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Feed storage and Godown
management, Estimation of storage capacity and stack plan
Vishnu Vardhan Reddy.PTVM/2015-29
Feed storage
• Need for scientific storage of Animal feed
To maintain both their quality and quantity of feed.
• Need for scientific storage of Food grains
If the prices are low, farmers have to store grains till the
market is favorable.
Food grains are stored for one year for household
consumption .This improves cooking quality.
• Storage loss: it is measured as a reduction in weight.
But this loss may be quantitative as well in terms of
nutritional and germinative i.e. qualitative. And it can
be reduced by better management at different levels of
storage.
• Along with these losses other losses like fallowing may
occur.
Insects, mites and rodents - eat away the germ portion
of the grain rendering it unfit for germination.
Metabolic activities of insects and mites cause dry
heating of the grain.
Mites impart objectionable color to the produce.
Presence of higher moisture contents cause sprouting,
moulding and heating.
Various chemical changes causes acidity and
deterioration of gluiton, vitamins, etc.
• Storage guidelines
1. Store all feed and ingredients at a cool temperature
2. Keep feed dry to prevent fungal or bacterial growth.
3. Prevent rodent or insect entry into feed.
4. Use antioxidants to preserve fats and oils in ingredients
and feed.
5. Use stable forms of vitamins.
6. Expiration dates are required for all food items.
Basic norms for Ideal godowns
Ideally built to protect the produce from ground
moisture, rain, floods, rodents, birds, cattle, thieves,
fire and obnoxious odour.
Provides necessary facilities for inspection, dis-
infestation, loading, unloading.
Should have proper transportation.
Has adequate ventilation.
It should not close to grain fields, salvage, dumping
grounds, sewage, slaughter house, disposal clocks, etc.
The structure shall be so oriented that it will receive
the minimum solar radiation.
Godowns are classified into following 3 categories:
Type of Godown Capacity Small sized godowns less than 1000 MT
Medium sized 1000 MT - 5000 MT.
Large sized Above 5000 MT
Site for Godown construction Raised and well-drained area.
Avoid construction in residential areas
No trees near the structure, the roots of which affect the
foundation. The structure should be at least 3 m away
from any branches of trees, poles etc. so as to avoid the
access by rodents
Area should have good transportation and Sufficient
parking and maneuvering space for vehicles.
Maximum attention should be paid to the hygienic
and sanitary conditions of the area and the following
minimum distances should be maintained:
Units Distance from godown
Bone-crushing mills, garbage-dumping grounds, slaughter-houses, tanneries and hide-curing centers or such other places, the vicinity of which is deleterious to
the safe storage of food grains.
500m
Dairies and poultry farms 300m
Factories and other sources of fire such as workshops, hay stacks, timber stores and petrol pumps.
150m
DESIGN: While designing godowns, consider the safe
bearing capacities of the soil. Trail pits and bores
should be made before designing the foundation and
even before preparing the estimates for the building.
Wherever necessary, soil tests and soil load tests
should be conducted.
For designing structures, the wind loads and
earthquake loads would have to be considered.
Construction of godown
Foundation:
Consist of lean cement concrete (1:5:10) for the walls
and reinforced cement concrete (1:2:4) footings.
A leveling course of lean cement concrete (1:5:10), at
least 75mm thick, shall be provided under the
reinforced cement concrete footings.
To meet the menace of white ants and rodents,
suitable pesticide treatment shall be done in the
foundations and the under floors.
Flooring:
Selected earth filling to avoid cracks in constructions.
A layer of sand of 23 cm thick thoroughly watered and
well consolidated.
A layer of cement concrete (1:5:10) 7.5 cm thick.
A layer of bitumen maxphalt 80/100 or equivalent
spread uniformly at the rate of 1.7 kg/ m2 or a layer of
700 gauge polythene sheet.
A layer of cement concrete (1:5:10) 7.5 cm thick over
the waterproofing layer of bitumen.
A top wearing coat of 5 cm thick cement concrete
(1:2:4) finished with a floating coat of neat cement
shall be provided.
Walls:
The design of the walls shall be in accordance with the
general constructional practices (IS: 1905-1969)
• Brick or stone masonry in cement mortar (1:6).
