In 2025, Indonesia has launched a zero-waste program. Towards a zero-waste program, of course, the community is given awareness in sorting and processing waste. Waste management is a common problem in urban or rural areas, along with the increase in population and people's lifestyles. Waste problems that are not handled properly can cause environmental problems (pollution of air, soil, and water) and public health. Based on the origin, waste is divided into organic and inorganic waste; organic waste is produced from biological materials that can be degraded by microbes or are biodegradable, or waste from fruit, vegetable, and leaf residues. This organic waste is the majority of the waste generated from households, so it is necessary to think about how to process it that is beneficial and efficient. One of these organic waste processing is processed into Eco enzymes, namely processing organic waste with molasses and water in a ratio of !:3:10. The organic waste processing process is first chopped to become a small part to facilitate the fermentation process. The automation of this chopping machine uses Arduino as a microcontroller, a load cell as a measure of the weight of organic waste, an electric motor as a driving force, a solenoid door lock as a lock for the organic waste load before grinding, and a knife as an organic waste count. The purpose of making this tool is to help chop organic waste in the process of processing eco enzymes. The research results on the automation of this organic waste chopper machine loadcell with a load of 1 Kg runs well; the solenoid door lock can hold organic waste to work well. The research results on the motor for upper milling are given a large torque equipped with a downward knife position and a pillow block so that the motor does not shake.

Air is an important factor in life and living. However, nowadays, in line with the development of industrial technology and transportation, air quality is also experiencing degradation caused by pollution in the cleanliness of the air, or as a result of a reaction to changes in the composition of normal air with pollutant substances (gas and dust particles) into it so that it interferes with the sustainability of the respiratory system. humans, animals and plants. Based on this, it is necessary to have a tool to monitor air quality. This study aims to create and develop an air quality monitoring tool using aerial drones. The tool is made using several sensors including the MiCS-6814 sensor to measure CO and NO2 gas, the MQ-135 sensor to measure SO2 gas, the GP2Y1010 sensor to measure the intensity of dust particulates, DHT-11 to measure temperature and humidity, and the ESP32 microcontroller to transmit data obtained to Blynk Apps via the internet. The results obtained, the MiCS6814 and MQ135 sensors did not catch any CO, NO2 and SO2 gas particulates in the air, the dust sensor got 46.31 ug/Nm3, and the DHT11 sensor got temperature of 27.1°C and a humidity of 46%.