Water Filter Automation System Using Fuzzy Logic Controller

Nowadays, most of the water filtering system is still operated manually where there is no automation in the backwash function and no activity to monitor water quality before and after filtering. The backwash function is a way to clean the filter media with clean water by changing the direction of the water flow, intending to clean the filter media from the dirt after the filtration process. Typically, the turbidity level of water must be below NTU 25 with pH value between 6-8. In this research, we develop a system to monitor turbidity levels on water filter tank and to perform automatic backwashing function. We apply Fuzzy Logic Controller to control the backwash process if the filter media is very dirty or very saturated, which is indicated by the turbidity level of water in the filter output exceeds the standard NTU limit. Besides, Fuzzy Logic Controller is also used to control water pH level and automatically close the inlet if the pH level is exceeding the standard value.