Dewi, Bekti Utami Putri2023-06-072023-06-072023-03PerpustakaanElfitrahttps://repository.unri.ac.id/handle/123456789/11002Papaya seeds (Carica papaya) are waste from papaya fruit which is thrown away by the community because they are considered useless. This study aims to prepare, characterize and determine the effectiveness of papaya seeds as a biocoagulant in removing color from peat water. Papaya seeds were extracted for 1 minute with each solvent aqua DM (BPH2O) and 0.5 M NaCl (BPNaCl). Characterization of biocoagulants was carried out by determining functional groups using FTIR and protein content using the Lowry test. Determination of the effectiveness of papaya seed biocoagulant performance was determined by a variety of coagulation methods (referring to two studies). The method used is coagulation-flocculation using jartest. The results of the FTIR analysis showed the presence of functional groups from the O-H (carboxylic acid), N-H (amine), C-H, C=O (carbonyl) and C-O (carboxylic acid) groups. The appearance of amine and carboxylic acid groups indicated the presence of protein in the papaya seed biocoagulant, both extracted with 0.5 M NaCl and aqua DM. The results of the analysis of protein levels BPNaCl-1 0.83% and 0.46% BPH2O-1. The optimum color removal for BPNaCl-1 (method 1) was 96.6 TCU.enpeat waterbiocoagulantpapaya seedArticle