UNASSIGNED: In the situation of increasing agricultural utilization of residues from biogas production (RBP) it is important to determine the concentration of contaminants, which could occur in these materials. The group of contaminants that requires special attention are @entity2555 ( @entity2556 ). The objective of the study was to determine the total and freely dissolved (Cfree) of @entity2556 in RBP from 6 different biogas plants operating under various temperature conditions and without or with the separation into the solid and liquid fractions. The freely dissolved @entity2556 were determined using @entity31718 (POM method). The total content of the   16 @entity2556 in RBP varied from 449 to 6147   g/kgdw, while that of Cfree @entity2556 was at the level from 57 to 653  ng/L. No significant differences were noted in the content of the   16 @entity2556 (total) between the solid and the liquid fractions. This indicates that in the course of the separation, the @entity2556 are distributed proportionally between the fractions. However in the case of Cfree, @entity2556 content in the solid fraction was over twice as high as in the liquid fraction. This was probably due to the greater affinity of the particles present in the liquid fraction to the analysed @entity2556 than to the particles of the solid fraction. Higher affinity to liquid fraction was also confirmed by the distribution coefficients KTOC determined on the basis of Cfree.

The total and freely dissolved XXXX content in residues from biogas production.

@entity2556 :: ('CHEBI:33848', 'Chemical') :: ['PAH', 'PAHs'] @entity31718 :: ('CHEBI:61536', 'Chemical') :: ['polyoxymethylene'] @entity2555 :: ('MESH:D011084', 'Chemical') :: ['polycyclic aromatic hydrocarbons']
@entity2555 :: (MESH:D011084,Chemical) :: ['polycyclic aromatic hydrocarbons']
