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All Journal Jurnal Serambi Engineering Jurnal Optimalisasi
Marlinda Marlinda
Program Studi Teknik Industri, Fakultas Teknik, Universitas Teuku Umar
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Engineering Environmental Science Industrial & Manufacturing Engineering

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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.
Pengukuran Tingkat Kebisingan Laboratorium pada Perusahaan Daerah Air Minum (PDAM) Tirta Daroy Kota Banda Aceh Rita Hartati; Marlinda Marlinda; Prasasti Abdillah
Jurnal Optimalisasi Vol 7, No 1 (2021): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v7i1.2586

Abstract

Noise is a sound or voice, based on the Decree of the Minister of Manpower and Transmigration of the Republic of Indonesia No. Per.13 / MEN / X / 2011, regarding the average maximum limit in the working area, the average limit of normal hearing in working conditions for 5 hours, a maximum of 87 dB and the standard for laboratory rooms according to the Decree of the Minister of State and Environment No.48 1996 Regarding the Standard Noise Level is 55 dB. PDAM (Regional Drinking Water Company) Tirta Daroy Banda Aceh City is a company that provides clean water for the people of Banda Aceh. PDAM Tirta Daroy has a laboratory that functions as a water quality inspection site. Measurement using a simple method in accordance with the regulation of the Minister of State and Environment No.48 of 1996, the Laboratory of PDAM Tirta Daroy has two roars, namely the testing room and the operator room, the measurement from the test room, the LS (day measurement) value is 62 dB, while the value measurement of the operator space, the value of the LS (day measurement) is 55 dB and the measurement of the average value of the examiner room and the space operator, the value of the LS (day measurement) is 55.20202 dB.
Kualitas Pelayanan Terhadap Kepuasan Pelanggan Menggunakan Metode Customer Satisfaction Index dan Importance Performance Analysis Pada PT. PLN (Persero) Area Meulaboh Sofiyanurriyanti Sofiyanurriyanti; Yola Tri Amanda; Arie Saputra; Marlinda Marlinda; Iing Pamungkas; Indra Kusuma
Jurnal Optimalisasi Vol 7, No 2 (2021): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v7i2.4341

Abstract

The level of customer satisfaction with service is an important factor in developing a service provision system that is responsive to customer needs. Based on the results of this study, namely the results of the CSI calculation, the customer satisfaction index value for the services provided by the PLN Meulaboh Area is 86% on a scale range of 85% < X 89% so that it can be said that the level of customer satisfaction there is generally in the Very Good category. means very good but there is still a sense of dissatisfaction from customers of PT. PLN (Persero) Meulaboh Area is 14%, therefore the service level of PT. PLN (Persero) Meulaboh Area should be further improved. Based on the results of the calculation of the level of conformity with the interests of the customer, it can be seen clearly from the Cartesian diagram, where there are 6 attributes that need to be repaired immediately, namely (P6) the accuracy of each record made by the meter reader officer, (P10) The condition of the KWH meter (turnover of numbers). according to the amount of usage), (P11) the speed of response in serving requests for submitting new pairs or changes in power, (P13) the lack of speed in the procedures for installing new connections or simple power changes, (P16) smooth processing of electricity payments through local banks and (P16) P24) compensation to customers for mistakes made by officers.
OPTIMALISASI KINERJA TEKNIS PENGELOLAAN DAERAH IRIGASI JAMBO AYE DAN ALUE UBAY DI KABUPATEN ACEH UTARA Rita Hartati; Marlinda Marlinda
Jurnal Optimalisasi Vol 5, No 2 (2019): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v5i2.1277

