Sonication orqali Hops ekstraktlarini samarali ishlab chiqarish

Hops and hop extracts are essential ingredients for the production of beer. The alpha-acids a-caryophyllene (humulone) and beta-caryophyllene (humulene) are important flavour compounds, which give beer its bitterness and contribute to its aroma, foam structure, and microbiological stability. Ultrasonic extraction is a highly efficient technique to release the bioactive compounds from the hops cell matrix to produce a flavour-rich and full hop extract.

Ultrasonic Extraction of Bitter Acids from Hop

Ultrasonic extraction of bitter acids from hops is a highly efficient and reliable technique used in the brewing industry, flavour and fragrance production as well as in research facilities to efficiently and effectively extract compounds responsible for bitterness and flavour compounds from hops cones.

Ultrasonic extraction uses the working principle of acoustic cavitation. Acoustic or ultrasonic cavitation is generated by low-frequency ultrasound waves in liquids. The alternating high-pressure / low-pressure cycles of the ultrasound waves create minute cavitation bubbles in a solvent. The rapid formation and collapse of these bubbles generate intense local forces that disrupt cell walls and release target compounds, such as bitter acids, from the hop material. Ultrasonic cavitation is very effective to release bitter acids such as humulone, cohumulone, and adhumulone from hops. These compounds are best known as flavour compounds used in beer where they contribute to the bitterness and distinct taste profile of beer.
A major advantage of ultrasonic extraction is its efficiency and speed. Sonication significantly reduces extraction times compared to traditional methods, making it an attractive choice for breweries and flavour manufacturers.
Since the ultrasonic extraction process can be optimized by adjusting various parameters, including sonication time, temperature, solvent concentration, and the ratio of hop material to solvent, the process can be adjusted to the target flavour profile of the hops extract. Optimization ensures maximum bitter acid extraction while maintaining the desired beer flavour.
Maintaining proper temperature control during ultrasonic extraction is essential. Elevated temperatures can lead to the degradation of bitter acids and the formation of undesirable off-flavors.

Ultrasonic Full-Spectrum Hop Extracts

Ultrasonically prepared hops extracts are full spectrum extracts, which offer the full range of active ingredients of the hops cones. Besides the alpha-acids a-caryophyllene (humulone) and beta-caryophyllene (humulene), ultrasonic extraction also releases further terpenes such as linalool and farnesene as well as other phyto-chemicals such as polyphenols and flavonoids. Full spectrum extracts are valued for their so-called entourage effect.
During ultrasonic extraction, plant materials, such as hops and other herbs, are processed at mild temperatures, limiting thereby thermal degradation. Sonication allows the use of mild, safe, environmental-friendly solvents – avoiding the use of toxic solvents.
The high effectiveness of ultrasonic extraction allows even to produce hops extracts from spent hops. The intense ultrasonic extraction process releases the remaining photo-compounds from the spent hops and helps to deplete the spent hops from all valuable substances so that no bioactive substances are wasted.

Bitter Acids in Hops

Hop bitter acids are distinguished into α- and β-acids. Bitter α-acids are composed of three main components: n-humulone, ad-humulone and co-humulone. Likewise, bitter β-acids consist of n-lupulone, ad-lupulone and co-lupulone. For breweries and beer production, α-acids are the essential acid form. By boiling alpha-acids under weakly acidic conditions, the alpha-acids are isomerized and thereby transformed into iso-α-acids. By isomerization the poorly water-soluble alpha-acids are turned into a more soluble iso-form, which exhibits the characteristic organoleptic bitterness. The β-acids, which are even less water-soluble than the α-acids, are less important for brewery production as the beta-acids show a very low isomerization rate during wort boiling.
Besides its use as flavouring ingredient, hops is also known for its health-promoting properties, which include antioxidative, sedative, anti-inflammatory, anticarcinogenic, and estrogenic effects. For instance, xanthohumol, a prenylflavonoid found in hops, is known for its strong antioxidative effects. These natural hops substances are used in supplements and medicinal products to support health or to treat diseases.

Why Using Hops Extracts?

When used flavouring ingredient, extracts allow for very precise dosing of bitterness and aroma since hop extracts are standardized regarding specific amounts and compositions of alpha acids. This enables for producing the same flavour profile and thereby a continuously high-quality product fulfilling customer expectations.
When used as active ingredient in supplements and medicinal products, hops extracts offer a highly concentrated amount of bioactive substances, e.g. terpenes, flavonoids. Thereby, it is possible to ingest a high amount of the active photo-compund in order to achieve the targeted effect.

Gas chromatography analysis of ultrasonic hops extract prepared with ultrasonic homogenizer UP100H: β-caryophyllene oxide, α-caryophyllene, α-pinene, mycrene, limonene, α-caryophylene, and caryophylene oxide and others.

Ultrasonic Hops Extraction

Ultrasonically accelerated solvent extraction is an simple, rapid and save method for the extraction of bitter acids from hops. Being a low-temperature treatment, ultrasonic hop extraction gives high yields in a short process time, which are significant advantages in comparison to the conventional bitter acid extraction from hop.
Low processing temperatures, high yields, superior extract quality (i.e. full flavour / full spectrum extracts) and a very short processing time are the main advantages of ultrasonic hops extraction.
Ultrasonic Hop Extraction – Afzalliklari:

• To'liqroq ekstraktsiya
• yuqori hosil
• Full flavour profile
• Variety-specific aroma preserved
• Consistent bittering / flavouring
• Batch and Inline processing
• Xavfsiz va ishlatish oson
• Economical, Fast RoI

High Performance Ultrasonic Extractors

Hielscher Ultrasonics is long-time experienced in designing, manufacturing and suppling high-performance ultrasonic extractors for small to large industrial scale to renowned companies and research institutes worldwide. Ultrasonic extraction can be performed on any scale, from small laboratory setups to large-scale industrial systems, allowing manufacturers to tailor their hop extraction process to their production needs.
Hielscher ultrasonicators deliver high-power ultrasound, are robust and can easily run 24/7 under heavy load. This makes Hielscher ultrasonic extractors the trusted work horse in the food, pharma, and chemical industry.
All digital ultrasonic processors are equipped with a coloured touch-display, through which you can set and control the process parameters easy and precisely. On the built-in SD-card all process parameters are automatically recorded as soon as you turn the ultrasonic extractor on.
The sophisticated design of Hielscher’s batch and inline sonication setups is extensively tested and optimized for user-friendliness and high-quality output. Flow cell reactors are available at various sizes and with different geometries. The broad range of sonotrodes (ultrasonic probes) with various shapes, sizes, and lengths as well as additional accessories allow for the ideal configuration of your ultrasonic system in accordance to your extraction process and plant material.
Another advantage of Hielscher Ultrasonics’ industrial ultrasonic processors is the delivery very high amplitudes of up to 200µm, which can be easily and continuously run in 24/7 operation. For even higher amplitudes, customized ultrasonic sonotrodes are available. The precise control over the amplitude and the option of running very low to very high amplitudes enables for an optimal and efficacious process. The robustness of Hielscher’s ultrasonic equipment allows for 24/7 operation at heavy duty and in demanding environments.
Hielscher high-performance ultrasonic extractors for superior extracts!
Quyidagi jadvalda ultrasonikatorlarimizning taxminiy qayta ishlash quvvati ko'rsatilgan: