Abstract:
Papaya seeds (Carica papaya) have an active component in the form of protein which can act
as a coagulant agent. This study aims to prepare, characterize and determine the effectiveness
of papaya seeds as a biocoagulant in removing turbidity from peat water. The method used is
coagulation-flocculation using jartest. Papaya seeds were extracted for 1 minute with aqua DM
(BPH2O-1) and 0.5 M NaCl (BPNaCl-1) respectively. 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 at coagulation pH (2, 3, 4 and 6). The results of 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) groups. BPH2O-1 and BPNaCl-1 have protein content of 0.46% and 0.83%. The
highest turbidity removal was in BPNaCl-1 which was 75.28% which was coagulated at pH 2 and
a dose of 2 g. The turbidity obtained complies with PERMENKES RI No. 32 of 2017.
