Comparison of bacterial 16S rRNA gene copy number and copy numbers of integron classes 1 and 2.

<p>The error bars represent standard deviations of three technical replicates. Abbreviations: Eqr  =  equilibratior; Aer1  =  aeration tank No. 1; Aer2  =  aeration tank No. 2; Stl  =  settling tank; SS  =  secondary sludge; DS  =  dewatered sludge; OS  =  old dried sludge.</p>