Pulsed electric field (PEF) technology uses short, intense electric pulses to non-thermally pasteurize liquids and semi-liquid foods. PEF systems generate high voltage pulses between electrodes to irreversibly break down microbial cell membranes. PEF processed foods maintain fresh qualities like flavor, color and nutrients since no heat is used. While PEF can extend shelf-life, products are generally refrigerated for safety or quality. PEF is a promising alternative to thermal pasteurization for heat-sensitive foods.
Pulsed Electric Field (PEF) applications can be utilised to achieve disintegration of biological tissues or microbes. Various applications have been identified such as improvement of mass transfer during extraction or drying as well as gentle food preservation. The first commercial applications of the technique have been achieved. By development of equipment based on state of the semiconductor, equipment reliability and cost effectiveness of the equipment has been improved. The technology is heading for wider industrial application.
Pulsed electric field (PEF) processing is an emerging non-thermal food preservation technology. PEF technology is established on the utilization of electric fields to remove food-borne pathogens and to subjugate the spoilage microorganisms in foods. This technology is notably acknowledged for its capability to amplify the mean life of food products without the utilization of heat also preserving the quality aspects such as sensory and nutritional attributes, together with enabling the safety of food products
Pulsed Electric Field (PEF) applications can be utilised to achieve disintegration of biological tissues or microbes. Various applications have been identified such as improvement of mass transfer during extraction or drying as well as gentle food preservation. The first commercial applications of the technique have been achieved. By development of equipment based on state of the semiconductor, equipment reliability and cost effectiveness of the equipment has been improved. The technology is heading for wider industrial application.
Pulsed electric field (PEF) processing is an emerging non-thermal food preservation technology. PEF technology is established on the utilization of electric fields to remove food-borne pathogens and to subjugate the spoilage microorganisms in foods. This technology is notably acknowledged for its capability to amplify the mean life of food products without the utilization of heat also preserving the quality aspects such as sensory and nutritional attributes, together with enabling the safety of food products
HPP is one of the food preservation method. High Pressure Processing is a non-thermal, cold processing technique in which the food in its final flexible packaging is subjected to high levels of hydrostatic pressure, inactivating its microorganisms, extending the shelf life and guaranteeing the food safety of the product.
Radio frequency processing and Microwave heating in food processing prakashsp13
radio frequency and microwave heating ; these slides are explain about its principle and working mechanism ,application in food processing and its advantages .
Non thermal processing of food- Pulsed electric field and visible lightT. Tamilselvan
In this presentation i gave an intro to non thermal processing methods in food and their advantages and disadvantages and have brief working of Pulsed electric field and pulsed visible light over other methods.
Hydrostatic pressure processing involves the use of high water pressure in a special pressure vessel to kill the bacteria but preserve texture, nutrients, and color of food.
You can read more about pasteurization here https://agritimps.com/milk-pasteurization-101
HPP is one of the food preservation method. High Pressure Processing is a non-thermal, cold processing technique in which the food in its final flexible packaging is subjected to high levels of hydrostatic pressure, inactivating its microorganisms, extending the shelf life and guaranteeing the food safety of the product.
Radio frequency processing and Microwave heating in food processing prakashsp13
radio frequency and microwave heating ; these slides are explain about its principle and working mechanism ,application in food processing and its advantages .
Non thermal processing of food- Pulsed electric field and visible lightT. Tamilselvan
In this presentation i gave an intro to non thermal processing methods in food and their advantages and disadvantages and have brief working of Pulsed electric field and pulsed visible light over other methods.
Hydrostatic pressure processing involves the use of high water pressure in a special pressure vessel to kill the bacteria but preserve texture, nutrients, and color of food.
You can read more about pasteurization here https://agritimps.com/milk-pasteurization-101
www.foodtechblog.in
what is pulsed electric field ,why process food,history,principle of pulsed electric field,components,application of pulsed electric field,advantages of pulsed electric field,disadvantages of pulsed electric field.
High voltage pulse technique or High intensity pulsed electric field processing involves the application of electric pulses of high voltage
20-80 kV/cm to the food placed between two electrodes.
The applied electric field create a pores on the cell membrane, thus the phenomenon known as Electroporation or electropermeabilization.
The effect of Electroporation can be divided into four steps:
An increase in the transmembrane potential
Pore formation
Evolution of the number and size of the pores
Pore resealing
High-intensity pulsed electric field(PEF) processing involves the application of pulses of high voltage(typically 20-80 kV/cm) to foods placed between two electrodes.
It is an efficient non-thermal food processing technique using short, high-voltage pulses.
These pulses induce poration of plant, animal, and microbial cells, leading to cell disintegration and microbial inactivation.
Products have a longer shelf life whilst maintaining better nutritional value than traditional food processing techniques.
