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Journal of Research and Technology

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Published by Universitas NU Sidoarjo

ISSN : 24605972 EISSN : 24776165 DOI : -

Chemical Engineering, Chemistry & Bioengineering Engineering Environmental Science Industrial & Manufacturing Engineering

Journal of Research and Technology published since 2015 contains a collection of a selected articles from the results of research and study of literature which is relevant to industrial , chemical, and environment engineering. Target readers of the Journal of Research and Technology are scientists, academics, and practitioners from various fields of industry.

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Articles 454 Documents

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PENGARUH MICROWAVE HEATING TERHADAP KUALITAS MINYAK DEDAK PADI Yulia Tri Rahkadima; Medya Ayunda Fitri
Journal of Research and Technology Vol. 4 No. 2 (2018): JRT Volume 4 No 2 Des 2018
Publisher : 2477 - 6165

Rice bran oil as an alternative edible oil is promising to be developed. However, the presence of lipaze enzym which hydrolyze actively trigliceride into free fatty acid results rice bran quality can not be controlled and tend to degrade. Stabilization proccesswas needed to overcome this isue. Stabilization with microwave heating has been carried out to study the effect of stabilization toward the quality of rice bran oil. The results showed that the highest percentage of oil mass 7.67% was obtained at mediumpower (power 2), stabilization time 1 minute and the extraction waiting time for 0 week. Meanwhile, the levels of free fatty acids tended to be constant when the proccess was carried out at power 3 (high power) for all stabilization times. Microwave heating was effective enough to reduce the lipase enzyme in rice bran so as free fatty acid content did not increase significantly. Keywords: Microwave Heating, Rice Bran Oil, Stabilization.

PENENTUAN HASIL EVALUASI PEMILIHAN SPESIES POHON DALAM PENGENDALIAN POLUSI UDARA PABRIK SEMEN BERDASARKAN KARAKTERISTIK MORFOLOGI Fiona Azzahro; Yulfiah; Anjarwati
Journal of Research and Technology Vol. 5 No. 2 (2019): JRT Volume 5 No 2 Des 2019
Publisher : 2477 - 6165

The rapid development of the country in Indonesia, especially in the fields of industry and technology, is inseparable from the problem of air pollution, especially in the environment, namely pollutant gas and dust. Air pollution needs to be environmentallyfriendly by increasing the amount of vegetation or reforestation by planting tree species that have the ability to grow and absorb pollutant gases and absorb dust particles in polluted environmental conditions. The study uses descriptive analysis by assessing tree elements macroscopically to select the appropriate tree species and can be recommended as an absorber of gas pollutants and dust absorbers based on tree suitability scoring. The results showed that of 7 (seven) dominant tree species identified, there were 3 (three) dominant tree species that were very suitable, 3 (three) dominant tree species were suitable, and only 1 (one) dominant tree species were not suitable for air pollutant gas. Whereas the evaluation of the function of dust particle absorptionshows that all dominant tree species studied have the appropriate criteria in absorbing dust with the acquisition of 65% -75% evaluation value. Keywords: Dust, Pollutant, Tree.

PENURUNAN KADAR COD MENGGUNAKAN SARINGAN PASIR DUAL MEDIA PADA PENGOLAHAN AIR MINUM Hamidah, Laily Noer; Rahmayanti, Ardhana
Journal of Research and Technology Vol. 6 No. 1 (2020): JRT Volume 6 No 1 Jun 2020
Publisher : 2477 - 6165

Allowance for COD content in raw water can use a dual media sand filter. Sand filters have various advantages, namely low-cost and environmentally friendly operational costs and are able to produce quality processed water that meets quality standards. This study uses a dual media sand filter with dimensions of sand and gravel depth of 40 cm and 20 cm respectively, running the reactor for 15 days (sampling every 2 days) with 14 days of acclimation. The purpose of this research is to obtain the optimum flow rate from the sand filter reactor in setting aside COD in raw water. The results showed a dual media sand filter reactor unit with a flow rate of 0.3 m3 / m2.hour has a higher efficiency in setting aside COD compared to a reactor with a flow rate of 0.2 m3 / m2.hours which is 52.3%, where the magnitude This removal efficiency is influenced by biological processes in the form of bacterial activity in the schmutzdecke layer and chemical processes in the form of adsorption.

