Electrostatic charging of animal feeds
The electrostatic charging of powders can initiate a range of behaviours of varying complexity and detectability, which can even sometimes appear rather unexpected. In the animal feed sector, electrostatic charging may to some extent explain various undesirable phenomena: • Carry-over • Electrical charging of facilities • Explosions The tests carried out jointly by Tecaliman and […]
Method for measuring bulk density, tap density and the Hausner ratio for additives and feedstuffs
Following the purchase of a new powder compac-tion apparatus, Tecaliman decided to modify its measurement procedure for bulk and tap densi-ties, and the resulting Hausner ratio. The objective was to arrive at a procedure similar to the measu-ring technique used by Carr (1965), as applied to the Hosokawa apparatus. Abdullah and Geldart (1999) demonstrated that […]
Flow patterns of additives used in animal feed manufacture during screw extractor feeding
Whether for additives or raw materials, operators may wish to predict flow rate and regulation according to screw speed in order to control dosing operations. These parameters depend on screw geometry and the linkage between the cell and the screw, and also on the physical properties of the dosed products. This research seeks to further […]
Technical rules for assessing the level of carry-over between feedstuff batches
Industrial obligations allied with French and European regulations are driving feedstuff manufacturers to assess the level of carry-over on their production lines. These technical rules, which are recognised by several certification reference systems, can also be applied to manufacturers of mineral and additive premixes. These carry-overs consist of technically unavoidable traces of residual product in […]
Identification of high risk points associated with the use of additives in plants
The aims of this sheet are to encourage plant managers to be more vigilant, to lead them to question themselves regarding their practices and to make them aware of the HACCP method (Tecaliman 1996 : i’Tec_S2). This sheet has been drafted using the results of the program implemented by TECALIMAN, with the assistance of the […]
Establishing decontamination scales via the pelleting of pig, laying hen, broiler and turkey feeds
European regulations 183/2005 of 12/01/05 and 2160/2003 of 17/11/03 are driving the animal feed sector to strengthen its control over the risk of salmonella infection. This legislation was incorporated into French law under the order of 23 April 2007, which focuses specifically on the treatment of feedstuffs destined for breeding laying hens. The requirements laid […]
Technical rules for assessing the bacteriolytic effectiveness of a pelleting line or a heat treatment
The implementation of European regulations 183/2005 of 12/01/05 that establishes feed hygiene requirements, and 2160/2003 of 17/11/03 on control of salmonella in the food chain led to the publication in the French Official Journal of the Order of 23 April 2007 relating to approvals of business operators in the animal feed sector. This order introduced […]
Using Dustmon to measure dust concentration in livestock feed additives
Dust cloud analysis can be used to characterise the physical and behavioural properties of a pulverulent product in the same way as particle density, grain size analysis, etc. Until recently, the Heubach method was considered the benchmark technique for this “behavioural measurement”. The limitations of this method have been comprehensively discussed (i’Tec_Q5). The last few […]
Effect of tracer concentration on homogeneity and carry-over
These 2 industrial trials, designed to identify whether tracer concentration has any effect on carry-over, compared the same product at two very different concentrations (200 and 1000 ppm) in order to determine the rate of carry-over for a given quantity of premix fed into the circuit. Two tracer batches and two collector batches were used […]
Technical rules for assessing carry-over in delivery trucks
These simple technical rules were developed as part of a study programme led by Tecaliman, and funded by the association and the DGAl (French Directorate of Food). The rules were established based on the results of this study, summarised in i’Tec_H7 and presented in more detail in Special Report No. 53. By way of introduction […]