ONLINE WASTEWATER QUALITY MONITORING SYSTEM IN THE PULP & PAPER AND TEXTILE INDUSTRY: SENSOR NODE AND SINK NODE

• Main Author: Iqbal Fauzan Aulia, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/66401
• Institution: Institut Teknologi Bandung

ABSTRACT ONLINE WASTEWATER QUALITY MONITORING SYSTEM IN THE PULP & PAPER AND TEXTILE INDUSTRY: SENSOR NODE AND SINK NODE By Muhammad Iqbal Fauzan Aulia NIM: 13217051 (Bachelor’s Program in Electrical Engineering) Based on the National Sanitation Foundation Water Quality Index (NSF-WQI), in 2019, Indonesia's water quality index was only 52.62, which means it was on the poor-medium border. This could cause bad things for the sustainability of the environment and living things such as the death of aquatic animals, disruption of soil fertility, and disruption of human health. As one of the efforts to improve water quality, the government issued the Minister of Environment and Forestry of the Republic of Indonesia Regulation No. P.93 of 2018 and No. P.80 of 2019. In the regulation, several industries were required to implement a continuous wastewater online monitoring system. According to Article 14 of the regulation, the industries were required to install this system no later than two years after the regulation was enacted (August 2020). However, as of the writing of this document, many industries have not yet installed it. The high cost and technological limitations still limit the installation of this system. Therefore, a system that can answer the difficulties that occur is needed by reducing the burden of industry participation and financing. The purpose of this final project is to create a system that can read three of the parameters required by the Minister of Environment and Forestry of the Republic of Indonesia No. P.80 of 2019: pH, TSS, and NH3-N. This system is aimed at the pulp & paper and textile industries, two of the industries mentioned in the ministerial regulation. This system needs to be able to carry out readings continuously with reading intervals every one hour with a minimum of twenty valid data per day. The system must also be able to display readings on the user interface and provide warnings if the results deviate from quality standards. This system must also be flexible with its configuration and calibration features so that the system has good sustainability. This system must also have good environmental resistance. In this final project, the research begins by first formulating the problem. Secondly, a literature review that is relevant to the research topic and a review of field conditions at PT. Papyrus Sakti Paper Mill as one of the players in the pulp & paper industry was carried out. Thirdly, the technical specifications of the product that will be designed to solve the problems that have been formulated is determined. Fourthly, product design is carried out based on predetermined technical iv specifications. Fifthly, product design is implemented. Sixthly, product implementation is tested and analyzed. From working on this final project, a system has been successfully created that fulfills the above-mentioned objectives. The resulting system can be connected to five types of sensors: pH, NH3-N, electrical conductivity (converted to TSS), turbidity (converted to TSS), and temperature (as a corrector). This system consists of two main types of subsystems: Sensor Node and Sink Node. The Sensor Node, with ESP32 as its processor, obtains the raw data from the wastewater and sends it to the Sink Node. The Sink Node, with the Raspberry Pi 3 as its processor, further processes the data and displays the results. Sensor Node and Sink Node are connected via wireless communication modules, one of which is ZigBee. This system has several flexible features that can facilitate configuration and calibration without having to shut down the entire system, change wiring, and change source code. This system has good environmental resistance with the implementation of a protective casing that can withstand rainwater and sensor probes which some of them can be used continuously (pH, electrical conductivity, and temperature; turbidity and NH3-N sensors cannot be used continuously). The advantages of this product compared to other products available in the market are its more economical price and its flexibility which allows this tool to be used as a platform for monitoring other than wastewater. Keywords: electrical conductivity, NH3-N, pH, sensor, TSS, turbidity