Electronic Theses and Dissertation

Ketersediaan bahan bakar fosil kian menipis seiring bertambahnya populasi manusia. permasalahan ini dapat diatasi dengan bahan bakar dari biomassa, baik pemanfaatan langsung maupun melalui konversi menjadi bioarang. bioarang dapat ditingkatkan kerapatan massa dan energinya per satuan volume dengan dijadikan biobriket. penelitian ini memanfaatkan limbah kelapa muda menjadi biobriket melalui proses pirolisis dengan perekat biji jarak, yang bertujuan untuk menciptakan sumber energi berkelanjutan, mengurangi emisi karbon, dan mengelola limbah pertanian secara efektif. tahapan proses pirolisis menggunakan suhu 380, 430 dan 480℃. perekat biji jarak dengan variasi 15%, 20% dan 25%. efektivitas perekat biji jarak dalam menghasilkan biobriket berkualitas diuji berdasarkan parameter nilai kalor, kadar air, kadar abu, volatile matter, fixed carbon, densitas, dan laju pembakaran. selain itu, penerapan duncan's multiple range test (dmrt) digunakan dalam analisis varians (anova) untuk mengevaluasi perbedaan signifikan antara berbagai kelompok perlakuan biobriket dengan melihat p-value lebih kecil dari signifikansi α = 5% atau α = 0,05. hasil uji sifat fisik dan kimia perlakuan optimal (t2k3, suhu 430°c, perekat 25%) menghasilkan bioarang dengan nilai kalor 6,421 kcal/g, kadar air 6,1%, kadar abu 7,6%, volatile matter 7,7%, fixed carbon 78,7%, densitas 0,9 g/cm³, dan laju pembakaran 0,1 g/s. berdasarkan uji statistik lanjut ditemukan pengaruh interaksi perlakuan terhadap kualitas biobriket adalah nilai kalor, kadar abu, densitas dan laju pembakaran. sementara itu kadar air dan fixed carbon berpengaruh dengan sesama jenis perlakuan (one way) suhu dan perekat terhadap kualitas biobriket. variabel volatile matter tidak menunjukkan pengaruh yang signifikan terhadap perlakuan yang diberikan. kata kunci : limbah kelapa muda; pirolisis; perekat; duncan's multiple range test

The availability of fossil fuels is depleting as the human population continues to grow. This issue can be addressed through biomass-based fuels, either by direct utilization or by conversion into bio-charcoal. The energy density and mass of bio-charcoal per unit volume can be enhanced by processing it into biobriquettes. This study utilizes young coconut waste to produce biobriquettes through a pyrolysis process with the addition of Jatropha seed (Jatropha curcas) as a adhesive. The aim is to create a sustainable energy source, reduce carbon emissions, and effectively manage agricultural waste. The pyrolysis process was conducted at temperatures of 380°C, 430°C, and 480°C, with adhesive variations of 15%, 20%, and 25%. The effectiveness of Jatropha seed adhesive in producing high-quality biobriquettes was evaluated based on several parameters, including calorific value, moisture content, ash content, volatile matter, fixed carbon, density, and burning rate. Additionally, Duncan’s Multiple Range Test (DMRT) was applied in analysis variance (anova) to assess significant differences between biobriquette treatment groups by identifying P-values lower than the significance threshold of α = 5% or α = 0.05. The results of the physical and chemical property tests indicate that the optimal treatment (T2K3, temperature 430°C, binder 25%) produced biobriquettes with a calorific value of 6,421 kcal/g, moisture content of 6.1%, ash content of 7.6%, volatile matter of 7.7%, fixed carbon of 78.7%, density of 0.9 g/cm³, and burning rate of 0.1 g/s. Advanced statistical analysis revealed that treatment interactions significantly affected the quality parameters of biobriquettes, including calorific value, ash content, density, and burning rate. Meanwhile, moisture content and fixed carbon have a one-way effect of temperature and adhesive on the quality of biobriquettes. On the other hand, the volatile matter variable showed no significant effect on the treatments applied.