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Journal of Research and Technology
Published by Universitas NU Sidoarjo
ISSN : 24605972     EISSN : 24776165     DOI : -
Core Subject : Social, Engineering,
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.
Arjuna Subject : -
Articles 454 Documents
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METODE PENGERINGAN AMPAS TEBU (BAGASSE) DENGAN PEMANFAATAN KEMBALI PANAS GAS BUANG BOILER DI PG. PRADJEKAN BONDOWOSO Solikin; M. Arif Batutah
Journal of Research and Technology Vol. 5 No. 1 (2019): JRT Volume 5 No 1 Jun 2019
Publisher : 2477 - 6165

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Abstract

At present the need for fossil fuels is very high, while reserves in nature are decreasing. For this reason, innovation is needed to find alternative energy from fossil fuels to alternative energy that is more environmentally friendly and can be renewed. The sugar factory as one of the Dutch heritage industries that produces solid waste in the form of bagasse can be used for boiler fuel. While the boiler exhaust gas (flue gas) from the chimney generated from burning fuel also causes air pollution can be used for drying bagasse so as to reduce the impact of pollution caused by the exhaust gas. The use of bagasse with a moisture content of around 49-52% as boiler fuel as one of the causes of burning in the combustion chamber is not perfect and causes air pollution. The high temperature of the smoke gas coming out through the boiler chimney around 220 C has a heat content of 13475.72 kW and still high levels of water in the pulp can certainly be used to dry bagasse using a dryer (Rotary Dryer) Through the use of flue gas that is wasted on the boiler chimney for bagasse drying, it can increase the heat value of bagasse 50,544 x 106 Kcal / hour for the production of bagasse 30 tons / hour, reduce bagasse water content up to 35,1%, increase thermal efficiency and reduce pollutants released into the surrounding environment.
Husband's Support for Regularity of Antenatal Care (ANC) (In the village polyclinic in Drenges Village, Sugihwaras District Bojonegoro Regency) Fajrin, Fitriana Ikhtiarinawati
Journal of Research and Technology Vol. 5 No. 1 (2019): JRT Volume 5 No 1 Jun 2019
Publisher : 2477 - 6165

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Abstract

This study aims to determine the support of the husband, know the regularity of antenatal care and analyse the relationship of husband's support for the regularity of antenatal care. This research is a descriptive analytic study with Cross Sectional approach. Sources of data were obtained from all pregnant women who examined at the village polyclinic in Drenges Village, Bojonegoro Regency on November 1, 2017 - May 1, 2018 with a population of 28 people. The sampling technique uses Total Sampling. Data collection techniques use primary data and secondary data. Primary data in the form of data about husband's support for antenatal care obtained from the questionnaire, while secondary data in the form of data about the regularity of antenatal care obtained from medical records and MCH books, then the data were analyzed descriptively and by statistical analysis using SPSS 22 correlation test. The results of this study indicate that the majority of husbands' support is lacking as many as 19 respondents (68%), the majority of respondents do not regularly conduct Antenatal Care examinations as many as 17 respondents (61%), the majority of respondents who received husband’s support regularly conducted Antenatal Care, namely 6 respondents (67%), and respondents who lacked husband's support, the majority of them did not regularly conduct Antenatal Care, namely 14 respondents (74%). From the results of the correlation test, the value of sig = 0,000 means that H0 is rejected and H1 is accepted. From the results of the correlation test also obtained a correlation coefficient of 0.8 which means that the support of the husband with the ANC regularity is very strong. The conclusions from this study are the relationship between husband's support and the regularity of the ANC with a very strong relationship.
PENURUNAN BIOCHEMICAL OXYGEN DEMAND (BOD) DAN TOTAL SUSPENDED SOLIDS (TSS) PADA PENGOLAHAN LIMBAH CAIR DOMESTIK DENGAN PROSES ANAEROBIK BIOFILTER Ayu Pramita; Eka Dyah Puspita
Journal of Research and Technology Vol. 5 No. 1 (2019): JRT Volume 5 No 1 Jun 2019
Publisher : 2477 - 6165

