Kinetic analysis, mathematical modeling and quality evaluation of mint drying in greenhouse solar dryer

Daliran, Ali; Taki, Morteza; Marzban, Afshin; Rahnama, Majid; Farhadi, Rouhollah

doi:10.1016/j.tsep.2023.102252

Cited by 3 publications

(3 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To clarify, higher temperature generates a vapor pressure differential and a partial vapor pressure in the air at a certain temperature, which is one of the driving forces behind drying. Therefore, a higher temperature causes a greater driving force for heat transfer and accelerates the product's drying process (Daliran et al, 2023).This result was resembled with results by Al-Hamdani et al…”

Section: Moisture Content Evaluation Of Bottle Gourdsupporting

confidence: 88%

“…(2022) which conclude that the faster drying methods for drying fresh basil and mint is open sun followed by indirect solar dryer and shade drying. Moreover, Daliran et al (2023) showed that the open sun drying take less time to dry mint leaves with 4.4 h compared with the shade dryer which take 6 h.…”

Section: Moisture Content Evaluation Of Bottle Gourdmentioning

confidence: 99%

“…Higher moisture content decreased the lightness value due to a change in the spectral properties of light reflected from the dried sample (Özkan et al, 2003). According to Daliran et al (2023), the lightness of dried mint leaves with a shade dryer showed a lower difference from the lightness of fresh mint leaves compared to the sun drying and Greenhouse Solar Dryer (GSD). The* values of bottle gourds were consistently low and positive, although they increased with every drying technique.…”

Section: Color Change Of Bottle Gourdsmentioning

confidence: 99%

See 2 more Smart Citations

Drying characteristics and kinetics of bottle gourd using stand-alone indirect solar dryer

Al-Ghadani,

Al-Khayari,

Jayasuriya

et al. 2024

Front. Sustain. Food Syst.

View full text Add to dashboard Cite

Drying food is an effective method to preserve fruits and vegetables, increasing their shelf life and preventing germination. Bottle gourds, known for their high nutritional value, can rot quickly due to their high moisture content, causing biochemical and microbial changes. To improve shelf life, moisture can be removed to prevent microbial activity. Different drying methods are used to preserve gourd family vegetables for long periods and off-season. Indirect solar drying shields foods from UV rays, dust, insects, and other contamination by avoiding direct exposure. This study aimed to utilize an indirect solar dryer to research the potential for drying bottle gourds and conduct physicochemical analyses for the dried products to compare the drying techniques. In this experiment, different samples of bottle gourd slices were dried using an indirect solar dryer and compared with sun and shade drying. Under physicochemical properties, moisture content (MC), retention of color, thickness, and shrinkage of dried samples were analyzed and compared. The result showed that the time taken to reach 10% moisture was 13 h for samples dried with sun drying. While shade and indirect solar drying took 17 h. The Midilli-Kucuk model outperforms other approaches for drying bottle gourd, with the greatest R2 values (0.9967, 0.9950, 0.9936) and the lowest RMSE values (0.0182, 0.0220, 0.0277) for direct sun, shade, and indirect solar drying, respectively. The indirect sun dryer showed good color retention compared to the fresh bottle gourd samples with L* value of 44.08, b* value of 15.40 and a* value of 7.01. The volumetric shrinkage was 97.64% in the direct sun drying method after 15 h, which is higher compared to sun and shade dryers due to the effect of time and temperature. In addition, there was a significant difference (p-value <0.05) between the thickness of the three drying methods. The use of indirect solar drying methods can be highly recommended to get high-quality dried food with zero energy cost. For future studies it is recommended to enhance the function and design of the indirect solar dryer to speed up drying times and improve the quality of dried samples.

show abstract

Section: Moisture Content Evaluation Of Bottle Gourdsupporting

confidence: 88%

Section: Moisture Content Evaluation Of Bottle Gourdmentioning

confidence: 99%

Section: Color Change Of Bottle Gourdsmentioning

confidence: 99%

See 1 more Smart Citation

Drying characteristics and kinetics of bottle gourd using stand-alone indirect solar dryer

Al-Ghadani,

Al-Khayari,

Jayasuriya

et al. 2024

Front. Sustain. Food Syst.

