Perbandingan Penurunan Bobot Sampah Organik Pada Pembuatan Kompos Menggunakan Metode Berkeley dan Takakura Serta Potensinya Sebagai Sumber Belajar Biologi
Abstrak Penelitian ini bertujuan membandingkan penurunan bobot sampah organik pada proses pengomposan menggunakan metode Berkeley dan Takakura serta mengkaji potensinya sebagai sumber belajar biologi. Penelitian ini menggunakan pendekatan kuantitatif dengan metode eksperimen melalui Rancangan Acak Lengkap (RAL) satu faktor yaitu metode pengomposan, dengan dua perlakuan dan tiga ulangan. Bahan yang digunakan sampah organik berupa sisa sayuran, daun kering, dan serbuk gergaji dengan penambahan aktivator EM4. Penurunan bobot ditentukan berdasarkan perubahan bobot awal dan akhir bahan hingga berakhirnya proses dekomposisi. Parameter pendukung selama proses pengomposan meliputi suhu, pH, dan kelembapan, sedangkan hasil akhir dianalisis berdasarkan suhu, pH, kelembapan, C-organik, N-total, dan rasio C/N. Hasil penelitian menunjukkan rata-rata penurunan bobot metode Berkeley sebesar 176,85 g/hari, lebih tinggi dibandingkan Takakura sebesar 146,30 g/hari. Namun uji One-Way ANOVA menunjukkan perbedaan tersebut tidak signifikan secara statistik dengan Sig 0,135 (Sig> 0,05). Karakteristik akhir kompos relatif sama. Berdasarkan SNI, nilai pH, kelembapan, dan N-total memenuhi persyaratan, sedangkan suhu, C-organik dan rasio C/N masih belum memenuhi persyaratan. Hasil penelitian berpotensi dimanfaatkan sebagai sumber belajar biologi dalam bentuk modul ajar pada materi Ekologi dan Lingkungan. Abstract This study aimed to compare the reduction in organic waste weight during the composting process using the Berkeley and Takakura methods and to examine its potential as a biology learning resource. This study employed a quantitative approach using an experimental method with a Completely Randomized Design (CRD) involving one factor, namely the composting method, with two treatments and three replications. The materials consisted of organic waste, including vegetable residues, dried leaves, and sawdust, with the addition of EM4 as an activator. Weight reduction was determined based on the difference between the initial and final weights of the materials at the end of the decomposition process. Supporting parameters monitored during the composting process included temperature, pH, and moisture content, while the final compost characteristics were analyzed based on temperature, pH, moisture content, organic carbon (C-organic), total nitrogen (N-total), and the C/N ratio. The results showed that the mean weight reduction using the Berkeley method was 176.85 g/day, which was higher than that obtained using the Takakura method (146.30 g/day). However, the One-Way ANOVA results indicated that this difference was not statistically significant, with a significance value of 0.135 (p > 0.05). The final characteristics of the compost produced by the two methods were relatively similar. Based on the Indonesian National Standard (SNI), the pH, moisture content, and total nitrogen values met the required standards, whereas temperature, organic carbon, and the C/N ratio did not yet meet the specified requirements. The findings of this study have potential applications as a biology learning resource in the form of a teaching module for topics related to Ecology and the Environment.