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Abstract

Domestic wastewater in the culinary area is waste water produced from several restaurants. The problem of liquid waste needs to get serious attention, because it has complex characteristics and the remaining results of these activities can cause the volume of wastewater with a high contaminant load that flows continuously over a long period of time. One way to manage the environment is through physical processing, namely by pre-treatment of sedimentation and biological treatment by biofilter anaerobic processes. Anaerobic biofilter is a biological treatment, which uses media as a place to grow and develop microorganisms, with no oxygen in the reactor. The parameters in liquid waste processing consist of three, namely physical parameters, chemical parameters and biological parameters. In the method of combating liquid waste here uses chemical parameters, namely BOD and TSS. Where BOD (Biochemical Oxygen Demand ) is the number of milligrams of oxygen needed by aerobic microbes to decompose karon organic matter in 1 L of water for 5 days at a temperature of 20˚C ±1˚C. Whereas for TSS (Total Suspended Solid) as the residue from total solids held by a filter with a particle size of maximum 2μm or greater than the size of colloidal particles, which include TSS are mud, clay, metal oxides, sulfides, algae, bacteria, and fungi . The aim of this research is that the liquid waste from the activity can be reused as clean water by anaerobic biofilter method using BOD and TSS parameters. The variables used are operational time. Reactor I and reactor II contain media arranged from the bottom up, namely rock fragments, gravel, shells and gauze. The operational time variations used are 0 hours as t0 or the first time the waste exits the reactor, and the time is 2 hours, 4 hours, 6 hours, and 8 hours is a periodic observation of operational time. The results showed that anaerobic biofilter has the ability to reduce the concentration of BOD (Biological Oxygen Demand) and TSS (Total Suspended Solid). Based on the Regulation of the Minister of Environment and Forestry of the Republic of Indonesia Number P.68 / Menlhk / Setjen / Kum.1 / 8/2016 concerning Domestic Waste Water Quality Standards, the characteristics of wastewater are obtained before treatment (pretreatment) which is 28- 31 ° C; pH 9,3-10; BOD 30 mg / L; and TSS 29 mg / L. Decreasing the initial state in reactor I for BOD is 25 mg / L. Whereas for the decrease in TSS is 16 mg / L. The results showed that anaerobic biofilter with pumice, gravel and clam shell media had the ability to reduce BOD and TSS concentrations significantly. The percentage decrease in concentration in reactor I was greater than that of reactor II, with an operational time of 6 hours for BOD allowance of 73,54%. While the operational time of 8 hours for TSS is 81,39%.
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
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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.
MEMBANDINGKAN REGRESI 4PL DAN LINIER FIT UNTUK VERIFIKASI HORMON 17β-ESTRADIOL MENGGUNAKAN METODE ELISA Arroofita Ani Sandiya; Sudjarwo; Ashon Sa’adi
Journal of Research and Technology Vol. 5 No. 1 (2019): JRT Volume 5 No 1 Jun 2019
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Abstract

One solution for infertile couples to get offspring is IVF, one of the stages is a HOT procedure. On the stage there is an increasing in steroid hormone levels (estrogen) as a result of ovarian follicles development. The 17β-estradiol hormone was chosen to be verified because it can be used as a marker or marker to show the maturity follicle. Linear and logistic regression are the two most commonly used in curve making models for ELISA sandwich immunoassays. Although linear regression may be useful when analyzing samples included in the linear part of the analyte response curve, logistic regression is the preferred for multiplex immunoassays. Verification of 17β estradiol hormone regression results using linear fit obtained the value of r=0.952 while the regression value used 4PL obtained result r=0.998. But the results shown in the verification of the 17β estradiol hormone good, this were evidenced by using of SPSS software. The value of F obtained was 78.712, where the value was greater than the value of F table (6.61) which means that the value of independent variable (concentration) on value of the dependent variable (optical density value). The linearity values ​​obtained through verification using the 4PL model indicates that the linearity of this method was better based on linear regression.
VERIFIKASI LINIERITAS KURVA BAKU TESTOSTERON MENGGUNAKAN METODE ELISA (ENZYME-LINKED IMMUNOSORBENT ASSAY) Muhammad Arif Hanny Ferry Fernanda; Ashon Sa’adi; Sudjarwo
Journal of Research and Technology Vol. 5 No. 1 (2019): JRT Volume 5 No 1 Jun 2019
Publisher : 2477 - 6165

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Abstract

Enzyme-Linked Immunosorbent Assay (ELISA) is one of the quantitative analysis methods that is often used to determine the levels of active compounds in biological samples. In this study we will verify the method of determining testosterone active compounds in blood and urine samples of female patients who have Polycystic Ovary Syndrome (PCOS) using the Human Testosterone ELISA Kit. Before conducting testosterone levels using ELISA, it is necessary to verify the linearity of the standard curve first to determine the effect of testosterone standard levels on the analyte response in the form of optical density. The linearity verification of the standard testosterone curve was calculated using linear regression calculations with determinant coefficient result was 0.978 and a value of α = 0.05. While for testing by using 4 parameter logistic (4PL) coefficient created, 0.999. Based on these results it can be concluded that the testosterone standard level has a significant influence on the response of optical density analytes.
ISOLASI FITOSTEROL DARI BAWANG MERAH (Allium cepa L.) Ahmad Musonnifin Aziz; Farikha Alfi Syahriyah; Ahmad Ihya’ Ulumuddin; Qurrota A’yuni
Journal of Research and Technology Vol. 5 No. 1 (2019): JRT Volume 5 No 1 Jun 2019
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Abstract

