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Indah Purnamasari
Department Of Chemical Engineering, Program Studi Teknologi Kimia Industri, Politeknik Negeri Sriwijaya, Jl. Srijaya Negara, Palembang
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PEMANFAATAN LIMBAH CUCIAN SEBAGAI SUMBER FOSFAT RAMAH LINGKUNGAN TERHADAP PERTUMBUHAN TANAMAN Rahmat Dwi Aprian; Fadarina; Indah Purnamasari
KINETIKA Vol. 12 No. 2 (2021): KINETIKA 01072021
Publisher : Politeknik Negeri Sriwijaya

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Abstract

The use of detergent in washing activities is increasing in line with the population growth rate every year. Laundry waste generated by the use of detergents contains active ingredients which are harmful to the health of living things and can damage the environment and cause eutrophication. One method of processing that can be used to treat laundry waste is by using activated carbon as an adsorbent. This study aims to determine the best conditions for treating laundry waste using activated carbon and to be able to utilize laundry waste as a source of phosphate for plant growth. Laundry waste is treated with the addition of activated carbon as much as 5, 10, 15 and 20 grams per one liter of laundry waste with a variation of time 20, 40 and 60 minutes and a constant stirring speed at 200 rpm. The parameters analyzed were pH, COD, BOD, phosphate concentration and the effect on the growth of chili plants observed for 9 weeks. The results showed that the pH level remained constant at a value of 7, and the BOD, COD and phosphate concentrations decreased to 53.6, 227.3 and 0.178 mg/L, respectively. The adsorption isotherm model is closer to the Freundlich isotherm model with R2 value of 0.9835-0.9998. And there is no significant effect on the provision of laundry waste after treatment on the growth of the tested plants.
SILIKON HASIL REDUKSI SILIKA DARI FLY ASH BATUBARA UNTUK PEMBUATAN HIDROGEN Eti Nurmahdani; Robert Junaidi; Indah Purnamasari
KINETIKA Vol. 13 No. 03 (2022): KINETIKA 01112022
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Coal fly ash waste is a mineral residue in fine grains produced from the coal burning process from the coal-fired power plant. Coal fly ash contains chemical elements including silica (SiO2) which reaches 40%. Silica has many benefits in the industrial world, one of which can be used as a material for making silicone (Si). The purpose of this study is to make silicon and purify the resulting silicon with variations in the amount of reducers, and the application of silicon to make hydrogen with NaOH variations. In this study silicon insulation used silica:magnesium variations in a ratio of 1:0.5; 1:0,8 and 1:1. Furthermore, the variation of NaOH in the manufacture of hydrogen with concentrations of 2 M, 2.5 and 3 M. The methodology used is silica extraction by precipitation method, silicon isolation by metallothermal method, silicon purification with HCl and hydrogen manufacturing with NaOH. Silicone making is carried out by reducing silica with magnesium which is then in a furnace for 3 hours with a temperature of 650°C. The best result obtained at silicone manufacturing is a ratio of 1:1 with an intensity of 1905 cps and the yield obtained reaches 92%. Si 1:1 was then used for the manufacture of hydrogen and obtained the largest volume of 0.97 liters with a gas content of 2.647 ppm. Keywords: Silicon, Silica, Coal Fly Ash, Hydrogen, Metalothermal Method
KINETIKA ADSORPSI LOGAM Cu DAN Zn PADA LIMBAH CAIR KELAPA SAWIT MENGGUNAKAN MEMBRAN SILIKA: ABSORPTION KINETIC OF Cu AND Zn METALS IN PALM LIQUID WASTE USING SILICA MEMBRANE Feni Sri Erani; Abu Hasan; Indah Purnamasari
KINETIKA Vol. 13 No. 03 (2022): KINETIKA 01112022
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Heavy metals can cause environmental pollution and affect human health. Cu and Zn are often found in the environment. One method to reduce Cu and Zn is to use the adsorption method. Adsorption has become a competitive method in the field of wastewater. Adsorption kinetics is one of the main factors that must be understood before the application of any adsorbent. In each adsorption process, linear or non-linear analysis of the kinetics was applied. A fit index (correlation coefficient or sum of squares) was applied to access the best model. The purpose of this study was to determine the adsorption equation model, to obtain the adsorption kinetics of Cu and Zn metals using a silica membrane. The methodology used is silica extraction by precipitation method and then the process of making PVA and PEG membranes as adhesives and solvents. For the analysis of metal concentrations of Cu and Zn, Atomic Absorption Spectrophotometry (AAS) was used, while for membrane morphology analysis, a Scanning Electron Microscope (SEM) was used. From the process of applying silica membrane to palm oil liquid waste, the results of Pseudo Order 1 absorption kinetics for Cu metal (artificial solution) with k value of artificial Cu metal (4M) 0.0596, and k value of artificial Cu metal (8M) 0.0022, while the Pseudo Order 1 absorption kinetics for Zn metal with a k value of Zn metal (4M) 0.0077, and a k value of Zn metal (8M) 0.0109.
Tetes Tebu Menjadi Katalis Untuk Proses Pembuatan Biodiesel Raysha Amelya; Indah Purnamasari; Muhammad Yerizam
Jurnal Serambi Engineering Vol 8, No 4 (2023): Oktober 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i4.6756

