IoT-Based Real Time pH Monitoring of University of Mindanao’s Chemical Laboratory Wastewater

Abstract

Wastewater is a by-product of industrial and commercial facilities. If not treated, it could cause environmental and health problems. The proposed IoT-Based Real-Time pH Monitoring of wastewater can regulate the disposed waste through web browsers. The device has undergone several trials with wastewater from the chemical laboratory at different pH levels. It gave the signal to the solenoid motor to position either close when the pH level is more significant than pH 7.5 and less than pH 6.5 or open when the pH level is pH 6.5 to pH 7.5. The output's accuracy was measured using buffer solutions at different temperatures. It showed that the value of the pH level varied in temperature with significantly small changes. The system monitoring in the web browser captured the data every minute and saved it in a database for data comparison purposes. The device conformed to the Department of Environmental Natural Resources - Environmental Management Bureau (DENR-EMB) in the Philippines' standard permissible pH level (pH 6.0 to pH 9.0). Using an Arduino NANO microcontroller that served as a central processing unit and a Node MCU to connect the system to the internet, the equivalent output of an industrial pH meter was obtained, allowing the user to monitor the system at any time using a web browser.

PLC-SCADA Automation of Inlet Wastewater Treatment Processes: Design, Implementation, and Evaluation

“…Salem et al [15] developed an industrial IoT cloud-based model for real-time wastewater monitoring and controlling, which monitors the power of hydrogen and temperature parameters from the wastewater inlet that will be treated in the wastewater treatment plant, thereby avoiding impermissible industrial wastewater that the plant cannot handle. Morales and Lawagon [16] suggested an IoT system for monitoring the pH of wastewater in real-time using web browsers. This system allows for the regulation of waste disposal through web browsers.…”