Shallot is one of the kitchen spices that is often used by the community. Shallot contains several useful compounds and one of them is phytosterol. Along with the development of science and technology, phytosterol can be used to reduce blood cholesterol levels and prevent heart disease, so it is very beneficial for human health. In this study, phytosterol compounds were identified and isolated. The dried onion was then pureed and sifted to 100 mesh. The sieved powder was then extracted by reflux extraction method within 6 hours. The results of the extract were then isolated by column chromatography and identified by Thin Layer Chromatography (TLC). The TLC test used -sitosterol as a standard and anisaldehyde reagent as a stain appearance. The TLC plate which had stained appearance was then analyzed using the TLC Scanner method. The results of the TLC test showed that the extract of positive red onion was purple and contained fitosterol. The results of the TLC Scanner also show that the peak and spectrum of the samples were the same as the standard -sitosterol and positively contained fitosterol.
Concentration and Time Exposure Determination of Methanol Extract from Carica papaya Leaves in The Larvicidal Activity Against Aedes aegypti Larvae Sudarwati, Tri Puji Lestari; M. A Hanny Ferry Fernanda
Journal of Research and Technology Vol. 7 No. 1 (2021): JRT Volume 7 No 1 Jun 2021
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v7i1.288

Abstract

Dengue Haemorrhagic Fever (DHF) is a disease caused by dengue virus which is transmitted through Aedes aegypti mosquito bite. Efforts to control the widespread of the vectors have been made using biological agents and also chemical compound. Chemicals known as a standard protocol have raised concerns about resistance and harmfulness to the environment. Hence, the present study was aimed to explore the larvicidal activity of papaya (Carica papaya) leaf extract against Aedes aegypti larvae in regards to the optimum concentration and time exposure.  Preparation the obtained extract was diluted to make a serial concentration. These solutions were made by pipetting 0.65 mL, 1.25 mL, 2.5 mL, 5.0 mL, and 10.0 mL of extract into 10.0 mL volumetric flasks and dilute with distilled water. The test solution was poured into a glass jar contained 90 mL of distilled water and filled with 20 third instar larvae. Each experiment was replicated four times. The larval mortality was recorded in 24h and calculated as a percentage of total larvae used in the experiment. The table above shows the value of LC50 And LT50 from toxicity assay of papaya leaf extract. According to the LT50 value, it can be seen that the lowest LT50 of 1,006h occurred at the concentration of 11000 ppm. Moreover, calculated LC50 is 4929,344 ppm. Based on these results, papaya leaves have the ability to Aedes aegypti larvaside so that it can help in breaking the chain of development of Aedes aegypti.  
Kemampuan Adsorben dari Limbah Serbuk Gergaji Kayu Jati terhadap Penurunan Kandungan Timbal (Pb) pada Limbah Cair dengan menggunakan Sistem Batch Firmanto, Rafli Puji; Rr. Diah Nugrahaeni Setyowati; Dedy Suprayogi
Journal of Research and Technology Vol. 7 No. 2 (2021): JRT Volume 7 No 2 Des 2021
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v7i2.305

Abstract

Teakwood sawdust is a by product of the sawmilling process used by industry and wood enterprises. One way to put the garbage to good use is to use it as a raw material for creating adsorbents for adsorbing heavy metals in waste water. The goal of this study is to use a batch system to investigate the ability of teakwood sawdust to adsorb lead (Pb) in liquid waste and to establish the optimal adsorption isotherm modeling in the adsorption process for the processing of lead (Pb) heavy metal waste. This is an experimental study that uses a variety of adsorbent masses, including 1 gram, 2 gram, 3 gram, 4 gram, and 5 gram, as well as a variety of adsorbent activation methods.According to the study's findings, variations in the mass of adsorbent used 4 gram resulted in average absorption of 81.14 percent and 94.15 percent, respectively, while variations in the adsorbent activation method with the activation process and variations in the adsorbent activation method without the activation process resulted in an average absorption of 81.14 % and 94.15 %. respectively, while the average value of the adsorption capacity in The adsorption model isotherm langmuir with R2 value of 0,6537 is suitable for the adsorption process employing teakwood sawdust adsorbent.  
Pengolahan Limbah Cair Industri Elektroplating dengan Proses Flotasi Menggunakan Methyl Ester Sulfonate (MES) sebagai Collector Laurentius Urip Widodo; Sholekhah, Bika Amalia; Hubbi Hikmatu Ilma
Journal of Research and Technology Vol. 7 No. 2 (2021): JRT Volume 7 No 2 Des 2021
Publisher : 2477 - 6165

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Abstract

Industrial waste is a major problem for countries that are developing large industries such as Indonesia. Industrial waste with heavy metal content such as electroplating waste cannot be disposed of directly into the water because it can cause environmental pollution. Therefore, further processing is needed to reduce or eliminate metal levels in the waste water. In this study, the method used to reduce Cu metal content in electroplating waste is using the flotation method. Flotation is the process of separating minerals or ions through flotation with the help of air bubbles to the surface of the water. The parameters observed in this study were the effect of pH and collector on % Cu removal. Experiments were carried out with waste water feed containing Cu metal with an initial concentration of 107.6 mg/L, with a variation of pH 4,5,6,7,8 and a variation of the concentration of 200 mg/L, 300 mg/L, 400 mg/L, 500 mg/L and 600 mg/L of collector. After being analysed using Atomic Absorption Spectrophotometer (AAS), the best% Cu removal at pH 6 conditions and 300 mg/L methyl ester sulfonate (MES) concentration was 67.19%.

Page 20 of 46 | Total Record : 454

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