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All Journal AL-MAKTABAH JURNAL AIR INDONESIA JURNAL TEKNOLOGI LINGKUNGAN Khizanah al-Hikmah : Jurnal Ilmu Perpustakaan, Informasi, dan Kearsipan Jurnal Kajian Informasi & Perpustakaan JIIP (Jurnal Ilmiah Ilmu Pendidikan) Jurnal Teknologi Lingkungan Perwira Journal of Community Development (PJCD) BACA: Jurnal Dokumentasi dan Informasi
agus rifai
Uin Syarifhidayatullah Librarian
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Library & Information Science Mathematics Other

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Pengaruh Interval Waktu Panen terhadap Produksi Biomassa Chlorella sp. dan Melosira sp. untuk Penangkapan Karbon secara Biologi Prayitno, Joko; Rahmasari, Iklima Ika; Rifai, Agus
Jurnal Teknologi Lingkungan Vol. 21 No. 1 (2020)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.286 KB) | DOI: 10.29122/jtl.v21i1.3777

Abstract

ABSTRACTThe aim of this study was to determine the effect of harvesting frequency on the growth of Chlorella sp. and Melosira sp. and on their total biomass production to estimate the amount of carbon fixed during 11 days of culture. Chlorella sp. and Melosira sp. were cultured in f/2 medium in seawater. The biomass was harvested at harvesting intervals of every day (P1), every 2 days (P2) and every 3 days (P3). The biomass of Chlorella sp. harvested at P1, P2 and P3 were 0,49 g/L, 0,43 g/L, and 0,35 g/L, respectively. The highest total biomass production of Chlorella sp. after 11 days of cultivation was obtained from P1 (8,80 g/L), while total biomass production at P2 and P3 were 52% (4,59 g/L) and 30% (3,25 g/L) of that P1, respectively. The biomass harvested at P1, P2 and P3 were 2,41 g/L, 1,40 g/L, and 1,63 g/L. Total biomass production of Melosira sp. during 11 days of cultivation for P1, P2 and P3 were 34,56 g/L, 17,33 g/L, 11,20 g/L, respectively. Our results showed that the highest total biomass production of both Chlorella sp. and Melosira sp. were obtained from harvesting every day. The estimated value of CO2 bio-fixation based on biomass production by Chlorella sp. and Melosira sp. were 1,5 g/L/day and 5,9 g/L/day, respectively.Keywords: biomass, microalgae, Chlorella sp, harvesting interval, Melosira sp, carbon capture ABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh interval waktu panen biomassa mikroalga terhadap pertumbuhan Chlorella sp. dan Melosira sp., dan perolehan total biomassanya untuk estimasi CO2 yang difiksasi selama kultur 11 hari. Chlorella sp. dan Melosira sp. dikultivasi dalam media air laut yang berisi nutrien f/2. Biomassa mikroalga dipanen dengan interval waktu panen tiap hari (P1), tiap 2 hari (P2) dan tiap 3 hari (P3). Sebagai kontrol (P0), biomassa mikroalga dipanen hanya pada akhir percobaan yaitu di hari ke-11. Kelimpahan sel kultur Chlorella sp. pada perlakuan P1, P2 and P3 masing-masing adalah 2,38x106 sel/mL, 2x106 sel/mL,1,5x106 sel/mL, sedangkan total biomassa yang diperoleh masing-masing adalah 0,49 g/L, 0,43 g/L, dan 0,35 g/L. Total produksi biomassa Chlorella sp. tertinggi yang diperoleh selama 11 hari kultivasi dijumpai pada perlakuan P1 (8,80 g/L), sedangkan total produksi biomassa pada P2 dan P3 hanya 52% (4,59 g/L) dan 30% (3,25 g/L) dari total biomassa P1. Kelimpahan sel Melosira sp. yang dipanen dengan interval P1, P2 dan P3 masing-masing adalah 4,28x106 sel/mL, 2,22x106 sel/mL, dan 2,36x106 sel/mL, dan biomassa yang diperoleh masing-masing adalah 2,41 g/L, 1,40 g/L, dan 1,63 g/L. Total produksi biomassa Melosira sp. yang diperoleh selama 11 hari kultivasi untuk perlakuan P1, P2 dan P3 masing-masing adalah 34,56 g/L,17,33 g/L, dan 11,20 g/L. Hasil percobaan ini menunjukkan bahwa total produksi biomassa tertinggi pada Chlorella sp. dan Melosira sp.dijumpai pada kultur yang dipanen setiap hari. Estimasi serapan karbon berdasarkan biomasa yang dihasilkan oleh Chlorella sp dan Melosira sp. masing-masing adalah 1,5 g/L/hari dan 5,9 g/L/hari.Kata kunci: biomassa, mikroalga, Chlorella sp., interval panen, Melosira sp., penangkapan karbon
KAJIAN PENDAHULUAN KELAYAKAN PENERAPAN INSTALASI PENGOLAHAN AIR LIMBAH DOMESTIK SECARA KOMUNAL DI PERMUKIMAN KOTA BOGOR Rifai, Agus; Nugroho, Rudi
Jurnal Air Indonesia Vol. 3 No. 2 (2007): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (113.215 KB) | DOI: 10.29122/jai.v3i2.2335

