Continuous Vacuum Dryer for Energy Saving

Hayashi, Hiromichi; Kumazawa, Eitaro; Saeki, Yukihiro; Lahicka, Y.

doi:10.1080/07373938308916783

Cited by 8 publications

(3 citation statements)

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“…However, these disadvantages can possibly be overcome by the use of a continuous vacuum dryer. Hayashi et al (35) have successfully developed a continuous vacuum dryer whose cost is one‐third of that of freeze drying. This continuous vacuum dryer is able to dehydrate material to 1−4% moisture (wet basis) at 40 °C within 5−10 min.…”

Section: Alternative Drying Processes For Lactic Acid Starter Culturementioning

confidence: 99%

Alternative Drying Processes for the Industrial Preservation of Lactic Acid Starter Cultures

Santivarangkna

Kulozik

Foerst

2007

Biotechnology Progress

272

177

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The preservation of lactic acid starter cultures by alternative drying processes has attracted increasing attention due to the high costs and energy consumption of freezing and freeze drying. This review thus aims to provide a survey regarding the state of knowledge of starter culture production at high levels of viability. The results from numerous studies on various drying processes and lactic acid bacteria are summarized. The alternative drying processes considered, such as spray drying, fluidized bed drying, and vacuum drying, are mainly of industrial interest. The features, advantages, and disadvantages of these drying processes are described. In conclusion, the important factors that need to be considered, standardized, or optimized to achieve high levels of viability include intrinsic tolerance of cultures, growth media and conditions, stress induction, cell harvesting conditions, protective agents, rehydration conditions, enumeration of cells, and storage conditions.

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Section: Alternative Drying Processes For Lactic Acid Starter Culturementioning

confidence: 99%

Alternative Drying Processes for the Industrial Preservation of Lactic Acid Starter Cultures

Santivarangkna

Kulozik

Foerst

2007

Biotechnology Progress

272

177

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“…Vacuum drying is suitable for heat sensitive probiotics because drying takes place at lower temperatures, and oxidation reaction can also be minimized, while disadvantage is batch operation and longer drying time which can be minimized by using a continuous vacuum dryer where cost is one-third of a freeze dryer, and the material can be dried at 1–4% moisture level at 40°C within 5–10 min [223]. …”

Section: Formulation Technology For Microencapsulation Of Probioticsmentioning

confidence: 99%

Development of Microencapsulation Delivery System for Long-Term Preservation of Probiotics as Biotherapeutics Agent

Solanki

Pawar²,

Dm³

et al. 2013

BioMed Research International

150

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The administration of probiotic bacteria for health benefit has rapidly expanded in recent years, with a global market worth $32.6 billion predicted by 2014. The oral administration of most of the probiotics results in the lack of ability to survive in a high proportion of the harsh conditions of acidity and bile concentration commonly encountered in the gastrointestinal tract of humans. Providing probiotic living cells with a physical barrier against adverse environmental conditions is therefore an approach currently receiving considerable interest. Probiotic encapsulation technology has the potential to protect microorganisms and to deliver them into the gut. However, there are still many challenges to overcome with respect to the microencapsulation process and the conditions prevailing in the gut. This review focuses mainly on the methodological approach of probiotic encapsulation including biomaterials selection and choice of appropriate technology in detailed manner.

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“…These improvements have lowered energy consumption by as much as 30%. Other drying technologies showing promise include acoustic drying (Chowdhury 1984;Muralidhara 1985;Swientek 1986), drying in the presence of superheated steam (Amelot and Gauvin 1986) and drying under vacuum (Hayashi 1983).…”

Section: Introductionmentioning

confidence: 99%

PERFORMANCE of HEAT RECOVERY SYSTEM FOR A SPRAY DRYER

Donhowe

Amundson

Hill

1990

J Food Process Engineering

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A factorial experimental design was used to study the effect of exhaust heat recovery, air flow rate and outlet temperature on the energy consumption of a spray dryer. A commercial‐scale cocurrent flow dryer with pressure atomization was used to dry 15 wt% sodium sulfate solutions. the inlet air to the dryer was preheated by using a shell‐and‐tube heat exchanger to recover energy from the exhaust air. Heat recovery reduced the energy consumption of the dryer by 12–28%, with the largest reduction occurring at the high levels of air flow rate (13,000 kg/h) and outlet temperature (104°C). the energy consumption of the dryer was lowest when heat was recovered at the low air flow rate (6500 kg/h) and low outlet temperature (82°C). No problems were encountered with fouling or cleaning of the heat exchanger. the total pressure drop across the heat exchanger varied from 0.05–0.2 kPa depending on the air flow rate. This additional flow restriction resulted in an estimated 8% decrease in air flow rate but had negligible effect on energy consumption. the warm‐up time and the space required by the heat recovery unit were insignificant factors for this dryer. the payback period of the heat recovery system was estimated as 4.1–5.4 years with a rate of return of 21–28%.

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Continuous Vacuum Dryer for Energy Saving

Cited by 8 publications

References 0 publications

Alternative Drying Processes for the Industrial Preservation of Lactic Acid Starter Cultures

Alternative Drying Processes for the Industrial Preservation of Lactic Acid Starter Cultures

Development of Microencapsulation Delivery System for Long-Term Preservation of Probiotics as Biotherapeutics Agent

PERFORMANCE of HEAT RECOVERY SYSTEM FOR A SPRAY DRYER

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