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All Journal Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Jurnal Dampak Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Abdi Laksana : Jurnal Pengabdian Kepada Masyarakat International Journal of Islamic Education, Research and Multiculturalism (IJIERM) Jurnal Pengabdian Fakultas Pertanian Universitas Lampung Journal Of Chemical Process Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN Nemui Nyimah
Dewi Agustina Iryani, Dewi Agustina
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Hidrolisis Ampas Tebu dengan Katalisator Asam Asetat untuk Memproduksi Furfural menggunakan Metode Steam Stripping Listiani, Nita; Iryani, Dewi Agustina; Rustamaji, Heri
Jurnal Rekayasa Kimia & Lingkungan Vol 11, No 2 (2016): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v11i2.4983

Abstract

Proses hidrolisis ampas tebu menggunakan asam asetat sebagai katalis dengan metode satu tahap (steam stripping) telah dilakukan. Ampas tebu sebanyak 50 gram dihidrolisis dalam 500 ml akuades yang mengandung katalis asam asetat sebesar 2 - 6% dengan variabel waktu selama 1 - 3 jam dan temperatur hidrolisis 110 - 120oC menggunakan metode steam stripping. Metode konvensional dilakukan dalam dua tahap yaitu pemasakan dan pemisahan dalam waktu tinggal tertentu, sehingga dapat menyebabkan degradasi furfural. Selain itu, energi yang digunakan sangat besar karena ada energi yang terbuang saat pendinginan produk. Maka peneliti mengembangkan proses hidrolisis hemiselulosa menjadi furfural sekaligus juga proses pemisahan yang dilakukan secara serempak dalam satu tahap yaitu dengan menggunakan metode distilasi steam stripping. Penelitian ini ditujukan untuk melihat apakah metode steam stripping dengan menggunakan katalis asam asetat efektif untuk digunakan dalam memproduksi furfural. Dalam studi ini juga dipelajari pengaruh waktu hidrolisis, konsentrasi katalis, dan temperatur terhadap konsentrasi furfural. Hasil uji menggunakan Response Surface Methodology (RSM) menunjukkan bahwa variabel yang paling berpengaruh untuk perolehan furfural adalah konsentrasi katalis dan temperatur. Hasil penelitian menunjukkan optimum dengan perolehan konsentrasi furfural tertinggi (6,038 mg/ml) di peroleh pada waktu 3 jam, temperatur 120C, dan konsentrasi katalis 6%. Hasil penelitian menunjukkan bahwa metode ini efektif untuk digunakan dalam produksi furfural.
Sintesis Furfural dari Bagas Tebu Via Reaksi Hidrolisa dengan Menggunakan Katalis Asam Asetat pada Kondisi Atmosferik Rossa, Nine Tria; Iryani, Dewi Agustina; Yuwono, Suripto D.
Jurnal Rekayasa Kimia & Lingkungan Vol 10, No 4 (2015): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v10i4.3314

Abstract

Telah dilakukan penelitian tentang hidrolisa bagas tebu menggunakan asam asetat sebagai katalis. Sebanyak 30 gram dihidrolisa dalam 300ml air yang mengandung katalis asam menggunakan asetat sebesar 7 sampai 9% v/v dengan variabel waktu dan temperatur hidrolisa selama 1 sampai 4 jam dan 80oC sampai 103oC pada kondisi atmosferik menggunakan reaktor tipe batch. Penelitian ini bertujuan untuk mengetahui pengaruh temperatur dan waktu hidrolisa, serta konsentrasi katalis asam asetat terhadap perolehan furfural. Kemudian untuk menemukan kondisi paling efisien untuk memproduksi furfural menggunakan Response Surface Methodology (RSM) dengan Software Design Expert 7.0.0. Hasil penelitian menunjukkan bahwa dengan penambahan waktu dan temperatur hidrolisa akan meningkatkan perolehan furfural. Perolehan asam asetat juga meningkat rata-rata hingga 2 kali dari konsentrasi asam asetat awal. Hal ini terjadi karena pemutusan gugus acetyl dari fraksi hemiselulosa pada bagas tebu. Perolehan kondisi optimum yakni pada waktu dan temperatur hidrolisa 2 jam dan 103oC, konsentrasi katalis 9%, dengan konsentrasi furfural 4,10 mg/ml dan konsentrasi asam asetat 2,62 mmol/ml.
Pemanfaatan Limbah Fly Ash dan Spent Bleaching Earth sebagai Substitusi Semen pada Beton Mutu Normal Skala Produksi Nababan, Otto Lambok Raya; Iryani, Dewi Agustina; Wahono, Endro Prasetyo; Rinawati, Rinawati
Dampak Vol. 20 No. 2 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.20.2.93-99.2023

