Adjustment of sludge pH 3 generates OHcal dot" data-inlimg="/entities/rad" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB"> by utilizing iron already present in sludge.
Combined degradation process FS is more efficient than individual treatments.
Release of CTC and utilization of sludge iron are showing a synergistic effect in FS.
Sludge solids showed a negative effect on CTC degradation efficiency.