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All Journal Jurnal Pangan dan Agroindustri Jurnal Sosiologi USK (Media Pemikiran & Aplikasi) Jurnal Optimalisasi Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi ADMA: Jurnal Pengabdian dan Pemberdayaan Masyarakat NUSANTARA: Jurnal Pengabdian Kepada Masyarakat Sejahtera: Jurnal Inspirasi Mengabdi Untuk Negeri Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education)
Yusi Hidjrawan
Jurusan Teknik Industri, Fakultas Teknik, Universitas Teuku Umar
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Education Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Nursing Social Sciences Other

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Journal : Jurnal Optimalisasi

 1 
OPTIMALISASI SARANA PENGANGKUTAN SAMPAH DI DESA BLANG KRUENG ACEH BESAR Irmayani, Irmayani; Syahril, Syahril; Hidjrawan, Yusi
Jurnal Optimalisasi Vol 5, No 1 (2019): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v5i1.1252

Abstract

Waste management aims to protect clean and healthy environment. Handling of waste problems in Blang Krueng area still has many obstacles. Most of the locations of waste disposal in Blang Krueng area do not meet health requirements. People do not yet have waste dumping. This is due to the unavailability of waste transportation facilities. In addition, in order to overcome this waste, people often burn the wastes. However, it can cause air pollution. Thus, this research is expected to optimize waste transportation facilities based on the number of ritations by using waste generation data in the area. The last hope of course the cleanliness  in Blang Krueng area.
ANALISIS POSTUR KERJA PADA STASIUN STERILIZER DENGAN MENGGUNAKAN METODE OWAS DAN REBA Yusi Hidjrawan; Aman Sobari
Jurnal Optimalisasi Vol 4, No 1 (2018): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v4i1.1315

Abstract

Work posture analysis needs to be done in order to reduce injuries, Musculoskeletal Disorders are one of the injuries that are often experienced by workers in carrying out Manual Material Handling (MMH) activities, namely injuries to muscles, nerves, tendons, bones, joints, cartilage caused by activities work. The purpose of this study was to measure work posture using the OWAS and REBA methods. These results will be used as a reference to provide recommendations for improving working posture at the Sterilizer station. The results of this study indicate that there is no significant difference in evaluating work posture in assessing work posture with the application of OWAS and REBA methods. Only the final score (grand score) is different, this is because the assessment of the assessment category scores on each work element is different based on the method used. Assessment of posture based on the OWAS and REBA methods provides the same conclusion that the level of risk of musculoskeletal disorders is at a high level. This proves that both relevant methods are used to assess at the sterilization station at PT. Karya Tanah Subur.
Pengukuran Beban Kerja Operator Boiler Berdasarkan Denyut Nadi Melalui Pendekatan Fisiologis di PT. Beurata Subur Persada Yusi Hidjrawan; Irwanda Irwanda; Marlinda Marlinda
Jurnal Optimalisasi Vol 8, No 1 (2022): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v8i1.5346

Abstract

PT. Beurata Subur Persada adalah perusahaan yang digunakan sebagai objek penelitian. Perusahaan ini bergerak di bidang produksi pengolahan kelapa sawit. Perusaahan ini memiliki beberapa stasiun salah satunya stasiun boiler dimana beroperasi dibagian yang menghasilkan steam. Steam diperoleh dengan memanaskan bejana yang berisi air dengan menggunakan bahan bakar. Proses pemasukan bahan bakar yang dilakukan oleh operator boiler cukup berpotensi timbulnya resiko kerja, proses pemasukan bahan bakar dilakukan menggunakan alat berupa sekrop yang jaraknya terlalu dekat dengan proses pembakaran sehingga dapat membahayakan operator dan timbulnya cidera yang diakibatkan hantaran paparan panas dan percikan api akibat hembusan angin. Penelitian ini bertujuan untuk menilai kategori beban kerja fisik operator pada proses assembly manual dengan pendekatan fisiologi dimana dilakukan pengukuran denyut nadi pemulihan. Penelitian dilakukan pada bagian boiler yang memiliki 4 operator. Dimana dilakukan pengukuran denyut nadi operator setelah dan sebelum beraktivitas. Hasil penelitian menunjukkan nilai beban kerja fisik Beban kerja fisik yang dialami oleh seluruh operator berdasarkan perhitungan konsumsi energi berada dalam kategori beban kerja sedang. Sehingga dapat disimpulkan persentase %CVL berada dalam kategori nadi pemulihan tidak normal, beban kerja berlebihan, perlu ada perbaikan.
IDENTIFIKASI SENYAWA TANIN PADA DAUN BELIMBING WULUH (Averrhoa bilimbi L.) Yusi Hidjrawan
Jurnal Optimalisasi Vol 4, No 2 (2018): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v4i2.1475

