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Sarto Sarto
Departemen Teknik Kimia, Fakultas Teknik, Universitas Gadjah Mada, Jl. Grafika No.2 Kampus UGM, Yogyakarta, 55281
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Pengaruh Steam Pretreatment terhadap Degradasi Selulosa dan Limonen pada Limbah Jeruk dalam Produksi Biohidrogen Gita Khaerunnisa; Sarto Sarto; Sutijan Sutijan; Siti Syamsiah
Jurnal Rekayasa Proses Vol 12, No 1 (2018)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (424.584 KB) | DOI: 10.22146/jrekpros.31163

Abstract

This research presents the influence of steam pretreatment to orange waste and its effect on the production of biohydrogen. The steam pretreatments with various times of 2, 4, and 6 hours were applied to the samples. After the pretreatment, the samples were fermented for seven days, and the contents of cellulose, limonene, volatile fatty acid (VFA), and hydrogen were assessed on the days of 1, 2, 3, 5 and 7. Kinetic parameters of hydrogen production were evaluated using the modified Gompertz`s equation. The result of this research showed that the steam pretreatment significantly reduced the cellulose and limonene compounds. The content of cellulose in the substrate after 2, 4 and 6 hours pretreatment were 37.08%; 36.63%; and 15.95%, respectively. Moreover, the content of limonene after pretreatment of 2, 4, and 6 hours were 57.44 ppm; 38.80 ppm; and 36.11 ppm, respectively. Analysis of kinetic parameters of production of hydrogen showed that the maximum productions of hydrogen (Hmax) in the samples after pretreatment of 2, 4, and 6 hours were 11.492 mL; 52.612 mL; 22.345 mL, respectively. The maximum production rates (Rm) at specified pretreatment time (2, 4, and 6 hours) were 9.888 mL H2/hour; 10.008 mL H2/hour; 12.982 mL H2/hour and the lag phases were 49.689 hours; 24.742 hours; and 24.885 hours. The study elucidated that applying pretreatment for 4 hours gives the optimum condition for hydrogen production. A B S T R A KPenelitian ini mempelajari pengaruh steam pretreatment terhadap limonen dan selulosa yang terkandung pada limbah jeruk, dengan mengevaluasi dampaknya terhadap produksi biohidrogen. Steam pretreatment dilakukan dalam 3 variasi waktu, yaitu 2, 4 dan 6 jam. Kemudian proses fermentasi dijalankan selama 7 hari dengan pengambilan sampel dilakukan pada hari ke 1, 2, 3, 5 dan 7. Hasil dari penelitian ini menunjukkan bahwa steam distillation yang dilakukan untuk pretreatment pada substrat jeruk berpengaruh terhadap kondisi substrat, yaitu mengurangi kadar selulosa dan limonen. Kadar selulosa pada substrat setelah pretreatment 2 jam adalah 37,08%; 4 jam 36,63%; dan 6 jam 15,95%. Sementara kadar limonen setelah pretreatment 2, 4 dan 6 jam berturut-turut 57,44 ppm; 38,80 ppm; dan 36,11 ppm. Konstanta kinetika produksi hidrogen pada sampel dengan pretreatment 2, 4 dan 6 jam yang diperoleh dengan persamaan Gompertz termodifikasi adalah potensi produksi hidrogen (Hmaks) 11,492 mL; 52,612 mL; 22,345 mL, laju produksi maksimum (Rm) 9,888 mL H2/jam; 10,008 mL H2/jam; 12,982 mL H2/jam serta waktu adaptasi 49,689; 24,742; dan 24,885 jam. Perlakuan pretreatment pada sampel selama 4 jam menghasilkan produk paling optimal.
Kinerja dan Kinetika Produksi Biohidrogen secara Batch dari Sampah Buah Melon dalam Reaktor Tangki Berpengaduk Febrina Sarlinda; Sarto Sarto; Muslikhin Hidayat
Jurnal Rekayasa Proses Vol 12, No 1 (2018)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (502.844 KB) | DOI: 10.22146/jrekpros.33611