Abstract

In the era of industry and technology in Indonesia, environmental problems due to waste are problems that require wise handling. Fly Ash (FA) waste from PLTU activities and Spent Bleaching Earth (SBE) waste resulting from the palm oil production process are very abundant, thus polluting the environment. Indonesia is currently prioritizing physical infrastructure development, which aims to improve connectivity and encourage economic growth in every sector. The development process that occurs increases the use of concrete. Concrete has a tremendous impact on the environment because most of its composition is cement. The use of cement in the manufacture of concrete results in the emission of large amounts of CO2 gas into the atmosphere, which causes an increase in global warming. The use of concrete can have a lower environmental impact if the use of cement is reduced as much as possible by adding a mixture of FA and SBE wastes. This research will utilize FA and SBE waste in the manufacture of normal concrete production weights and aim to determine the optimal composition of FA and SBE waste that is economically and environmentally feasible. The results of the research by applying FA and SBE substitutions show that FA is better than bleaching earth in the resulting compressive strength. The optimal composition of FA as a substitute for cement to achieve the quality of the planned concrete is 15%, while the composition of SBE as a substitute for cement is 10%. Keywords: concrete, Fly Ash (FA), Spent bleaching earth (SBE), concrete compressive strength  ABSTRAK In the era of industry and technology in Indonesia, environmental problems due to waste are problems that require wise handling. Fly Ash (FA) waste from PLTU activities and Spent Bleaching Earth (SBE) waste resulting from the palm oil production process are very abundant, thus polluting the environment. Indonesia is currently prioritizing physical infrastructure development, which aims to improve connectivity and encourage economic growth in every sector. The development process that occurs increases the use of concrete. Concrete has a tremendous impact on the environment because most of its composition is cement. The use of cement in the manufacture of concrete results in the emission of large amounts of CO2 gas into the atmosphere, which causes an increase in global warming. The use of concrete can have a lower environmental impact if the use of cement is reduced as much as possible by adding a mixture of FA and SBE wastes. This research will utilize FA and SBE waste in the manufacture of normal concrete production weights and aim to determine the optimal composition of FA and SBE waste that is economically and environmentally feasible. The results of the research by applying FA and SBE substitutions show that FA is better than bleaching earth in the resulting compressive strength. The optimal composition of FA as a substitute for cement to achieve the quality of the planned concrete is 15%, while the composition of SBE as a substitute for cement is 10%. Kata kunci: beton, Fly Ash (FA), Spent bleaching earth (SBE), kuat tekan beton      
Biogas Production from Palm Oil Mill Effluent and the Prospect of Co-digestion with Empty Fruit Bunches – A Comprehensive Review Setiawan, Afid Fito; Haryanto, Agus; Hasanudin, Udin; Triyono, Sugeng; Iryani, Dewi Agustina
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 5 (2025): October 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i5.1976-2005

Abstract

Palm oil mill effluent (POME) and oil palm empty fruit bunches (OPEFB) represent two major waste streams in the palm oil industry that pose serious environmental challenges but also offer significant opportunities for renewable energy generation. This review comprehensively discusses the development of biogas production from POME through anaerobic digestion (AD) and explores the prospects of co-digestion with OPEFB to improve system efficiency and sustainability. A systematic literature survey of over 150 publications from the past four decades was conducted to evaluate technological evolution, operational parameters, methane yield, and environmental implications. The review identifies five major phases of POME biogas development—from early feasibility studies in the 1980s to the current exploitation phase integrating energy recovery, carbon credit schemes, and circular bioeconomy principles. Anaerobic digestion of POME in covered lagoon systems has achieved COD removal efficiencies exceeding 90% and methane yields of 0.28–0.34 Nm³ CH₄ per kg COD removed, supporting electricity generation potentials above 1 GW nationwide. Meanwhile, co-digestion with OPEFB enhances process stability, optimizes the C/N ratio, and improves methane production by 20–40% depending on substrate ratio and pretreatment. The integration of POME–OPEFB co-digestion can substantially reduce greenhouse gas emissions and provide value-added biofertilizers, thereby strengthening the environmental and economic sustainability of palm oil mills. Despite technological advances, several challenges remain, including high investment cost, OPEFB pretreatment, and limited policy support for grid connection. Further development of scalable, low-cost digesters and biogas upgrading systems is essential to realize the full potential of biogas as a renewable energy pathway within the palm oil sector.
Diseminasi Alat Pemisah Pupuk Bioslurry dan Diseminasi Pengomposan Pupuk Bioslurry Padat-Kulit Kopi Sebagai Upaya Pengoptimalan Pengelolaan Kotoran Sapi Menjadi Biogas Sri Ismiyati Damayanti; Nawansih, Otik; Iryani, Dewi Agustina; Ginting, Simparmin Br
Nemui Nyimah Vol. 2 No. 2 (2022): Nemui Nyimah
Publisher : FT Universitas Lampung

