Food Technology and Processing : beverage

Showing posts with label beverage. Show all posts

Showing posts with label beverage. Show all posts

The Importance of Carbonation in Beverages

Carbonation is a critical sensory element in beverages, enhancing their overall appeal by elevating aroma and creating a distinctive mouthfeel often described as "tingling." This process involves the infusion of carbon dioxide (CO2) gas into a beverage, imparting sparkle and a tangy taste while also serving as a preservative to prevent spoilage.

In carbonated soft drinks, the level of carbonation plays a pivotal role in delivering the desired sensory experience. It contributes significantly to the mouthfeel and taste that consumers expect, making it a key factor in the acceptability of these beverages.

There are two primary methods of introducing carbonation into liquids. The first is "forced carbonation," where the liquid is chilled and pressurized with CO2 gas to dissolve it effectively. This method ensures precise control over the carbonation levels, resulting in consistent quality and taste across batches.

The second method is "bottle carbonation," where carbonation occurs naturally during the fermentation process in sealed bottles. This method is commonly used in the production of certain beers and sparkling wines, imparting a unique character to these beverages.

Recent advancements in carbonation technology have focused on optimizing the process for efficiency and sustainability. Innovations include the development of CO2 capture and reuse systems to minimize carbon emissions associated with carbonation processes.

In conclusion, carbonation is not only essential for the sensory appeal of beverages but also plays a crucial role in preserving their quality and enhancing consumer satisfaction. Advances in carbonation techniques continue to drive innovation in the beverage industry, ensuring consistent quality and environmental responsibility.
The Importance of Carbonation in Beverages

The Origins and Global Influence of Pilsner

Pilsner, a pale lager beer, originated in the city of Pilsen (Plzeň) in what is now the Czech Republic. This beer style was developed in the mid-19th century in response to inconsistent brewing practices that plagued traditional beers. In 1842, the citizens of Pilsen took action, hiring Bavarian brewer Josef Groll. Groll combined local ingredients, including Moravian malt and Saaz hops, with Bavarian brewing techniques, resulting in the creation of the world’s first batch of Pilsner.

One of the key elements that sets Pilsner apart is the quality of water used in its brewing. Pilsen’s water is notably high in minerals like calcium and magnesium, which are responsible for the beer’s signature crispness and clean finish. This "hard" water differs from the softer water often used in brewing other types of lagers, contributing to a distinct and refreshing taste.

Pilsner is characterized by its light color, ranging from pale gold to bright straw. This hue, combined with the beer's clarity, is achieved through the use of pale malt and a brewing process that emphasizes both clarity and purity. The visual appeal of Pilsner—its light color and effervescence—contributes to its refreshing quality.

Beyond its birthplace, Pilsner has had a profound influence on beer globally. Its balanced bitterness, derived from noble hops like Saaz, and refreshing finish have made it a favorite style for brewers worldwide. The Pilsner style has inspired countless variations and is now a global standard for pale lagers, appreciated for its balance, flavor, and drinkability. Its impact on the beer industry remains undeniable as one of the most enduring beer styles today.
The Origins and Global Influence of Pilsner

Traditional Alcoholic Beverages: A Cultural Journey Through Fermentation

Throughout history, various traditional methods of producing alcohol from natural ingredients have emerged, each shaped by the distinct cultural practices and resources of different regions. Here are some prominent examples:

