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Pickled red onion in jar Photo Credit Azurita/iStock/Getty Images. The process of pickling vegetables involves fermentation, often facilitated with the addition of vinegar. The high acid content of pickled vegetables discourages spoilage, which is one reason pickling was popular before the advent of refrigeration.Canned vegetables lose some, but not all, nutrients during the pickling process. Cucumbers are a popular vegetable for pickling.Artichokes, asparagus, beets, cabbage, carrots, cauliflower, celery, green beans, green tomatoes, peppers, okra and onions also respond well to pickling.ickled red onion in jar Photo Credit Azurita/iStock/Getty Images. The process of pickling vegetables involves fermentation, often facilitated with the addition of vinegar. The high acid content of pickled vegetables discourages spoilage, which is one reason pickling was popular before the advent of refrigeration.
The most prevalent microbiological problem facing the food industry is simple spoilage by bacteria, yeasts, or molds that are not hazardous to health. Chilling slows spoilage; proper freezing, drying, canning, and pickling arrest it completely.ermented and pickled foods owe their stability to the microbial development of organic acids by lactic bacteria or the addition of such acids to the foods, especially in the presence of a relatively high level of salt. Spoilage can occur either during the fermentation period or upon storage of the final product.