Abstract

Melon fruit waste with high sugar and water content is potential as a substrate for hydrogen production by dark fermentation. This study investigated the performance of biohydrogen production from melon fruit waste in a stirred tank reactor with initial concentration of 13100 mg sCOD/L, in room temperature, initial pH of 7 and controlling final pH at 5.5 by adding NaOH. The fermentation was carried out for 24 hours. The value of pH, volatile solid (VS), soluble chemical oxygen demand (sCOD), volatile fatty acid (VFA), biogas volume, hydrogen content, and cell concentration was analized every hour to determine the performance of reactor. Hydrogen content reached 16.20% with hydrogen production rate (HPR) of 458.12 mL/Lreactor/day in the standard temperature and pressure (STP) condition. Substrate consumption at the end of fermentation reached 24.61% of sCOD and 78.28% of VS. Metabolite products were dominated by acetate and butyrate with butyrate to acetate ratio of 7:6.  The kinetic of product formation was evaluated by the kinetic model of Gompertz. Meanwhile the kinetics of cell growth was approximated by logistics model  A B S T R A KSampah buah melon yang cukup melimpah dan kaya akan gula dan air sangat berpotensi sebagai substrat untuk produksi biohidrogen secara fermentasi gelap. Pada penelitian ini dipelajari kinerja produksi biohidrogen dari sampah buah melon menggunakan reaktor tangki berpengaduk. Konsentrasi awal substrat 13.100 mg sCOD/L pada suhu ruang, pH awal 7 dan dan dilakukan kontrol terhadap pH akhir fermentasi agar tidak turun lebih rendah dari pH 5,5 dengan penambahan NaOH. Fermentasi berlangsung selama 24 jam dan setiap jam dilakukan analisis terhadap pH, volatile solid (VS), soluble chemical oxygen demand (sCOD), volatile fatty acid (VFA), volume biogas, kadar hidrogen dan konsentrasi biomassa untuk mengetahui kinerja reaktor. Kadar biohidrogan yang diperoleh sebesar 16,20% dengan laju produksi hidrogen sebesar 458,12 mL/Lreaktor/hari pada keadaan STP. Konsumsi substrat pada akhir fermentasi mencapai 24,61% sCOD dan 78,28% VS. Produk metabolit dominan adalah asetat dan butirat dengan ratio butirat per asetat sebesar 1,2.  Kinetika pembentukan hidrogen dipelajari melalui model kinetika persamaan Gompertz. Sedangkan kinetika pertumbuhan sel didekati dengan model kinetika persamaan logistik.                                                                                               
Pengaruh Steam Pretreatment terhadap Degradasi Selulosa dan Limonen pada Limbah Jeruk dalam Produksi Biohidrogen Gita Khaerunnisa; Sarto Sarto; Sutijan Sutijan; Siti Syamsiah
Jurnal Rekayasa Proses Vol 12, No 1 (2018)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.31163

Abstract

This research presents the influence of steam pretreatment to orange waste and its effect on the production of biohydrogen. The steam pretreatments with various times of 2, 4, and 6 hours were applied to the samples. After the pretreatment, the samples were fermented for seven days, and the contents of cellulose, limonene, volatile fatty acid (VFA), and hydrogen were assessed on the days of 1, 2, 3, 5 and 7. Kinetic parameters of hydrogen production were evaluated using the modified Gompertz`s equation. The result of this research showed that the steam pretreatment significantly reduced the cellulose and limonene compounds. The content of cellulose in the substrate after 2, 4 and 6 hours pretreatment were 37.08%; 36.63%; and 15.95%, respectively. Moreover, the content of limonene after pretreatment of 2, 4, and 6 hours were 57.44 ppm; 38.80 ppm; and 36.11 ppm, respectively. Analysis of kinetic parameters of production of hydrogen showed that the maximum productions of hydrogen (Hmax) in the samples after pretreatment of 2, 4, and 6 hours were 11.492 mL; 52.612 mL; 22.345 mL, respectively. The maximum production rates (Rm) at specified pretreatment time (2, 4, and 6 hours) were 9.888 mL H2/hour; 10.008 mL H2/hour; 12.982 mL H2/hour and the lag phases were 49.689 hours; 24.742 hours; and 24.885 hours. The study elucidated that applying pretreatment for 4 hours gives the optimum condition for hydrogen production. A B S T R A KPenelitian ini mempelajari pengaruh steam pretreatment terhadap limonen dan selulosa yang terkandung pada limbah jeruk, dengan mengevaluasi dampaknya terhadap produksi biohidrogen. Steam pretreatment dilakukan dalam 3 variasi waktu, yaitu 2, 4 dan 6 jam. Kemudian proses fermentasi dijalankan selama 7 hari dengan pengambilan sampel dilakukan pada hari ke 1, 2, 3, 5 dan 7. Hasil dari penelitian ini menunjukkan bahwa steam distillation yang dilakukan untuk pretreatment pada substrat jeruk berpengaruh terhadap kondisi substrat, yaitu mengurangi kadar selulosa dan limonen. Kadar selulosa pada substrat setelah pretreatment 2 jam adalah 37,08%; 4 jam 36,63%; dan 6 jam 15,95%. Sementara kadar limonen setelah pretreatment 2, 4 dan 6 jam berturut-turut 57,44 ppm; 38,80 ppm; dan 36,11 ppm. Konstanta kinetika produksi hidrogen pada sampel dengan pretreatment 2, 4 dan 6 jam yang diperoleh dengan persamaan Gompertz termodifikasi adalah potensi produksi hidrogen (Hmaks) 11,492 mL; 52,612 mL; 22,345 mL, laju produksi maksimum (Rm) 9,888 mL H2/jam; 10,008 mL H2/jam; 12,982 mL H2/jam serta waktu adaptasi 49,689; 24,742; dan 24,885 jam. Perlakuan pretreatment pada sampel selama 4 jam menghasilkan produk paling optimal.
Kinerja dan Kinetika Produksi Biohidrogen secara Batch dari Sampah Buah Melon dalam Reaktor Tangki Berpengaduk Febrina Sarlinda; Sarto Sarto; Muslikhin Hidayat
Jurnal Rekayasa Proses Vol 12, No 1 (2018)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.33611

