Analisis Mikro Struktur dan Gugus Fungsional pada Biochar dan Kompos Kotoran Sapi

Abstract

Cow dung waste is a material produced by cow digestion. In this case, livestock waste has the potential to be processed into compost and biochar. This difference in manufacturing methods will affect the resulting characteristics. The quality of compost and biochar can be identified through the Scanning Electron Microscope (SEM), Enerfy Dispersive X-ray (EDX), Brunauer Emmet Teller (BET), and Fourier Transform Infrared Spectroscopy (FTIR). Making biochar in the retort method is carried out at a temperature of 2250 C for 4 hours. Composting is carried out by anaerobic techniques for 3 weeks. This study aims to see the microstructural characteristics contained in compost and cow dung biochar and their functional groups. This analysis was carried out at the Soil Biology Laboratory, Faculty of Agriculture, University of North Sumatra and at the National Research and Innovation Agency (BRIN). The results showed differences in characteristics between cow dung compost and cow dung biochar retort method. The results of the pH analysis showed that cow dung compost had a pH of 7.03 and cow dung biochar retort method had a pH of 9.08. The results of the Scanning Electron Microscope (SEM) analysis show that the two have different morphological forms. The results of Energy Dispersive X-ray (EDX) analysis show that the most types of nutrients are found in biochar. The results of Brunauer Emmet Teller (BET) analysis show that biochar has a surface area 3 times larger at 28,620m2 / g compared to compost which is 8,458 m2 / g, but compost has a larger pore size of 24,811 (Å) compared to biochar which is 15,293 (Å). The results of the Fourier Transform Infrared Spectroscopy (FTIR) analysis show that cow dung compost has 17 wave peaks with 11 functional groups and biochar has 8 wave peaks with 6 functional groups.