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Abstrak :
Sampah organik sebagian besar berasal dari sampah makanan yang menyebabkan karakteristiknya memiliki konsentrasi nitrogen dan lemak tinggi, kelembaban tinggi. Limbah domestik di Indonesia memiliki karakteristik kandungan organik yang sesuai dengan kondisi anaerobik. Limbah minyak dan lemak dapat membantu dalam proses AD yang dijadikan sebagai ko-substrat. Penelitian ini bertujuan untuk menganalisis kinerja reaktor dry anaerobic digestion sampah makanan dan menganalisis pengaruh penambahan limbah minyak dan lemak terhadap kinerja reaktor dry anaerobic digestion. Penelitian dilakukan menggunakan Continuous Stirred Tank Reactor CSTR dengan volume terisi 400 L yang beroperasi pada suhu rata-rata 27,8 1,07oC. Penelitian operasi skenario pertama dilakukan dengan input substrat sampah makanan dengan Organic Loading Rate OLR 10 kg VS/m3 selama 43 hari dan diaduk menggunakan variasi intensitas pengadukan 30 rpm dan 60 rpm secara konstan. Operasi skenario kedua dilakukan selama 59 hari menggunakan substrat sampah makanan dan kotoran sapi banding limbah Fat Oil and Grease FOG dengan Organic Loading Rate OLR yang sama dengan skenario pertama dan diaduk menggunakan intensitas 30 rpm secara konstan. Hasil penelitian menunjukkan terdapat perbedaan yang signifikan antara input substrat sampah makanan dengan penambahan limbah minyak dan lemak.

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Organic waste mostly comes from food waste that has characteristics of high concentrations of nitrogen and fat, high humidity. Domestic waste in Indonesia has characteristics of organic content which is suitable with anaerobic conditions. Waste oil and fat can help in the process of AD which is used as co substrate. This research is intended to analyze the performance of dry anaerobic digestion reactor of food waste and analyze the effect of oil and waste addition on dry anaerobic digestion reactor performance. The research was conducted using Continuous Stirred Tank Reactor CSTR with a volume of 400 L applied at an average temperature of 27.8 1.07oC. The first scenario operation study was performed with food waste substrate input with Organic Loading rate OLR is 10 kg VS m3 for 43 days and stirred using constantly strirring intensity variation of 30 rpm and 60 rpm. The second scenario operation was conducted for 59 days using food waste and cow dung substrate of Fat Oil and Grease waste FOG with Organic Loading Rate OLR which is similar to the first scenario and stirred using constant 30 rpm intensity. The results of study showed that there was a significant difference between the input of food waste substrate with the addition of Fat Oil and Grease p.

Abstrak :
Organic waste mostly comes from food waste, which has characteristics of high concentrations of nitrogen and fat, and high humidity. Domestic waste in Indonesia has a high organic content, which is suitable for anaerobic conditions. Waste oil and fat can be used as co-substrates and are helpful in yielding biogas in an anaerobic digestion (AD) process. The aim of this research is to analyze the performance of a food waste dry anaerobic digestion reactor after the addition of fat oil and grease (FOG) waste. The research was conducted using a semi-continuous stirred tank reactor (SCSTR) with an active volume of 400 L, operated at an average temperature of 27.8±1.07oC. Two experimental scenarios were performed, using varying types of food waste, food waste with cow dung as substrate, and FOG waste as co-substrate. The experiment was conducted using an Organic Loading Rate (OLR) of approximately 10 kg VS/m3, with a constant mixing intensity of 30 rpm. The results show that there was a significant difference between the input of food waste substrate with and without the addition of FOG (p<0.05). The average reduction of volatile solids (VS) and chemical oxygen demand (COD) removal in the substrate input with FOG addition was higher than without the addition. The mean percentages of COD removal and VS reduction in the substrate input with FOG addition were 63.3±2.71% and 89.30±1.55%, whereas those for substrate input without FOG addition were 59.45±4% and 77.65±1.46%, respectively. The study concludes that the use of FOG as a co-substrate in a dry AD food waste reactor is not only beneficial in reducing FOG waste generation, but also has a significant impact on reducing COD and VS, which can enhance potential biogas yield.