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Journal of Green Science and Technology
Published by Universitas Swadaya Gunung Jati
ISSN : 25981277     EISSN : 26213966     DOI : https://doi.org/10.33603/jgst.v9i1
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Transportation
Journal of Green Science and Technology (JGST) published since 2017 by Faculty of Engineering Universitas Swadaya Gunung Jati Cirebon, Indonesia with p-ISSN 2598-1277 and e-ISSN 2621-3966. JGST publishes twice a year in March and September. Publications before 2023 can be seen here. Journal of Green Science and Technology (JGST) has been accredited by National Journal Accreditation (ARJUNA) Managed by Ministry of Research, Technology, and Higher Education, Republic Indonesia since year 2022 to 2022 according to the decree No. 230/E/KPT/2022. Journal of Green Science and Technology (JGST) accepts and publishes multidisciplinary research and critical review of issues that contains of all scientific works related to the field of following Sciences Engineering: - Civil Engineering - Architectural Engineering - Environmental Engineering - Chemical Engineering - Mechanical Engineering - Electrical Engineering - Industrial Engineering - Informatics Engineering, etc. All manuscripts must be written in English.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 122 Documents
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DETERMINATION OF WATER QUALITY INDEX (WQI) CENTRAL JAVA PROVINCE WATER BODY BASED ON TOTAL COLIFORM Iva Yenis Septiariva; Hashfi Hawali Abdul Matin; Novi Kartika Sari; Ariyanti Sarwono; I Wayan Koko Suryawan
Journal of Green Science and Technology Vol 5 No 2 (2021): VOL 5, NO 2 (2021): JOURNAL OF SCIENCE AND TECHNOLOGY VOL. 5 NO. 2 SEPTEMBER 2021
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v5i2.5752

Abstract

In recent years, the Central Java Province municipal river's water quality in the area is classified as heavily polluted. Therefore, research on water quality and its pollution level needs to be carried out in the Surakarta municipal river, especially in the Central Java Province. This study aimed to determine water quality and the pollution conditions in the Surakarta municipal river and analyze the conditions of the pollution load in the river at a predetermined observation point. This research was conducted using a survey method field with secondary data. The analysis was carried out using the method water quality index (WQI). The results showed The WQI change from heavily polluted to lightly polluted was measured at several observation locations from 2016 to 2018. The changes in the measured pollution index from 2016 to 2018 by coliform.
STUDY OF THE EFFECT OF THE USE OF ADDITIONAL ADDITIVES DAMDEX AND BESTMITTEL ON THE COMPRESSIVE STRENGTH OF CONCRETE f'c 20 MPa. Dina Heldita
Journal of Green Science and Technology Vol 5 No 2 (2021): VOL 5, NO 2 (2021): JOURNAL OF SCIENCE AND TECHNOLOGY VOL. 5 NO. 2 SEPTEMBER 2021
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v5i2.5821

Abstract

Under normal circumstances, the maximum strength of the concrete will be reached at the age of 28 days, but to achieve the initial maximum strength of the concrete can be done in 2 ways, namely the use of Portland cement or the use of mineral additives or chemical admixtures. Another purpose of the use of admixture is the fulfillment of a short concrete execution time but the performance of the concrete is maintained.This study aims to determine the comparison of the compressive strength (N/mm2 unit) of normal concrete with concrete that uses Damdex and Bestmittel added materials, the test object used is cylindrical with the percentage addition of Damdex 2% and Bestmittel 0.2% of the weight of cement with composition the mixture used using the Job Mix Formula f'c 20 MPa for the Block B/F Heavy Rehab work project, Kotabaru District Prosperity Market Complex, namely for 1 m3 using 442.00 kg of cement, 681.79 kg of fine aggregate, 1065.72 kg of coarse aggregate , 215 liters of water. With the age of the tested concrete the compressive strength is 14 and 28 days.The results of the normal concrete compressive strength test at 14 and 28 days on average were 20.33 MPa and 22.19 MPa from the design compressive strength (f'c) of 20 MPa. Meanwhile, for the mixture with 2% Damdex and Bestmittel 0.2% added materials at 14 and 28 days the average was 22.93 MPa and 20.76 MPa from the design compressive strength (f'c) 20 MPa..Keywords: Concrete Quality, Damdex, Bestmittel, Compressive Strength
THE SURVIVAL OF NORTH KANOMAN “CITY VILLAGE” AS AN ART AND CULTURAL VILLAGE IN CIREBON CITY Jafar Mukhlis; Mira Lestira Hariani; Muhfidlatul Qira'ati
Journal of Green Science and Technology Vol 5 No 2 (2021): VOL 5, NO 2 (2021): JOURNAL OF SCIENCE AND TECHNOLOGY VOL. 5 NO. 2 SEPTEMBER 2021
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v5i2.6041

