Energy is an everlasting demand which sustains humanity and its activity throughout the world. The main problem energy for all country is still using fossil energy. Using fossil energy caused pollution and contaminate environment. Adopting Ocean wave energy we can convert the wave into eco-green energy. Wave energy in Indonesia very abundant, it’s coastal line is 95,181 km number 2 in the world after Canada. The device that used to convert ocean wave energy into electrical energy is called WECs (Wave Energy Converters). Latterly, there are many kinds of WECs that already developed by an engineer. Pendulum system is one sample of WECs, its has uncomplicated working principle. Zamrisyaf is The man who first invented the device in 2010. Recently, the researcher still haven’t found the parameter of pontoon geometry that can afford a good sea keeping for this WECs. In this research, the authors has been performed using experimental approach to test the pendulum system. The purpose of this study is to analyze the novel geometry of pontoon that identical to trimaran that can produce a large amplitude of pendulum oscillation through an experimental approach. The analyzed aspect is the combination of outrigger length, outrigger height, pendulum rod length, pendulum mass, and wave periods which have a maximum amplitude of pendulum oscillation. The analysis results show that the better solution is pontoon thus has outrigger height of 40 mm, pendulum rod length of 106.7 mm, outrigger length of 413 mm, pendulum mass of 20, and wave periods of 0.8 s have a maximum amplitude of pendulum oscillation as big as 60 degrees.

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Biokonversi oleh larva Black Soldier Fly (BSF) menjadi metode pilihan untuk pengolahan sampah organik. Metode ini meliputi proses reduksi jumlah sampah yang dihasilkan masyarakat, pembentukan kompos dari residu sampah yang tidak terdegradasi oleh BSF, dan pertumbuhan larva BSF yang dapat digunakan untuk pakan hewan. Penelitian ini dilakukan untuk mengevaluasi seberapa besar pengaruh komposisi sampah dan feeding rate terhadap tingkat reduksi dan biokonversi sampah. Variabel penelitian berupa (i) komposisi sampah, yakni campuran 30% sampah sisa makanan (SM) dengan 70% sampah sayur (SY) atau sampah buah (B) atau sampah kebun (K), dan (ii) feeding rate (20, 35, dan 50 mg sampah organik/larva.hari). Penelitian ini dilakukan pada skala laboratorium selama 12 hari dengan menggunakan 300 ekor larva/bioreaktor. Hasil penelitian menunjukkan bahwa larva yang diberi campuran SM:SY dapat menghasilkan persentase reduksi sampah paling tinggi (81,98%), diikuti oleh campuran SM:B sebesar 81,23%, dan SM:K  sebesar 42,71%. Ditinjau dari berat akhir larva, tingkat biokonversi tertinggi didapat pada campuran SM:B dan feeding rate 35 mg sampah/larva.hari, sedangkan tingkat biokonversi terendah didapat dari campuran SM:K dan feeding rate 50 mg sampah/larva.hari. Analisis protein menunjukkan bahwa semua larva BSF dari tiap campuran sampah layak dimanfaatkan sebagai pakan hewan, karena memiliki kandungan protein antara 34– 59%.Bioconversion method using Black Soldier Fly (BSF) larvae has become of great interest in organic waste treatment. This method comprises of the municipal waste reduction process, the compost production from undegraded waste, and the growth of BSF larvae that can be used further as animal feed. This study evalutes the effect of waste composition and feeding rate on the waste reduction and bioconversion level. The evaluations were done on some variables: (i) waste composition (30% food waste and 70% vegetables waste (SY) or fruit waste (B) or garden waste (K), (ii) feeding rate (20, 35, and 50 mg waste/larva.day).The experiments were conducted in a laboratory scale for 12 days using 300 larvae/bioreactor. The results show that the larvae that has been fed with SM:SY obtained the highest waste reduction (81.98%), followed by SM:B (81.23%) and SM:K (42.71%). Based on the final larvae weight, the highest bioconversion level was acquired on the SM:B composition and feeding rate of 35 mg waste/larva.day, whereas the lowest bioconversion was measured on the SM:K composition and feeding rate of 50 mg waste/larva.day. The protein analyses describes that all larvae are applicable for animal feed due to protein contents of 34–59%.