BIS Certification mandatory for Fortified Rice Kernels (FRK) Equipment Manufacturers under IS 17853:2022:
Rice fortification is a process of adding the essential micronutrients to regular rice. Fortified Rice
Kernels (FRK) are rice-shaped kernels comprising of micronutrient premix such as iron, folic acid and
vitamin B12. Fortified Rice (FR) is obtained by blending FRK with polished raw or parboiled rice in the
ratio of 1:100 or 2:100, which means 10 gm of FRK must be blended with 1 kg of regular rice. The
Vitamin and Mineral Premix (VMP) is added to rice-based carrier to form FRK using two technologies
namely extrusion and coating.
To address malnutrition, anaemia and micronutrient deficiencies, the Department of Food and Public Distribution ensures that "Rice Fortification" is implemented successfully. A Standard Operating Procedure (SOP) has also been developed and issued by the Food Corporation of India (FCI) on 23.03.2022, in order to assure the efficient implementation of the entire rice fortification programme and to maintain the desired quality standards within the domestic supply chain.
FCI has made it mandatory for FRK equipment manufacturers to switch over from non-BIS to BIS certified machinery within a period of 1 year from the date of notification i.e., 23.03.2022. Therefore, in order to comply with the FCI requirement of mandatory BIS certification, the manufacturers of FRK equipment should have got their machinery BIS certified before 23.03.2023.
BIS has developed Indian Standard IS 17853:2022 which deals with Specifications for “Equipment for manufacture of Fortified Rice Kernels (FRK)” to ensure and assure that the quality of the fortified rice kernels is not compromised. IS 17853:2022 covers the specification for machinery used for production of FRK through the process of “Extrusion”. Micro-pulverizer, Mixing unit, Extruder and Dryer are the main equipments for manufacturing FRK.
Under the IS 17853, the performance requirements along with constructional specifications have been prescribed for the following equipments:
a) Micro-pulveriser
b) Mixer
c) Extruder
d) Dryer
To address malnutrition, anaemia and micronutrient deficiencies, the Department of Food and Public Distribution ensures that "Rice Fortification" is implemented successfully. A Standard Operating Procedure (SOP) has also been developed and issued by the Food Corporation of India (FCI) on 23.03.2022, in order to assure the efficient implementation of the entire rice fortification programme and to maintain the desired quality standards within the domestic supply chain.
FCI has made it mandatory for FRK equipment manufacturers to switch over from non-BIS to BIS certified machinery within a period of 1 year from the date of notification i.e., 23.03.2022. Therefore, in order to comply with the FCI requirement of mandatory BIS certification, the manufacturers of FRK equipment should have got their machinery BIS certified before 23.03.2023.
BIS has developed Indian Standard IS 17853:2022 which deals with Specifications for “Equipment for manufacture of Fortified Rice Kernels (FRK)” to ensure and assure that the quality of the fortified rice kernels is not compromised. IS 17853:2022 covers the specification for machinery used for production of FRK through the process of “Extrusion”. Micro-pulverizer, Mixing unit, Extruder and Dryer are the main equipments for manufacturing FRK.
Under the IS 17853, the performance requirements along with constructional specifications have been prescribed for the following equipments:
a) Micro-pulveriser
b) Mixer
c) Extruder
d) Dryer
[A] MICRO-PULVERISER:
1. General Requirements
a) Blower of suitable size shall be provided to pass rice flour from grinder to cyclone.
b) Electric motor of suitable size shall be installed to provide required rpm (revolution per minute) to hammer and blower as per requirement.
2. Performance Requirements
a) Average particle size of rice flour shall be less than 250 μm (preferably below 150 μm).
b) Rice flour obtained after pulverization shall be free from metal or foreign impurities.
3. Components of Micro-pulveriser
1. Hopper
2. Grinding Chamber
3. Screen
4. Hammer
5. Cyclone
6. Control Panel
7. Pipes and Fittings
8. Supporting Frame
a) Blower of suitable size shall be provided to pass rice flour from grinder to cyclone.
b) Electric motor of suitable size shall be installed to provide required rpm (revolution per minute) to hammer and blower as per requirement.
