The last years due to intensive industrial development, increasing canalization, changes in technology of animal husbandry (mainly rapid growth of the amount of liquid manure) the quantity of waste-water and sewage sludge is nearly three times higher in comparison to the 70's. The most rational and economic way for their decontamination is the disposal on agricultural fields without harmful side-effects. This paper gives information about the system, elaborated for the regulation of water and sewage sludge disposition in Hungary.
We investigate the kinetic freeze-out scenario of a nucleon gas through a finite layer. The in-medium mass modification of nucleons and its impact on the freeze-out process is studied. A considerable modification of the thermodynamical parameters temperature, flow-velocity, energy density and particle density has been found in comparison with evaluations which use a constant vacuum nucleon mass.
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