Mead Mead is one of the oldest alcoholic beverages, crafted by fermenting honey with water. To enhance its flavor, fruits, spices, grains, or hops are sometimes added. Mead can vary from sweet to dry, with an alcohol content typically ranging from 8% to 20%. The fermentation process involves combining honey and water, allowing yeast—either naturally occurring or added—to convert the sugars into alcohol.
Sake Sake is a traditional Japanese alcohol made from fermented rice. The production process includes polishing the rice to remove the bran, then fermenting it with water, yeast, and koji mold (Aspergillus oryzae). The koji mold breaks down the rice starches into sugars, which the yeast ferments into alcohol. Sake generally has an alcohol content of about 15% to 20%.
Chicha Chicha is a traditional South American drink made from fermented maize (corn). The process varies by region, but often involves chewing the maize to mix it with saliva, which contains enzymes that convert starches into fermentable sugars. The chewed maize is then mixed with water and left to ferment. The alcohol content of chicha can vary, depending on the fermentation method and duration.
Palm Wine Palm wine is an alcoholic beverage produced from the sap of various palm trees, such as the date palm, coconut palm, and oil palm. The sap is collected by tapping the tree and is allowed to ferment naturally due to the presence of wild yeast. Palm wine is typically consumed fresh, as it ferments rapidly and can become sour within a day. The alcohol content usually ranges from 4% to 6%.
Kvass Kvass is a traditional fermented drink from Slavic and Baltic regions, made from rye bread. The bread is soaked in water, and yeast and sugar are added to start the fermentation process. Kvass is mildly alcoholic, typically containing less than 1% to 2% alcohol, and is often flavored with fruits, berries, or herbs.

These traditional techniques underscore the diversity of alcoholic beverages and reflect the creativity of different cultures in utilizing natural ingredients to produce unique and flavorful drinks.
Traditional Alcoholic Beverages: A Cultural Journey Through Fermentation

Spray drying instant coffee

Spray drying instant coffee refer to a type of coffee that has been treated with a spray drying process that remove all the water from the coffee beans.

Spray dryers are rapid dryer, drying rate is high. Product quality can be controlled and maintained in drying process. Highly controllable drying systems flow of hot air, droplet speed and droplet temperature can be effectively controlled.

With spray-dried coffee, the texture of the coffee powder is usually very fine for most people. Coffee aroma consists of a complex mixture of volatile compounds, whereas non-volatile compounds contribute to flavors such as sourness, bitterness, and astringency.

Spray drying is achieved by spraying liquid coffee concentrate as a fine mist into very hot, dry air. The droplets are dried in very hot air (approx. from 80 to 180˚C) and evaporate leaving behind the coffee powder.

The spray drying process is very quick and uses high heat. Because of that, the process produces fine and small particles, which results as a powdered form.
Spray drying instant coffee

Bottom-fermented lager

Lager made with yeast that settle on the bottom (Saccharomyces carlsbergensis) of the container used. Thus, all the yeast and other material settles on the bottom which results in a clear beer. Lagers are distinguished from ales, or top-fermented British types of beer.

Lager is a German word that translates as “storage,” which gives a hint as to its method of brewing. Lagers are beers that are ferment slowly at low temperatures.

Lagers generally requires a bit more time to age after primary fermentation is complete. Perhaps 3-4 weeks. Depends on alcohol strength, style, etc. Lagers include many of America's famous beers, including Budweiser, Busch Lite, Coors, Miller Genuine Draft, and PBR.

Lagers are a typical entry point into beer for new drinkers. It has a lower tolerance to alcohol; lagers can taste light and a little malty. Classic lagers in America include Miller High Life, Coors, Budweiser and Yuengling.

Bottom-fermented lagers have their origins in continental Europe. Lagers were discovered by accident in the 1500s when it was found that storing brews made with cold-resistant yeast for a month produced a crisper beer. In 1420 beer was made in Germany by a bottom-fermentation process, so called because the yeast tended to sink to the bottom of the brewing vessel.
Bottom-fermented lager

Bottling of soft drink

Soft drinks generally include non-alcoholic beverages, such as bottled water, sugar sweetened beverages, carbonated beverages, sport drinks, energy drinks, diet drinks, fruit beverages, juice drinks and fruit-flavored drinks.

The first step in the production of soft drinks is the syrup preparation. The syrup is a sugar and water solution, in which sugar or glucose can be used, while diet drinks are prepared using sweeteners or a combination of sugar and sweeteners.

In the bottling step, the syrup is mixed with the main ingredient, water. Conventional soft drinks contain 90 percent water, while diet soft drinks may contain up to 99% water.

Carbonated water constitutes up to 94% of a soft drink. Carbon dioxide adds that special sparkle and bite to the beverage and also acts as a mild preservative. In order for carbonation (absorption of carbon dioxide to occur, soft drinks are cooled using large, ammonia-based refrigeration systems.

