Why Dextranase L ‘Amano’?
Technical presentation
Apr-13
2 points to consider!
• Powerful! (very high endo activity)
-> Dextranase L ‘Amano’ works rapidly and
efficiently on Dextran during the process
-> Dextranase L ‘Amano’ dosage can be adjustable at
the factory depending on the purpose
• PURE! (very high purity)
-> Dextranase L ‘Amano’ helps better crystallization
How powerful??
Dextran
higher DP7
DP6
DP5
DP4
DP3
DP2
DP1
The balance of sugar componentｓ,
10,000 ppm Dextran, after 50 oC, 2ppm DextranaseL treatment.
Amount of sugar components (%)
100
80
60
40
20
0
0
5
10
15
20
25
30
time (min)
Dextranase L ‘Amano’ •Very quick Dextran hydrolysis
•DP2 and DP3 production
Tangible Advantages
•
•
•
•
•
Better crystalized sugar
Gain better yield
Rapid reduction of viscosity
Higher productivity in the capacity
Shorter process time
Other advantages
• Easier maintenance of the equipment
• Prevents clogging in the event of interruption
of the process.
• Energy saving
• Lower content of Dextran in waste water
What we observed?
Voices from the market…
• Quality improvement!
– Lower dextran content in the process
-> less consumption of other chemicals
-> lower quantity of waste water
– Better particle distribution (medium size) of raw sugar
– Better and solid crystal in raw sugar
• Yield improvement
– Raw sugar yield increase up to 5-7%
• Save energy
– Lower consumption of calcium carbonate
– Lower quantity of waste water
– Lower energy against raw sugar production / Mt
• Trouble shooting! (to add Dextranase just before re-start of the process)
– Longer life of filter cloth
– Lower sugar loss
Crystallization
•
Better crystal
Irregular crystal
Decrease of irregular crystals, increase of medium size crystals.
Dextranase 2ppm
Ca(OH)2 2-4% less
Cleaning
Delivery
Cutting
DDS
Preliming
Diffusion juice
Preliming juice
145→30ppm
CO2
Liming
1st
Carbonation
heating
1st Carbon.
juice
Heat
Filtr.
Cake
Lower Turbidity, colour
FP
SO2
CO2
1st
Clear
juice
1st
Cryst.
2nd
Carbon.
1st
Sepr.
Filtr.
1st
Molas.
Raw sugar
122→52ppm
2nd
Sulfur.
Filtr
Clear Lower turbidity, colour
juice
21→11ppm
2nd
Cryst.
2nd
Sepr.
2nd
Molas.
Sulfied
juice
Evap.
Syrup
Lower turbidity, colour
3rd
Cryst.
3rd
Sepr.
（water consump. 23% lower
Lower energy consump. (1770→1651 GJ）
Lower long crystal, mid size particle 77→80%, lower colour 65→44
Final
Molasses
957→690ppm
Sugar loss
2.79→2.43%
Lactate value
Diffuser
Glucose/Lactate analyzer
124ppm
239ppm
Dextranase
DDS
Mingler
38ppm
Preliming
137ppm
・We assume the infection of Leuconostoc during the process
since the lactate value is increased.
・We are checking the relationship between the value and dextran amount
(Info) There are 2 types of infection
Bacteria and fungi
•Comes normally during the storage of raw material in hot condition, which leads to
lower yield of sugar.
•Normally a carbamate based microbiocide specially formulated to inhibit growth of
bacteria and fungi in cane sugar mills. Sodium dithiocarbamate, Sodium
diethydlthiocarbamate and alkyl dimethyl benzyl ammonium are used in some
countries.
Leuconostoc Mesnteroides
•Under cold weather, Leuconostoc Mesnteroides makes dextran during the process,
which causes filter problem and poor sugar quality (crystallization, fineness etc.)
•An organic antimicrobial based on dual antibiotics with special ingredient effective for
bacteriostatic and bactericidal action, Sodium dithiocarbamate is also used.
•Through our experience in Japan, only Dextranase is used controlling MK value during
the process (no anti-biotic agents at all).
Contact us!
Amano Enzyme Europe Ltd.
Swiss Branch
WTC Lugano
CH-6982 Agno
+41 – 91- 604 6450
sugawara@amano.co.uk