Recent Advances in Dairy Industry -Chirag Prajapati.pptxChirag Prajapati
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FDA - kinetics of microbial inactivation for alternative food processing tech...Wouter de Heij
More information on PEF and PEF 2.0 (PurePulse) can be found on:
http://www.purepulse.eu or twitter @pure_pulse
http://en.topwiki.nl/index.php/PurePulse_-_PEF_2.0
and pinterest: http://pinterest.com/toptechtalks/purepulse-pef-2-0/
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Hamdard Laboratories (India), is a Unani pharmaceutical company in India (following the independence of India from Britain, "Hamdard" Unani branches were established in Bangladesh (erstwhile East Pakistan) and Pakistan). It was established in 1906 by Hakeem Hafiz Abdul Majeed in Delhi, and became
a waqf (non-profitable trust) in 1948. It is associated with Hamdard Foundation, a charitable educational trust.
Hamdard' is a compound word derived from Persian, which combines the words 'hum' (used in the sense of 'companion') and 'dard' (meaning 'pain'). 'Hamdard' thus means 'a companion in pain' and 'sympathizer in suffering'.
The goals of Hamdard were lofty; easing the suffering of the sick with healing herbs. With a simple tenet that no one has ever become poor by giving, Hakeem Abdul Majeed let the whole world find compassion in him.
They had always maintained that working in old, traditional ways would not be entirely fruitful. A broader outlook was essential for a continued and meaningful existence. their effective team at Hamdard helped the system gain its pride of place and thus they made an entry into an expansive world of discovery and research.
Hamdard Laboratories was founded in 1906 in Delhi by Hakeem Hafiz Abdul Majeed and Ansarullah Tabani, a Unani practitioner. The name Hamdard means "companion in suffering" in Urdu language.(itself borrowed from Persian) Hakim Hafiz Abdul Majeed was born in Pilibhit City UP, India in 1883 to Sheikh Rahim Bakhsh. He is said to have learnt the complete Quran Sharif by heart. He also studied the origin of Urdu and Persian languages. Subsequently, he acquired the highest degree in the unani system of medicine.
Hakim Hafiz Abdul Majeed got in touch with Hakim Zamal Khan, who had a keen interest in herbs and was famous for identifying medicinal plants. Having consulted with his wife, Abdul Majeed set up a herbal shop at Hauz Qazi in Delhi in 1906 and started to produce herbal medicine there. In 1920 the small herbal shop turned into a full-fledged production house.
Hamdard Foundation was created in 1964 to disburse the profits of the company to promote the interests of the society. All the profits of the company go to the foundation.
After Abdul Majeed's death, his son Hakeem Abdul Hameed took over the administration of Hamdard Laboratories at the age of fourteen.
Even with humble beginnings, the goals of Hamdard were lofty; easing the suffering of the sick with healing herbs. With a simple tenet that no one has ever become poor by giving, Hakeem Abdul Majeed let the whole world find compassion in him. Unfortunately, he passed away quite early but his wife, Rabia Begum, with the support of her son, Hakeem Abdul Hameed, not only kept the institution in existence but also expanded it. As he grew up, Hakeem Abdul Hameed took on all responsibilities. After helping with his younger brother's upbringing and education, he included him in running the institution. Both brothers Hakeem Abdul Hameed and Hakim Mohammed
Vietnam Mushroom Market Growth, Demand and Challenges of the Key Industry Pla...IMARC Group
The Vietnam mushroom market size is projected to exhibit a growth rate (CAGR) of 6.52% during 2024-2032.
More Info:- https://www.imarcgroup.com/vietnam-mushroom-market
Roti Bank Hyderabad: A Beacon of Hope and NourishmentRoti Bank
One of the top cities of India, Hyderabad is the capital of Telangana and home to some of the biggest companies. But the other aspect of the city is a huge chunk of population that is even deprived of the food and shelter. There are many people in Hyderabad that are not having access to
Roti Bank Hyderabad: A Beacon of Hope and Nourishment
pulse electric field
1.
2. PULSED ELECTRIC
FIELD
Pulse:-
A pulse is a single disturbance that moves
through a medium from one point to the next
point.
A disturbance is in some identifiable medium.
Energy is transmitted from place to place, but the
medium does not travel between two places.
3. What is pulsed electric
field?
Pulsed electric field (PEF) used short electric
pulses to preserve the food.
Pulsed electric field (PEF) treatment is an
innovative and promising method for non-thermal
processing of foodstuff.
It is suitable for preserving liquid and semi-liquid
foods removing micro-organisms and producing
functional constituents.
Examples:- milk, fruit juices, soup, egg etc.
