Pengaruh Penambahan Mixed Culture Bakteri Metanogen Terhadap Pengomposan Anaerobik Sampah Sisa Makanan

Khairunnisa, Chantika Fathia (2023) Pengaruh Penambahan Mixed Culture Bakteri Metanogen Terhadap Pengomposan Anaerobik Sampah Sisa Makanan. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Komposisi sampah terbesar di Indonesia adalah sampah sisa makanan. Sebagian besar sampah tersebut dibuang langsung ke TPA. Hal ini dapat menyebabkan lahan di TPA semakin terbatas. Sampah sisa makanan dapat diolah menjadi produk baru dengan proses pengomposan dan anaerobic digestion. Penelitian ini dilakukan untuk melihat pengaruh penambahan mixed culture bakteri metanogen terhadap proses degradasi sampah secara anaerobik. Mixed culture bakteri yang digunakan berasal dari pengolahan air limbah industri pabrik susu. Penambahan mixed culture bakteri ini sudah digunakan di beberapa TPA di Indonesia untuk mempercepat proses degradasi anaerobik sampah. Variabel yang digunakan dalam penelitian ini adalah perbandingan jumlah yang ditambahkan terhadap sampah dan frekuensi penambahannya. Jumlah mixed culture bakteri yang ditambahkan dihitung berdasarkan persentase berat mixed culture bakteri terhadap berat sampah, yaitu 10%, 30%, dan 50%. Variabel lain adalah frekuensi penambahan mixed culture bakteri, yaitu setiap 10 hari dan 15 hari dengan waktu penelitian 30 hari. Penambahan tersebut dilakukan di awal proses dekomposisi sampah mulai hari ke-0. Setiap variasi reaktor pada penelitian ini diduplikasi. Berdasarkan hasil penelitian, variasi penambahan mixed culture bakteri metanogen sebanyak 50% setiap 15 hari memiliki kecepatan proses degradasi sampah tertinggi ditinjau dari penurunan konsentrasi karbon organik. Variasi tersebut memiliki nilai konstanta terbesar, yaitu 0,0168 pada orde reaksi pertama. Kuantitas biogas yang dihasilkan pada penelitian ini semakin tinggi seiring meningkatnya persentase dan frekuensi penambahan mixed culture bakteri. Variasi penambahan MCB sebanyak 50% setiap 10 hari menghasilkan rata-rata volume biogas 7 kali lipat lebih tinggi dibandingkan reaktor kontrol, yaitu 6.500 ml/hari. Selanjutnya, untuk kualitas leachate ditinjau dari penurunan konsentrasi COD dan kenaikan nilai pH leachate. Variasi penambahan mixed culture bakteri metanogen sebanyak 50% setiap 15 hari menghasilkan konsentrasi COD paling rendah dan menurun secara kontinyu selama penelitian. Konsentrasi COD di akhir penelitian pada variasi tersebut adalah 21.600 mg/L. Konsentrasi COD tersebut memiliki persentase selisih terbesar terhadap kontrol pada waktu yang sama, yaitu sebesar 34,3%.
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The largest composition of solid waste in Indonesia is food waste and most of them disposed directly into landfill. This causes the landfill area to be more limited. Food waste can be processed into new products using composting and anaerobic digestion. This study was conducted to examine the effect of the addition of mixed cultures methanogen bacteria on the anaerobic waste degradation process. Mixed culture bacteria derived from wastewater treatment plant of dairy factory industries. The addition of mixed culture bacteria has been used in several landfills to accelerate the waste degradation process. Methanogens bacteria can decompose waste anaerobically and produce biogas with high composition of methane (CH4). The variables used in this study were the comparison of the amount added to the waste and the frequency of its addition. The quantity of mixed cultures bacteria added is calculated based on the percentage of mixed cultures weight to the solid waste weight, which is 10%, 30%, and 50%. Another variable is the frequency of mixed cultures bacteria added, which is every 10 days and 15 days with a study time of 30 days. The addition was carried out at the beginning of the waste decomposition process starting on day 0. Each variation of the reactor in this study was duplicated. Results of this study showed that the variation of adding mixed culture methanogen bacteria (MCB) as much as 50% every 15 days had the highest degradation process rate in terms of the organic carbon concentration decrease. The variation had the largest constant value, which was 6.146 on zero order reaction. The quantity of biogas produced in this study was getting higher along with the increasing percentage and frequency of MCB added. The variation of MCB 50% every 10 days resulted average biogas volume 7 times higher than the control reactor, which was 6,500 ml/day. Furthermore, the quality of leachate is reviewed from the decreasing of COD concentration and increasing of pH value. The variation of MCB methanogens by 50% every 15 days resulted in the lowest concentration of COD and decreased continuously during this study. COD concentration at the end of this study on that variation was 21,600 mg/L. The concentration of COD had the largest percentage difference to the control at the exact time, which was 34.3%.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	anaerobic digestion, biogas, lindi, mixed culture bakteri metanogen; anaerobic digestion, biogas, leachate, mixed culture methanogenic bacteria
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD756.45 Anaerobic treatment T Technology > TD Environmental technology. Sanitary engineering > TD767.7 Sewage sludge treatment and disposal T Technology > TD Environmental technology. Sanitary engineering > TD796.5 Composting
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Environmental Engineering > 25201-(S1) Undergraduate Thesis
Depositing User:	Chantika Fathia Khairunnisa
Date Deposited:	03 Aug 2023 05:56
Last Modified:	03 Aug 2023 05:56
URI:	http://repository.its.ac.id/id/eprint/99929

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