Abstract

Melon fruit waste with high sugar and water content is potential as a substrate for hydrogen production by dark fermentation. This study investigated the performance of biohydrogen production from melon fruit waste in a stirred tank reactor with initial concentration of 13100 mg sCOD/L, in room temperature, initial pH of 7 and controlling final pH at 5.5 by adding NaOH. The fermentation was carried out for 24 hours. The value of pH, volatile solid (VS), soluble chemical oxygen demand (sCOD), volatile fatty acid (VFA), biogas volume, hydrogen content, and cell concentration was analized every hour to determine the performance of reactor. Hydrogen content reached 16.20% with hydrogen production rate (HPR) of 458.12 mL/Lreactor/day in the standard temperature and pressure (STP) condition. Substrate consumption at the end of fermentation reached 24.61% of sCOD and 78.28% of VS. Metabolite products were dominated by acetate and butyrate with butyrate to acetate ratio of 7:6.  The kinetic of product formation was evaluated by the kinetic model of Gompertz. Meanwhile the kinetics of cell growth was approximated by logistics model  A B S T R A KSampah buah melon yang cukup melimpah dan kaya akan gula dan air sangat berpotensi sebagai substrat untuk produksi biohidrogen secara fermentasi gelap. Pada penelitian ini dipelajari kinerja produksi biohidrogen dari sampah buah melon menggunakan reaktor tangki berpengaduk. Konsentrasi awal substrat 13.100 mg sCOD/L pada suhu ruang, pH awal 7 dan dan dilakukan kontrol terhadap pH akhir fermentasi agar tidak turun lebih rendah dari pH 5,5 dengan penambahan NaOH. Fermentasi berlangsung selama 24 jam dan setiap jam dilakukan analisis terhadap pH, volatile solid (VS), soluble chemical oxygen demand (sCOD), volatile fatty acid (VFA), volume biogas, kadar hidrogen dan konsentrasi biomassa untuk mengetahui kinerja reaktor. Kadar biohidrogan yang diperoleh sebesar 16,20% dengan laju produksi hidrogen sebesar 458,12 mL/Lreaktor/hari pada keadaan STP. Konsumsi substrat pada akhir fermentasi mencapai 24,61% sCOD dan 78,28% VS. Produk metabolit dominan adalah asetat dan butirat dengan ratio butirat per asetat sebesar 1,2.  Kinetika pembentukan hidrogen dipelajari melalui model kinetika persamaan Gompertz. Sedangkan kinetika pertumbuhan sel didekati dengan model kinetika persamaan logistik.                                                                                               
Co-Authors Febrina Sarlinda Gita Khaerunnisa Muslikhin Hidayat Siti Syamsiah Sutijan Sutijan