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All Journal International Journal of Renewable Energy Development KOVALEN: Jurnal Riset Kimia FLUIDA Jurnal Rekayasa Hijau International Journal of Applied Technology Research Industrial Research Workshop and National Seminar International Journal of Renewable Energy Development Serambi Engineering
Ramadhani, Laily Isna
Politeknik Negeri Bandung
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Evaluation of Counter Current Horizontal Screw Extractor’s Performance in Determining Leaching Equilibrium of Clitoria ternatea Anthocyanins Ramadhani, Laily Isna; Hidayatulloh, Irwan; Nurcahyo; Trirahayu, Dhyna Analyes
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 2 (2024): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i2.17005

Abstract

Anthocyanin compounds as natural coloring substances contained in Clitoria ternatea flowers have higher antioxidant activity than anthocyanins from other flower extracts. Obtaining anthocyanin extract from Clitoria ternatea flower can be done using the solid-liquid extraction method. The objectives of this study include making a leaching equilibrium diagram of Clitoria ternatea flowers and determining the optimum L/S ratio and the number of equilibrium stages in the counter current horizontal screw extractor. In the maceration process, a leaching equilibrium diagram is produced, which is then used to design and determine the number of equilibrium stages. The equilibrium diagram of anthocyanins from Clitoria ternatea flowers with a gradient slope to the right is in accordance with the literature so that the equilibrium diagram can be used in the design of the extraction unit and the calculation of the theoretical stage of the multi-stage extraction unit. Based on the equilibrium diagram, the Number of Transfer Units (NTU) of 4 stages and the Height of the Transfer Unit value of this process is 0.105 m.
Enhancing Tofu Wastewater Treatment Efficiency with Water Hyacinth Extract Addition in an Anaerobic Sequencing Batch Reactor Ramadhani, Laily Isna; Nabila, Salma Ainun; Angela, Santa; Budiastuti, Herawati
Fluida Vol. 18 No. 1 (2025): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v18i1.6164

Abstract

Tofu production results in wastewater containing high levels of organic matter. This wastewater needs to be treated before discharging into water bodies. Anaerobic wastewater treatment is capable to decompose organic compounds in wastewater and can produce biogas. Tofu wastewater has a low C/N ratio (6.51), so it needs to be increased by adding water hyacinth extract. The reactor used is an Anaerobic Sequencing Batch Reactor (ASBR) with cow rumen extract as a starter at a concentration of 7,995 mg MLVSS/L. The concentration of tofu wastewater used was 6,000 mgCOD/L, and water hyacinth extract was added at a concentration ratio of 15:2. This research aims to determine the reduction in COD and cumulative biogas volume gain during tofu wastewater treatment with the addition of water hyacinth extract. The parameters tested in the research were MLVSS, COD, pH, and cumulative biogas volume. The efficiency of reducing COD concentration at the operational stage with adding water hyacinth extract was 87.5%, while the reduction in COD concentration without adding water hyacinth extract was only 56.25%. The cumulative volume of biogas produced for 9 days of operation was 7,300 mL, while the ASBR operation without adding water hyacinth extract was 9,590 mL for 9 days.
Effect of Water Hyacinth’s Particle Size as Additional Substrate to the Leachate Anaerobic Bioreactor Ramadhani, Laily Isna; Widyabudiningsih, Dewi; Wirawan, Feri; Almarnugraha, Aditya; Setyaningrum, Sinta
Fluida Vol. 17 No. 1 (2024): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v17i1.5503