• Wall thickness – minimum 34 cm.
• RCC columns at a spacing of 4.65 m center to center in
order to provided support for trusses (for gable walls and
partition - at a distance of 4.9 m)
• Gable wall - brick or stone masonry in cement mortar (1:4)
up to a suitable height, and at least 46 cm in thickness.
Roof:
• Steel rods or tubular trusses - fixed on supporting structures at
a height of 5.60 m for the road-fed and 6.35 m for the rail-fed
godown from the floor level for plat forms 3.35m height for
road-fed and for meter-gauge railway godowns and 4.35 m for
those fed with broad gauge.
• Roofing material - corrugated asbestos sheets or galvanized
corrugated sheets, steel sheets or corrugated aluminum sheets.
• Sheets shall project at least 46 cm from the outer surface of the
longitudinal walls.
Doors:
• Normally be steel rolling shutters.
• Not less than 2.45 m X 1.83 m.
Ventilators:
• In longitudinal walls two steel ventilators of opening not
less than 1.494 m X 0.594 m shall be provided in each
bay between RCC columns
• The ventilators shall be fixed 15 cm below the top edge
of the wall.
Finishing:
• The internal faces must be plastered and white washed
and external faces provided with color wash.
• All steelwork and woodwork should have two coats of
superior quality paint over a coat of primer so as to
prevent against rusting and deterioration
• The paint to be used inside the godown for steelwork
and steel/aluminum sheets shall resist the adverse
effects of fumigants.
Drainage:
• To drain off the rain water from the roofs of main godown and
platform - cast iron or asbestos cement pipes of diameter not less
than 10 cm.
• Surface or underground drains to drain the rain water from the
storage premises shall be made.
Water supply:
• If municipal supply of water is not available, an independent source
such as a tube well is required.
• An elevated water tank of required capacity along with
underground pipes for water supply distribution has to be provided.
Electricity supply:
• 220/ 440 volts shall be arranged for water pumping,
motors, ventilating fans lighting inside the building and
premises lighting.
Roads and Parking:
• 10 m wide roads shall be provided between the godowns
and at the sides for movement and parking of trucks during
loading and unloading.
• Sufficient parking areas have to be provided separately for
trucks and other vehicles.
Boundary Wall:
• Adequate height compound wall shall be provided
along with a gate
Miscellaneous equipment required:
Adequate office equipment, laboratory equipment (such
as sampling and grading equipment, moisture meter,
analytical balance, sieves etc.), communication
equipment, weighing equipment and fire fighting
equipment.
Ancillary structures• A small compact block consisting of an office room, a
store room and separate room for keeping pesticides may
be provided at each site.
• For small capacity godowns, the following sizes of rooms
are suggested
– (a) Office room 4.5 m X 3.5 m
– (b) Store room 3.5 m X 3.5 m
– (c) Chaukidar-cum-switch room 4.0 m X 2.25 m
• For large capacities of 5000 MT and more, the following area
are recommended for office block:
– (a) 5000 MT →100 sq m
– (b) Above 5000 & up to 10000 MT→ 180 sq m
– (c) Above 10000 & up to 20000 MT →278 sq. m
For large capacity godowns, the following ancillary structures
may be provided for each center in addition to office block
• Chaukidar and supervisor quarters: Adequate residential
provision for security and supervisory staff should be made
depending upon the site conditions.
• Isolation shed: To keep infested or damaged stocks before
they are finally disposed.
– Preferably have RCC flat roof.
– It shall be partitioned into no. of compartments to keep
infested and damaged stock separately.
• For the staff and laborers, adequate facilities of drinking
water and toilets should be provided.
• For the fire fighting purpose, a network of water supply
pipelines with fire hydrants at suitable locations may be
provided to ensure supply of water at any time.
Storage capacity Capacity of Isolation shed
No of compartments
Up to 5000 100 MT 1
Above 5000 & up to 10000 MT 150 MT 2
Above 10000 & up to 25000 MT 250 MT 2
Above 25000 & up to 50000 MT 500 MT 3
Above 50000 & up to 75000 MT 750 MT 4
Above 75000 1% of storage Minimum of 4
Estimation of Godown Capacity
• Effective Capacity= Length X Breadth X height
• While working out the stack height in bags 2'-3' overhead
space should be left for operational purpose. The stack
height should not be taken above 16 bags.
