The increasing municipal solid waste can cause environmental pollution problems. The organic fraction is the largest component of municipal solid waste, reaching 75%, mostly around 61% from kitchen waste. One method to reduce the impact of pollution from municipal waste by processing it into Refused Derived Fuel (RDF) with bio-drying method. The combination of osmosis process treatment by soaking organic waste in a NaCl solution before the biodrying process can speed up the drying process. Immersion was carried out for four days. Every day the water content analysis was carried out by weighing. This paper provides an effect evaluation of 5%, 15%, and 25% NaCl solution as osmosis media on reducing the organic waste's water content. The organic waste are simulated using tomatoes, water spinach, cooked rice, and tofu. The higher the NaCl concentration (maximum 25% studied), the greater the ability to reduce the water content, 25% in water spinach and 40% in tomatoes. In tofu and cooked rice, soaking in NaCl solution increased the water content by 20% and 100%, respectively.
Substrate atau media tanam aquascape adalah lapisan paling atas yang bersentuhan langsung dengan akar tanaman. Substrate Soil telah dilengkapi dengan nutrisi dalam merangsang pertumbuhan tanaman secara optimum. Penelitian ini bertujuan untuk membandingkan metode pemanasan menggunakan api dan sinar matahari terhadap ketahanan granul media tanam tanaman air. Dalam penelitian ini menggunakan metode basah dan metode kering dengan bahan pembantu yaitu arang. Dari hasil yang didapatkan menunjukkan bahwa pemanasan metode api lebih baik dibandingkan dengan metode sinar matahari. Hal ini dibuktikan dengan hasil perendaman substrate soil di dalam air menunjukkan bahwa soil dengan pemanasan api lebih tahan dari pemanasan sinar matahari. Hasil Analisa TDS pemanasan metode api memiliki nilai yang lebih rendah dibandingkan pemanasan metode sinar matahari yaitu sebesar 210 -340 mg/l untuk pemanasan metode api dan 300 -410 mg/l untuk pemanasan metode sinar matahari. Berdasarkan hasil menunjukkan bahwa pemanasan metode api memiliki hasil analisa yang sesuai untuk keberlangsungan ekosistem aquascape.
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