Abstract

This study of research is to optimize and evaluate the technical performance of irrigation management in Jambo Ayen and Alue Ubay Irrigation Area in North Aceh District, so that the existing water resources system and the advantages of the two irrigation areas can be known. The experimental design used in this study is by literature study, and secondary data collection at several agencies. The results of this study indicate that the optimization of the average value of total efficiency ratio of water demand volume to water intake volume in Jambo Aye Irrigation Area is 81% and Alue Ubay 69%. Optimization of relative water supply in Jambo Aye irrigation area shows an average value of 2.82, irrigation area of Alue Ubay 2.33. The irrigation areas of Jambo Aye and Alue Ubay have average RPPA values with good category, that is 0.8-1.1. the indicator of maintenance of building effectiveness in Irrigation Area of Jambo Aye and Alue Ubay is 1. So it can be concluded that the optimization of the mean value of the total efficiency ratio of the volume of water demand to the volume of air intake is obtained to exceed the standard value of the technical irrigation network level.
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.
Optimalisasi Pemanfaatan Khitosan Sebagai Pengawet Ikan Teri Kering (Spratelloides Gracilis) Marlinda Marlinda; Rita Hartati
Jurnal Optimalisasi Vol 6, No 1 (2020): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v6i1.1889

Abstract

This study aimed to determine the optimum concentration of the use of chitosan in dried anchovies to produce maximum preserved dried anchovies. The anchovies used were 300 grams of wet anchovies in each treatment sampel. The sampel is divided into thee parts, namely sampel 1 with the addition of chitosan each of 1%, 2% and 3%. The results showed that the water content were 33,6%, 33,4% and 32,8% respectively.  While the microbiological test showed that the use of chitosan 3% in dried anchovies has a TPC (Total Plate Count) value has an average value lower than dried anchovies with the use of chitosan as much as 1% and 2%. The preferred organoleptic test is dried anchovies which uses chitosan as much as 3% in the parameter of color, visual, aroma and taste. The Results of the study concluded that the most optimal use of chitosan as preservative in the production of dried anchovies was 3%.
OPTIMALISASI KARAKTERISTIK NATA DE BANANA SKIN MELALUI PERUBAHAN KONSENTRASI ACETOBACTER XYLINUM Marlinda Marlinda; Rita Hartati
Jurnal Optimalisasi Vol 5, No 2 (2019): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v5i2.1316

Abstract

This research aimed to determine the optimum concentration of Acetobacter xylinum to produce maximum nata de banana skin. The banana peel was used as a medium with Acetobacter xylinum added with concentrations of 10%, 20%, 30%, 40% of 400 ml of media solution. The results showed that the thickness of nata de banana skin with treatment variation were 0.77cm, 2.09cm, 2.77cm, 2.38cm, yield of 22.6%, 42.3%, 51.4%, 46.4%, and water content 87,6%, 86,6% 85,8% 86,2%. The preferred organoleptic test is at 30% concentration in the form of color, taste and suppleness. The result of research can be concluded that Acetobacter xylinum optimum concentration to produce the maximum of nata de banana skin is 30% for thickness, rendement, moisture content and organoleptic test of nata de banana skin.  
IDENTIFIKASI KADAR KATEKIN PADA GAMBIR (Uncaria Gambier Roxb) Marlinda Marlinda
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.v4i1.1474

Abstract

This study aimed to identify levels of catechins in gambier. The sample used is Gambir taken in the market with differences in terms of color, shape and packaging. Solid Gambir is mashed and added with water until it becomes a paste and then filtered to produce pure gambier extract. Furthermore, it was deposited and dried then crushed and sieved with a size of 60 mesh. Samples were dissolved with ethyl acetate and ethanol in a ratio of 1:10 and then dried and tested for catechin content, tannin content, water solubility and ash content. The results showed that catechin levels in G1 samples were 50.81%, G2 samples were 40.60%, and G3 samples were 30.70% while tannin levels in G1 samples were 11.50, G2 samples were 17.21 and samples G3 of 23.51. The result of the research concluded that there were differences in the amount of catechins in the three study samples. The best catechin levels were found in the G1 sample as much as 50.81%, then the G2 sample as much as 40.60%, and the G3 sample as much as 30.70%. While the tannin content has an inverse amount of concentration than concentrates. The more the amount of katekin in gambier the lower the amount of tannin.
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.
Co-Authors Abdiel Khaleil Akmal Adib Adib Adib Adib Arie Saputra Endi Saputra Hanif Muchdatul Ayunda Iing Pamungkas Indra Kusuma Irwanda Irwanda Kasmawati Kasmawati Mustafa Kamal Prasasti Abdillah Rahmi Puspita Risnadi Irawan Rita Hartati Sofiyanurriyanti T. M. Azis Pandria Yola Tri Amanda Yusi Hidjrawan