ANALISIS PENGARUH KUALITAS PELAYANAN AKADEMIK TERHADAP LOYALITAS MAHASISWA UNUSIDA DENGAN PENDEKATAN PARTIAL LEAST SQUARE (PLS) Untung Usada; Luqman Hakim; Anita T. Kurniawati
Journal of Research and Technology Vol. 2 No. 2 (2016): JRT Volume 2 No 2 Des 2016
Publisher : 2477 - 6165

University does not only provide graduates in quantity but also concern about the quality and high discipline,capable of being dinamisator, innovator, motivator and agent of change and to thread high quality of human resources for the various types and levels of expertise. University should care to students’ service quality. University of Nahdlatul Ulama Sidoarjo is a new university in Sidoarjo. This University insists to improve the service quality. Service improvement is expected to affect the students’ satisfaction and trust. So it will be impected on students’ loyalty. The purpose of this study is to identifythe impact of satisfaction level of service quality and trust which are expected to affect the students’ loyalty. The method used in this study is Partial Least Square (PLS), SmartPLS 2.0. The analysis results of existing models shows that service quality has an important role in keeping the students’ loyalty. For students, excellent service will give satisfaction and trust so the loyalty can be risen. Keywords: Service quality, Customer loyalty, Partial Least Square (PLS).

PENGARUH KONSENTRASI SURFAKTAN DAN KECEPATAN PUTAR PENGADUK TERHADAP PROSES PEMISAHAN BITUMEN DARI ASBUTON Nora Amelia Novitrie; Susianto; Ali Altway
Journal of Research and Technology Vol. 2 No. 2 (2016): JRT Volume 2 No 2 Des 2016
Publisher : 2477 - 6165

Asbuton is a rock contain of the bitumen. Asbuton can be used as road construction alternatives after extracting bitumen from the mineral. A method for separating bitumen is separation process using hot water medium. The process was carried out in a stirred tank, 200 grams of asbuton was mixed with diesel oil and added by hot chemical solution (surfactant) in the digestion tank. The separation process in the extractor was made at 900C and time set was 30 minutes. Surfactan concentration and the speed of stirrer were set according to the variable. After the process completed, the mixture was moved into a beaker glass and 500 ml hot water was added. The mixture of diesel oil and bitumen will float in the surface then the density will be measured to determine the bitumen concentration. It can be concluded that concentration of surfactant solution and speed of stirrer have the significant results. The highest recovery percentage of bitumen is 81,99 %. Keywords: Asbuton, Hot water, Speed of stirrer, Surfactant.

PENGEMBANGAN TEKNIK PRODUKSI MASSAL BIOMAS ECENG GONDOK Tatuk Tojibatus Sa’adah; Dwi Haryanta
Journal of Research and Technology Vol. 2 No. 2 (2016): JRT Volume 2 No 2 Des 2016
Publisher : 2477 - 6165

Siltation and the presence of water hyacinth plants on a sewer/river is a cause of flooding in urban areas (beaches). Water hyacinth grows fast in rivers, sewer, boezem, lake and or water storage areas, which impedes the water flow and encourages a silting. Rivers dredging or reservoirs of waste water hyacinths just stacked on the edge of river that makes the dirty environment. The research aims to develop a composting technique made from water hyacinth in a mass scale. Factorial experimental treatments (1) Packaging B1: open, B2: plastic bags (glangsing), and B3: buried; and (2) Starter S1: mixture EM4 30%, S2: mixture EM4 20% + urea 1kg/3 liter, and S3: mixture EM4 10% + urea 2 kg/3 liter, so there are nine treatment combinations. Experimental units are water hyacinth biomass as much as one cubic, nine cubic overall. The research results devoted to volume shrinkage, variable temperature, pH, change in smell, colour and biomass texture of water hyacinth during the first two weeks showed a high variation among treatments, but in the fifth week, all of variables were homogeneous relatively and showed almost complete indicators of composting process. Depreciation amounted to 68-78% volume, temperature 26-29oC, pH of 7.0-7.5; texture is brittle, blackish brown color and relatively odorless. C/N biomass ratio at composting mass of water hyacinth from 33-37, and at fifth week the results are varied for the treatment of S1, S2B1, and S3B1 value is still above 20 while the other is below 20, and the lowest at 16.9 S3B3 treatment. Keywords: Composting technology mass, Water hyacinth biomass, Starter, Packaging

PERANCANGAN PREDIKSI FINANCIAL DISTRESS PADA PERUSAHAAN MANUFAKTUR YANG TERDAFTAR DI BURSA EFEK INDONESIA Rina Sri Wulandari
Journal of Research and Technology Vol. 2 No. 2 (2016): JRT Volume 2 No 2 Des 2016
Publisher : 2477 - 6165

The global economic crisis led many companies especially manufacturing companies be through financial distress. Financial distress is a situation where firms in difficulty conditions before be through bankruptcy. Predictions on the financial conditionimportant by manager, auditors, and investors to make policy decisions. The more accurate the predictions were done, the risk are guaranteed getting smaller either by companies or investors. Therefore, this study aimed to design a prediction model offinancial distress companies listed on the stock exchange Indonesia. This study uses the Data Envelopment Analysis (DEA) method. DEA method used to measure the efficiency of the company. The company that inefficient indicate that the company isthreatened with bankruptcy. Ratios of the company’s financial statements are used as data to be processed using the DEA method. Keywords: Financial distress, Data Envelopment Analysis (DEA), Efficiency.

