16th January 2018


Research activities under this programme involve the design, construction and evaluation of various structures, systems and equipment used in post harvest technology. In the past years various research outputs in this programme has been tailored towards the realization of specific mandates of the institute. The following are the achievements of the programme;
i.      The development of the use of ventilated yam barn for the storage of fresh yam tubers.
ii.     The development of Diffuse Light Store (DLS) for storage of potato
iii.     Improvement of the “rhumbu” for the storage of dry grains in the dry areas of the country to make them fumigatable.
iv.    Development of Evaporative coolers for storage of fresh fruits and vegetables
v.     Development of Packing House for handling, packaging and long term storage of fruits.
vi.    The design, fabrication and development of various dryers                                                  

  • Solar tray,
  • Multipurpose dryer,    
  • Hybrid dryers, and
  • Tent dryers.
  • Electrically powered dryers for conducting drying experiments

  vii.       Design, construction and evaluation of different models of fish smoking kilns. Improved fish smoking kiln was designed and     fabricated and cat fish samples smoked in them to the drying efficiency as well as fuel use efficiency of the constructed kilns. The fish smoking kiln were made in three different models namely;

1.    All metal free convention smoking kiln: the internal wall is made of galvanized sheet while the external wall is made of mild steel. The combustion can be fired directly using fire woods or with charcoals placed in a container.
2.    Metal covered with wood (free convention) fish smoking kiln: this is similar to the all metal model with the only difference being the use of plywood as the external wall of the kiln.
3.    All-Metal forced convention fish smoking kiln: the distinguishing feature of this model is the incorporation of a fan to activate air movement and uniform distribution of heat in the kiln. However, only charcoal pot can be used with the system.
The smoking kilns are in 25 kg and 50 kg and can be constructed with higher capacities based on request.



Storage of Cereals and Pulses

Farm Level: The Institute has developed the use of rhumbus and cribs for the storage of un-threshed sorghum heads/ maize on cobs at farm level.  

Domestic/Household level – The institute observed that 25% of grains produced in the country are stored at household.  Hence hermetic storage in airtight containers (plastic or metal drums/buckets), polyethylene-lined (hessian) bags without the use of chemicals were developed.

Organic Materials as Pesticides: The institute has carried out research on the use of plant materials (Dennettia tripetala and Piper guineense). Nigerian derived Diatomaceous Earth (DE) has also been used for the control of insect pests such as sitophilus oryzae and Rhyzopertha dominica. Inert materials such as dolomite dusts and cow bone dusts have also been used for the control of Maize beetles. 

Commercial/Large levels- Standard warehouse storage in jute bags and with effective pest control.

Bulk storage/Inert Atmosphere Silo: this is a technology that creates an inert atmosphere within an air-tight metal silo through the elimination of oxygen gas and replacing the gas with nitrogen gas. It has been used to store grains for over three years without losses. This technology is safe as no chemical is used throughout the storage period; incidence of moisture condensation is completely eradicated and there’s zero tolerance to insect survival. 45 tons of Cowpea was stored for 24 months in Ibadan station, 100 tons of wheat was stored at the Headquarters for 39 months.

Plant Materials (Botanicals)

Nigerian Derived Diatomaceous



Fresh Fish Storage - The Institute developed Iced Fish Box for storage of fresh fish and marketing. With appropriate ice to fish ratio the box can preserve fresh from 48 to 72 hours without additional power source.
Fish Processing – The Institute developed various models of fish smoking kiln that can produce quality fish products within acceptable limit of hydrocarbon content. The developed kilns incorporated with fan for higher performance can also be powered by charcoal, gas and electricity.
Dried Fish Packaging and Storage- Dried Fish will go badly easily if not well packaged. NSPRI has developed packaging materials for dried fish.
Fish-potato snack- A meal snack consisting potato and dried fish has also been produced.


Fish arranged on the drying nets

Fish Ice Boxes







Fruit and Vegetable Shed

Vegetable baskets







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