Penelitian ini bertujuan untuk mengetahui interaksi perlakuan penambahan molase dan penggunaan aerator pada proses fermentasi bioslurry kotoran sapi dan untuk mengetahui perlakuan terbaik pada proses fermentasi bioslurry kotoran sapi sesuai dengan persyaratan teknis minimal pupuk organik cair No.70./Permentan/SR.140/10/2011. Penelitian ini menggunakan rancangan acak kelompok faktorial dengan dua faktor dan tiga taraf perlakuan. Faktor pertama adalah penambahan 0, 2 dan 3 persen molase dan faktor kedua adalah penggunaan aerator 0, 1 dan 2. Masing-masing perlakuan diulang sebanyak tiga kali. Parameter yang diamati adalah suhu, biochemical oxygen demand, pH, total dissolved solids, electrical conductivity, C-organik, N-total, rasio C/N dan warna bioslurry. Hasil penelitian menunjukkan bahwa interaksi perlakuan penambahan molase dan penggunaan aerator berpengaruh pada proses fermentasi bioslurry kotoran sapi. Interaksi perlakuan penambahan molase 2 - 3 persen dengan penggunaan aerator 1-2 dapat mempercepat proses fermentasi bioslurry kotoran sapi dari 15 hari menjadi 10 hari. Hal ini ditandai dengan nilai biochemical oxygen demand yang sudah menurun pada hari ke 10 fermentasi. Dari sembilan perlakuan pada proses fermentasi bioslurry kotoran sapi, penambahan molase 3 persen dengan penggunaan 2 aerator merupakan perlakuan yang terbaik yaitu, menghasilkan total dissolved solids 6270 ppm, electrical conductivity 3,36 mS, C-organik 6,75 persen, N-total 0,44 persen, rasio C/N 15,82 dan warna hitam. Hasil ini sudah sesuai dengan standar No.70/Permentan/SR.140/10/2011. Namun, untuk kandungan N-total bioslurry belum cukup memenuhi standar Permentan yaitu 3 - 6 persen.
Garbage is often a problem, especially in big cities. The average amount of waste in Indonesiais 64 million tons / year, while the number of landfills in Indonesia is around 400 with a landfill capacitythat can accommodate 233 kg / day. Not to mention the unpleasant odor and dirty city views causediscomfort. This is where a solution is needed by leading to the use of technology in an effort tocreate a clean environment by reducing the level of waste accumulation and reducing waste litteredwith the Internet of Things technology. This tool is able to monitor the height of waste and gas contentvia the web. The internet system uses the MCU Node module with energy supply from solar cells.Working voltage of the control system is 5V, a stepdown module is needed to reduce the batteryvoltage from 12V to 5V. Detection of the height of waste using a PING sensor and to determine thelevels of methane gas using the sensor MQ-135. From testing at Student Center LT 4, it was foundthat the garbage accumulated on Saturday by 60 cm with 126 PPM methane gas levels that indicatedunhealthy. This monitoring system can last up to 7 days because it uses solar cells, but this canexperience changes due to the intensity of the sun.
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