2. Performance Requirements
a) Average particle size of rice flour shall be less than 250 μm (preferably below 150 μm).
b) Rice flour obtained after pulverization shall be free from metal or foreign impurities.
3. Components of Micro-pulveriser
1. Hopper
2. Grinding Chamber
3. Screen
4. Hammer
5. Cyclone
6. Control Panel
7. Pipes and Fittings
8. Supporting Frame
| COMPONENTS OF MICRO-PULVERIZER | ARRANGEMENT | GRADE OF MATERIAL |
|---|---|---|
|
Hopper |
[1] The hopper shall be suitably
designed to feed the broken rice in the
grinding house/chamber. [2] Hopper shall be provided with a magnet to trap metal impurities. |
Stainless steel grade X04Cr19Ni9 |
|
Grinding Chamber |
[1] Installation of screen and hammer. [2] Grinding chamber suitably installed maintaining proper clearance with hammer and screen. [3] Suitable inlet for receiving broken rice/rice and outlet for rice flour. |
Stainless steel grade X04Cr19Ni9 |
|
Screen |
[1] Suitable wear resistant screen. [2] Enable obtaining rice flour size of less than 250 μm (preferably 150 μm). |
Stainless steel grade X04Cr19Ni9 |
|
Hammer |
Wear resistant duly balanced special
type of hammers. |
Stainless steel grade X04Cr19Ni9 |
|
Cyclone |
[1] Suitable connecting pipes and
fittings shall be provided to attach it
with grinding house/chamber. [2] Supporting frame shall be of stainless steel. [3] Dust collecting bag/filters shall be provided to collect the fine dust releasing with exit air out of the cyclone. |
Stainless steel grade X04Cr19Ni9 |
|
Pipes and fittings |
|
Stainless steel grade X04Cr19Ni9 |
|
Supporting frame |
|
Stainless steel grade X04Cr19Ni9 |
|
Control Panel |
The control panel shall consist of: [1]Feed rate controller; and [2] LCD/LED/HMI screen to control process parameters such as feed rate, level of grains in hopper, etc. *It may also have a supervisory control and data acquisition (SCADA) system to record feed rate, output rate, current, voltage, power, etc. |
|
[B] MIXING UNIT (POWDER-MIXER)
Mixer shall be single/twin shaft paddle blender or double helical ribbon blender. Mixing chamber
may be U-shaped for single shaft or W-shaped for twin shaft.
1. General Requirements
Suitable size of Electric Motor shall be installed to provide required rpm to the shaft of the mixer.
2. Performance Requirements
The mixer shall ensure proper mixing operation such that:
a) Iron, folic acid and vitamin B12 are blended uniformly in the mixture;
b) Moisture distribution is uniform without lumps; and
c) The final mixture is free from the metal impurities as per the test method given in Annex B
Annex B- PROCEDURE- DETERMINATION OF CONTENT OF IRON PARTICLES
A known amount of (25 g) mixed flour is spread evenly on a petri dish. A powerful magnet wrapped in polythene sheet is run over the sample repeatedly to collect the iron filings/particles. The presence of iron filing/particle shows compromise of critical control parameter, and hence in the efficacy of the magnet used at various control points. Hence, at the end of the test no iron filing/particle shall be present.
3. Components of Mixing Unit
1. Mixing Chamber
2. Cover/lid
3. Shaft
4. Paddle
5. Helical Ribbon
6. Gasket
7. Supporting Frame and Structure
1. General Requirements
Suitable size of Electric Motor shall be installed to provide required rpm to the shaft of the mixer.
2. Performance Requirements
The mixer shall ensure proper mixing operation such that:
a) Iron, folic acid and vitamin B12 are blended uniformly in the mixture;
b) Moisture distribution is uniform without lumps; and
c) The final mixture is free from the metal impurities as per the test method given in Annex B
Annex B- PROCEDURE- DETERMINATION OF CONTENT OF IRON PARTICLES
A known amount of (25 g) mixed flour is spread evenly on a petri dish. A powerful magnet wrapped in polythene sheet is run over the sample repeatedly to collect the iron filings/particles. The presence of iron filing/particle shows compromise of critical control parameter, and hence in the efficacy of the magnet used at various control points. Hence, at the end of the test no iron filing/particle shall be present.