Abstract

Sugar cane is a plant that is processed into crystal sugar because it contains high sugar content. Sugar production produces waste, one of which is molasses waste. This study aims to obtain molasses into a catalyst using the carbonization method and the sulfonation method. The sulfonation method uses variations in the concentration of 2, 4, 6, 8, and 10 N H2SO4 solution and variations in sulfonation time of 2, 4, and 6 hours to get the best molasses catalyst. Catalyst characterization includes surface acidity by acid-base titration, FT-IR, and SEM-EDX. This research also aims to produce biodiesel yield using the best molasses catalyst. The results of surface acidity analysis showed that the best molasses catalyst was obtained at 10 N H2SO4 concentration with 6 hours at 0.907 mmol/gr. FT-IR test results showed the presence of O=S=O functional groups at wave numbers 1149.74 cm-1 and 1038.57 cm-1. SEM and EDX analysis results showed that the molasses catalyst after sulfonation had smaller pores and more sulfur groups on the carbon sheet. The yield of biodiesel produced using a molasses catalyst was 84.51%.
EVALUASI KINERJA ALAT CALCINER DITINJAU DARI EFESIENSI THERMAL DAN EMISI GAS CO2 DI PABRIK II PT SEMEN BATURAJA Tbk Rama Wijaya; Indah Purnamasari; Abraham Abimanyu Kristiyono Putro; Safaruddin
DE FACTO : Journal Of International Multidisciplinary Science Vol 1 No 02 (2023): DE FACTO : Journal Of International Multidisciplinary Sciences
Publisher : Pusat Studi Ekonomi, Publikasi Ilmiah dan Pengembangan SDM Azramedia Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62668/defacto.v1i02.476

Abstract

Calsiner merupakan alat bantu pemanasan yang digunakan semua produk rotary kiln modern, calsiner menggunakan batubara sebagai bahan bakar yang kontak dengan udara panas dari Kiln (udara tersier) yang berasal dari grate cooler. Calciner merupakan alat yang digunakan sebagai tempat terjadinya proses kalsinasi batu kapur dan pembakaran bahan bakar secara simultan di suatu pabrik semen. Penambahan calciner pada Pabrik Semen bertujuan untuk mengurangi burning zone load di kiln karena bahan bakar ke calsiner mencapai 60%, meningkatkan kapasitas produksi kiln, serta membuat pengoperasian kiln lebih stabil. Pada PT Semen Baturaja Tbk menggunakan preheater dengan 5 stage, dimana calciner ditempatkan setelah siklon IV, kemudian hasil calciner menuju siklon V lalu diumpankan ke rotary kiln. Mengingat besarnya peranan calciner dalam proses pembuatan semen di PT Semen Baturaja Tbk. maka perlu dilakukannya suatu evaluasi terhadap kinerja dari alat tersebut. Peranan efesiensi thermal dari calciner sangat penting karena menggambarkan kinerja dari calciner, baik atau tidaknya kinerja calciner dapat dilihat dari efesiensi thermal calciner. Efesiensi thermal dari alat calciner yang didapatkan berdasarkan perhitungan Neraca Massa dan Neraca Panas berkisar 75,59%-79,74% dengan efesiensi thermal aktual rata-rata sebesar 77,26% sementara itu untuk heat loss rata-rata sebesar 22,74%. Hasil perhitungan efesiensi menunjukkan bahwa kinerja alat calciner ditinjau dari efesiensi thermal unit calciner terbilang cukup efesien dan masih baik untuk digunakan, karena ditandai dengan efesiensi thermal unit calciner masih termasuk dalam rentang efesiensi thermal calciner secara desain. Dari jumlah rata-rata CO2 yang dihasilkan dari kalsinasi sebesar 100.033,7376 kg/jam dan pada pembakaran bahan bakar sebesar 43.201,24151 kg/jam, ini akan berdampak kurang baik terhadap kualitas udara di sekitarnya. Sehingga harus diminimalisir pada penggunaan batubara dan memaksimalkan efesiensi pada sistem kiln.
ISOLASI SELULOSA PADA TANDAN KOSONG KELAPA SAWIT SEBAGAI MATERIAL PENGISI BIODEGRADABLE STYROFOAM Aprilia Nanda Utami; Indah Purnamasari; Jaksen M. Amin
Jurnal Inovasi Teknik Kimia Vol 9, No 2 (2024)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v9i2.9277

