MeSTErI Journal

ANALISIS KEPUTUSAN PEMILIHAN ALTERNATIF PENGOLAHAN LIMBAH CAIR DENGAN MENGGUNAKAN METODE ANALYTIC NETWORK PROSES (ANP)

Muhammad Robi Ramdani — Wed, 13 Jul 2022 00:00:00 +0000

The growth of palm oil production in Indonesia is increasing from year to year. In processing palm oil, not only Crude Palm Oil (CPO) and Palm Kernel Oil (PKO), palm oil mills also produce waste consisting of solid waste, liquid waste, and gas waste. This waste can have a negative impact on the environment. Several wastewater treatment technologies have been implemented in palm oil mills in Indonesia, but there has been no assessment of the best wastewater treatment technology to be applied in palm oil mills so that there is no negative impact on the environment. Therefore, an assessment of wastewater treatment technology at PT. PP London Sumatra Indonesia Tbk, using the ANP method. Determination of criteria and sub-criteria is built based on answers with open and closed questionnaires. The selection of this liquid waste treatment technology is done by providing an assessment based on the criteria and sub-criteria that affect the liquid waste treatment technology so that from these results we get the best alternative in wastewater treatment.

Perancangan Deteksi Banjir dan Peringatan Dini Via SMS dan Telepon Berbasis Arduino

Yua Afdianza chaniago — Wed, 13 Jul 2022 15:34:27 +0000

Flood is an unavoidable disaster that can happen at any time. Floods can occur due to prolonged rains or poor handling or disposal structures. In addition, flooding can also be caused by water sent from higher ground. Floods often occur slowly or quickly. The impact caused by floods always causes property losses and even fatalities. There are also 2 ultrasonic sensor working systems, namely at a water level of 2 cm. Then the ultrasonic sensor detects the water level, then the data is calibrated with the Atmega 328 Microcontroller which will be sent to the GSM Modem. The data is in the form of SMS and accompanied by a flood warning sound which is recorded in the DF player module. If the water level reaches the limit of 7 cm. Then the Atmega 328 Microcontroller sends SMS data and phone calls. Design and build a flood detection and early warning system using Arduino Atmega 328, ultrasonic sensor, power supply, GSM modem and Df player module. The working principle of the flood detection device is that when the power supply is supplied with current, the flood detection device starts to work by detecting the water level using an ultrasonic sensor. At a water level of 2 cm. The microcontroller sends an SMS warning of flood alerts and is accompanied by an alert sound. If the water level is more than 2 cm. The microcontroller sends a flood warning SMS and is accompanied by a flood warning sound. The program algorithm can be designed with the help of Arduino IDE software version 1.8.13 with a C language structure, then compiled and uploaded to the Atmega 328 chip, namely the Arduino Uno board.

Design of an Atmega 8 Microcontroller Based Earthquake Detection and Early Warning Alarm

Fajar syahputra; Ir. Yussa Ananda — Wed, 31 Aug 2022 00:00:00 +0000

Indonesia is a country whose geographical location is on the connecting line so that the country of Indonesia is one of the countries that are prone to earthquakes. Earthquake is an activity of the Earth, namely a shift or movement of the Earth's crust so that it will have an impact on life at the location of the earthquake. To know the occurrence of earthquakes at night when people are fast asleep. Earthquake detection equipment is needed. This tool works based on vibrations from the earthquake that make the pendulum sway. When the pendulum sways, the infrared sensor detects the vibration of the pendulum. After the infrared sensor detects the vibration from the pendulum, the ATmega 8 microcontroller sends data to the buzzer. Until the buzzer sounds. This tool uses an infrared sensor that functions to detect vibrations from the pendulum. This tool uses an ATmega 8 microcontroller which functions to process data signals from the infrared sensor to the buzzer. This tool uses a buzzer that functions as an early warning when an earthquake occurs. The design of an earthquake alarm system based on the AVR ATmega 8 microcontroller using an infrared sensor to activate the siren has been successfully carried out and runs as desired. The sensor test results show that the sensor sensitivity is quite good, namely with a slope sensitivity of 2 degrees. The earthquake alarm system made has a fairly sensitive and fast response in a matter of milliseconds when it detects a swing due to an earthquake. So it is very suitable to be applied to hotel buildings and so on.

