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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.
PELATIHAN DAN PEMBUATAN MATERI UJI KOMPETENSI (MUK) SKEMA PENANGGUNG JAWAB PENGOPERASIAN PENGOLAHAN AIR LIMBAH (POPAL) Hidayatulloh, Irwan; Budiastuti, Herawati; Soeswanto, Bambang; Kusumawati, Endang; Trirahayu, Dhyna Analyes; Paramitha, Tifa; Ramadhani, Laily lsna; Elizabeth, Lidya
Jurnal Difusi Vol. 7 No. 2 (2024): Jurnal Difusi
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/difusi.v7i2.5561

Abstract

Ada 5 (lima) unit kompetensi dari draft skema okupasi Penanggung Jawab Pengoperasian Pengolahan Air Limbah (POPAL) yang sedang dibuat dan sekaligus akan diberikan dalam pelatihan bagi guru-guru SMK Negeri 7 Bandung oleh dosen-dosen Teknik Kimia, Politeknik Negeri Bandung. Unit kompetensi yang dimaksud yakni Mengoperasikan Instalasi Pengolahan Air Limbah (IPAL), Menilai Tingkat Pencemaran Air Limbah, Melakukan Perawatan IPAL, Mengidentifikasi Bahaya Pengolahan Air Limbah, dan Melakukan Tindakan Keselamatan Kerja terhadap Bahaya dalam IPAL. Dengan demikian para asesor di kedua institusi pendidikan ini dapat memiliki kompetensi dalam membuat MUK dimana MUK menjadi persyaratan wajib dalam pengusulkan draft skema yang akan diajukan untuk dilisensi oleh Badan Nasional Sertifikasi Profesi (BNSP) Indonesia. Hingga saat ini, terdapat beberapa kegiatan yang telah dilaksanakan. Pertama, koordinasi dan pertemuan telah dilakukan dengan pihak mitra untuk sinkronisasi pelaksanaan kegiatan. Kedua, koordinasi internal tim PkM untuk membahas pembagian tugas, rencana pembuatan MUK, dan rencana pelaksanaan pelatihan bagi para peserta pelatihan. Ketiga, merupakan pelaksanaan pelatihan mengenai pembuatan MUK unit kompetensi 1 dan 2. Keempat, merupakan lanjutan pelakasanaan kegiatan pelatihan mengenai pembuatan MUK untuk unit kompetensi 3, 4 dan 5.
Pengaruh Variasi Komposisi Dan Ukuran Partikel Terhadap Kualitas Briket Tempurung Kelapa Dan Cangkang Kemiri Yasinta, Fatima; Zahra, Salma Amara; Budiastuti, Herawati; Taufiqurohim, Teguh
Chemical Engineering Journal Storage (CEJS) Vol. 5 No. 05 (2025): Chemical Engineering Journal Storage (CEJS)-October 2025
Publisher : LPPM Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/cejs.v5i05.22969