Abstract

Municipal solid waste leachate contains landfill-produced organic contaminants. Leachate with the high organic content pottentially pollute nearby waterways. The high content of pollutants in leachate is represented by the measured Chemical Oxygen Demand (COD) content. Therefore, leachate was carried out using the anaerobic method. The anaerobic approach was chosen because it can process high-organic waste and produce biogas, in which methane in biogas may be used as renewable energy. Leachate from old landfills is heavy in nitrogen, thus to optimize the anaerobic process, it must be mixed with high-carbon substrates. Water hyacinth, a fast-growing plant with a high carbon content, is a weed because it pottentially damage the ecosystem. This research begins by comparing the anaerobic reactor with a single substrate of leachate and a mixed substrate (leachate and water hyacinth). Water hyacinth was added with size variations of 1 mm; 5 mm; 10 mm; and 15 mm. From the four variations, the mixed substrate reactor had a higher COD reduction efficiency than the single substrate in all water hyacinth sizes. The optimum particle size of water hyacinth is 1 mm, resulted the highest COD reduction efficiency of 81% and the highest biogas cummulative volume of 4,230 mL. The addition of water hyacinth as an additional substrate statisticaly proven has a strong correlation to the increasing efficiency of COD removal compared to the biogas production.
Pengaruh Konsentrasi Hidrolisat Kulit Pisang Raja Terhadap Produksi Biohidrogen Menggunakan Escherichia Coli Melalui Dark Fermentation Atqiyaa, Millatul; Fitriani, Ana; Keryanti; Ramadhani, Laily Isna
Prosiding Industrial Research Workshop and National Seminar Vol. 16 No. 1 (2025): Vol. 16 No. 1 (2025): Prosiding 16th Industrial Research Workshop and National
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v16i1.6680

Abstract

Biohidrogen merupakan sumber energi terbarukan yang dihasilkan melalui proses biologis dan berpotensi menjadi alternatif pengganti bahan bakar fosil. Penelitian ini bertujuan untuk memproduksi biohidrogen melalui proses dark fermentation dengan menggunakan hidrolisat kulit pisang raja sebagai substrat dan bakteri Escherichia coli sebagai inokulum. Kulit pisang raja dihidrolisis secara enzimatis menggunakan enzim α-amilase dan glukoamilase, menghasilkan gula pereduksi dalam hidrolisat sebesar 7,60% (b/v). Variasi konsentrasi hidrolisat terhadap volume media fermentasi yang digunakan dalam proses fermentasi adalah 20%, 30%, 40%, dan 50% (v/v) pada suhu 37 °C selama 7 hari. Hasil penelitian menunjukkan bahwa pertumbuhan mikroorganisme E. coli meningkat seiring dengan peningkatan konsentrasi hidrolisat, dengan berat sel kering tertinggi pada konsentrasi 50% yaitu sebesar 2,59 g/L. Volume gas tertinggi dihasilkan pada konsentrasi hidrolisat 30%, yaitu sebesar 12,56 mL. Namun, analisis menggunakan GC-TCD menunjukkan bahwa gas biohidrogen tidak terdeteksi pada hasil fermentasi semua variasi konsentrasi. Hal ini mengindikasikan perlunya optimasi lebih lanjut terhadap kondisi fermentasi, termasuk pengendalian pH dan pemilihan mikroorganisme yang lebih sesuai, untuk meningkatkan produksi biohidrogen.
Co-Authors Affifah Asri Afiani Alifa Dewi Kirana Almarnugraha, Aditya Alyanissa Nurfadiya Ananda Dea Maharani Angela, Santa Apriyanti, Fitri Atqiyaa, Millatul Budiastuti, Herawati - Damayanti, Sri Ismiyati Dhyna Analyes Trirahayu Fitriani, Ana Ghinaa Annisa Khairani Hanifrahmawan Sudibyo Herawati Budastuti Herawati Budiastuti Hidayatulloh, Irwan Irwan Hidayatulloh Keryanti, Keryanti Luthfiana Nurfauziah Melina Melina Muhammad Mufti Azis Muhammad Mufti Azis Muhari, Emma Hermawati Nabila, Salma Ainun Nanda Ravenia Amanda Nurazizah, Annisa Nurcahyo Pullammanappalil, Pratap Ririn Rismawati Robby Sudarman Sabinna Azahra Suleman Setyaningrum, Sinta Sri Ismiyati Damayanti Sudibyo, Hanifrahmawan Sudrajat Harris Abdulloh Trirahayu, Dhyna Analyes Vini Ivania Pardeny Widyabudiningsih, Dewi Wiratni Budhijanto Wiratni Budhijanto Wirawan, Feri Yurike Dwiayu Rahmaningsi