PERANCANGAN MONITORING CUACA BERBASIS IoT TENAGA MATAHARI MENGGUNAKAN PANEL SURYA 20 WP

M Putra Fatahillah, Indra Roza — Wed, 31 Aug 2022 00:00:00 +0000

The internet has developed rapidly after the development of smartphone technology. Many internet applications can be accessed via a smartphone, for example looking for information, entertainment, social media, YouTube and so on. Internet of Things (IoT) technology is also growing rapidly by providing conveniences for developing it. This tool uses PLTS which functions to convert solar energy into electrical energy. This tool uses Arduino Uno which functions as a calibration of the temperature sensor, rain sensor and light sensor. This tool uses a temperature sensor that functions to detect air humidity. This tool uses a rain sensor to detect the presence or absence of rainwater. This tool uses the MCU node which functions as a data link from Arduino Uno to the server using wifi. When it's going to rain. The rain sensor will detect the presence or absence of rainwater. Then when it rains. The rain sensor will send data to Arduino Uno. Temperature sensor also when it rains. The temperature sensor sends data to Arduino Uno. If all data has been calibrated from the sensor. Then the data is sent to the smartphone. Via MCU nodes ESP8266.

RANCANG BANGUN SISTEM PEMBANGKIT LISTRIK TENAGA ANGIN PEMBARUAN MENGGUNAKAN TENAGA GENERATOR AC

Gunawan Aditya, Muhammad Safril — Wed, 31 Aug 2022 00:00:00 +0000

Advances in technology, especially electricity and electricity, always provide benefits for mankind. Electronic and computer technology is developing very rapidly along with advances in various fields. No less than that, discoveries in the field of renewable energy power conversion systems are also very rapid. Of the many types of generators, the wind energy conversion system is one of the simplest, most efficient and inexpensive systems. This tool uses an AC Generator which functions to convert mechanical energy into alternating electric power. This tool uses a rectifier that functions as a rectifier of electric waves. This tool uses a regulator that functions as a voltage stabilizer. This tool uses a battery that functions as a store of electric current. This tool uses LED that function as to indicate the status of electronic devices. The working principle of this tool. When the wind drives the wind turbine. Then the wind turbine rotates the generator and transmission. The transmission converts the motion of the wind into electrical voltage. The results of the conversion from the generator will be stabilized by the regulator. To store the electrical energy stored in the battery to turn on a 100 watt incandescent lamp.

PERANCANGAN ALAT PENETAS TELUR UNGGAS DENGAN ENERGI TERBARUKAN MENGGUNAKAN PANEL SURYA

Iwan, Ahmad Yanie, Dara Sawitri — Wed, 31 Aug 2022 00:00:00 +0000

In Indonesia the livestock sector plays an important role for economic growth, because the livestock sector is the driving force of development. The main problems faced by farmers are limited egg production and expensive electricity costs which affect farmers' income. The egg incubator designed for ornamental birds uses solar energy to save costs and is very environmentally friendly. This egg incubator has a power of 244 Wh for 24 hours and the current generated by the dc then the inverter converts the DC current to AC. To maximize the egg incubator, it is necessary to have a PLTS component and an egg incubator. The PLTS components installed are a 120 Wp solar panel to absorb sunlight and then convert it into electrical energy, a 10A solar charger controller to keep the battery from overcharging, a 12V/50Ah battery to store electrical power and a 500 W inverter to convert DC current into AC current. While the components installed in the egg incubator are the thermostat to control the temperature of the decorative chicken eggs which can be set at 37.5°C to turn on and 39°C to turn off the light power, a thermometer to find out the humidity in the decorative chicken eggs is around 52% -55%. , lighting 2 incandescent lamps with a total power of 10 watts, time delay relay to set the time for the stepper motor to move the egg rack for 1 minute every 3 hours and this tool is able to accommodate 50 eggs for 20-21 days. The research method used is solar panels absorb heat from the sun and then convert it into electrical energy and give current to the egg incubator. This egg incubator has a success rate of 90% and a failure rate of 10%. For testing the system has an average error sensor of 0.019°C and 0.01%.