Abstract

Briket merupakan sumber energi alternatif berupa bahan bakar padat yang terbuat dari campuran biomassa. Sumber biomassa yang cukup melimpah salah satunya adalah tempurung kelapa dan cangkang kemiri. Tempurung kelapa memiliki kandungan selulosa sebesar 34% dan hemiselulosa sebesar 21%, sedangkan cangkang kemiri memiliki kandungan holoselulosa sebesar 49,22%. Penelitian ini bertujuan untuk menganalisis pengaruh variasi komposisi dan ukuran partikel terhadap kualitas briket yang terbuat dari campuran tempurung kelapa dan cangkang kemiri. Ukuran partikel yang digunakan dalam penelitian ini 60 mesh, 70 mesh, dan 80 mesh. Variasi komposisi tempurung kelapa dan cangkang kemiri rasio 1:3, 1:1, dan 3:1 dengan massa briket 50 gram. Bahan perekat yang digunakan adalah campuran tepung tapioka dan air dengan konsentrasi 10%. Proses karbonisasi dilakukan pada suhu 400ºC selama 90 menit, pengepresan briket dengan hydraulic press bertekanan 5 ton/cm2 selama 7 menit, dan pengeringan briket dengan suhu 65ºC selama 24 jam. Briket dengan komposisi tempurung kelapa:cangkang kemiri dengan rasio 3:1 dan ukuran partikel 70 mesh menghasilkan nilai parameter uji terbaik dengan diperoleh nilai kalor sebesar 6.373 kal/g, kadar air 2%, kadar abu 2%, kadar zat mudah menguap 43,5%, densitas 1,258 g/cm³, dan kadar karbon terikat 52,5%. Parameter tersebut dibandingkan berdasarkan nilai standar dari SNI 06-3730-1995 dan SNI 01-6235-2000.
Sintesis Biodiesel dari Limbah Biji Alpukat melalui Proses Esterifikasi dan Transesterifikasi Budiastuti, Herawati; Rahmawati, Aisyah Auliya; Susanto, Susy Mardiana; Trirahayu, Dhyna Analyes; Rusdianasari, Rusdianasari
Fluida Vol. 16 No. sp1 (2023): FLUIDA x IRWNS Special Edition
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16isp1.5342

Abstract

The avocado seed is a food waste that contains vegetable oil. The amount of avocado seed waste is very abundant, but there is no optimal processing or utilization. Fossil fuels as an energy source can experience scarcity because these energy sources are non-renewable. This research has important implications in waste management and development of renewable energy sources. One type of renewable energy is biodiesel. Biodiesel is an environmentally friendly alternative fuel made from vegetable oil. The use of biodiesel as an alternative fuel has advantages including being easier to decompose in nature and reducing emissions when compared to diesel oil. One type of plant that can be used as raw material for making biodiesel is avocado. This study aims to utilize avocado seed waste as a raw material for biodiesel synthesis and to test its characteristics that have not been found in previous studies in the form of analysis of acid value, density, and oxidation stability. The method used in the synthesis of biodiesel was esterification and transesterification reactions using methanol solvent with a mole ratio of avocado seeds to methanol of 1:6 and the addition of H2SO4 catalyst as much as 0.5% of the weight of oil for the esterification process and the addition of NaOH catalyst as much as 1% of the weight of oil for the transesterification process. This study complements previous research on biodiesel from avocado seeds and compares the obtained biodiesel characteristics to the Indonesian National Standard (SNI) 04-7182:2015. The final results of this study were 34,61%, 0.98 mg-KOH/g, 977 kg/m3, and 318 minutes for biodiesel yield, acid value, density, and oxidation stability, respectively.
Co-Authors Agustin, Delliana Ahmad Fudholi Ajie Nurhasyim Alviera Wilma Fitrianie Ananda Dea Maharani Angela, Santa Bambang Soeswanto Devita Utami Mardiani Efniarsi S. Panggalo Elis Sri Wahyuni Elizabeth, Lidya Endang Kusumawati Haryadi Haryadi Hasna Mutiara Safitri Hidayatulloh, Irwan KURNIASETIAWATI, ANNISA Luthfiana Nurfauziah Melina Melina Miranti Nur Arafah Muhari, Emma Hermawati Mukhtar Ghozali Nabila, Salma Ainun Nancy Siti Djenar Nanda Ravenia Amanda Nindhytia Anandy Berliany Nira Aulia Hanifah Nurunnisa Alfi Hidayat Paramitha, Tifa Rachmawati, Anissa Nurul Raden Sukmawati Rahmawati, Aisyah Auliya Ramadhani, Laily Isna Ramadhani, Laily lsna Ririn Rismawati Robby Sudarman Rusdianasari Rusdianasari Rusdianasari Rusdianasari Rusmana Sapto Prayogo Sudrajat Harris Abdulloh Susanto, Susy Mardiana Taufiqurohim, Teguh TINA MULYA GANTINA Trirahayu, Dhyna Analyes Widiastuti, Endang YANTI SUPRIANTI, YANTI Yasinta, Fatima Yurike Dwiayu Rahmaningsi Zahra, Salma Amara