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Pengaruh Penekanan Terhadap Kadar Air, Kadar Abu, Dan Nilai Kalor Briket Dari Sludge Biogas Kotoran Sapi Zeni Ulma; Murni Handayani; Arsita Nur Rizkia Putri; Choirunnisa Firdaus Ivana
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 3 No. 2 (2021): JPPL, September 2021
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v3i2.961

Utilization of biogas sludge waste from cow dung into briquettes is an alternative to reduce the use of fossil fuels. In the manufacture of briquettes made from biogas sludge, molasses is used as an adhesive which is a by-product of a sugar factory. In this study, variable compression briquettes with variations of 10, 15, 20, and 25 mm were used and further testing was carried out on the moisture content, ash content, and calorific value of the briquettes. The effect of briquette compression on the water content of the best briquettes according to the SNI standard (less than 8%) is at 10 mm compression variation with a moisture content value of 6.03%. Meanwhile, the effect of pressing briquettes on the ash content and calorific value is still above the SNI standard and requires further study.

Sosialisasi Pentingnya Persiapan Studi Lanjut Atau Bekerja Sebelum Kelulusan Bagi Siswa Smk (Smkn 2 Yogyakarta) Mukasi Wahyu Kurniawati; Zeni Ulma
Nusantara: Jurnal Pengabdian kepada Masyarakat Vol. 3 No. 2 (2023): Mei : Jurnal Pengabdian Kepada Masyarakat
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/nusantara.v3i2.1654

The socialization of the importance of advanced study preparation or employment before graduation for Vocational High School (SMK) students aims to provide profound understanding and strong motivation to students on the brink of graduation. The objective is to enable them to make meticulous and insightful assessments, leading to wise decisions about their educational trajectory, either in higher education or entering the professional world. This informative session takes place at State Vocational High School 2 Depok and is attended by students from the Petroleum and Petrochemical Processing Techniques (TPMP) department in grades 11 and 12. The well-executed event adheres to the predetermined plan and utilizes methods involving information dissemination and interactive discussions to engage participants in the targeted subject matter. The outcomes of this initiative involve an enhanced comprehension of the conveyed material and the cultivation of a robust motivational spirit within participants. The aim is to prepare them for the choices they will make after completing their education, encompassing the possibility of continuing studies at tertiary institutions or entering the workforce. Furthermore, participants gain a clearer insight into the steps involved in determining a career field that aligns with their interests and abilities, as well as choosing a college major that resonates with their competencies.

Identifikasi Kandungan Karbon dan Nitrogen pada Kotoran Sapi Feedlot Polije dan Kulit Pisang Saiful Anwar; Nur Faizin; Zeni Ulma; Risse Entikaria Rachmanita; Michael Joko Wibowo
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 6 No. 2 (2024): JPPL, September 2024
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v6i2.2405

Politeknik Negeri Jember has cow dung waste which needs to be utilized so that it does not pollute the environment. However, the C/N ratio of cow dung is 24. To optimize biogas production, raw materials that contain high carbon sources can be added. Banana peel is waste with a carbon content of 36%, so it is an alternative raw material that can be used to produce biogas. Analysis of total C from cow dung and banana peels was carried out using spectrophotometric methods. Total N analysis of cow feces and banana peels was carried out based on the Kjeldhal method. The sample weight for each type of material was made of 2 samples, for banana peel the weight of the samples made was 236 mg and 312 mg. Meanwhile, for cow feces, the sample weights were 223 mg and 291 mg. The average organic carbon obtained from banana peels is 2.413%, while the organic carbon in cow feces is 4.569%. This result was obtained by comparing the relationship between the sample's absolute standard and concentration against a graph. In the process of making biogas, the nitrogen content should not be excessive because this can result in the production of excess ammonia gas rather than methane gas. The average nitrogen content in banana peels and cow feces is 0.062% and 0.160% respectively. These results indicate that the nitrogen content in the sample is relatively very small so it has the potential to be used as a raw material for making biogas. The results of the organic carbon and nitrogen content in banana peels and cow dung were compared. The average value of the C/N ratio of banana peel is 39.158% and cow feces is 28.707%. These two results indicate that both samples have the potential to produce good biogas.