Carbon dioxide is a unique suitable gas for soft drinks because it is inert, non-toxic, and relatively inexpensive and easy to liquefy. The carbonation of soft drinks varies from 1.5 to 5 g/L. Carbon dioxide is supplied to soft drinks manufacturers either in solid form (as dry ice) or in liquid form maintained under high pressure in heavy steel containers.

Carbonation is generally added to the finished product, though it may be mixed into the water at an earlier stage. Fruit-flavored soft drinks tend to have less carbonation than colas or sparkling water.

Modern methods of processing are aimed at optimizing all quality factors by use of highly efficient, short‐time processing, followed by pasteurization and aseptic filling.

The finished product is transferred into bottles or cans at extremely high flow rates. Empty bottles and cans are transported automatically to the filling machine via bulk material handling equipment. The containers are immediately sealed with pressure-resistant closures, either tinplate or steel crowns with corrugated edges, twist offs, or pull tabs.

Because soft drinks are generally cooled during the manufacturing process, they must be brought to room temperature before labeling to prevent condensation from ruining the labels. This is usually achieved by spraying the containers with warm water and drying them.

Filling are all performed almost entirely by automatic machinery. Returnable bottles are washed in hot alkaline solutions for a minimum of five minutes and then rinsed thoroughly. Single-use containers are usually air- or water-rinsed before filling.

The filling room usually is separated from the rest of the facility, protecting open product from any possible contaminants.

After the filling process, the soft drinks are sent to the distributor, who can repack the drinks in smaller quantities or deal directly to the final customers.
Bottling of soft drink

General techniques of beer production

Beer is an alcoholic beverage made by brewing and fermentation from cereals, usually malted barley, as well as maize and flavoured with hops and the like for a slightly bitter taste. Beer is the most consumed alcoholic beverage in the world and the third most popular beverage after water and tea.

The manufacturing processes of beer essentially involves treatment of grains, malting or germination, mashing or extraction with water, filtration and fermentation. However, the advanced techniques have allowed brewers to produce beer in a more sophisticated and efficient way.

The raw materials for beer production generally include cereal (barley malt, rice or maize), hops, water, and yeast. Malted barley is the main ingredient, which, when milled and heated in water to extract its nutrients, provides a nourishing sugar and protein-rich solution named wort (pronounced as wert). It is an ideal medium in which yeast may grow and ferment. The malting process converts the starch in the cereal into fermentable sugar which is extracted from the malt during mashing.

Hops is added to the boiling wort as it was discovered that hops had anti -bacterial properties which preserved the wort and fermented beer, giving the beer a refreshing bitter taste.

Germination process is halted at desired malt quality, green brown malt is converted to stable, storable product, colour and flavour are also developed, enzymes are stabilized and preserved, and unwanted flavours are removed.

The mixture of milled malt, gelatinized adjunct and water is called mash. Mashing consists of mixing and heating the mash in the mash tun, and takes place through infusion, decoction or a combination of the two.

The objectives of mashing are solubilization and dissolution of grain components, breakdown of grain cell wall structure extraction and hydrolysis of starch, sugars, proteins and non-starch polysaccharides and fermentable sugar profile is established. This process producing a liquor called sweet wort.

Once the wort is cooled, it is oxygenated and blended with yeast on its way to the fermentor. The wort is then put in a fermentation vessel. Fermentation of the wort carried for 5-6 days at controlled temperature of 16ᵒC with the help of glycol.

During the fermentation, alcohol level is established, flavour profile of beer is established and carbonation level is established. At the end of fermentation, yeast flocculates and can be easily separated. The tanks are then rapidly cooled from 16ᵒC to - 2ᵒC with the help of glycol within 72 hrs.

Beer aging or conditioning is the final step in producing beer. Cold maturation temperatures will influence beer clarity.

The filtration takes place in a kieselguhr (diatomaceous earth) filter using frame, candle, or mesh filters. Spent kieselguhr can be used in farming, reprocessed, or as building material. Following filtration beer is stored in “bright beer tanks” and is ready for packaging in the bottling section.
General techniques of beer production

Yogurt drinks

Yogurt is among the most common dairy products consumed around the world, and its sensory attributes have a large effect on consumer acceptability. It is a major source of essential macro and micronutrients, contributes to the daily energy intake and as such is an important part of the human diet. Yogurt is commercially available in various forms and is highly appreciated for its sensory properties and ease of consumption.