Desain dan perancangan alat pantau energi listrik di rumah jarak jauh berbasis IoT

Arif Kurniawan Lubis, Dara Sawitri — Tue, 30 Aug 2022 00:00:00 +0000

The development of internet technology today is not only as a sender or transfer of data or files, internet technology can already be used to access physical objects such as hardware, for example sensors or motors and other electrical equipment. With this technology, it allows people to work remotely, for example controlling something or monitoring the data taken. Electrical energy measuring devices such as the kwh meter used by PLN record the calculation of the monthly electricity consumption from the house. Then an IoT-based remote monitoring device is needed to monitor electrical energy at home. The design of a remote monitoring device for electrical energy at home uses components such as the ACS 712 sensor which functions to detect electric current entering electrical components. ATmega 328 microcontroller which functions as a signal processing input from the sensor. And the output is LCD. LCD (Liquid Crystal Display) which functions as a display of values read by the sensor. MCU V3 which functions as displaying the value read by the sensor, then the data is sent to the cellphone using the internet network. The working principle of an electrical energy monitoring device. When an electric current flows into the power supply circuit. Then the ATmega 328 microcontroller processes data from the sensor. And the sensor detects incoming currents ranging from 0.45 A to 4.49 A. And the sensor detects output voltages ranging from 0.16 V to 2.25 V. If data from the sensor has been detected, the ATmega 328 microcontroller sends data to LCD and MCU V3 which functions as a display of data values from sensors. The program algorithm can be made in C language with the help of the Arduino IDE version 1.8.20 software. The program code is written in the editor then compiled and uploaded to the Arduino microcontroller. After completing the upload process, the program can be run on the Arduino microcontroller.

EFEKTIVITAS PEMBERIAN KOAGULAN DAN FLOKULAN TERHADAP PROSES PENJERNIHAN AIR DI PABRIK KELAPA SAWIT PT. PALMARIS RAYA MANDAILING NATAL

Aditya Syahputra, Denny Wallady Utama, Uun Novalia Harahap — Wed, 31 Aug 2022 00:00:00 +0000

In industrial activities, water has an important role in both production and non-production activities. The use of water in a palm oil mill requires around 5000m2 per day, so water treatment is needed to get good water quality. The purpose of this study was to determine the effectiveness of coagulant and flocculant administration in the water purification process at the palm oil mill of PT. Palmaris Raya Mandailing Christmas. This research was conducted at the Palm Oil Factory PT. Palmari Raya Mandailing Natal using the jar test method so that the optimum dose can be determined in the addition of coagulant and flocculant chemicals, besides that the jar test can also reduce pH and Turbidity levels in raw water. From the results of statistical tests using the paired simple test, it was found that 900 ppm of alum, 60 ppm of soda ash and 0.5 ppm of polymer could increase the pH from 6.83 to 7.6, the initial TDS of 50 mg/L increased to 80 mg/L. and can reduce the Fe content which was originally 2.88 to 0.03, the turbidity value from 29NTU to 0.51NTU and the color content from 73PtCo to 8Pitco. Where the jar test method shows that H0 is rejected where the p-value is <0.05, which means that there is a significant influence from the jar test analysis on the decrease in Fe, Turbidity and color as well as on the increase in pH and TDS. So that by adding chemicals in the raw water purification process at PT Palmaris Raya it can be used for the raw water purification process in the dry season.