Abstract

Cities are the result of social interactions that form a community and produce culture. cultural resilience as a term that describes the extent to which a person's cultural strength in overcoming regional developments. Cirebon City as a City of Culture is inseparable from the history and culture of the past that form the characteristics of its own people. The City Village that still survives today is the North Kanoman Village, which is in the Kanoman Palace area. Cultural and artistic traditions are still maintained from generation to generation so that the characteristics of local wisdom are well preserved, so it is necessary to study the survival of the North Kanoman village in changing the development of a modern city. This study aims to determine the adaptation of the local wisdom of North Kanoman Village as an art and culture village in Cirebon City in an effort to maintain its existence as an art village in the midst of urban development. The output of this research is the modeling of the resilience of North Kanoman Village. The research uses a qualitative approach through qualitative descriptive analysis techniques. In this study, the method used is to use open interviews to examine and understand the attitudes, views, feelings and behaviors of individuals or groups of people. Based on the results of the study, it was found that the phenomenon of survival and adaptation methods were carried out by the North Kanoman community, this adaptation was closely related to changes in attitudes that occurred in the community. The synergy between the community and cultural leaders occurs in how to maintain culture and art for the younger generation from urban modernity and the era of digitalization. By adapting, the people of North Kanoman Village try to survive and continue their lives. Keywords: Survival, Urban Village, City Development, Local Wisdom, Arts and Culture
FACTORS RELATED TO WORK ACCIDENTS ON WASTE MANAGEMENT WORKERS (CASE STUDY IN FINAL PROCESSING PLACE : PECUK INDRAMAYU DISTRICT AND GUNUNG SANTRI CIREBON DISTRICT) IN 2020 mei nurhayati
Journal of Green Science and Technology Vol 6 No 1 (2022): VOL 6, NO 1 (2022): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY VOL. 6 NO. 1 MARCH 20
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v6i1.6445

Abstract

The role of waste management personnel who work every day to overcome the dangers of environmental pollution due to waste, these workers are at risk of work accidents. The aim is to find out the factors related to work accidents in waste management personnel. Using cross sectional and focus group discussion. The total sampling is 33 respondents. Workers who have an accident will be treated with First Aid in Accidents, even the Environmental Service will follow up. Variables related to work accidents are working hours (ρ=0.023), age (ρ=0.005), fatigue (ρ=0.027). Working hours variable with regression coefficient value = 0.061, age variable with regression coefficient value = 0.020. First Aid in Accidents at work still does not meet the requirements, and workers also do not use complete Personal Protective Equipment. Variable hours of work, age, fatigue associated with work accidents. There is no dominant factor associated with work accidents. It is necessary to hold an Occupational Health and Safety program. Keyword: Work Accident Factors, Waste Management Personnel, Final Processing Place.
THE EFFECT OF WATER RESISTIVITY ON THE CORROSION RATE OF STEEL PLATE IRRIGATION IN LABORATORY puji astuti ibrahim
Journal of Green Science and Technology Vol 6 No 1 (2022): VOL 6, NO 1 (2022): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY VOL. 6 NO. 1 MARCH 20
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v6i1.6479

