effect of sodium alginate coating on osmotic dehydration of guava

8/19/2019 Effect of Sodium Alginate Coating on Osmotic Dehydration of Guava

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Efect o Sodium AlginateCoating on Osmotic

Dehydration o GuavaName : Tou Joon Hau

Matric Number : BK12110372

Supervisor : Dr Tham Hen Jin

!"aminer : M#m Murni Su#an

$hairman : Dr !mma Sua%i


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&NT'(D)$T&(N

*ricu%ture+ ,-

&n#ustr.+ 3/-Services+ /-

GDP Malaysia 20! " COMPOS#$#O%& '( SEC$O)O* O)#G#%+,-

Source: https:ciaov%ibrar.pub%icationsresourcesthe4or%#4

5actboo6e%#s2012htm%


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&n#ustria% $rops 1 - 8oi% pa%m9 rubber9cocoa

*ricu%tura% ;oo# $rops 3,- 85ruits an#veetab%es

*ricu%tur

a%&n#ustr.

(ear Contri.ution o agriculture tototal GDP

200


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• ;ruits an# veetab%es are norma%%. hih%.perishab%e #ue to hih ater content

•

&nappropriate han#%in o5 post harvest 5ruits an#veetab%es i%% %ea# to un#esirab%e 5oo# %osses

Source: >ustavsson9 J9 $e#erber9 $9 Sonesson9 )9 (tter#?i69 ' van9 @ Me.bec69 * 82011

>%oba% ;oo# Aosses an# ;oo# aste Cresente# at the S*! ;((DE9 &nterpac69 DFsse%#or59>erman.: ;*(


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;oo# Creservation

Dr.in an# #eh.#ration

• conventiona% metho# to remove moisture

content o5 5oo# in or#er to pro%on itGsshe%5 %i5eoHih temperature nee# more ener.

o Time consumin process• (smotic Deh.#ration

o Cartia% remova% o5 ater


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Pro.lem Statement/

>uava has short she%5 %i5e

• Become 5u%%. ripe beteen 3 / #a.s at roomtemperature

(smotic Deh.#ration• (smotic so%ute upta6e into the 5oo# materia%

• aIect orano%eptic an# nutritiona%characteristics

$oatin prior to (smotic Deh.#ration

• 'e#uce osmotic so%ute upta6e


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Aim/

• Stu#. the eIect o5 so#ium a%inate coatinon osmotic #eh.#rate# uava 8PsidiumGuajava L.


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O.ectives/

• Stu#. the eIect o5 coatin con#ition on

osmotic #eh.#ration o5 uava samp%esan# mo#e%in such 6inetics

•

Determine the 1ater oss +1-& SolidGains +SG- and 13SG ratio o5 osmotic#eh.#rate# coate# an# uncoate# uava

• Determine !Iective DiIusion $oecient8Def o5 so%ute an# ater #urin osmotic

#eh.#ration o5 uava


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Sco4e o Study /

• $ommon uava 8Psidium Guajava L. as chosen 5or

the e"periment

• Samp%e uava as coate# ith the 5o%%oincon#ition:o$oncentration : 0/ 20 -

oDippin time : 0 300 s

• >uava samp%es ere then un#ero osmotic#eh.#ration process ith the 5o%%oin con#ition:o Sucrose $oncentration : 337,-

o Temperature : 3000 0$

o &mmersion time : 2=0 min


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Signi5cance o this Study /

• There is no stu#. on the eIect o5

concentration an# #ippin time o5e#ib%e coatin on osmotic #eh.#ration

• Hence9 in this or69 osmotic

#eh.#ration e"periment ere carrie#out on coate# an# uncoate# uava8Psidium Guajava L. ith so#ium

a%inate in or#er to stu#. the masstrans5er 6inetics b. var.in coatinconcentration an# #ippin time


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#$E)A$6)E )E7#E1

• $ommon >uava 8Psidium GuajavaL.


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!#ib%e ;i%ms an# $oatins


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(smotic Deh.#ration

• 'euire %itt%e ener.9 simp%e• $an be use as pretreatment prior to

other #r.in metho#s•

Cartia%%. remove ater content 5rom5oo#


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;actors aIectin (smotic

Deh.#ration

• Temperature

• $oncentration

•

T.pe o5 osmotic aent• *itation

• >eometr.

•

(peratin pressure• Crocess #uration


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Mathematica% Mo#e%in

• A9 S> an# AS> ratio i%% be#etermine

• Mass trans5er i%% be mo#e%accor#in to Ce%eGs euation


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Crevious stu#ies on #iIerent coatin

con#itions


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ME$8ODOOG(

*pparatus

• (ven 8Memmert9 )S*

• Hot C%ate Stirrer 8HB/02 Bibb.K

• Bea6er 8100 m% an# 200 m%

• Crecision Ba%ance 8*@L9 ;L4200i

• Measurin $.%in#er

$hemica%s

• So#ium *%inate

• $a%cium $h%ori#e

• $ommercia% ra#e sucrose


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Samp%e Creparation

• >uava as ashe#9 pee%e#9

#estone# an# s%ice# intopieces o5 / " 2 " 0/ cm


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Creparation o5 So#ium *%inate an#$a%cium $h%ori#e So%ution

• 0/ 2 - So#ium *%inate

• Heate# an# stir to ensure homoenie#so%ution

• Set asi#e an# coo% to room temperature

• 2 - $a%cium $h%ori#e


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$oatin prior to (smotic

Deh.#ration

• Samp%e #ip in so#ium a%inate 5or#iIerent time #uration9 ranes 5rom0s to 300s

• $oate# samp%e as then #ip inca%cium ch%ori#e so%ution 5or 30s 5orcross %in6in purpose

• The samp%e as then ashe# b.immersion in #isti%%e# ater 5or 30s


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;i" $oatin• Samp%es ere #rie# in a hot air oven 5or 10

minutes at 70o

$ to " the %a.er o5 coatin• 13/ ms


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(smotic Deh.#ration

Sucrose $oncentration : 337,-

Temperature : 3000 0$

&mmersion time : 2=0 min8Source: >an?%oo9 'ahman9 Ba6ar9 (sman9 @ Bima6r9 201=

eiht ratio : 1:10


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!"periment Set


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9A#:E%


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C'!A&M&N*' '!S)AT

S!T*

effect of sodium alginate coating on osmotic dehydration of guava

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