• The Central and all State Warehousing Corporations are
following a design on the basis of Indian Standard viz. IS:
607 - 1971 (code of practice for construction of bagged
food grain storage structures)
• The stack size for both 2500 MT and 5000 MT godown
is 9.15m X 6.1m X 4.57m.
• The passage between the two stacks is 1.56m, parallel
to the width of the building, and 0.76 m in the
longitudinal directions and around the stacks at the
periphery.
Stack Plan
Stack Plan should be chalked out by keeping in mind the
following 3 points:
Maximum space is put to use for storage of custom.
Proper alleyways are left for carrying out handling
operations with ease and efficiency.
Maximum benefit of aeration and ventilation arrangement
available in the godown is drawn as far as possible.
Stack Size:
• The standard size of stack is 30' x 20'. It can, however,
be reduced, if necessary, in view of the size of the
godown but in no case stack size should be more than
30' x 20'.
• Stack lines should be drawn with paint to mark the
boundary of the proposed stacks.
Common practices at godownDunnage: The bags should not keep on the floor (it
restricts the free movement of air → creates a fertile
ground for the growth and development of insects and
pests.) – Wooden crates, Polythene sheet sandwiched
between 2 layers of mats, Wheat, Paddy husk, etc.
• Wooden crate is an ideal dunnage as it keeps the stock
about 6" high from the floor and provides constant
circulation of air under the bags.
Inspection of bags at the time of receipt :
Examine carefully. Bags which are cut, torn slack or damage
by insects, moisture, dampness or having deleterious
refractions or contamination should be segregated.
Infested & Moist Lots:
• Bags containing living insects should be stored outside the
godown and fumigated immediately. After dis-infestation,
these bags should be stored in godowns.
• Moist grains should be removed from the bags and
spread out for drying and thereafter stored.
Sampling:
• From 10% bags selected at random, samples should be
drawn taking out a handful from different levels. 4
samples each of 500 gms should be formed out of the
samples thus drawn, one of the samples should be
analyzed in the laboratory and the remaining 3
samples should be sealed in presence of depositor.
Prescribed specifications should be followed for
analysis of the samples
Rodent or Rat Proofing:
Permanent solution, the horizontal projections at plinth level should
be provided. Any suitable chemical control should be adopted as
and when there is infestation, but the projection at plinth level is
considered as the best.
Anti terminate treatment:
The wooden logs used for dunnage should, however, be treated
before stacking.
Bird Proofing:
The ventilators should be fitted with 25 mm X 51 mm size iron mesh
for restricting the birds from coming in.
Fumigation:
Pre-monsoon and Post-monsoon fumigation should be done.
Spraying of insecticides and pesticides should be done as and when
any infestation is noticed.
Quality checking:
There should be provision for checking the quality before receiving
any lot for storage.
Main quality check is the safe limits of moisture content.
Besides moisture content, the lot should be checked for any increase
in temperature, fungus attack and cake formation and insect
infestation from time to time.
Use of Insecticides
Compound Mode Dose
Aluminum Phosphide
Fumigation under the gas proof
if infestation is noticed @3 tablets per MT
fresh stocks @2 tablets per MT
Malathionsprayed on walls / alleyways / bags /
surface
1:100 ie. 1 part of malathion and 100 parts of water.
3 Lts /100 sq mts or 4 CC per 100 bags
Deltamethrin spraying120 gms of deltamethrin + 3 lts of water / 100 sq mts of surface area
once in three months.
Other works• use portable steps to enter godowns in order to avoid
rats.
• Do not allow poor specification for construction.
• Do not extend stacking beyond the stacking lines.
• Do not exceed stacking of bags beyond the specified
limit.
• Do not exceed the dosages prescribed for fumigation.
• Do not keep the infested grains along with good stock.
Vishnu Vardhan Reddy.PTVM/2015-29
T H A N K Y O U