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This study aims to analyze the possibility of using geothermal energy as an alternative energy source for the egg incubator hatchery with capacity of 400 eggs. Geothermal resource used in the process of retrofitting has a temperature of 70°C with a maximum flow of 2 liters/s in accordance with the data of geothermal resources at Tangeung -Cibugur, Cianjur regency. Based on the results of the feasibility studies that have been done, the source of geothermal energy can be used for heating egg incubator in order to reach adequate incubation conditions (temperature 36 to 38.5 ° C and a relative humidity of 50-60%). In the process of retrofitting, the design of the incubator used is forced draft incubator. Its components are heat exchanger, fans, and a water tray. The type of heat exchanger that used is cross flow, one fluid mixed, one fluid unmixed. It uses a staggered arrangement of copper pipe as a heat exchange surface. Incubator with geothermal energy is well used by using 5 fans with volume flow rate 0,0094 -0,0141 m 3 /s on the condition of the inlet air temperature is 23-27°C and a minimum pipe temperature is 65°C.

Industry 4.0 era materials used by entrepreneurs should be recycled, environmentally friendly, renewable with less chemical content. Indonesia as a tropical country has a large land area with the potential to produce the largest natural fiber in the world. One opportunity that can be applied to the utilization of natural fibers in air filters that currently use dominant materials is synthetic fibers. natural fiber has the advantage because it does not contain toxic chemicals, local raw materials, and is easily produced. This research will analyze the mechanical and morphological characteristics of biological fibers that have great potential as pre-filter raw material. Analysis of mechanical properties through tensile strength testing for single fibers and morphological analysis through scanning electron microscopy (SEM). Tensile testing was the results are; palm oil has a tensile strength of 620 MPa; 998 MPa and 213 MPa flax coconut fiber. For the morphological test results from SEM analysis for ramie fiber, it looks solid without fiber holes; The fibers appear to be many small fibers bound to one another while coir fibers have many pore holes in one observed fiber.

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In line with economic growth, material requirements in the industrial sector will increase. Industries are required to use materials that are safe for human health, environmentally friendly and utilize local raw materials. Currently, industries in general still use synthetic materials based on petroleum residues that contain many hazardous chemicals. Therefore, natural fiber has the potential to be used as a substitute for synthetic materials, especially in Indonesia which is rich in natural fibers resources. This will have an impact on the socio-economy of the local community so that it can grow the rural economic sector. Natural fibers have high economic value that can be used for various raw material needs for strategic industries. A good natural fiber processing mechanism will produce products that can be marketed globally with guaranteed product quality. This research analyzes the effect of alkali treatment of ramie, sugar palm and coir fiber on the increase in mechanical properties of the fiber. The mechanical properties were analyzed through tensile strength testing of single fiber according to ASTM D3822 standard using a textechno favigraph machine. In addition, this research is supported by data from thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The results showed that the fibers that had been given an alkali treatment had better mechanical properties compared to untreated fibers. Increased tensile strength of fibers was observec after being treated with alkali for ramie 81%, sugar palm 52% and coir 56%. The advantage of this alkaline treatment method is that no heating is involved and the treatment procedures are more practical compared to other methods.