Drinkable yogurt, categorized as stirred yogurt with a low viscosity, is a growing area of interest based on its convenience, portability, and ability to deliver all of the health and nutritional benefits of stirred or set yogurt.

Yogurt drinks are prepared from a yogurt mix with reduced milk solids, giving it a low viscosity. The steps for manufacture of yogurt drink are similar to that of yogurt, except for breaking of the coagulum after fermentation, achieved by high speed of agitation. Separation of whey in such products is challenging, and it is necessary to include a stabilizer such as gelatin or carboxymethyl cellulose.

Flavors and other ingredients can also be added, prior to the post-fermentation homogenization step.

Drinking yogurt generally consist of 1.5% fat, 9% milk nonfat solids, up to 8% sugar, 0.5% stabilizer, and 5–15% fruit syrup. Pasteurization or ultra-heat treatment is often involved in the production process to enhance the product’s shelf life.

Yogurt drinks

Antimicrobial properties of Kombucha tea’s

Kombucha tea contains probiotic ingredients and has antimicrobial properties. That means it has the power to fight viruses and bacteria.

Researchers have demonstrated kombucha’s antimicrobial activity against a large number of pathogenic microorganisms even at neutral pH and after denaturation.

The antimicrobial effects of kombucha are often attributed to its low pH, which wreaks havoc for pathogenic organisms such as Bacillus cereus, Escherichia coli, Helicobacter pylori, Listeria moncytogenes, Micrococcus luteus, etc.

Acetic acid has been suggested to be a major antimicrobial agent in kombucha tea, in conjunction with other compounds like bacteriocis and tea-derived phenolic compounds.

The weak gluconic and acetic acids in kombucha specifically target and shut down pathogenic organisms by disrupting their cell membranes, changing the pH of the pathogenic cells, and creating an excess of toxic anions, to finish the job.
Antimicrobial properties of Kombucha tea’s

Utilization of grapes

Grapes are small, juicy, sweet fruit that grows in woody vines throughout much of the world, virtually everywhere the climate will support any of the many varieties that exist.

Grapes are mainly used for wine and related fermented products (such as vinegar, wine) with table grapes and raisin a distant second and third, respectively in ranking. Grapes are also utilized to produce unfermented grape juice, jams and jellies.

Much of the world production of grapes ends up as wine, and it is made into a bewildering array of types and price points. Approximately 70 percent of the world’s grape production goes into wine.

Grape juice is derived from grapes that are expressed to extract their juice; separated from the pulp, seeds and skin; and pasteurized at 185 degrees. More expensive grapes may be grown specifically for grape juices and may not necessarily be concentrated or frozen.

Grapes are planted as vines or cuttings from older plants. The cuttings produce arms bearing fruit, the greatest yields coming after 3 years of growth. Properly pruned and cared for, vines produce fruit for many years.
Utilization of grapes

What is soy milk?

Soy milk is a milk-like liquid that is made from crushed soybeans. Soybean is the only legume from which such a liquid can be made.

Soy milk is part of many baby formulas for infants who are lactose-intolerant. Soy milk can be drunk as a beverage. Dried soy milk is sometimes added to products such as ice cream. Commercial products contain water, homogenized soybeans, vegetables, oils and sometimes kelp.

Unless specified otherwise, soy milk is not fortified with vitamin A or D or minerals. Nutritionally, fortified soy milk can be a good source of vitamin B12. Soy milk contains a modest amount of isoflavones.

According to the study, regular consumption of foods high in soy protein, which contain significant amounts of isoflavones, can lower the level of low-density lipoprotein (LKDL) cholesterol in the blood as much as 10 percent.

Soy milk has strong flavor associated with an enzyme that is released when soybeans are crushed. The intensity of this flavor is directly affected by the way the milk is produced and can be greatly reduced of the soybeans are crushed in boiling water.

