Article Per Year (5 Year)
p-Index From 2020 - 2025
0.659
P-Index
This Author published in this journals
All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan METANA Journal of Research and Technology International Conference on Industrial Revolution for Polytechnic Education
Denny Dermawan
Program Studi Teknik Pengolahan Limbah, Jurusan Teknik Permesinan Kapal, Politeknik Perkapalan Negeri Surabaya
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Mathematics

Published : 10 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 10 Documents
Search

 1 
ANALISIS POTENSI DAN DAMPAK KEBOCORAN GAS HIDROGEN PADA HYDROGEN PLANT DI INDUSTRI PELUMAS Setiawan, Adhi; Hanifah, Dian Nur; Nugroho, Agung; Dermawan, Denny
Journal of Research and Technology Vol 3, No 2 (2017)
Publisher : Universitas Nahdlatul Ulama Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (402.575 KB) | DOI: 10.5281/zenodo.2581773

Abstract

Increasing the need for pure hydrogen in the industry is growing. One of its roles is in purification of petroleum industry. High purity hydrogen (99.99%) was obtained from methane using the steam methane reforming method in the hydrogen plant unit. Hydrogen is a very dangerous chemical element with its flammable properties. This research is conducted especially on purification system. Quantitative analysis is used to determine the frequency of hydrogen leakage, consequence modeling, and risk estimation that will be generated. The results of the analysis show that the highest frequency occurs in unignited release events. The jet fire scenario produces the longest fire length in the HPU about 27 meters. The jet fire scenario impact produces the farthest secure distance in the case of a leak in the HPU section of 60 meters. The flash fire produces the farthest distance loss in a leakage case in the HPU of 80 meters, and explosion at a radius of 200 meters will have a blast overpressure 7.62 psig with 22% fatality estimation of the population.
PENGARUH KEBISINGAN DAN IKLIM KERJA TERHADAP STRES KERJA DI PABRIK PRODUKSI MAKANAN HEWAN Wiediartini, Wiediartini; Dermawan, Denny
Journal of Research and Technology Vol 5, No 1 (2019)
Publisher : Universitas Nahdlatul Ulama Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (354.65 KB)

Abstract

Noise and heat has become a problem for worker in animal food processing company.  The aim of this study was to investigate the influence of noise and heat to stres. Noise and heat data were collected as primary data and stres was collected by questionnaire and analyzed by multiple regression. The result showed relationship between noise, heat and stres (sig 0,003<0.05). A moderate correlation between noise, heat and stres was also observed (r=0,561). No differences between two groups of age, gender and status were found with t test. Reducing noise and heat by engineering and administrative control were necessary execute. There is no need for different treatment to reduce stres between group of gender, age and status.
EVALUASI EMERGENCY RESPONS PLAN PADA KAPAL 42M CREW BOAT BERDASARKAN IMO INTERIM GUIDILINES Ashari, Mochamad Luqman; Wiediartini, Wiediartini; Dermawan, Denny
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 10, No 3 (2013): Oktober
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (417.739 KB) | DOI: 10.14710/kpl.v10i3.5600

Abstract

Emergency situations that have tendency or potential harm can be happened any time and any where and carry some big damaging impacts to property damages, mental disturbances, injured and died victims. In shipping, emergencies can be happened in both at anchor or while doing loading and unloading activities at the port. The type of equipments used in emergency situations set out in SOLAS Chapter III (Life Saving Appliance) and the guidelines for evacuation analysis on passenger ships refer to the IMO Guidelines Interm MSC/Circ.909. This study aimed to determine the muster station and evacuation time on the ship 42 M crewboats with a capacity of 101passengers. This ship consists of three parts of decks, these are lower part, main deck and bridge deck. The results showed that the placement of muster station is on the bridge deck with required wide 35.35 m2. Evacuation time need by the all passengers to reach the muster station on the bridge deck is 51.59 minutes, and this is in accordance with standard evacuation time (not more than 60 minutes).
Studi Komparasi Kelayakan Teknis dan Lingkungan Pemanfaatan Limbah B3 Sandblasting terhadap Limbah B3 Sandblasting dan Fly Ash sebagai Campuran Beton Dermawan, Denny; Ashari, Mochammad Luqman
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 15, No 1 (2018): Maret 2018
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (824.43 KB) | DOI: 10.14710/presipitasi.v15i1.25-30