View full text Add to dashboard Cite

show abstract

Drying kinetics (mathematical modeling) and quality evaluation of herbal leaves (Adulsa and Durva) dried in small‐scale greenhouse solar dryer (GHSD): Experimental investigation and comparative analysis

Dhande,

Agarwal,

Agarwal

2024

J Food Process Engineering

View full text Add to dashboard Cite

The study presents the performance of a small‐scale greenhouse solar dryer (GHSD) to demonstrate hygiene and superiority over traditional methods for medicinal Adulsa and Durva leaves. The GHSD dryer lowered the initial moisture of Adulsa leaves from 73.99% (w.b.) to the final 10.63% (w.b.) under natural and forced convection in 3 and 2.5 h, respectively. Similarly, the initial moisture of Durva leaves was reduced from 67.33% (w.b.) to 11.65% (w.b.) under natural and forced convection in 2.75 and 2.5 h, respectively. Furthermore, mathematical modeling with non‐linear regression was implemented to characterize the drying of Adulsa and Durva leaves, which showed that Midilli–Kucuk and Modified Midilli were the most superior fits for reporting the drying of Adulsa leaves in GHSD and open sun drying, respectively, whereas Verma and Midilli–Kucuk models were superior fits for characterizing the drying of Durva leaves in GHSD and open sun, respectively. Furthermore, the quality of the dried Adulsa and Durva leaves was evaluated, where total phenolic content (TPC) and total flavonoid content (TFC) values were marked higher in the leaves dried by the GHSD as compared to open sun drying for both Adulsa and Durva leaves. Moreover, during antioxidant analysis, the IC50 values among the leaves dried in GHSD were recorded to be greater for the natural convection greenhouse solar dryer (NCGHSD) for both Adulsa and Durva (40.67 and 122.24 μg/mL) compared to open sun drying (101.88 and 158.20 μg/mL). A quality assessment was performed on dried Adulsa and Durva leaf samples, and they exhibited appropriateness for pharmaceutical industry drug production.Practical applicationsGreenhouse solar dryer is an eco‐friendly, sustainable, clean, and hygienic way to dry herbs and medicinal plants. The greenhouse solar dryer can shorten the drying time by 50%–60% compared to natural stand in the sun (open sun drying) and improve the quality of the dried herbs, medicinal plants, and reduce the decay rate of the dried products. These leaves can be best suited for Ayurveda medicine industries for herbal powder (Churna). Being an economically advantageous greenhouse solar dryer improves the shelf life of the dried leaves, reduces their density, and lower transportation costs, leading to boost farmers' income in herbal farming and nutritional security.

show abstract

Investigation on the effect of operation of solar dryer technology according to the drying characteristic of dried product

Rahman,

Sulistyo,

Utomo

et al. 2024

Eureka: PE

View full text Add to dashboard Cite

The application of solar dryer through greenhouse (GH) model as drying method for crops-based product is extremely important in industrial scale agriculture, especially in developed country. The drying model is considered environmentally friendly since it utilizes solar power as the main drying energy. However, the fundamental operational aspect of the basic GH is less discussed according to the drying mechanism of the dried product. In this work, three small-scale drying model are evaluated: open drying (OD), natural convection GH (NCGH), and forced convection GH (FCGH). The drying product is potato, which can be taken as an essential agricultural product in modern world. The OD model has the lowest mass loss rate which less than 50 % of the water from product can be evaporated. The operation of both GH is satisfactory, resulting more than 60 % moisture evaporation. The drying characteristic indicates the two-step failing rate which makes the mass loss fluctuation from the process. The highest mass loss is observed during the constant rate period around 21 % for FCGH and 18 % for NCGH. In addition, the detailed analysis on the effect of each process is discussed in this work. For example, the presence of hair-like structure and the movement of the pith of dried potato during the process. Also, a higher drying rate from NCGH and FCGH initiate the gelatinization and compartmentalization, resulting a substantial water evaporation of the product. It confirms the important correlation of the drying process and water diffusion mechanism of the dried product. The finding from this study can be taken as a vital reference for improving the operation of GH solar dryer

show abstract

Kinetic analysis, mathematical modeling and quality evaluation of mint drying in greenhouse solar dryer

Cited by 3 publications

References 46 publications

Drying characteristics and kinetics of bottle gourd using stand-alone indirect solar dryer

Drying characteristics and kinetics of bottle gourd using stand-alone indirect solar dryer

Drying kinetics (mathematical modeling) and quality evaluation of herbal leaves (Adulsa and Durva) dried in small‐scale greenhouse solar dryer (GHSD): Experimental investigation and comparative analysis

Investigation on the effect of operation of solar dryer technology according to the drying characteristic of dried product

Contact Info

Product

Resources

About