Soy milk is prepared by first soaking beans in water, grinding the moistened beans and then filtering to remove the particles.
What is soy milk?

Health benefits of papaya leave juice

Health benefits for treatment of cancer, papaya leaf juice is claimed to have reversed cancer in many people living on the Gold Coast in Australia.

There is also news that papaya leaf juice can help reduce dengue fever. The juice of papaya leaf has been seen to arrest the destruction of platelets that has been the cause for so many deaths this dengue season.

Researchers have found that enzymes in the papaya leaf can fight a host of viral infections, not just dengue and can help regenerate platelets and white blood cells.

Papaya leaf is often used in herbal medicines to remove intestinal worms as it contains tannins that protect the intestine from re-infection from tanning proteins in the lining of the intestinal wall.

Papaya leaf juice aids in the breakdown and metabolism of protein, exhibits anti-ulcer activity and helps to relieve indigestion. Papaya leaf contains the powerful proteolytic enzymes, papain and chymopapain, which digest proteins, small peptides, amides and esters.

Since stomach ailments are often the direct result of indigestion, papaya leaf juice may help prevent and remedy these by increasing digestive processes, as the digestive properties of papain are well established.

Papaya leaf juice also is often used in some parts of the world as a prophylactic for preventing malaria in certain endemic regions.
Health benefits of papaya leave juice

Tea decaffeination by ethyl acetate process

Decaffeination of tea is desirable to regulate caffeine intake. Decaffeinated tea is produced by removing 60% to 90% of the caffeine from black tea by solvent extraction.

The most common decaffeinating solvent is ethyl acetate. Ethyl acetate is derived as a result of the reaction between ethanol and acetic acid.

This process considered a natural method because the compound occurs naturally in fruits, vegetables and other plants, tea leaves are bathed in water, washed with ethyl acetate to remove the caffeine and then dried. This process leaves a maximum carrier residue of 1 ppm or less, and a maximum caffeine residue of .08 percent, dry weight.

The tea is 99.9 percent decaffeinated at the end of the process, and has 8 percent maximum water content when leaving the factory. Decaffeinated Ceylon Black is processed in this manner.

Tea decaffeinated using ethyl acetate loses up to two-thirds of its flavonoids content. This process is less expensive and some people detect a slight aftertaste.
Tea decaffeination by ethyl acetate process

Antioxidants in tea

Tea, a beverage originating from a single species of plant, Camellia sinensis, is widely cultivated around the world in both tropical and subtropical regions.

Tea us a natural source of antioxidants. The actual concentration of antioxidants in tea varies according to the type of tea and its manufacture.

Some of the research that has been done with tea and its antioxidants have given some proof that it may help to guard against certain types of cancer, weight loss and it may even help protect against the onset of Alzheimer's, along with other diseases.

Antioxidants prevent cell damage due to oxidation by intercepting free radicals and have been credited with reducing the impact of such diseases as macular degeneration.

In addition to this, various research studies appear to indicate that tea may even reduce the relative risk for diabetes as well as improve insulin sensitivity.

From biological point of view, the largest and most important groups of tea leaf components are polyphenols. There are three major polyphenols in teas: catechins, theaflavins and thearubigins. Catechins are major constituents of green tea leaves and are also present in Oolong and black tea, whereas thearubigins and theaflavins are found only in black tea and Oolong teas.

The most important catechins contained in tea leaves are epigallocatechin gallate, epigallocatechin, epicatechin gallate and epicatechin.

Tea catechins lower blood sugar levels by inhibiting the action of amylase, an enzyme that breaks down starches such as carbohydrates and coverts them into glucose.

There is research on tea and its possibility of lowering the incidence of skin cancers plus the ability to aid smokers in recovering and repairing damaged cell structure.

Current evidence would suggest that antioxidants retard deterioration caused by oxidation especially of fats, oils and foods and thus provide a defense mechanisms against the threat posed by unstable free radicals.

The result of epidemiological study stated that one of the health benefits of drinking tea is that it can reduce the risk of esophageal cancer in men and women by up to 60%.