Abstract

Fly ash and sandblasting slag widely used as concrete’s builder because it contains quite high silica (SiO2) approximately 58,20% and 98,97%. Fly ash and sandblasting slag can increase concrete power pressure and contains characteristic like cement. Method of concrete making and technical feasibility test on this research use SNI standar (SNI 03-2834-2000). Environmental feasibility test use Toxicity Characteristic Leaching Procedur (TCLP) according PP No. 101 tahun 2014. The results of this research show that the use of  sandblasting slag can increase concrete power pressure at age of immersion 28 days. Concrete power pressure with 5%; 10%; 15%; and 20% sandblasting slag are 16,32 MPa; 17,81 MPa; 18,89 MPa; and 15,24 MPa. The use of sandblasting slag and fly ash can increase concrete power pressure at age of immersion 28 days. Concrete power pressure with 5% sandblasting slag and 30% fly ash; 10% sandblasting and 25% fly ash, 15% sandblasting and 20% fly ash, and  20% sandblasting and 15% fly ash are 18,53 Mpa, 16,08 MPa, 17,20 Mpa, and 15,91 MPa.  Based on the TCLP test, the concentration of heavy metal substances in 10% SBE are below the standard. Thus, it is  scientifically proven to conclude that concrete with 10% and 15% sandblasting slag and 5% sandblasting slag and 30% fly ash; 15% sandblasting and 20% fly ash are technically proper and safe for the environment.
Studi Pemanfaatan Limbah Padat Industri Pengolahan Minyak Kelapa Sawit Spent Bleaching Earth sebagai Pengganti Agregat pada Campuran Beton Dermawan, Denny; Ashari, Mochammad Luqman
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 15, No 1 (2018): Maret 2018
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (802.236 KB) | DOI: 10.14710/presipitasi.v15i1.7-10

Abstract

Palm oil refinery factory has solid waste by product  called Spent Bleaching Earth (SBE). SBE consists of some chemical compounds and one of them  is SiO2 up to 83,05%. SiO2 or silica fume can cause silicosis if it is exposed to the atmosphere and frequently inhaled by the workers.  On the other hand,  SiO2  is one of the material  composition of Portland cement. Thus, it is necessary to conduct a research about the utilization of SBE. as a concrete mixture. SBE is utilized as fine aggregate substitution by the composition of 0%, 10%, 20%, 30%, and 40% of the total amount of fine aggregate. The conducted tests are fineness modulus calculation, compressive strength, setting time, and TCLP. The method used for mix  design is SNI 03-2834-2000 with f’c 28,5 MPa and slump 12 ± 2 cm. This research  shows  that concretes with SBE substitution which achieve the planned compressive strength are 10% SBE with 34,16 MPa and 20% SBE with 29,06 MPa. Based on the TCLP test, the concentration of heavy metal substances in 10% SBE are below the standard. Thus, it is  scientifically proven to conclude that concrete with 10% SBE is technically proper and safe for the environment.
Biosorpsi Logam Berat Cu(II) Menggunakan Limbah Saccharomyces Cereviseae Setiawan, Adhi; Basyiruddin, Fariz; Dermawan, Denny
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 16, No 1 (2019): Maret 2019
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (765.095 KB) | DOI: 10.14710/presipitasi.v16i1.29-35

Abstract

Biosorpsi merupakan salah satu jenis bentuk pengolahan limbah logam berat dengan menggunakan mikroorganisme, seperti bakteri, alga dan ragi (yeast). Penelitian ini  menggunakan ragi (yeast) dari industri bir. Proses preparasi biosorben meliputi pengendapkan, pengeringan, dan pengayakan untuk memperoleh ukuran homogen. Biosorben yang terbentuk kemudian dikontakkan dengan larutan Cu (II) dengan konsentrasi 25 mg/L dan diteliti pengaruh pH (3, 4, 5), waktu kontak (1, 2, 3 jam) dan berat biosorben (0,25, 0,5, 0,75 gr) terhadap kemampuan biosorben dalam menurunkan konsentrasi logam Cu. Selanjutnya pada persen removal tertinggi dilakukan regenerasi menggunakan HNO3. Konsentrasi Cu yang setelah biosorpsi diuji menggunakan spektrofotometer Uv-Vis. Hasil penelitian menunjukkan bahwa pada pH 5, waktu kontak 1 jam dan berat biosorben 0,75 gr memiliki persen removal yang tertinggi yaitu sebesar 55,36%. Biosorben yang telah diregenerasi mengalami penurunan persen removal logam Cu (II) dari 55,36% menjadi 48,2%.
PENGARUH KEBISINGAN DAN IKLIM KERJA TERHADAP STRES KERJA DI PABRIK PRODUKSI MAKANAN HEWAN Wiediartini; Denny Dermawan
Journal of Research and Technology Vol. 5 No. 1 (2019): JRT Volume 5 No 1 Jun 2019
Publisher : 2477 - 6165