Abstract

A preliminary assessment of an application of sewerage system with Upflow Anaerobic Sludge Blanket (UASB) and Down flow Hanging Sponge (DHS) technology was conducted inNorth Bogor. The Problem which often emerge in management of domestic wastewater is the limited land area and fund to built and operate a wastewater treatment facility. To overcome such problem, it is needed to develop a cheap wastewater treatment technology with high efficiency, easy to operate and also should be compact. The combination technology of UASB and DHS is proposed as an economic wastewater treatment which  easy to handling. Therefore, to make sure that the technology is feasible or not to be built inNorth Bogor, there is need the preliminary assessment. The assessment was conducted through a survey of technical and social economic aspect. The results show that sewerage system using UASB and DHS technology is feasible. Key word: domestic wastewater, upflow anaerobik sludge blanket, downflow hanging sponge, preliminary assessment.
KAJIAN KELAYAKAN EKONOMI RENCANA PEMBANGUNAN INSTALASI PENGOLAHAN AIR LIMBAH (IPAL) DOMESTIK KOMUNAL SISTEM UASB-DHS DI KOTA BOGOR Nugroho, Rudi; Rifai, Agus
Jurnal Teknologi Lingkungan Vol. 13 No. 3 (2012)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2348.49 KB) | DOI: 10.29122/jtl.v13i3.1396