Another wonderful benefit from drinking tea is it is rich in natural fluoride and prevents tooth decay. It is important to avoid using sugar in tea for these benefits to be maximized. Tea catechins prevent growth of bacteria that also cause tooth decay and the formation of plaque.
Antioxidants in tea

Application of Acesulfame K in soft drink

Acesulfame K is the generic name for the potassium salt of 6-methyl-1, 2, 3-oxathiazine-4 (3H)-one-2,2, dioxide.

Acesulfame K was first approved for limited use by FDA in July 1988 and then additionally approved for use in beverages in 1998.

The relative of sweetness of acesulfame K varies from 100 to 200, depending on concentration and application.

Acesulfame is suitable for low calorie and diet beverages because of its good stability in aqueous solution even at low pH typical of diet soft drinks.

The maximum use level in soft drinks within European Union is 350 mg/l and therefore, it must be combined with other sweeteners to reach a sweetness level of 10° Brix equivalent.

If used by itself, acesulfame K can impart sweetness comparable to 8%-10% sucrose, but mixtures of acesulfame K with other intense sweeteners are more predominantly used of the sucrose-like taste these blends provide.

PepsiCo was the first soft drink company to use acesulfame K in their new PepsiONE soda, but it is now used in many brands of sodas, fruit drinks, and nutraceutical beverages in the United States.
Application of Acesulfame K in soft drink

Licorice in beverages

Native to southeastern Europe, the licorice root was used as something sweet to chew on and the black juice extract was taken as a refreshing drink by both the Greeks and Romans.

Licorice reached Europe via the Arab spice routes and in the 17th century, ground licorice was used to flavor cakes, desserts and drinks.

In the days of the pharaoh, licorice was used by the Egyptians to prepare a drink known as mai sus.

Tons of licorice were stored in the 3000 year old tomb of King Tut, apparently to prepare sweet drink for the king’s afterlife. And today licorice still in used to prepare of soft drinks during the fasting month in Egypt.

Licorice powder is put into a piece of cotton and soaked in water for two hours or more. To this strong, bittersweet liquid, more water should be added. It is a summer drink and said to be healthy for the stomach and respiration.

Licorice extract normally use in non-alcoholic beverages, cocktail mix and soft drinks. It is also used in food products such baked goods, candy and chewing gum.

Beverage makers use licorice as a foaming agent. The most common usage is to extract the juice of the root to flavor a variety of sweets and the Italian liqueur.

Licorice liqueurs are common in many bars but are not used in many cocktails.
Licorice in beverages

Acesulfame K

Acesulfame K
Acesulfame K is the generic name for the potassium salt of 6 methyl-1,2,3-oxathiazine-4(3H)-one-2.2.disoxide; it is a derivative of acetoacetic acid and was discovered by the German company in 1967.

In 1967 the Hoechst researcher Karl ClauB was conducting a research program aimed at the evaluation of substance which had found only limited interest until then.

When he reacted butyne and fluorosulfonyl isocyanate, he noticed taste originating from his finger, which was not caused by any known sweet substance.

Again, as was the case with other important sweeteners, the discovery of the sweetness was made accidently.

Properties
Acesulfame K is a white, non-hygroscopic crystalline; at room temperature solubility (270 g/l) in water, poor in organic solvent, but increases in solvent water mixtures.

It has no sharp melting point, but decomposes at about 225 degree C.

Acesulfame K is extremely stable in the solid state and even in the low pH environment of soft drinks.

Acesulfame K is similar on structure to saccharin, but about half as sweet.

Acesulfame K is not metabolized by the body. It is absorbed by the intestinal tract and quickly and completely executed.

Application in soft drinks: sensory
As with all intense sweeteners, sweetness potency of acesulfame K relative to sucrose decreases with increasing concentration and varies with the medium in which the sweetener is being tested and the method used for quantifying sweetness.

The taste profile of acesulfame K is generally considered to be superior to saccharin.

It has a rapid onset time but the sweetness quality is marred by a bitter astringent aftertaste that is particularly noticeable at higher concentrations.

Sweetness quality can be greatly improved by combining with other intense and bulk sweetness.

High levels of synergisms (30% and above) occur with aspartame and to a lesser extent with cyclamate, glucose, fructose and sucrose.
Acesulfame K

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