#TITLE_ALTERNATIVE#

• Main Author: MENTARI (NIM 15304062), BUNGA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/10114
• Institution: Institut Teknologi Bandung

The conversion of cocoa fruit to dried cocoa beans generates cocoa pulp waste, which if it lets continuously and without further process, can generate the impact of environment especially land and waters as the exile place of waste, unwell aroma and also there will be natural fermentation from the microorganism ,which there are in the waste, and alcohol will be yielded. The objective of this research is to know about the optimatization of acetic acid formation resulting from cocoa pulp waste recovery process with minerals addition method. The process is run on anaerobic Circulating Bed Reactor which is made from flexyglass that have 4,5 liters capacities. Seeding and acclimatization are conducted until get a steady state condition, and then four reactors CBR-anaerobic will be operated at room temperature for 20 days. Both of the reactors are given with different minerals, reactor 1 is added by FeCl3, reactor 2 is added by CoCl2, reactor 3 is added by NiCl2 and reactor 4 is added by MnCl2. Checking of temperature, COD, VSS, alcohol concentration, acetic acid, TAV pH is done during the operation in 24 hours-basis. Gas analysis has performed on certain time period. Result of acetic acid analysis indicates that reactor 1 (with attendance of FeCl3) produce the highest concentration of acetic acid about 1.156,25 mg/L/days for rapid formation, while the reactor which with attendance of CoCl2 (reactor 2) produced the lowest acetic acid concentration about 681,252 mg/L/days for rapid formation. The O2 presence in the reactor affect acetic acid formation pathway and existence of H2 in the reactor would block acetic acid formation. <br />