Abstract

Air limbah rumah tangga merupakan salah satu potensi sumber pencemaran lingkungan . Berdasarkan Laporan JICA , 1995 pencemaran lingkungan di Jabodetabek adalah 80 % disebabkan oleh air limbah rumah tangga . Untuk meminimalkan pencemaran lingkungan, air limbah harus diperlakukan sebelum dibuang ke sungai . Masalah yang sering muncul dalam pengelolaan limbah domestik adalah luas lahan terbatas dan dana yang ada untuk membangun fasilitas pengolahan air limbah dan juga biaya operasional yang tinggi . Untuk mengatasi masalah tersebut, perlu pengembangan biaya rendah teknologi pengolahan air limbah dengan efisiensi penyisihan yang tinggi , mudah dioperasikan dan juga harus kompak . Sebuah teknologi kombinasi Upflow Anaerobic Sludge Blanket ( UASB ) dan aliran bawah Hanging Sponge ( DHS ) merupakan pengolahan air limbah ekonomi , mudah dioperasikan dan memiliki efisiensi penyisihan tinggi yaitu 98 % untuk BOD dan 99,8 % untuk bakteri . Namun, untuk membangun fasilitas pengolahan air limbah dengan menggunakan UASB dan teknologi DHS , perlu studi kelayakan . Makalah ini menjelaskan studi kelayakan ekonomi dan sosial dari penerapan teknologi pengolahan air limbah UASB dan DHS di Kota Bogor . Dengan perhitungan manfaat dan rasio biaya ( BCR ) , hasilnya menunjukkan bahwa BCR 2.13 . Ini berarti proyek pengolahan air limbah UASB dan DHS di Kota Bogor adalah layak. Kata kunci : air limbah rumah tangga , anaerobik selimut lumpur, studi sosial ekonom  AbstractDomestic wastewater is one of the potential sources of environment pollution. Based on the JICA Report, 1995 the environmental pollution in Jabodetabek was 80% caused by the domestic wastewater. To minimize the environmental pollution, the wastewater have to be treated before discharge to river. Problem which often emerge in management of domestic waste is the limited land area and existing fund to built a wastewater treatment facility and also the high operating cost. To overcome these problems, it needs development of low cost wastewater treatment technology with high removal efficiency, easy to operate and also should be compact. A combination technology of Upflow Anaerobic Sludge Blanket (UASB) and Downflow Hanging Sponge (DHS) represents an economic wastewater treatment, easy to operate and has high removal efficiency that is 98% for BOD and 99,8% for bacterium. However, to build the wastewater treatment facility by using the UASB and DHS technology, it needs a feasibility study. This paper explains an economic and social feasibility study of application the UASB and DHS wastewater treatment technology at Bogor City. By the calculation of benefit and cost ratio (BCR), the result shows that the BCR is 2.13. It means the UASB and DHS wastewater treatment project at Bogor City was feasible.
Dari Literasi ke Transliterasi: Gagasan Tentang Konsep Literasi Untuk Komunikasi Ilmiah di Perguruan Tinggi Rifai, Agus
AL-MAKTABAH Vol 19, No 2 (2020): Al-Maktabah
Publisher : Pusat Perpustakaan UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Perkembangan teknologi untuk komunikasi ilmiah, terutama di lingkungan perguruan tinggi menuntut perubahan konsep literasi. Literasi informasi yang diyakini memberikan pondasi bagi seseorang dalam kegiatan pengembangan keilmuan, menuntut kecakapan lain akibat perubahan lingkungan komunikasi keilmuan. Lingkungan teknologi digital telah menuntut para akademisi dan peneliti kampus tidak saja menguasai kecakapan literasi informasi, akan tetapi juga kecakapan lain, terutama kecakapan digital dan kecakapan data. Karena berbagai keterbatasan dan untuk menjamin kelancaran kegiatan komunikasi ilmiah, diperlukan kolaborasi strategis antara akademisi dan peneliti dengan perpustakaan akademik. 
KAJIAN PENDAHULUAN KELAYAKAN PENERAPAN INSTALASI PENGOLAHAN AIR LIMBAH DOMESTIK SECARA KOMUNAL DI PERMUKIMAN KOTA BOGOR Rifai, Agus; Nugroho, Rudi
Jurnal Air Indonesia Vol. 3 No. 2 (2007): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jai.v3i2.2335

Abstract

A preliminary assessment of an application of sewerage system with Upflow Anaerobic Sludge Blanket (UASB) and Down flow Hanging Sponge (DHS) technology was conducted inNorth Bogor. The Problem which often emerge in management of domestic wastewater is the limited land area and fund to built and operate a wastewater treatment facility. To overcome such problem, it is needed to develop a cheap wastewater treatment technology with high efficiency, easy to operate and also should be compact. The combination technology of UASB and DHS is proposed as an economic wastewater treatment which  easy to handling. Therefore, to make sure that the technology is feasible or not to be built inNorth Bogor, there is need the preliminary assessment. The assessment was conducted through a survey of technical and social economic aspect. The results show that sewerage system using UASB and DHS technology is feasible. Key word: domestic wastewater, upflow anaerobik sludge blanket, downflow hanging sponge, preliminary assessment.
Fungsi Pendukung Bukti Digital (Video dan Gambar dari Drone) dalam Upaya Penindakan Hukum Operasi Intelijen Kepolisian di Papua di Luar Peradilan Pidana Rifai, Agus; Myharto, Wiend Sakti
JIIP - Jurnal Ilmiah Ilmu Pendidikan Vol. 5 No. 4 (2022): JIIP (Jurnal Ilmiah Ilmu Pendidikan)
Publisher : STKIP Yapis Dompu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (688.356 KB) | DOI: 10.54371/jiip.v5i4.544

