某些芳香化合物生物降解性研究

研究了５类３２种芳香化合物生物降解性，选用城市污水场污泥富集的混合菌种做菌源，在好氧生物解实验条件下，苯甲酸类、苯酚类和甲苯是较容易降解的；苯和苯的同系物是可生物降解的；苯磺酸类和含氮芳氮芳香化合物均是难降解的。

BIODEGRADATION OF SOME AROMATIC COMPOUNDS

The results of biodegradation test for 32 aromatic compounds are reported in this pa-per.The experiments were carried out under aerobic conditions by using the mixed cultureselected from activated sludge of a municipal wastewater treatment plant.Benzoate,phtha-lates,phenols(only contains hydroxyl group)and toluene were degraded easily.Benzeneand benzene homologous compounds are degradable;Benzene sulfonate,nitrogen containingaromatic compounds are refractory compounds for degradation,The bioldegradability of thecompounds depends strongly on its chemical component and structure. The refractory tobiodegradation of the compounds would increase as the number of the substitute group in-crease or the substitute chain lengthen. Position isomerization of the substitute groups alsoaffects biodegradability of the compounds. Acclimated bacteria become more agreeable tometabolite above compounds.Lag time gets shorten and the rate of biodegradation arises.