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All Journal Sinergi Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Journal of Green Science and Technology Jurnal Rekayasa, Teknologi, dan Sains Jurnal Energi Baru dan Terbarukan CHEMTAG Journal of Chemical Engineering
Prastyo, Elli
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

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ANALYSIS OF THE EFFECT AMOUNT OF PLATE, DIAMETER PORT, AND WIDTH OF COMPRESSION ON INTERCOOLER PERFORMANCE IN PT INDONESIA POWER Prastyo, Elli
Journal of Green Science and Technology Vol 4, No 2 (2020): Journal of Green Science and Technology, Vol.4 No.2 (2020)
Publisher : FAKULTAS TEKNNIK UNIVERSITAS SWADAYA GUNUNG JATI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v4i2.3450

Abstract

This analysis to determine the performance of the intercooler based on actual data, and the intercooler's performance against design specifications changes using the NTU method. Variable design specifications in the study are the number of plates, compressed area, and port diameter values from intercooler specifications provided by the company. The results of the inter-device performance analysis of compatibility with the specifications required by the company amounted to 99.40%. The results of the first trial of the tool specifications point the compatibility value to increase to 99.98% by increasing the number of plates from 79 to 150 plates, reducing the compressed area value from 0.47 to 0.2 m and increasing the port diameter value from 0.2 to 0,5 m. The results of the trial 2 tool specification showed a decrease to 86.51% due to changes in variable variables, by the number of plates to 25, raising the compressed plate width to 0.5 meters and increasing the port diameter to 0.6 m. The highest overall heat transfer value on May 23-24 is 346.225,37  based on actual data calculation of Intercooler effectiveness. The lowest overall heat transfer value is 346.213,29  based on data calculation it occurred on 22 May 2019.
Peningkatan Kecepatan Start up dan Kemurnian Metana Dalam Pengolahan Limbah Organik Cair Menggunakan Rraktor Fixed Terimobilisasi Karbon Aktif Prastyo, Elli; Asminah, Ninin; Mulyani, Yully
Jurnal Energi Baru dan Terbarukan Vol 5, No 2 (2024): Juli 2024
Publisher : Program Studi Magister Energi, Sekolah Pascasarjana, Universitas Diponegoro, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jebt.2024.23090

Abstract

Biofuel generasi kedua masih menjadi pilihan dalam mengembangkan energi baru terbarukan dan mampu mengatasi permasalahan lingkungan dari kegiatan industri. Biofuel yang diproduksi oleh reactor anaerobic termodifikasi media immobilisasi mampu menghasilkan biogas dengan tingkat produksi dan kemurnian metana yang tinggi. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penggunaan media immobilisasi berupa karbon aktif dalam menghasilkan biogas dari limbah cair industry tahu. Variabel tetap dalam penelitian ini adalah penggunaan media immobilisasi karbon aktif 20 gr, 30 gr, dan 50 gr. Analisis berupa COD, VFA, volume biogas, dan kandungan metana diujikan untuk mengetahui kualitas dan kuantitas dari produk yang dihasilkan. Penelitian menggunakan reactor fixed dengan volume kerja 2 liter dengan perbandingan inoculum dan feed adalah 1:1. Hasil penelitian menunjukkan bahwa penguraian COD tertinggi sebesar 65,40% dengan penggunaan media immobilisasi 20 gr. Penggunaan karbon aktif 20 gr menghasilkan biogas tertinggi dengan puncak di hari ke-5 sebesar 65,449 mL dengan kemurnian metana sebesar 55,18% dengan waktu start up 10 hari. Kemurnian metana tertinggi dihasilkan oleh penggunaan media immobilisasi karobn aktif 50 gr sebesar 63,04% dengan laju produksi gas tertinggi terjadi hari ke-5 sebesar 36,1017 mL dengan waktu start up 8 hari
Evaluation of double-stage Anaerobic Fluidized Bed Reactor (AFBR) for digestion of leachate: correlation of kinetic parameter with operational condition and process Prastyo, Elli; Budhijanto, Wiratni; Sudibyo, Hanifrahmawan
SINERGI Vol 29, No 2 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2025.2.013

Abstract

The objective of this study is to investigate the performance of using an advanced fluidized bed reactor (AFBR) of a double column configuration in breaking down leachate into biogas. The relationship of the kinetic parameters with the operating conditions and the performance of the double-column reactor during anaerobic digestion was examined. The substrate concentration, microorganism population, hydraulic retention time value, growth rate, and death rate of microorganisms were employed as reference points for evaluating anaerobic digestion performance and assessing the operating conditions. The results demonstrated that there was no notable correlation between the formation of volatile fatty acids (VFA) in the acidogenic reactor (R1), the degradation of VFA in the methanogen reactor (R2), and the methane production rate in the methanogen reactor (R2). The simulation results for VFA formation (dCVFA1/dt) and VFA degradation (dcVFA2/dt) exhibited a tendency to overestimate when operated at low HRT and underestimate at short HRT compared to the experimental results. The steady state of the simulation results exhibited a faster rate of progression than the experimental outcomes. The fitting data for Ksx1 and Ksx2 predominantly comprise dynamically evolving values that exert an influence upon um1 and um1, as well as kd1 and kd2, when the reactor is operated in continuous mode. Furthermore, the factors of inhibitor compounds and microorganism adaptation were not observed across all HRT values in this investigation. 
Analysis of the Use of Modified Coal Bottom Ash as a Media for Immobilization of Microorganisms for the Production of Biogas from Macroalgae Prastyo, Elli; Ibrahim, Puji Astuti; Solikha, Dian Farkhatus
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 8, No 2 (2023): EDISI SEPTEMBER 2023
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v8i2.4742

