Water quality assessment and decolourisation of contaminated ex-mining lake water using Bioreactor Dye-eating Fungus (BioDeF) system: a real case study by Mohd Hanafiah, Zarimah, Azmi, Ammar Radzi, Wan-Mohtar, Wan Abd Al Qadr Imad, Olivito, Fabrizio, Golemme, Giovanni, Ilham, Zul, Jamaludin, Adi Ainurzaman, Razali, Nadzmin, Halim-Lim, Sarina Abdul, Wan Mohtar, Wan Hanna Melini