Abstract

Undang-undang hukum Indonesia, OPM, KKB dan/atau Teroris Papua bisa dikatakan sebagai organisasi yang dilarang beredar di Indonesia dikarenakan mengandung unsur makar menurut KUHP, teror terhadap aparat negara, tenaga kesehatan, fasilitas umum, fasilitas kesehatan dan kantor pemerintahan, maka kelompok tersebut sudah memenuhi pelanggaran tentang UU Terorisme.  Pemerintah secara sah melabeli kelompok ini dengan nama teroris Papua dan upaya penegakan hukum oleh Polri yang dibantu oleh TNI dalam penindakan di lapangan, dengan menggunakan Drone dan/atau Pesawat udara tanpa awak dalam operasi intelijen yakni pengumpulan, pencarian dan patrol udara untuk memperoleh petunjuk digital berupa video dan gambar sesuai dengan UU ITE mengenai alat bukti elektronik yang sah, yang diperoleh dari aparat penegak hukum yang berwenang secara sah, hal ini berkaitan dengan adanya UU nomor 2 Tahun  2002 tentang Kepolisian Negara Republik Indonesia dan asas legalitas yang menyatakan bahwa UU No. 11 Tahun 2008 tentang ITE dalam Pasal 54 ayat (1), maka untuk menggunakan data elektronik dapat dijadikan sebagai alat bukti yang sah, yang dilaksanakan dalam Operasi Intelijen di Satgas Nemangkawi Papua supaya lebih efektif dan efisien dan mengurangi jumlah aparat TNI dan Polri yang gugur di medan tugas.
Technology Adoption Among University Scholars: Institutional Repositories Case Study Rifai, Agus
Khizanah al-Hikmah : Jurnal Ilmu Perpustakaan, Informasi, dan Kearsipan Vol 11 No 2 (2023): December
Publisher : Program Studi Ilmu Perpustakaan UIN Alauddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/kah.v11i2a7

Abstract

The emergence of institutional repositories (IRs) is seen as a new scholarly publishing model. This study aims to understand the adoption of technology from the perspective of information behavior by exploring users' characteristics of information need, awareness, and need of IRs concerning the use of IRs. Three hundred university lecturers from six state Islamic universities were observed to obtain their perception of the need for IRs using a questionnaire survey. Partial least square structural equation modeling was used for data analysis. The analyses of measurement and structural models were conducted to validate the relationship between the observed variables. The study found that the information-seeking behavior model has partially explained the use of repositories among university scholars by 53,5%. The results mean that other factors influence the use of IRs that are not examined by this research.
Identifying information literacy skills of new graduate students Nuryaman, Nuryaman; Rifai, Agus
Jurnal Kajian Informasi dan Perpustakaan Vol 12, No 1 (2024): Accredited by Ministry of Education, Culture, Research and Technology of the Re
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jkip.v12i1.50081

Abstract

The UIN Syarif Hidayatullah Jakarta Graduate School Library organizes an information literacy program to create new students who are proficient in dealing with academic tasks. Understanding students' initial information literacy skills needs to be considered because it is input for developing information literacy programs that are more oriented toward student needs. This study aimed to identify the initial information literacy skills of new graduate students based on the Big6 Model. The research approach was quantitative with survey methods. A sample of 43 respondents was taken from a total population of 160 people using incidental techniques, namely students who were present in person at the 2022 Odd Semester New Student Orientation. Data was collected using a closed questionnaire with a Likert Scale. Data analysis and interpretation used descriptive statistics. The research results showed that the information literacy skills of new students were 70%, categorized as good. Students were confirmed to have evaluated search results at 74% while seeking strategies, and the use of information was at 68% and 69 (sufficient category). The condition of task definition and synthesis skills was 71%, location and access were 70%, with Google Scholar, Academia, and Moraref as the most frequently referenced sources of digital information; all three aspects were categorized as good. The preparation of search strategies and utilization of information sources is in the sufficient category. Therefore, these two aptitudes are considered to be the focus of academic library information literacy training in the future.
Pengaruh Tekanan pada Reverse Osmosis terhadap Penyisihan Kadar Ion Klorida (Cl-) dan Total Dissolved Solids (TDS) pada Pengolahan Air Payau Rifai, Agus; Hartaja, Dinda Rita Krishumartani; Sulaeman, Oman; Setiadi, Imam; Ikhsan, Iik Nurul; Darmawangsa, Muhammad Rizky; Ardiana, Citra; Sofian, Achmad; Yunus
Jurnal Teknologi Lingkungan Vol. 25 No. 2 (2024)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jtl.2024.705