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Abstract

Abstract: The dissemination of the bioslurry fertilizer separator and the dissemination of coffee husk-solid bioslurry fertilizer composting aims to introduce about the bioslurry fertilizer separator into solid and liquid phases, and introduce composting of solid bioslurry fertilizer with coffee husks which is proven to produce compost according to SNI. The specific target of this activity is that the community knows, understands, and has the skills to apply the introduced science and technology so that later they will be able to meet the organic fertilizer needs of their land. The methods used are: (1) Dissemination of the activity plan, (2) Providing materials related to science and technology that will be disseminated, (3). Training on the manufacture of solid-liquid bioslurry fertilizer separator and operation of the equipment, (4). Training on making compost from bioslurry solid fertilizer with coffee husks, (5). Evaluation of community activities. The target of this activity is the village community in general, community groups that have biogas digesters, and the Women Farmers Group (KWT). The location of the activity is in Kediri Village, Gadingrejo District, Pringsewu, Lampung. All activities have been carried out according to the method. Village communities as partners contribute in terms of manpower and consumption during the activity. There are almost no significant obstacles in the implementation of this activity. The outputs are a bioslurry fertilizer separator, a 500 liter capacity fertilizer mixer with a 7.5 pk diesel engine, a journal article, a patent article, and an activity videos that can be accessed on Youtube. Keywords: Bioslurry; Bioslurry Fertilizer Separator; Compost; Coffee Husks; Biogas
PELATIHAN PEMBUATAN PUPUK ORGANIK GRANUL (POG) BERBAHAN BAKU SLUDGE LUARAN DIGESTER BIOGAS SEBAGAI UPAYA PENGOPTIMALAN PEMANFAATAN DIGESTER BIOGAS PEDESAAN Nawansih, Otik; Damayanti, Sri Ismiyati; Taharuddin; Iryani, Dewi Agustina; Haviz, Muhammad; Ginting, Simparmin Br
Nemui Nyimah Vol. 4 No. 1 (2024): Nemui Nyimah Vol.4 No.1 2024
Publisher : FT Universitas Lampung

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Abstract

The solid bioslurry fertilizer (sludge) produced by the biogas digester has good quality, but is still less attractive to farmers because it is in bulk form. Therefore, it is necessary to carry out training regarding the granulation of sludge into granular organic fertilizer (POG). The long-term goal of this service is fertilizer independence at the farmer level, through the ability of farmers to process surrounding waste into more practical organic fertilizer. The specific target is that the public knows science and technology related to fertilizer granulation and has skills in granulating fertilizer. The methods used are: coordination of the lecturer team with the community regarding training activities, preparation of raw materials, namely sludge and compost made from sludge-coffee husk, socialization and discussion regarding fertilizer granulation science and technology, training in making POG, and evaluation of activities together with the community. Implementation of service begins with coordinating the lecturer team with the community regarding the implementation of activities, continues with the preparation of raw materials and tools with the assistance of residents and students, implementation of training with assistance from students by inviting pekon officials and the community, ending with an evaluation with the community to determine the sustainability of the program. The community is very interested in creating a village business with this organic fertilizer, which in the future can be managed by BUMDes. An obstacle during community service is the difficulty of gathering residents during the day due to various different activities.
Co-Authors Agus Haryanto Agus Haryanto Azhar Azhar Damayanti, Sri Ismiyati DARMANSYAH . Devi Permata Sari Eka Wahyu, Megananda Endro Prasetyo Wahono Febryanto, Indra Gumay Heri Rustamaji Herry Wardono Listiani, Nita Lukmanul Hakim M. Haviz Maria Erna Kustyawati Muhammad Hanif Nababan, Otto Lambok Raya Nine Tria Rossa, Nine Tria Otik Nawansih PERMADI, SIGIT Praja, Tondano Trisna Rani, Irma Tya Rengganis, Dyah Wulan Sumekar Rinawati Rinawati Risthy, Nisa Meutia Samsul Rizal Setiawan, Afid Fito Simparmin br Ginting Slamet Sumardi, Slamet Solly Aryza Sri Ismiyati Damayanti Sugeng Triyono Suripto D. Yuwono, Suripto D. Taharuddin Taharuddin Taharuddin Teguh Endaryanto Udin Hasanudin Wahyu Hidayat Widi Astuti