4. Fundamentals of PEF
PEF : Generation of very high intensity electric pulses
(up to 15kV), for a very short duration of time (μs)to
inactivate microorganisms
6. About of PEF
It is one of the most appealing technology due to
:-
-short treatment time(typically below 1 second).
-reduced heating effect.
-energy lost during heating food is minimized.
-for fresh-like characteristics of food, along with
high sensorial quality and nutrient content
7. How does this technology benefit
consumers ?
PEF processing offers high quality fresh-like liquid
foods with excellent flavor, nutritional value, and shelf-
life.
Since it preserves foods without using heat, foods
treated this way retain their fresh aroma, taste, and
appearance.
8. Components of PEF
– Pulse generator
High voltage power supply
HV transformer
Capacitor (storing energy)
Switching devices
– Fluid handling system
Pumping mechanism (batch or continuous)
Treatment chambers
– Cooling mechanism
– Oscilloscope (to measure the changing of voltage with
time)
– Computer
9.
10.
11.
12.
13. How does PEF work to inactivate microorganism
PEF technology is based on a pulsing power delivered to the
product placed between electrodes by high voltage pulses in the order
of 20–80 kV (usually for a couple of microseconds).
The equipment consists of a high voltage pulse generator and a
treatment chamber with a suitable fluid handling system and
necessary monitoring and controlling devices.
Food product is placed in the treatment chamber, either in a
static or continuous design, where two electrodes are connected
together with a nonconductive material to avoid electrical flow
from one to the other
Generated high voltage electrical pulses are applied to the
electrodes, which then conduct the high intensity electrical pulse
to the product placed between the two electrodes.
The food product experiences a force per unit charge, the so-
called electric field, which is responsible for the irreversible cell
membrane breakdown in microorganisms.
14. This leads to dielectric breakdown of the microbial cell
membranes and to interaction with the charged molecules of
food.
Hence, PEF technology has been suggested for the
pasteurization of foods such as juices, milk, yogurt, soups, and
liquid eggs.
15. How are PEF processed foods stored ?
PEF pasteurized products currently are stored
refrigerated.
In some cases (for example, milk), this is
necessary for safety (to prevent the growth of
spores in low-acid foods).
For acid foods, refrigeration is not necessary for
microbial stability, but is used to preserve flavor
quality for extended periods of time.
16. The economics of PEF
processing ..
PEF is an energy efficient
process compared to thermal
pasteurization.
The PEF processing would add
only $0.03–$0.07/L to final food
costs.
A commercial-scale PEF system
can process between 1,000 and
5,000 liters of liquid foods per
hour and this equipment is
scalable.
17. To Obtain Safe and Healthy
Shelf-Stable Liquid Foods
The shelf-life of a PEF processed product
In general, the shelf-life
of PEF-treated and thermally
pasteurized foods is comparable.
PEF pasteurization kills microorganisms
and inactivates some enzymes
and, unless the product is acidic,
it requires refrigerated storage.
18. For heat-sensitive liquid foods where thermal
pasteurization is not an option (due to flavor, texture,
or color changes), PEF treatment would be
advantageous.
19. The integration of continuous PEF Processing
System ..
An integrated PEF system consists of a fluid handling
unit, high voltage pulse generator, PEF treatment
chambers, and packaging machine.
The fluid handling unit delivers stable, uniform flow
with sterilize-in-place (SIP) and clean-in-place (CIP)
functions.
The pulse generator supplies high voltage pulses into
foods flowing through PEF treatment chambers.
Treated foods are packaged continuously.
20. What is a PEF treatment
chamber ?
A PEF treatment chamber consists of
at least two electrodes and insulation
that forms a volume, i.e., PEF treatment
zone, where the foods receive pulses.
The electrodes are made of inert
materials, such as titanium .
23. Is commercial scale equipment available ?
In the United States, the first commercial scale
continuous PEF system is installed at The Ohio State
University’s Department of Food Science and
Technology.
This PEF system processes volumes ranging from 500
to 2,000 liters per hour.
Is PEF equipment safe for the environment?
Yes, this process uses ordinary electricity. The facility
meets electrical safety standards and no harmful
environmental by-products are produced.
24. Limitations :-
No effect on enzymes and spores
Difficult to use with conductive materials
Only suitable for liquids or particles in liquids
Only effective in combination with heat
Products of electrolysis may adversely affect foods
Safety concerns in local processing environment
Energy efficiency not yet certain
May be problems with scaling-up process
25. Engineering Principles
C0=τ/R=τσA/d
τ=pulse duration (s)
R=resistance (Ω)
σ=conductivity (S/m)
d= gap between electrodes (m)
A=area of electrode (m2)
Q=0.5 C0 V2
Q=energy stored in capacitor (J/m3)
C0= Capacitance (F)
V= charging voltage