Correction to: Journal of Material Cycles and Waste Management https://doi.org/10.1007/s10163-020-01117-z

In the original publication of the article, the Eq. 4 has been wrongly published. The correct Eq. 4 is given in this correction.

The original article has been corrected.

$$ {\text{Recovery}}\;{\text{against}}\;{\text{TN}}\;{\text{in}}\;{\text{ifluent}}\,{\text{sludge}}\,{\text{(\% )}} = \frac{{{\text{TAN}}_{{{\text{rec}},{\text{mass}}}} }}{{{\text{TN}}_{{\inf ,{\text{mass}}}} }} \times 100. $$
(4)