3. Components of Mixing Unit
1. Mixing Chamber
2. Cover/lid
3. Shaft
4. Paddle
5. Helical Ribbon
6. Gasket
7. Supporting Frame and Structure
| COMPONENTS OF MICRO-PULVERIZER | ARRANGEMENT | GRADE OF MATERIAL |
|---|---|---|
|
Mixing Chamber |
[1] Mixing Chamber shall be provided with
water spray arrangement. [2] It shall be provided with lump breaking arrangement to break the lumps formed during mixing. [3] Water dosing unit of mixing unit should be provided with: a) Suitable arrangement to spray water, b) Water dosing pump, and c) Automatic flow control system. [4] Mixing unit should be provided with automatic feeding unit (VMP dosing unit) for VMP mixture. |
Stainless steel grade X04Cr19Ni9 |
|
Cover/lid |
Cover/lid shall be provided with a food-
grade gasket to avoid spillage of material. |
Stainless steel grade X04Cr19Ni9 |
|
Shaft |
|
Stainless steel grade X04Cr19Ni9 |
|
Paddle |
Paddles, (if provided) shall have a) Square or,br> b) Rectangular or c) Triangular paddle with connecting rod suitably mounted on the shaft. |
Stainless steel grade X04Cr19Ni9 |
|
Helical Ribbon |
|
Stainless steel grade X04Cr19Ni9 |
|
Gasket |
Cover/lid shall be provided with a food-
grade gasket to avoid spillage of material. |
Food grade rubber |
|
Supporting Frame and Structure |
|
Stainless steel grade X04Cr19Ni9 |
|
Control Panel |
The control panel shall consist of: [1] Feed rate controller; and [2] LCD/LED/HMI screen to control process parameters such as feed rate, level of grains in hopper, etc. *It may also have a supervisory control and data acquisition (SCADA) system to record feed rate, output rate, current, voltage, power, etc. |
|
[C] EXTRUDER
1. General Requirements
a) Electric motor of suitable size shall be installed to provide required rpm to operate extruder, feeding screw and cutter;
b) Extruder shall have provision of heating and cooling; and
c) Extruder shall be equipped with temperature sensors at each zone.
2. Performance Requirements
The size and weight of FRK obtained from extruder should be uniform.
3. Components of Extruder
1. Barrel
2. Extruder Screw
3. Die Head
4. Die
5. Cutter
6. Body Cover
7. Supporting Frame and Structure
8. Feeder
a) Electric motor of suitable size shall be installed to provide required rpm to operate extruder, feeding screw and cutter;
b) Extruder shall have provision of heating and cooling; and
c) Extruder shall be equipped with temperature sensors at each zone.
2. Performance Requirements
The size and weight of FRK obtained from extruder should be uniform.
3. Components of Extruder
1. Barrel
2. Extruder Screw
3. Die Head
4. Die
5. Cutter
6. Body Cover
7. Supporting Frame and Structure
8. Feeder
| COMPONENTS OF MICRO-PULVERIZER | ARRANGEMENT | GRADE OF MATERIAL |
|---|---|---|
|
Barrel |
[1] Type of barrel may be used: a) Square or b) Circular [2] Suitable heaters should be used in each section to heat the barrel at a given temperature. [3] The temperature should be automatically controlled as per the set conditions. |
Wearing, abrasion and corrosion
resistant, food grade nitriding steel of
grade EN41B or 38CrMoAl or any other
similar material |
|
Extruder Screw |
[1] Extruder may be provided with: a) Single or b) Multi-screw element positioned on the shaft. [2] It should be properly designed to convey material from feed to die section. [3] It should be wear-resistant, suitable to sustain high pressure. |
Wearing, abrasion and corrosion
resistant, food grade nitriding steel of
grade EN41B or 38CrMoAl or any other
similar material. |
|
Die Head |
[1] Die head of extruder shall be suitably
designed to hold die. [2] It shall be provided with temperature and pressure sensor. |
Wearing, abrasion and corrosion
resistant, food grade nitriding steel of
grade EN41B or 38CrMoAl |
|
Die |
The die opening shall be such that kernels
should not stick together while cutting. |
Stainless steel of grade X04Cr19Ni9N
or Die steel |
|
Cutter |
The cutter speed shall be adjustable with
rated extruder screw speed. |
Stainless steel of grade X04Cr19Ni9 |
|
Body Cover |
|
Stainless steel of grade X04Cr19Ni9 |
|
Supporting Frame and Structure |
|
Stainless steel of grade X04Cr19Ni9 |
|
Feeder |
Feeder of extruder shall be of single/ twin-
