduces the labor intensity of green walnut peeling and cleaning, saves time and labor, and improves the quality and commodity rate of walnuts.
Application: it is an industrial equipment for fruit and vegetable processing plants, frozen food plants, snack food plants and so on.
Industrial Walnut Dehusking
For industrial walnut cracking, Commercial walnut crackers are available, but most of them works very well, and the ones that do are expensive. However, it is worth the investment since, in addition to reducing labor, time, and effort.
It will dehusk more than the number of workers can achieve. Machines are robustly built and provide the flexibility of multiple heads. Most of the rock collected during harvest would not damage Rollers. The opening head allows for easier entry. Handles varieties with thin shells without causing harm. Designed to allow unlimited nut flow to the chain without clogging.
Byproducts of Walnut Dehusking
The key byproduct of walnut production is green husk, which is extracted from walnut shells using husk machines that use abrasive metal components as the walnuts are shook under the impact of water jets. Walnut green husk is an agricultural waste that contains natural compounds of antioxidant and antimicrobial properties.
This wastewater includes elevated amounts of phenolic substances such as chlorogenic acid, caffeic acid, ferulic acid, sinapic acid, gallic acid, ellagic acid, protocatechuic acid, syringic acid, vanillic acid, catechin, epicatechin, myricetin, and juglone, with juglone having the highest concentration. Polyphenols are the main compounds responsible for walnut husk wastewater phytotoxicity and inhibiting the development of soil and water microorganisms, according to data.
As a result, reusing walnut husking wastewaters is not a common practice, owing to the potentially adverse effects of this wastewater on soil and crops. In terms of product consistency, walnuts should be picked on schedule, with their green covers extracted, as well as dried.
Walnut husking generates a considerable volume of wastewater comprising the water extractable components as well as hull residues. The new husking systems introduced by Kingston Machinery do not use water and emit much less wastewater than industrial systems. Since residual husks were not washed with water in this method, their portion sources were richer.
As a result, both wastewater and husk can be used as a more valuable resource, especially in the agricultural, chemical, medicinal, and cosmetic industries. A pollutant waste may be converted into a profitable raw material that is simple to transport and refine for these industries in this manner.