Optimalisasi Proses Degumming Minyak Biji Ketapang Menggunakan Asam Fosfat dan NaOH sebagai Bahan Baku Biodiesel Syabriyana, Maliya; Zeni Ulma; Ais Shenly Eka Putri Vinzani
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Ketapang seeds (Terminalia catappa) are a potential source of vegetable oil as a feedstock for biodiesel production. However, the use of ketapang seed oil remains very limited. Degumming is a crucial step in biodiesel production as it determines the quality of the raw material preparation. Various methods can be used to remove gum, including heating and the addition of acids (H3PO4, H2SO4 and HCl) or bases (NaOH). The aim of this study is to maximise the quality of biodiesel feedstock by improving the degumming efficiency using different concentrations of phosphoric acid (H3PO4) and NaOH. The phosphoric acid concentrations used were 0.5%, 1% and 1.5% v/v and the NaOH concentrations were 0.5%, 1% and 1.5% w/w. The degumming process was carried out at 80 °C with stirring for 30 min at each stage. After degumming, ketapang oil has excellent clarity compared to before treatment. Based on the research conducted, the optimum degumming conditions were found at a phosphoric acid concentration of 0.5% v/v and a NaOH mass of 1% w/w, resulting in an FFA content of 0.4% and a density of 902.5 kg/m³.

Identifikasi Kandungan Karbon dan Nitrogen pada Kotoran Sapi Feedlot Polije dan Kulit Pisang Saiful Anwar; Nur Faizin; Zeni Ulma; Risse Entikaria Rachmanita; Michael Joko Wibowo
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 6 No. 2 (2024): JPPL, September 2024
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M), Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v6i2.2405

Politeknik Negeri Jember has cow dung waste which needs to be utilized so that it does not pollute the environment. However, the C/N ratio of cow dung is 24. To optimize biogas production, raw materials that contain high carbon sources can be added. Banana peel is waste with a carbon content of 36%, so it is an alternative raw material that can be used to produce biogas. Analysis of total C from cow dung and banana peels was carried out using spectrophotometric methods. Total N analysis of cow feces and banana peels was carried out based on the Kjeldhal method. The sample weight for each type of material was made of 2 samples, for banana peel the weight of the samples made was 236 mg and 312 mg. Meanwhile, for cow feces, the sample weights were 223 mg and 291 mg. The average organic carbon obtained from banana peels is 2.413%, while the organic carbon in cow feces is 4.569%. This result was obtained by comparing the relationship between the sample's absolute standard and concentration against a graph. In the process of making biogas, the nitrogen content should not be excessive because this can result in the production of excess ammonia gas rather than methane gas. The average nitrogen content in banana peels and cow feces is 0.062% and 0.160% respectively. These results indicate that the nitrogen content in the sample is relatively very small so it has the potential to be used as a raw material for making biogas. The results of the organic carbon and nitrogen content in banana peels and cow dung were compared. The average value of the C/N ratio of banana peel is 39.158% and cow feces is 28.707%. These two results indicate that both samples have the potential to produce good biogas.

Analisis Mutu Briket Berbahan Baku Campuran Ampas Teh dan Sekam Padi Menggunakan Perekat Molase Menggunakan Metode Pirolisis Zeni Ulma; Nur Faizin; Reynadi Febri Afiandi
Journal of Sustainable Energy Development Vol. 1 No. 1 (2023)
Publisher : Petroleum Engineering, Faculty of Engineering, University of Jember

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This study aims to anayze the effect of molasses adhesive composition on the quaity of briquettes made from tea dregs and rice husks and to determine the characteristics of tea dregs and rice husk briquettes using molasses adhesive. The research was carried out through severa stages, namely the preparation of raw materias, drying of raw materias, pyrolysis of rice husks and tea dregs, raw materias mashed with a 40 mesh sieve, mixing of molasses adhesive, printing, drying and testing the characteristics of briquettes. The pyrolysis process takes 1 hour for the preparation of rice husks and 1.5 hours for the preparation of tea dregs with no or little air. The results showed that the best composition was TSM2 with a ratio of 30% tea dregs and 70% rice husks. The results of the study with the best composition, namely TSM2, caorific vaue 3771 ca/g, moisture content 9.28%, ash content 6.92%, density 1.16 g/cm3, kamba density 0.49 g/cm3, combustion rate 0.031 g/ s. TSM1 10% tea dregs charcoa and 90% rice husk charcoa caorific vaue 3399 ca/g, moisture content 8.94%, ash content 8.02%, density 1.51 g/cm3, kamba density 0.53 g/cm3, burning rate of 0.049 g/s and TSM3 50% tea dregs charcoa and 50% rice husk charcoa caorific vaue 4192 ca/g, moisture content 9.98%, ash content 6.85%, density 0.86 g/cm3, kamba density 0.43 g/cm3, the combustion rate is 0.025 g/s.

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