SUMMARY Pepaya seeds are waste from pepaya fruit which is thrown away by the community because it is considered useless. This study aims to analyze the biocoagulant ability of pepaya seeds (Carica papaya) to remove odor, color, organic matter and Fe ions contained in peat water. The preparation of pepaya seed biocoagulant was carried out by extraction using 0.5 M NaCl and DM aqua respectively …