screw type with precise control depending
upon the capacity. It shall be provided with
suitably designed hopper to deliver wet
material to screws. |
|
|
Control Panel |
Control panel of the extruder shall be
provided with: [1] Control system for temperature, screw speed, feed rate, cutter speed; and [2] LCD/LED/HMI screen to control process parameters. [3] The extruder may also be provided with SCADA system to record torque, die pressure, barrel zone, die head temperature, cutter speed, output capacity. |
|
ANNEX C- WEARING, ABRASION AND CORROSION RESISTANT, FOOD GRADE NITRIDING STEELPROPERTY
CHEMICAL PROPERTIES
The steel shall conform to the following chemical composition (in percent):
C 0.35-0.42
Si 0.20-0.45
Mn 0.30-0.60
Cr 1.35-1.65
Md 0.15-0.25
Al   0.7-1.1
P 0.035, Max
S 0.035, Max
The analysis of the steel shall be carried out according to IS 228 and its relevant parts or any other established instrumental/chemical method. In case of dispute, the procedure given in IS 228 and its relevant parts shall be referee method.
C 0.35-0.42
Si 0.20-0.45
Mn 0.30-0.60
Cr 1.35-1.65
Md 0.15-0.25
Al   0.7-1.1
P 0.035, Max
S 0.035, Max
The analysis of the steel shall be carried out according to IS 228 and its relevant parts or any other established instrumental/chemical method. In case of dispute, the procedure given in IS 228 and its relevant parts shall be referee method.
[D] DRYER
1. The dryer shall be of continuous electrical type with multilayer vibratory arrangement of required
capacity.
2. Dryer shall perform in such a way that colour change and fissure formation shall be avoided.
3. Belt of dryer shall be made of food grade material.
4. Dryer shall have suitable heating and cooling arrangement to control temperature and relative humidity.
5. Blower of suitable size shall be installed for controlling the airflow in the dryer.
6. Dryer shall be equipped with temperature sensors, airflow meter and relative humidity (RH) sensors.
1. General Requirements
Suitable size of electric motor shall be installed to operate belt conveyors and blowers of the dryer.
2. Performance Requirements
a) The FRK obtained after drying shall not have more than 12% moisture by mass.
b) The FRK obtained after drying shall be free from fissures.
c) The FRK obtained after drying shall not show any colour change in FRK.
d) The FRK obtained after drying shall be free from metal impurities and foreign matter.
3. Additional Requirement
A magnetic-separator arrangement should be provided to check for metallic matter or any other arrangement or equipment required to produce FRK as per IS 17782.
2. Dryer shall perform in such a way that colour change and fissure formation shall be avoided.
3. Belt of dryer shall be made of food grade material.
4. Dryer shall have suitable heating and cooling arrangement to control temperature and relative humidity.
5. Blower of suitable size shall be installed for controlling the airflow in the dryer.
6. Dryer shall be equipped with temperature sensors, airflow meter and relative humidity (RH) sensors.
1. General Requirements
Suitable size of electric motor shall be installed to operate belt conveyors and blowers of the dryer.
2. Performance Requirements
a) The FRK obtained after drying shall not have more than 12% moisture by mass.
b) The FRK obtained after drying shall be free from fissures.
c) The FRK obtained after drying shall not show any colour change in FRK.
d) The FRK obtained after drying shall be free from metal impurities and foreign matter.
3. Additional Requirement
A magnetic-separator arrangement should be provided to check for metallic matter or any other arrangement or equipment required to produce FRK as per IS 17782.
Conclusion:
In order to maintain the grain density, shape, and size, FRK manufacturers are mandatorily required
to have BIS certified machinery as per IS 17853. Also, the manufacturers of FRK machine should
purchase all the equipment parts from only BIS certified vendor.
The content of this article is intended to provide a general guide to the subject matter. Specialistadvice should be sought about your specific circumstances.
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