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

Abstract

Noise and heat have become a problem for a worker in the animal food processing company. The aim of this study was to analyze the influence of noise and heat to stress. The result showed a relationship between noise, heat, and stress (sig 0,003<0,05). A moderate correlation between noise, heat, and stress was also observed (r=0,561). No differences between the two groups of age, gender, and status were found with t-test. Reducing noise and heat were necessary to be executed through engineering and administrative control. There was no need to differ the treatment to control the stress between a group of gender, age, and status.
Blended Learning in TVET: Bridging Adult Learning Wiediartini,Denny Dermawan
International Conference on Industrial Revolution for Polytechnic Education Vol. 2 No. 2 (2020): International Conference on Industrial Revolution for Polytechnic Education
Publisher : PolinemaPress

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

Abstract

The Fourth Industrial Revolution is a challenge for TVET and should become an integral part of the TVET Strategy. There should be shifting learning environment in TVET to anticipate the trend of the changing of the technology and the essential of adult learner. Technology mediated interactions between students, instructor, and learning resources are needed to accommodate unique characteristics of adult learner. Blended Learning courses combine e-learning and face-to-face learning activities to improve student-learning outcomes and to address important institutional issues. The purpose of this paper is to discuss the strategy of implementation of blended learning. Blended learning in meaningful ways if there is a clear and supportive institutional strategy. This article categories three strategy to implement blended learning, from the instructor, student and organization view.
Efektifitas Penyisihan Fosfat Pada Air Limbah Menggunakan Metode Kombinasi Elektrokoagulasi dan Fotokatalis Dengan Kaolin-TiO2 Adhi Setiawan; Lintang Indra Liuqil Mahfudz; Tarikh Azis Ramadani; Siti Muthi’ah; Muhammad Asrul Nizam; Denny Dermawan
METANA Vol 18, No 2 (2022): Desember 2022
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/metana.v18i2.49639

Abstract

Kandungan fosfat pada badan air salah satunya bersumber dari air limbah domestik dan industri. Fosfat yang berlebihan dapat menyebabkan eutrofikasi. Alternatif pengolahan fosfat pada air limbah salah satunya menggunakan kombinasi metode elektrokoagulasi dan fotokatalis. Penelitian ini bertujuan untuk mengetahui pengaruh waktu kontak dan besar tegangan pada metode elektrokoagulasi, pengaruh dosis katalis dan waktu penyinaran pada metode fotokatalis, dan karakteristik katalis komposit kaolin-TiO2. Penyisihan fosfat dilakukan secara batch menggunakan elektrokoagulasi yang dilanjutkan dengan proses fotokatalis. Metode elektrokoagulasi menggunakan elektroda aluminium dengan variasi tegangan 10, 20, dan 30 V, serta waktu kontak 90 dan 120 menit. Metode fotokatalis menggunakan komposit kaolin-TiO2 dan sumber foton lampu UV-C, dengan variasi dosis kaolin-TiO2 yaitu 120, 180, dan 240 mg/L, serta waktu penyinaran 10, 20 dan 30 menit. Komposit kaolin-TiO2 dikarakterisasi menggunakan XRD, FTIR, dan SEM-EDX. Hasil penelitian menunjukkan efisiensi penyisihan fosfat pada elektrokoagulasi maksimal diperoleh pada kondisi tegangan 30 V dan waktu kontak 120 menit dengan nilai sebesar 87,31%. Nilai maksimum penyisihan parameter fosfat fotokatalis terjadi pada dosis katalis 240 mg/L dengan waktu reaksi 30 menit dengan nilai sebesar 63,33%.  One of the phosphate contents in water bodies is sourced from household and industrial wastewater. Excessive phosphates can cause eutrophication. One alternative of phosphate treatment in wastewater is the combination of electrocoagulation and photocatalytic methods. This study aims to determine the influence of contact time and voltage magnitude on the electrocoagulation method, the effect of catalyst dosing and irradiation time on the photocatalyst method, and the characteristics of kaolin-TiO2 composite catalysts. The electrocoagulation method uses aluminum electrodes with voltage variations of 10, 20, and 30 V, as well as contact times variations of 90 and 120 minutes. The photocatalyst method uses kaolin-TiO2 composite and UV-C lamp photon sources, with dose of kaolin-TiO2 variations of 120, 180, and 240 mg/L, as well as irradiation times variations of 10, 20 and 30 minutes. The kaolin-TiO2 composite is characterized by XRD, FTIR, and SEM-EDX. The results showed that the maximum efficiency of phosphate removal in electrocoagulation was obtained at a voltage of 30 V and a contact time of 120 minutes with a value of 87.31%. The maximum value of photocatalyst phosphate removal occurred at a catalyst dose of 240 mg/L with a reaction time of 30 minutes with a value of 63.33%. 
Efektivitas Biosorpsi Logam Berat Ni(II) Menggunakan Saccharomyces cerevisiae Terimobilisasi Pada Natrium Alginat Setiawan, Adhi; Rahmawati, Devi Ayu; Novitrie, Nora Amelia; Dermawan, Denny
METANA Vol 20, No 2 (2024): Desember 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/metana.v20i2.59250