Abstract

In the operation and maintenance of reverse osmosis (RO) systems, various challenges arise. One common issue faced is pressure fluctuations that can affect the quality of the produced water, shorten the lifespan of the membrane, and lead to system failure. This study aims to evaluate the performance of thin film composite spiral wound RO membranes in reducing Chloride ion (Cl-) and Total Dissolved Solids (TDS) levels in brackish water using low pressure. The RO membrane used in this research is made of polysulfone (PSF) with a thin film composite spiral wound type. The variables analyzed are the flow rate (Q) ranging from 1,000 to 2,000 mL/minute and the operational pressure (P) between 3.5 and 5 bar. The research results show that the RO membrane can reduce the Cl- level by 99.79% and TDS by 99.92% at a flow rate of 2000 mL/minute with an operational pressure of 5 bar. From the research findings, it can be concluded that an increase in operational pressure enhances the efficiency of reducing Cl- and TDS levels. This is due to the strong push on the feed that accelerates the salt penetration process through the membrane, which is then expelled through the retentate or wastewater stream. Abstrak Selama pengoperasian dan pemeliharaan sistem reverse osmosis (RO), berbagai tantangan muncul. Masalah yang umum terjadi adalah fluktuasi tekanan yang dapat mempengaruhi kualitas air yang dihasilkan, memperpendek umur membran dan menyebabkan kegagalan sistem. Penelitian ini bertujuan untuk mengevaluasi kinerja membran RO tipe thin film composite spiral wound dalam mengurangi kadar ion klorida (Cl-) dan TDS (Total Dissolved Solid) dalam air payau dengan menggunakan tekanan rendah. Membran RO yang digunakan dalam penelitian ini terbuat dari polysulfon (PSF) dengan jenis thin film composite spiral wound. Variabel yang dianalisis adalah laju aliran (Q) antara 1.000–2.000 mL/menit dan tekanan operasional (P) antara 3,5–5 bar. Hasil penelitian menunjukkan bahwa membran RO mampu mengurangi kadar Cl- sebesar 99,79% dan TDS sebesar 99,92% pada laju aliran 2.000 mL/menit dengan tekanan operasional 5 bar. Berdasarkan hasil penelitian, dapat disimpulkan bahwa peningkatan tekanan operasional meningkatkan efisiensi pengurangan kadar Cl- dan TDS. Hal ini disebabkan oleh dorongan kuat pada umpan yang mempercepat proses penetrasi garam melalui membran, yang kemudian dikeluarkan melalui aliran retenate atau air buangan.
Interdisciplinary Research Burden in Islamic Studies and Action from Academic Librarian Nuryaman, Nuryaman; Rifai, Agus
BACA: Jurnal Dokumentasi dan Informasi Vol. 45 No. 2 (2024): BACA: Jurnal Dokumentasi dan Informasi (Desember)
Publisher : Direktorat Repositori, Multimedia, dan Penerbitan Ilmiah - Badan Riset dan Inovasi Nasional (BRIN Publishing)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/baca.2024.4566

Abstract

Interdisciplinary research is increasingly recognized as a crucial approach to addressing the complexity of religious and social issues in regional and global contexts. However, the implementation of such research often encounters significant challenges, particularly in fields like Islamic Studies. Despite its potential, integrating diverse disciplines into Islamic Studies research is not always successful due to various obstacles. With their unique expertise and role as "connectors," academic librarians are well-positioned to facilitate this interdisciplinary growth. This paper examines the challenges faced in interdisciplinary research within Islamic Studies and explores the potential involvement that academic librarians can use to overcome these barriers. Researchers employ a literature-based method involving stages of designing, collecting, analyzing, and presenting research to examine the challenges in interdisciplinary studies. The results reveal two primary types of burdens: scientific and practical. Scientific burdens include limitations in researchers' knowledge, difficulties in integrating disciplines, and an overemphasis on the original discipline. Practical burdens include implementing interdisciplinary curricula, navigating bureaucratic procedures, accessing research facilities, finding relevant information sources, and preparing research proposals. Academic librarians play a crucial role in addressing these practical burdens by optimizing policies, providing relevant collections and access, and developing advanced facilities and services. The study concludes that for effective interdisciplinary research, it is essential to recognize and address these burdens, leveraging the support and resources provided by academic librarians to enhance the research process.
Co-Authors Achmad Sofian Andriyanti Ardiana, Citra Bhandari, Rahul Darmawangsa, Muhammad Rizky Hartaja, Dinda Rita Krishumartani Ikhsan, Iik Nurul Imam Setiadi, Imam JOKO PRAYITNO myharto, Wiend Sakti Nugroho, Prihasantyo Siswo Nuryaman Nuryaman Oman Sulaeman, Oman Rahmania Mustahidda Rahmasari, Iklima Ika Rudi Nugroho Rusuli, Muhamad Saufi Che Srisuk, Prattana SUGIHARTI YUNUS