Grain storage in a film tube – a strong system

Safe storage and conservation conservation of agricultural products over longer periods of time is a prerequisite for worldwide trade as well as for local supply for people and animals even outside the cultivation and harvesting season. This does not just mean that losses are minimised, but also that quality is guaranteed.

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The silage is pressed and compressed against a pressure grid by a rotor. Grain storage in a film tube – a strong system
The silage is pressed and compressed against a pressure grid by a rotor.

Usually, agricultural products are made storable by removing moisture/drying out or conservation/ensilage conservation/ensilage. Costs, practicality, safety of the method as well as the planned use of the products are the main considerations in such cases. The storage costs must usually be covered via contractually fixed prices or increasing prices between the time of storage and the time of sale. Currently, this is frequently no longer the case, as new, cost-effective, and flexible systems become increasingly important: film tubes. This technology is ideally suited for ensilage in a film tube, a film tube, as well as for the efficient storage of grain.

Ensuring solid ground conditions during removal

Its implementation is extremely simple in practice. A paved area is not absolutely necessary, film tubes can generally be stored on unpaved ground. However it is necessary to bear solid ground conditions in mind during removal. Alternatively, the ground can be gravelled or fixed in asphalt or concrete. This means that essentially, minor or no structural changes are necessary. After the film tube is filled with grain (or silage) it is immediately sealed so that it is air-tight, whilst additional silo protective nets protect the tube from unwanted damage due to animals. A practical trial shows how effective the procedure is: A trial carried out by Budissa Agrarprodukte Preititz/Kleinbautzen GmbH stored Tarso wheat (moisture content 10.9 per cent) in two film tubes. Gas-tight valves were used for regular sampling in the tubes and data loggers are inserted to determine temperature profiles. A control sample tested in the same manner was stored in the warehouse.

The practical test shows: The film tube is competitive

The trial result: A gradual drop in temperature and rapid convergence to outside temperatures was recognisable in both film tubes. This is indicative of very low levels of microbiological activities. Both chemical and microbiological indicators show extremely homogeneous results. The available contents of starch and raw protein for storage, as well as the pH value, remain practically unchanged. In addition, no increase of the investigated groups of micro-organisms was recognised. The contents of the microbial groups lie within the guideline values for ground grain products set out by the German Society for Hygiene and Microbiology (Deutsche Gesellschaft für Hygiene und Mikrobiologie, DGHM). Trials showed that grain with storable levels of dry matter could be stored in film tubes without impairing quality. In regard to conventional grain storage, the use of film tubes for storage is comparable in terms of costs, quality, and labour. In addition, a high degree of flexibility is maintained.

At a glance:

  • air- and watertight
  • immediate exclusion of air
  • UV-resistant
  • clean and hygienic for feed
  • small section = high feed rate
  • high-performance
  • flexible
  • safe, long-term storage solution
  • cost-effective investment
  • short amortisation time
  • moist and dry products (e.g. moist corn maize)
  • also suitable for bulk materials such as manure or road salt
  • suitable for companies of any size: storage/removal less than 5 euro/tonne

Further information can be obtained from Jan Witthinrich, tel. 0049-251 682-2310,, Frank Krüger, tel. 0049-511 8075-3347,