Abstract

Kandungan logam berat Nikel(II) yang dihasilkan dari aktifitas industri berpotensi menyebabkan pencemaran sumber daya air yang berbahaya bagi makluk hidup dan lingkungan. Penggunaan biomassa Saccharomyces cerevisiae terimobilisasi natrium alginat sebagai adsorben merupakan alternatif pengolahan yang murah dan efektif dalam menurunkan kandungan logam berat NI(II) di dalam air limbah. Imobilisasi dilakukan untuk meningkatkan stabilitas partikel biomassa dan meningkatkan kinerja proses penyerapan logam berat. Penelitian ini bertujuan untuk menganalisis karakteristik biosorben serta pengaruh pH, waktu kontak dan konsentrasi awal terhadap efisiensi penyisihan logam Ni(II). Proses adsorpsi dilakukan dengan sistem batch menggunakan variasi pH (3, 5, 6), waktu kontak (15, 30, 45, 60, 75, 90 menit), dan konsentrasi awal Ni(II) (25, 50, 75, 100 mg/L). Biosorben dikarakterisasi menggunakan FTIR dan SEM-EDX. Hasil penelitian menunjukkan hasil efisiensi penyisihan Ni(II) optimum diperoleh pada kondisi pH larutan 6, waktu kontak 75 menit, dan konsentrasi awal Ni(II) 100 mg/L yaitu sebesar 82,77%.  The heavy metal content Ni(II) produced from industrial activities has the potential to cause water resources to be polluted, which is dangerous for living creatures and the environment. Saccharomyces cerevisiae biomass immobilized with sodium alginate as an adsorbent is a cheap and effective treatment alternative in reducing wastewater's heavy metal NI(II) content. Immobilization is carried out to increase the stability of biomass particles and improve the performance of the heavy metal absorption process. This study aims to analyze the characteristics of biosorbents as well as the effect of pH, contact time, and initial concentration on the removal efficiency of Ni(II) metal. The adsorption process was carried out with a batch system using variations of pH (3, 5, 6), contact time (15, 30, 45, 60, 75, 90 minutes), and initial concentration of Ni(II) (25, 50, 75, 100 mg/L). The biosorbent was characterized using FTIR and SEM-EDX. The results showed that the optimum removal efficiency of Ni(II) was obtained in the condition of solution pH 6, contact time 75 minutes, and initial concentration of Ni(II) 100 mg/L, which amounted to 82.77%.
Co-Authors Adhi Setiawan Agung Nugroho Basyiruddin, Fariz Dian Nur Hanifah Hanifah, Dian Nur Lintang Indra Liuqil Mahfudz Mochamad Luqman Ashari Mochammad Luqman Ashari, Mochammad Luqman Muhammad Asrul Nizam Novitrie, Nora Amelia Nugroho, Agung Rahmawati, Devi Ayu Siti Muthi’ah Tarikh Azis Ramadani Wiediartini Wiediartini