Staff PhD
Development of injection equipment for landspreading of mechanically separated slurry and nutrient rich liquid, produced in a high technology slurry separation plant (biofertilizers), with the special addition to minimize the ammonia loss by landspreading
Tavs Nyord
| University | University of Southern Denmark, Odense |
| Department |
Department of Agricultural Engineering |
| Supervisor | Professor, Ph.d. Sven G. Sommer |
| Local Supervisor | |
| Project term | 2005-2008 |
| Masters degree | M.Sc. Agro. The Royal Veterinary and Agricultural University, Copenhagen |
Background
Slurry separation is a technology whereby slurry is separated into a solid fraction and one or more liquid fractions. The technology is interesting because it opens a possibility for transferring one or more of the fractions from areas with a high density of livestock to areas with a deficit of nutrients/bio fertilizers and lesser densely populated. The technology will help detaching animal and plant production fully or partly, which in turn could have both financial and environmental advantages.
Slurry separation is a known technology and expected to become integrated in living stock production in time both here and abroad. For this technology to be implemented industry wide, it is paramount that the fractions and their bio fertilizing effects are equal to or better than non separated slurry. This however, is not always possible today, underlining the need for further research on the field.
Aim
It is a well known fact that today’s distribution of liquid fractions can cause high to very high losses of ammonia to the environment. The development of enhanced distribution systems for separated liquid fractions on arable crows will be of significant consequence for the separating technology. The distribution into arable crows will ensure an optimal utilisation of the nutrient in the bio fertilizers, but damage to crops must be avoided although the spreading equipment will have be of considerable size and capacity
- Research of the relationship between the mixing of coagulant and flocculant additives in connection with low technology mechanical separation and the potential of ammonia volatilisation from the liquid fraction.
- Selection of design parameters for the construction of a distribution vehicle designed to inject liquid fractions of low tech separated slurry.
- Testing of selected designs
- Development of a liquid fraction injection type vehicle together with a mechanical soil loosening capability