PEMBUATAN PURWARUPA SISTEM INFORMASI PERSEDIAAN OPTIK STUDI KASUS: UD AGNES, MALANG prasetyo, waluyo
Journal of Research and Technology Vol. 2 No. 2 (2016): JRT Volume 2 No 2 Des 2016
Publisher : 2477 - 6165

UD Agnes/Agnes Optic (AO) was established in 1990 and located at Jalan Imam Bonjol Kota Batu in Malang. This business is engaged in optical products and services. In this study, the research focus is product of eyeglass lenses. OA business development process has faced obstacles in inventory problem and manual restock process. During this time inventory management has not been managed well so it takes a long time to check inventory stock. EOQ method is used to calculate the inventory in gaining restock time and reduce stock inventory searching time so as to produce information about costs and benefits in each period. The result obtained are optimal restock time period for each stock, reduction of searching time inventory, information cost, and the profit obtained by AO. Keywords: Optical Product, Stock, EOQ, Restock.

ATAP DESALINASI SEBAGAI SOLUSI PEMENUHAN KEBUTUHAN AIR BERSIH DI DAERAH PESISIR Ulvi Pri Astuti
Journal of Research and Technology Vol. 2 No. 2 (2016): JRT Volume 2 No 2 Des 2016
Publisher : 2477 - 6165

Seawater or brackish water processing technology to freshwater was known as desalination. Process desalination of evaporation is one of the desalination technique, that effective and economics especially to a coastal area that have larger sun intensity than another. Therefore, in this research will discuss about designing house roof society in coastal region. Tub evaporative and basic tub plate planning size that made for 4,5m x 10m house of floordeck 600 coated with 5,4 cm concrete thick mess. Tub evaporativesize is 3m × 10m × 0,02m. Collective freshwater channel are besides the tub with size 0,75m × 10m. The sketch of roof used easel that made of galvalume profile C 100mm × 50mm × 20mm × 4mm and gording is made of hollow 40mm × 40mm × 0,5mm. Outside cover roof is polytron polycarbonate with 4,2 mm thickness and inside roof fiberglass with 1 mm thickness. Freshwater volume can be produced by tub space 3m × 10m × 0,003m is 89,74 L by seven hours heating process on 485 W/m2 sun intensity. Keywords: Evaporative Desalination, Floordeck 600, Polycarbonate.

ANALISIS SIFAT MEKANIK KOMPOSIT Al 2075 REINFORCEMENT DENGAN ELECTROLESS ABU DASAR BATUBARA Adhi Setiawan; Arita Rochma Nilasari; M. Ari
Journal of Research and Technology Vol. 2 No. 2 (2016): JRT Volume 2 No 2 Des 2016
Publisher : 2477 - 6165

Aluminium composite 2075 manufacturing required a strenghthener such as bottom ash which has been through the electroless plating process that serves coating the bottom ash and sticks to aluminium casting process. The oxidation of 100oC produce 0,0126 µm Mg thickness oxidation, 200oC produce 0,0146 µm Mg thickness oxidation, and 300oC produces 0,0506 µm Mg thickness oxidation. Mechanical properties were tested by using worn-out test and hardness test based on new material function that will be used to replace existing disc brake material. Harness test showed that castings are using oxidized ash powder with higher temperature and produce resistant material than in low temperature. Casting mixture with oxidized bottom ash 100oC produce specific abrasion of 2,008 x 10-6mm2/kg, produce of1,814 x 10-6mm2/kg for oxidized 200oC, and produce of 1,675 x 10-6mm2/kg for oxidized 300oC. Keywords: Aluminium 2075, Bottom ash, Composite, Electroless plating, Hardness test, Worn-out test.

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

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Contact Name Muchammad Tamyiz

Contact Email muchammad_tamyiz@yahoo.com

Phone -

Journal Mail Official muchammad_tamyiz@yahoo.com

Editorial Address -

Location Kab. sidoarjo, Jawa timur INDONESIA

Abstract

Abstract

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Abstract

Abstract

Abstract

Abstract

Contact Name
Muchammad Tamyiz

Contact Email
muchammad_tamyiz@yahoo.com

Phone
-

Journal Mail Official
muchammad_tamyiz@yahoo.com

Editorial Address
-

Location
Kab. sidoarjo,

Jawa timur

INDONESIA