Abstract

This study aims to identify tannin compounds in the leaves of starfruit (Averrhoa bilimbi L.) and to find out the benefits of starfruit leaves. starfruit leaf extract obtained through starfruit leaves crushed first, then added a solution of methanol and then filtered using filter paper, then extracts of starfruit leaf extract divided into two test tubes, in which one tube is dripped with iron (III) chloride. The results showed that, the color of the wuluh starfruit leaf extract which was originally brownish yellow turned blackish blue. It can be concluded that the starfruit leaves of tannin compounds were identified. Tannin compounds function to bind and precipitate protein. So that in health tannins function to treat diarrhea, treat hemorrhoid, stop inflammation and also can be a natural alternative to cleaning artificial teeth.
Analisis Postur Kerja Operator Menggunakan Metode Rapid Entire Body Assesment (REBA) di Stasiun Pengisian Tawas PDAM Tirta Meulaboh Marlinda Marlinda; Yusi Hidjrawan; Endi Saputra; Risnadi Irawan
Jurnal Optimalisasi Vol 8, No 1 (2022): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v8i1.5332

Abstract

This study aimed to analyze the operator's work posture using the Rapid Entire Body Assessment (REBA) method and to determine the level of risk of Musculoskeletal Disorders (MsDs) on the alum filling station operator at PDAM Tirta Meulaboh. Based on the observations made on the operator's activities while working, the operator fills the alum with a bent body position, uses a shovel and lifts it and is done repeatedly. This research is a quantitative descriptive study, with direct observation of the process of filling alum. Data collection is done by taking photos of the operator's activities while doing his job, then determining the angle of the operator's body using the Rapid Entire Body Assessment (REBA) method. The conclusions is that the operator's working posture with REBA method gets a score for element I with a score of 6, element II with a score of 8, and element III with a score of 7 and the level of risk through Action Level. REBA score element I final score (4-7) moderate risk category with required action, element II final score (8-10) high risk category with urgent action required, and element III final score (4-7) moderate risk category with required action.
Pengendalian Oil Losses pada Titik Losses Crude Palm Oil dengan Metode Statistical Process Control di PT. Ujong Neubok Dalam Rita Hartati; Marlinda Marlinda; Yusi Hidjrawan; Rahmi Puspita
Jurnal Optimalisasi Vol 8, No 2 (2022): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v8i2.6220

Abstract

Perusahaan selalu mengutamakan kualitas dan mengoptimalkan jumlah rendemen Crude Palm Oil (CPO), salah satu sistem manajemen yang diterapkan untuk mendapatkan jumlah rendemen optimal adalah menekan terjadinya kehilangan minyak (Oil losses) pada saat proses produksi. Tujuan dari penelitian ini yaitu untuk mengetahui tingkat dan penyebab terjadinya Oil losses pada titik losses di PT. Ujong Neubok Dalam menggunakan metode Statistical Process Control (SPC).Kehilangan minyak (Oil losses) PKS PT Ujong Neubok Dalam biasanya terjadi pada 4 (empat) titik/stasiun yang berperan penting dalam proses pengolahan CPO yaitu: pada stasiun thresher minyak yang terikut janjangan kosong (empty bunch), stasiun press minyak yang terikut pada ampas press (fibre press), stasiun clarification minyak yang ada di pembuangan sludge centrifuge, dan finnal effluen (sisa pembuangan pabrik/limbah). Dari titik lokasi terjadinya Oil losses tersebut, perusahaan memberikan standar atau batasan maksimal kehilangan (Oil losses), fibre press (3,5%), empty bunch (2,5%), sludge centrifuge (1%), dan finnal effluen (0,8%).
Optimalisasi Penjernihan Air PDAM Tirta Meulaboh Menggunakan Aluminium Sulfat (Tawas) dan Poly Aluminium Chloride (PAC) Marlinda Marlinda; Rita Hartati; Yusi Hidjrawan; Kasmawati Kasmawati
Jurnal Optimalisasi Vol 9, No 1 (2023): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v9i1.6386

