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All Journal JURNAL TEKNOLOGI LINGKUNGAN JTERA (Jurnal Teknologi Rekayasa) Majalah Ilmiah Pengkajian Industri
Pertiwi, Astri
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Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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ULASAN TEKNOLOGI PRETREATMENT TERKINI LIMBAH CAIR POME SEBAGAI UMPAN DIGESTER BIOGAS Murti, Galuh Wirama; Pertiwi, Astri; Masfuri, Imron; Juwita, Asmi Rima; Adiprabowo, Arya Bhaskara; Dwimansyah, Ridho; Senda, Semuel Pati; Prasetyo, Dwi Husodo
JTERA (Jurnal Teknologi Rekayasa) Vol 4, No 1: June 2019
Publisher : Politeknik Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (958.298 KB) | DOI: 10.31544/jtera.v4.i1.2019.17-28

Abstract

Pengolahan anaerob merupakan teknologi efektif yang murah untuk mengolah limbah cair kelapa sawit (POME) menjadi biogas yang dapat dijadikan bahan bakar atau listrik. Yield biogas dapat ditingkatkan dengan menerapkan teknik pretreatment limbah POME sebelum menuju digester. Umumnya, teknik pretreatment ini adalah tahapan hidrolisis yang merupakan tahap pertama dari produksi biogas. Tujuan dari pretreatment ini untuk memecah padatan atau gumpalan komponen agar lebih mudah dicerna oleh bakteri. Studi ini berisi ulasan perbandingan keunggulan dan kelemahan beberapa metode pretreatment terkini termasuk dengan evaluasi biaya operasional yang sesuai untuk diaplikasikan pada pengolahan pretreatment limbah POME di PKS Sei Pagar. Berdasarkan hasil seleksi, teknik pretreatment dengan karakteristik limbah POME yang memiliki biaya operasional relatif rendah yaitu teknik ultrasonik dan ozonasi.
EVALUASI PLT BIOGAS TERANTAM COVERED LAGOON (CAL) 700 KW UNTUK PENGEMBANGAN PLT BIOGAS TIPE CSTR Rosyadi, Erlan; Rahmawati, Nurdiah; Pertiwi, Astri; Murti, Galuh Wirama; Fauzan, Naazi; Rini, Tyas Puspita; Muharto, Bambang; Bhaskara, Arya; Saputra, Hens
Majalah Ilmiah Pengkajian Industri Vol 13, No 3 (2019): Majalah Ilmiah Pengkajian Industri
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (772.901 KB) | DOI: 10.29122/mipi.v13i3.3844

Abstract

Production of Crude Palm Oil (CPO) is increasing from year to year and is predicted to reach 41.6 million tons per year in 2018. Each ton of CPO will produce 3,28 m3 of POME during the production process. Improper handling of POME, besides causing soil pollution and flying, will release methane gas that categorized as GHG. BPPT cooperate  with PTPN V utilized POME to produce biogas and then be converted into electricity in a Biogas Power Plant (PLTBg) in Terantam with a design capacity of 700 kW. The reactor used is a closed Anaerobic Lagoon (CAL) reactor equipped with a recirculation pump. From the evaluations, the technology chosen was not optimal from the operation, its evaluaed from the accumulation of cakes and sludge collected in the reactor which could be disturb during an anaerobic reaction. The next technology development will be carried out with the development of PLTBg in Sei Pagar using CSTR technology. At the same reactor capacity, CSTR has a faster HRT compared to CAL. CSTR is also easier in control of pH and temperature, also requires less land.Keyword : POME, Biogas, CSTR, Covered Lagoon, HRT, OLR
Simulasi Homogenitas Pencampuran Air Limbah Pabrik Kelapa Sawit dan Pengaruhnya Terhadap Pengolahan Awal di Kolam Ekualisasi Pilot Plant Biogas Sei Pagar Masfuri, Imron; Soleh, Soleh; Pertiwi, Astri; Muharto, Bambang; Priambodo, Trisaksono Bagus
Jurnal Teknologi Lingkungan Vol. 21 No. 2 (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 (1580.325 KB) | DOI: 10.29122/jtl.v21i2.3902

