THE PRODUCTION OF A DRIED AVOCADO (PERSEA AMERICANA) POWDER Saheeda Mujaffar and Tsai-Ann Dipnarine
Ғылым және технология
This work investigated the technique of vacuum freeze drying of avocado pulp (Persea americana var. Pollock) to produce a dried cake which could be blended into a powder to be used in various food applications. Frozen, mashed avocado pulp samples were dried in a Benhay SB-4 vacuum freeze dryer. For comparison, fresh pulp samples were also oven-dried in a Unitemp drying cabinet at 60°C. Samples were dried until constant weight was achieved after which they were blended into powders and analysed. Analyses included determination of moisture content, water activity, pH and total soluble solids content, colour assessment, proximate analyses, physical properties, rehydration behaviour and a preliminary storage assessment. Drying data was used to generate rate and Moisture Ratio (MR) curves and thin layer models applied to the MR data. The moisture content and water activity values of the fresh pulp averaged 3.16 g H2O/g dry matter (76.0% wet basis) and 0.889, respectively. Samples were successfully dried in the freeze dryer to an average moisture content of 0.02 g H2O/g dry matter (2.1% wet basis) after 72h, and a final average water activity of 0.356. Drying occurred in the falling rate period and the drying rate constant (k1) averaged 0.2496 1/h. The Verma model was found to best fit the Moisture Ratio (MR) data. Compared with oven-dried samples, the freeze-dried samples dried to lower equilibrium moisture values, did not show any signs of browning and was higher in protein and fat content. The freeze-dried ‘cake’ was easier to blend to a light, free-flowing powder which easily rehydrated to a form which closely resembled fresh avocado puree. Freeze drying is therefore an attractive option to produce a high-quality Pollock avocado powder, without the use of heat or the application of chemical preservatives to preserve colour.
Пікірлер: 18
Excellent,
@dr.saheedamujaffar3059
3 жыл бұрын
Thank you!
Excellent Presentation. An interesting and innovative way to preserve this delicious fruit
@dr.saheedamujaffar3059
3 жыл бұрын
Thank you!
Hi Sahida, Nice to see you here, I like your this Avocado proses video and very helpful for me. I need more knowledge Avocado pulp proses. Can you help me? My Name is Samir Patel,
Hi, thanks to see this presentation, I like your this Avocado proses video and very helpful for me. actually we have CSR to share thousands avocado seed to the farmer in Indonesia and now we thinking about how to collect their product and how to process to be powder and want to sell it. I need more knowledge Avocado pulp proces. Can you help me?
Thanks
@dr.saheedamujaffar3059
3 жыл бұрын
Very welcome!
Nice
great work!!! Can we use ripe avacado instead of mellow avacado? Firstly cut a peices and dry then we can make powder from dried pieces. I think color variation are less in this method also. Just an idea😀 and i would like to know that what are the uses of avacado powder?
@dr.saheedamujaffar3059
3 жыл бұрын
Thank you! For very ripe avocado definitely use puree instead of slices!
May I ask you please, I tried to extract avocado oil using the cold pressed method, letting the avocados air-dry, but when they were totally dried (black), the smell was so unpleasant and so of course the extracted oil also smelled and tasted unpleasant. How to solve this?
@MattTrevatt
Жыл бұрын
Convert to paste and dry in a dehydrator.
@annuann7265
6 ай бұрын
there is a technology called DIC (Instant controlled pressure drop). This can be paired with extraction methods.
Didnot need a history. Can avocados be made into powder ?
Greetings Sahida , i would really like to get in contact with you , via any platform. At the end of your video, you mentioned that we can reach you by email. please confirm and provide best email address that i can communicate with you. thank you.
@ryanmckinnon3418
3 жыл бұрын
That makes two of us. I am in Guyana and own an avocado farm so abundance of fruit to do further testing on this interesting idea
@dr.saheedamujaffar3059
3 жыл бұрын
Hello and thanks for your interest in this work. I am on LinkedIn and Academic platforms ResearchGate and Academia.edu.