Abstract

Kadar selulosa yang banyak dan lignin yang sedikit menjadikan tandan kosong kelapa sawit layak dan efisien untuk digunakan sebagai bahan baku pengolahan produk yang berbasiskan selulosa. Penelitian yang telah dilakukan bertujuan untuk menentukan pengaruh konsentrasi hidrogen peroksida dan suhu bleaching terhadap karakteristik selulosa yang dihasilkan dan pengaruh penambahan material pengisi berupa selulosa terhadap karakteristik biodegradable styrofoam. Proses isolasi selulosa dari tandan kosong kelapa sawit dilakukan dengan menggunakan metode hidrolisis alkali menggunakan natrium hidroksida dan dilanjutkan dengan proses bleaching menggunakan hidrogen peroksida dengan variasi konsentrasi hidrogen peroksida sebanyak 5 variasi, yaitu 10%, 20%, 30%, 40%, dan 50% serta suhu bleaching sebanyak 3 variasi, yaitu 60oC, 80oC, dan 100oC. Melalui proses isolasi selulosa dari tandan kosong kelapa sawit yang telah dilakukan, dapat disimpulkan bahwa konsentrasi hidrogen peroksida dan suhu bleaching berbanding lurus terhadap kadar selulosa dan berbanding terbalik terhadap kadar hemiselulosa dan lignin yang dihasilkan. Di mana selulosa terbaik diperoleh pada konsentrasi hidrogen peroksida 30% dan suhu bleaching 100oC karena mengandung kadar hemiselulosa terendah, yaitu 17,61%, kadar selulosa tertinggi, yaitu 62,05%, dan kadar lignin terendah, yaitu 10,02%. Selulosa yang digunakan sebagai material pengisi dapat menghasilkan biodegradable styrofoam dengan karakteristik berupa ketahanan air sebesar 11,25%, kemampuan degradasi sebesar 35,68%, dan densitas sebesar 1,11 gr/cm3
Crude Palm Oil Dikatalisis Enzim Lipase Amobil dengan Pengaruh Waktu Reaksi Menggunakan Packed Bed Reactor Revi Indira Shafika; Martha Aznury; Indah Purnamasari
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Biodiesel is an alternative fuel based on renewable energy sources. Generally, chemical processes such as transesterification and esterification are used to produce biodiesel. The biodiesel process using lipase enzyme as a catalyst has the advantage of specific activity and easy separation due to catalyst heterogeneity. Considering the high price of the enzyme, immobilization in the matrix is carried out using cationic resin. The purpose of this study was to determine the effect of reaction time on the activation of immobilized lipase enzyme catalyst on biodiesel produced using packed bed reactor and to obtain optimum biodiesel product characteristics with variations of reaction time on viscosity, density, %yield, iodine number, saponification number, cetane number, biodiesel acid number, total glycerol, methyl ester content and flash point. This research obtained the highest %yield of 86.35%, density of 878 Kg/m3, viscosity of 4.39 cSt, cetane number 68.65, saponification of 144.58 mg KOH/g, acid number 0.47 mg KOH/g, iodine number 68.53 g I2/100g, total glycerol 0.19%, methyl ester 97.31% and flash point 101°C. From the ratio of oil and methanol 1:10, which meets the quality requirements of SNI 7182:2015.
Co-Authors Abraham Abimanyu Kristiyono Putro Abu Hasan Abu Hasan Abu Hasan Amalia Adriatna Putri Anerasari Anerasari Anerasari Meidinariasty Anhar Anhar Aprilia Nanda Utami Azaria Hikmah Fajrianti Dwi Okta Larassakti Erwana Dewi Eti Nurmahdani Fadarina Fadarina Fadarina Fatria Fatria Feni Sri Erani Jaksen M. Amin Lety Trisnaliani Martha Aznury Martha Aznury Muhammad Yerizam Muhammad Zaman Rahmaniar Rahmaniar Rahmat Dwi Aprian Rama Wijaya Ratu Aqso Has Raysha Amelya Revi Indira Shafika Robert Junaidi Robert Junaidi Robert Junaidi Rusdianasari Rusdianasari Safaruddin Selastia Yuliati Syakdani, Adi Umi Nopitasari Yohandri Bow Zikri, Ahmad