Abstract

ABSTRACTPalm oil mill effluent (POME) produced from palm oil mills is classified as waste that can pollute the environment and needs severe treatment because it still contains high BOD and COD. POME has the potential to be further processed to produce biogas products through the anaerobic digestion process. Anaerobic process of biogas production from Palm Oil Mill Effluent (POME) waste is a fermentation process which quite a long time. So it is necessary to have a POME pretreatment process for preparation before being fed into the biodigester reactor. It is aimed at considering optimum conditioning, good homogeneity, and preparing for the formation of gas products. One of the POME pretreatment steps was carried out in an equalization tank to be homogenized before entering the reactor. However, when passing the equalization process, there are indications of sedimentation or separation between liquid waste and dissolved solids. Thus, an attempt was made to carry out a stirring system so that homogeneity would occur with the agitator. Therefore, the POME conditions in all parts of the pond could be relatively similar. The stirring is one of the factors that influence microbial life. In this research, a stirrer design simulation will be conducted to determine the effectiveness of the stirrer and homogeneity of POME in equalization pond. Design is adjusted to the actual POME parameters according to results of the analysis carried out related to POME physical properties such as temperature, density, viscosity, pH, and flow rate. Conditions analyzed in the simulation are agitator speed, the direction of fluid flow, power consumption, and homogeneity of mixing.Keywords: agitator, mixing, equalization tank, homogeneity, POMEABSTRAKLimbah cair pabrik kelapa sawit (POME) yang dihasilkan dari pabrik pengolahan sawit tergolong limbah yang dapat mencemari lingkungan dan perlu penanganan serius, karena masih mengandung BOD dan COD tinggi. POME sangat berpotensi untuk diolah lebih lanjut untuk menghasilkan produk biogas melalui proses penguraian anaerob. Proses pengolahan air limbah pabrik minyak sawit menjadi biogas merupakan proses fermentasi anaerobik yang memerlukan waktu yang lama. Oleh karena itu, perlu adanya proses pengolahan awal POME untuk penyiapan sebelum diumpankan ke dalam reaktor biodigester untuk pengkondisian yang optimum, homogenitas yang baik, dan persiapan pembentukan produk gas. Salah satu pengolahan awal POME dilakukan di kolam ekualisasi untuk proses homogenisasi air limbah sebelum masuk ke dalam reaktor. Selama melewati kolam ekualisasi, ada indikasi terjadi pengendapan atau pemisahan antara limbah cair dengan padatan terlarut. Untuk itu, muncul upaya untuk melakukan sistem pengadukan agar tercapai kondisi homogen dengan menggunakan pengaduk agar kondisi POME di seluruh bagian kolam relatif sama. Adapun pengadukan merupakan salah satu faktor yang berpengaruh pada kehidupan mikroba. Pada penelitian ini akan dilakukan simulasi desain pengaduk yang untuk mengetahui efektivitas pengaduk dan homogenitas POME di dalam kolam equalisasi. Desain disesuaikan dengan parameter POME sesuai hasil analisis yang dilakukan terkait properti fisik POME seperti temperatur, densitas, viskositas, pH, dan laju alir. Kondisi yang dianalisis dalam simulasi adalah kecepatan putaran pengaduk, arah aliran fluida, konsumsi daya dan homogenitas pencampuran.Kata kunci: pengaduk, pencampuran, kolam ekualisasi, homogenitas, POME
APPLICATION OF TEMPERATURE CONTROL SYSTEMS AT THE CATALYST ACTIVATION STEP IN THE METHANOL TESTPLANT Adiprabowo, Arya Bhaskara; Pertiwi, Astri; Rahmawati, Nurdiah; Saputro, Frendy Rian; Valentino, Novio; Anindita, Hana Nabila; Septriana, Desy
Majalah Ilmiah Pengkajian Industri Vol. 15 No. 1 (2021): Majalah Ilmiah Pengkajian Industri
Publisher : Deputi TIRBR-BPPT

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

Abstract

Catalyst activation is an important step in methanol synthesis process, achieved by the reduction of CuO precursor producing Cu0 active sites.  Testplant’s temperature operation shall be maintainted at 220°C in order to maximize the CuO reduction process in the catalyst activation step. A temperature control system shall be applied in methanol testplant to maintain the temperature during reduction process, due to sensitivity of reduction process to temperature variation and possibility of disturbance such as change in gas flow rate which could affects the operating temperature. Temperature control systems are tested by using step response at the desired setpoint, which is 220°C at pre-heater and reactor and 60°C at sampling line. The tests are conducted by changing the setpoint value at temperature controller and previously stable flow gas in the system (disturbance rejection). The temperature control system proved to be able to response well during the test. In the end, methanol is produced from syngas, indicating catalyst activation success. Keywords: Catalyst Activation; Methanol Testplant; Temperature Controller
Co-Authors Adiprabowo, Arya Bhaskara Bhaskara, Arya Dwimansyah, Ridho Fauzan, Naazi Hana Nabila Anindita, Hana Nabila Hens Saputra Juwita, Asmi Rima Masfuri, Imron Muharto, Bambang Murti, Galuh Wirama Prasetyo, Dwi Husodo Priambodo, Trisaksono Bagus Rahmawati, Nurdiah Rini, Tyas Puspita Rosyadi, Erlan Saputro, Frendy Rian Semuel Pati Senda Septriana, Desy Soleh, Soleh Valentino, Novio