1 Correction to: Journal of Soils and Sediments https://doi.org/10.1007/s11368-021-02980-5

In the originally published version of the article, Fig. 3 image contained errors. In the original draft, the units found in the legend of Fig. 3 were incorrect, which was indicated by the red box. The authors would like to correct these errors.

figure a

The corrected Fig. 3 is shown here. The authors revised the units in the legend of Fig. 3 as follows:

Fig. 3
figure 1

The concentrations of total organic carbon (TOC) along the height of the up-flow bioreactor (UFBR)