ABSTRACT Mango peel a by product of the mango pulp industry is rich in nutrients but with high moisture content Drying is indicated to stabilize the residue and use of a drum dryer is a little studied alternative The present study evaluated the application of this technology for mango peels investigating the influence of process conditions The potential of
Drum drying came into use in the 1990s before spray drying techniques were developed Spray drying exposes food with high moisture content to hot air inside a machine that rapidly removes water These newer machines permit temperature adjustments for different types of foods and the size of particles desired
Q How is the drying process in a rotary drum dryer controlled A The drying process in a rotary drum dryer can be controlled through various means One standard method is to adjust the temperature of the drying air and the airflow rate This allows for precise control over the evaporation rate and the moisture content of the dried material
On the other hand Kaveh et al 2020 made a research on drying of green peas in an experimental rotary dryer with electric heater considering the drying air temperature between 40 °C and 70 °C and the rotational speed of the rotary drum 5 rpm and 15 rpm [21] The results of this work showed exergy efficiency values between % 40
The drying temperature time cost and energy consumption are also lower in this case but thermal efficiency and product s quality are higher than conventional drying technologies like drum
Drum drying at 100 110 and 120 °C were very fast processes that required short drying times 422 s 400 s and 257 s respectively to reach low moisture contents and g water/100 g peel respectively
The slurry or paste is fed through a pendu lum nozzle or through a header with multiple nozzles on to the nip of two steam heated drums counter rotating toward each other forming a boiling pool
This work studied the effect of drum rotation frequency drum temperature and water to pulp ratio in a double drum drier on the content of sulforaphane glucoraphanin total phenolic compounds ascorbic acid and antioxidant activity of broccoli pulp through a multilevel factorial design with one replicate Drum drying conditions did not significantly affect
This technology is capable of handling both granular and filamentous materials [7] To date drum drying research has mainly focused on investigating the distribution of water and temperature inside the material optimizing the drying process conditions and ensuring product quality Drying is a complex process involving moisture and heat transfer
Drum drying along with spray drying thickness and initial temperature of the wet slurry Overall this work demonstrates the potential of model based approaches to the design and optimisation of more sustainable and efficient industrial drying technologies in the food sector which can help in the achievement of short/medium term energy
1 Introduction Drying is a widely applied technique in food industry to reduce moisture content and extend product shelf life Drying facilitates packaging transportation and storage of foods by reducing weight and volume of the product Qiu et al 2018 Although many types of drying techniques exist one can distinguish two main categories convective and
Drying temperature and residence time Determine the ideal drying temperature for your material based on its characteristics Consider the required residence time which is the duration the material needs to spend in the drum dryer for effective drying
Some of the typical drying methods used for food products are sun drying tunnel dryer spray drying drum dryer freeze drying microwave drying and fluidized bed drying
The speed of the drum rotation the temperature of the drying air and the design of the lifting flights can be adjusted to optimize the drying process for different materials and desired moisture levels2 Different Types of Rotary Drum Dryers Rotary dryers come in various configurations to accommodate different drying needs
However freeze dryer drum dryer natural sun dryer and other processes to dry the biomass can be also used [6 7 8] Although this method is widely used in microalgae biomass drying the high temperature of the drum causes degradation of quality of the dried product; for this reason this method is used to produce raw materials for
The drum drying temperature was varied 110 °C 120 °C and 130 °C and unheated riceberry flour was used as the control The results showed that all pregelatinized riceberry flour samples had lower p ≤ L value but higher p ≤ a and b values than the control The
As the drying temperature rises heat is transferred from the drying medium to the material surface When the temperature of the material surface increases the wet component evaporates to form an internal and external humidity gradient and the internal wet component is transferred to the material surface for evaporation Drum drying for
Drum drying is a well known drying technique commonly used in the food industry to produce powders out of a liquid or a paste The temperature of drums and casing was set to 80 °C at a pressure of 150 mbar drum rotation speed to rpm and gap between both drums to mm to ensure proper drying and removal of the solvent The dried
Purple sweet potato PSP is a rich source of anthocyanins but the anthocyanin content and color can be affected by the drying method and processing condition Response surface methodology RSM with a Box Behnken design BBD was used to investigate the effects of citric acid CA concentration steam pressure SP and rotation speed DS on the
Drum drying is a continuous indirect drying process As the drum body rotates it is heated on the inside by Heating medium temperature 120 190 °C Drying time Between 2 seconds and 2 minutes Particle size for wet product 5 Our mission is to enable our customers to achieve
The problem defines optimal steam temperature and optimal rotation speed that minimises the energy demand of the dryer operation for a range of operating conditions that considered different
3 The Dantoaster drum dryer is designed for high temperature grain drying sterilisation gelatinisation and toasting of a wide range of grain types Drying Product Lineup Cimbria continuous flow horizontal and drum dryers are engineered for quality and efficiency The lineup includes a complete range of fans heaters and control panels
R Effect of drum drying temperature on drying kinetic and polyphenol contents in pomegranate peel Journal of Food Engineering 2017 doi / This is a PDF file of an unedited manuscript that has been accepted for publication As a service to our customers we are providing this early version of the manuscript