Abstract

This research aimed to determine the optimum coagulant that can be used to purify PDAM Tirta Meulaboh water which often has a cloudy color during the rainy season. The coagulants used are PAC and Tawas with the chemical formula Al2(SO4)3 and Poly Aluminum Chloride is known as PAC with the chemical formula Aln(OH)mCl(3n-m). The test was carried out by mixing 10 grams of alum and PAC which were dissolved in 1000 mL of water/aquades each. The treatment was carried out by dissolving each 1 mL in 1000 mL of PDAM water sample equal to 10 ppm. Variations in the addition of PAC/alum to each container were 10, 20, 30, 40, 50 and 60 ppm. Furthermore, rapid mixing was carried out at a speed of 100-150 rpm and slow at 20 rpm. The results showed that 10 ppm of PAC added to the sample produced turbidity of 5.2 NTU and pH 7.8, 20 ppm: 4.1 NTU and pH 7.5, 30 ppm: 3.8 NTU pH 7.3, 40 ppm : 2.3 NTU pH 7.2, 50 ppm: 1.5 NTU pH 7.1, 60 ppm: 0.8 NTU and pH 7.0. Samples added with 10 ppm of alum produced turbidity of 5.5 and pH 6.8, 20 ppm: 5.1 pH 6.7, 30 ppm: 4.5 pH 6.6, 40 ppm: 3.2 pH 6.6 , 50 ppm: 4.3 pH 6.4 and 60 ppm: 5.0 pH 6.3. The conclusions from this study indicate that PAC and alum coagulants can affect turbidity and pH levels of water, the optimal addition of PAC coagulant to purify water is 20 ppm, while the optimal addition of alum coagulant to purify water is 30 ppm.
Identifikasi Potensi Bahaya pada Stasiun Boiler Menggunakan Metode Hirarc di PT. Syaukath Agro Hidjrawan, Yusi; Hartati, Rita; Marlinda, Marlinda; Ariansyah, Wanda
Jurnal Optimalisasi Vol 10, No 1 (2024): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v10i01.9292

Abstract

PT Syaukath Agro is a company operating in the Agribusiness Sector which is engaged in processing palm oil Fresh Fruit Bunches (FFB) into crude palm oil (CPO), Palm Kernel (PK) and shells. The palm oil processing system consists of several stages starting from receiving Fresh Fruit Bunches (FFB) to becoming palm oil or Crude Palm Oil (CPO). The palm oil processing process can be used in several stages carried out at each station. Based on interviews conducted, each station has a different level of risk of accidents, one of the stations that has a large risk of work accidents is the boiler station which is the heart of a palm oil factory where the steam boiler is the source of power and the source of the steam that will used to process palm oil. Boilers have potential dangers or risks when operated. The risks that often occur are falls, slips, burns, scalds, heat, noise, so it is very important to supervise and provide guidance regarding work safety. The size of the accident caused will certainly have a detrimental impact on the company. The severity of the accident can be determined through identification of potential dangers and risk assessment of all boiler operating activities at PT. Syaukath Agro. Based on the results of research conducted using the hirarc method, potential hazards found in boiler stations include: Unergonomic Working Attitudes, Noise Levels >84 dB with 8 Hours/Day Exposure, Working climate temperature (hot) 31°C on exposure >8 working hours/day, and oil buildup. Types of risk of work accidents at boiler stations consist of: Falls, injuries (slipping, slippery floors) Burns (in contact with hot objects around), Heat exhausting (Heat), Work accidents (fatigue ), hearing loss (noise), blisters (burns), health problems (muscles, bones), contact dermatitis (exposed to dangerous toxic radiation). Based on the results of risk control, it was found that the most appropriate type of control recommendation is administrative control and compliance with the use of personal protective equipment (PPE). Administration (Administration Control) is carried out by creating or providing a work system that can reduce the possibility of someone being exposed to potential dangers. The hierarchy of control of Personal Protective Equipment (PPE) is used to provide a boundary between exposure to the body and the potential danger received by the body.
Co-Authors A.A. Ketut Agung Cahyawan W AA Sudharmawan, AA Abdiel Khaleil Akmal Ali, Sulaiman Aman Sobari Ariansyah, Wanda Endah Anisa Rahma, Endah Anisa Endi Saputra Hartati, Rita Ibnu Khaldun Irawan, Risnadi Irmayani Irmayani Irwanda Irwanda Kasmawati Kasmawati Kasmawati Kasmawati Mahmud Basuki Marlinda Marlinda Marlinda Marlinda Marlinda Marlinda Muzakkir Muzakkir Nissa Prasanti Rahma, Cukri Rahmi Puspita Rita Hartati Rita Hartati Samwil, Samwil Sofiyanurriyanti Sri Adelila Sari Syahril Syahril