OPTIMIZATION OF SOLAR FENTON OXIDATION AND COMPARISON OF RECYCLE WET AND DRIED FENTON SLUDGE IN TREATING PALM OIL MILL SECONDARY EFFLUENT. J. Teknol. [Internet]. 2016 Jun. 15 [cited 2024 Dec. 19];78(6-7). Available from: https://journals.utm.my/jurnalteknologi/article/view/9085