Abstract

Biofuel from macroalgae is referred to as the third generation biofuel because it does not require fertile land in the production process. Therefore, it is not included in the debate on the food sector. One of the process engineering in biogas production is the addition of immobilization media in anaerobic reactors. Coal combustion produces bottom ash solid waste containing 39.70% carbon (C) and 46.99% silica dioxide (SiO2) as well as other trace metals that have the potential to be used as absorbent materials or immobilization media in anaerobic decomposition. The purpose of this study was to determine the effect of the use of coal bottom ash-based immobilization media in the production of macroalgae biogas Spadina sp. The fixed variable in this study was the use of immobilization media of 30 grams, 40 grams, and 50 grams. Test parameters in the form of sCOD, VFA, biogas volume, and methane levels were used in this study. The production of macroalgae biogas Spadina sp is carried out in a fixed bed reactor with a capacity of 2000 mL with semi-batch conditions. The results showed that the highest biogas production was 204.8 mL/day with the use of immobilization media of 40 grams. The lowest biogas production is 20.5 mL/day with the use of 50 grams of immobilization media. The use of 50 grams of immobilization media is the best media to produce biogas with a high level of purity with an average of 57.48% followed by the use of 40 grams of immobilization media with an average of 41.35%, and the use of 30 grams of immobilization media with an average of 21.96%.
PENGARUH SALT REJECTION, ELECTRIC CONDUCTIVITY TERHADAP KINERJA MEMBRANE REVERSE OSMOSIS Prastyo, Elli
CHEMTAG Journal of Chemical Engineering Vol 4, No 1 (2023): CHEMTAG Journal of Chemical Engineering
Publisher : Universitas 17 Agustus 1945 (UNTAG) Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/cjce.v4i1.3859

Abstract

Air proses memiliki peran penting dalam dunia industri petrokimia sebagai pembangkit steam dan proses pendinginan. Air proses dihasilkan dari unit utilitas sea water reverse osmosis pada unit water treatment plant. Air proses yang digunakan harus memiliki nilai TDS yang rendah. Kandungan TDS yang tinggi dapat menyebabkan terjadinya Fouling dalam pembangkit steam dan proses pendinginan. Sea water reverse osmosis air laut di proses melalui Membrane Reverse osmosis berfungsi mengurangi nilai Total Disolved Solid yang terkandung dalam air laut. Kinerja Sea Water Reverse Osmosis dapat dilihat dari nilai Fluks, Koefisien Permeabilitas terhadap nilai TDS dan Salt Rejection. Metodologi yang digunakan yaitu analisa deskriptif kuantitatif dan kualitatif. Nilai fluks TDS dan Salt Rejection dapat dihitung menggunakan data Logsheet SWRO. Nilai fluks suatu Membrane mempengaruhi kinerja SWRO. Fluks berbanding lurus terhadap TDS dan Berbanding terbalik dengan Salt Rejection. Koefisien permeabilitas berbanding lurus dengan TDS dan berbanding Terbalik dengan Salt Rejection. Hasil Fluks terbesar yaitu 12,623 L/m2H koefisien Permeabilitas Sebesar 4508 L/m2.H.atm dengan nilai TDS 420,88 mg/L dan salt rejection sebesar 97,844 %. Fluks berbanding lurus dengan koefisien permeabilitas.
KONSERVASI KEANEKARAGAMAN HAYATI FLORA DAN FAUNA PADA SITE PLANT PT POLYTAMA PROPINDO Prastyo, Elli; Ibrahim, Puji Astuti; Armis, Hana Rizkia
Jurnal Rekayasa Teknologi dan sains Vol 3, No 2 (2019): Jurnal Rekayasa, Teknologi, dan Sains
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v3i2.1909

Abstract

Kebutuhan lahan yang semakin meningkat karena perkembangan industrialisasi telah menyebabkan perusakan habitat, fragmentasi, dan penggantian spesies asli yang sensitif dengan spesies yang tidak asli. Konservasi keanekaragaman hayati menjadi perhatian khususnya pada negara berkembang dimana pertumbuhan penduduk dan industrialisasi semakin meningkat. Pengembangan konservasi merupakan proses untuk menciptakan perencanaan dan pelaksanaan awal sebagai dasar perlindungan ekologi. Partisipasi aktif dari pemangku kepentingan dan masyarakat lokal merupakan strategi penentu keberhasilan keanekaragaman hayati. Oleh karena penting mengkaji tanggung jawab perusahaan dalam usaha perlindungan dan konservasi keanekaragaman hayati. Penelitian ini bertujuan untuk mengetahui peran PT. Polytama Propindo dalam melaksanakan program konservasi keanekaragaman hayati. Pengambilan data keanekaragaman hayati diperoleh dari site plant PT. Polytama Propindo. Hasil penelitian menunjukkan PT. Polytama Propindo telah memanfaatkan lahan di area site plant untuk konservasi kehati dari tahun 2015 sampai 2019. Indeks biota air, flora, dan fauna mengalami trend peningkatan dari tahun 2015 sampai 2019. Nilai dan prinsip dasar dari konservasi keanekaragaman hayati oleh PT. Polytama Propindo pada site plant berdasarkan pada keselarasan dan pelestarian flora dan fauna endemic khas Kabupaten Indramayu. Kata kunci: PT. Polytama Propindo, Keanekaragaman, hayati, konservasi, indeks, flora, fauna
Co-Authors ', Armis Asminah, Ninin Dian Farkhatus Solikha, Dian Farkhatus Ibrahim, Puji Astuti Mulyani, Yully Sudibyo, Hanifrahmawan Wiratni Budhijanto