Photo-oxidation of pre-treated palm oil mill Effluent using cylindricalcolumn immobilized photoreactor - Mohammed Haji, Alhaji; Khairuddin, Sanaullah; Shanti Faridah, Saleh; Rubiyah, Baini; Soh, Fong Lim; Andrew Ragai, Henry Rigit; Khairul Anwar, Mohamad Said; Afrasyab, Khan (Elsevier B.V., 2018)