Personal computer is used as central control in a coagulations system in processing industrial liquid cesspool based on fuzzy logic controller. Using Moringa Oleifera lam as natural bio-coagulation, it will get results that can make the environment safe and il can produce chemical compound. It easier to be operated (fuzzy logic is adaptive to ward input variable) from the results of the treatment. It shows that the data in the sixth Heration system can operate well. Keyword: Fuzzy logic controller, Natural Coagulation.