Abstract

Corrosion is one of the processes of metal damage or degradation due to redox reactions between a metal and various substances in its environment that produce undesirable compounds. In the water one of the environmental parameters is water resistivity. By knowing the connection between water resistivity and corrosion rate, it is possible to monitor laboratory tests with water environments that have different levels of corrosiveness. Therefore, it is necessary to conduct an analysis to determine the effect of water resistivity on water corrosivity, understand the factors that influence the corrosion rate and calculate the corrosion rate of the irrigation gate steel plate on the water environment. This analysis uses a laboratory scale, analysis with talagasari irrigation water media, domestic wastewater, PDAM water and dead river estuary water. All water media used have a high level of corrosiveness. The factor that causes the low resistivity value is the large amount of inorganic minerals containing metal in the water so that at low resistivity values the corrosion rate increases. In the results of this laboratory analysis, it is proven that the more acidic the water medium, the faster the corrosion rate and the more alkaline the water medium, the slower the corrosion rate.
LOW CARBON CONCRETE: CEMENT REPLACEMENT UTILIZING FLY ASH Dimas Langga Chandra Galuh; M Afif Shulhan; Iskandar Yasin; Sukiyono Sukiyono
Journal of Green Science and Technology Vol 6 No 1 (2022): VOL 6, NO 1 (2022): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY VOL. 6 NO. 1 MARCH 20
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v6i1.6495

Abstract

Reducing the cement content in concrete is the need for environmental sustainability, as cement produces a significant carbon emission. This work aims to study the effect of partial replacement of the cement utilizing fly ash at the various percentage of substitution by investigating the physical characteristic of concrete ingredients, compressive testing at various curing age, workability, and material cost reduction. Fly ash used in this research is categorized as type F, which obtained from Jepara powerplant. Along with fly ash, ordinary pozzolan cement (OPC) from Semen Gresik used as binder material. The fine and coarse aggregates quarried consecutively from Magelang Regency and Kulon Progo Regency, Indonesia. All the constitutes being observed on specific gravity, gradation test, clay lumps content, and abrasion resistance. The job mix formula developed adopting Indonesian Standard based on the physical data obtained previously, resulting in five levels of cement replacement which is 0%, 15%,20%, 25%, and 30% compared to cementitious weight. Concrete cylinder specimen having 150 mm on the diameter and length of 300 mm, tested at various age (7,14, and 28 days) to obtained compressive strength and strength development during curing age. The current works remarks that all level of replacement obtained a good agreement with targeted compressive strength (25 MPa) at the age of 14 days. However, the more fly ash supplemented in the mixture, strength development possesses a slower rate and a slight declining on workability. Eventhough the slump value still comply with the requirement given by the Indonesian Standard.
USING DRONES FOR LANDFILL MONITORING AND PROJECTION CALCULATION Yackob Astor; Aditia Febriansya; Retno Utami; Muhammad Rizki Firdaus; Farhan Arradzumar Gustaman; Saepul Fariz
Journal of Green Science and Technology Vol 6 No 1 (2022): VOL 6, NO 1 (2022): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY VOL. 6 NO. 1 MARCH 20
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v6i1.6733

Abstract

ABSTRACT: Until now, monitoring the landfill volume in the Sarimukti landfills is calculated by the ratio of trucks converted from tonnage to volume based on the density of the landfill. The various truck specifications and the landfill density conversion process affect the tonnage value. This has an impact on the accuracy of the landfill volume calculation results. This research uses drones as the main tool for monitoring Sarimukti landfills by making a 3D map of the landfill in 2021 as a reference for calculating the volume of existing landfill. The analysis was carried out by comparing the existing landfill volume with the projected landfill volume in 2025 according to the operational period of the landfills. The results of the analysis show that the Sarimukti landfills can no longer accommodate landfill by 2023.Keywords: Drone, Landfill, Contour
THE EFFECT OF THE USE OF GBFS AS A MEDIUM AGGREGATE SUBSTITUTION ON THE PERFORMANCE OF THE AC-WC ASPHALT MIXTURE Panji Marshando
Journal of Green Science and Technology Vol 6 No 1 (2022): VOL 6, NO 1 (2022): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY VOL. 6 NO. 1 MARCH 20
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v6i1.6809

Abstract

The massive use of natural materials in major road infrastructure frequently disrupts the sustainability of the ecosystem in the environment. A solution for using other materials is needed to minimize the impact of using these natural materials. GBFS (Granulated Blast Furnace Slag) is waste from blast furnace combustion of iron and steel material in granular form, which characteristically can be used as a substitute for medium aggregate asphalt mixture material. The study was conducted by several testing, such as GBFS material testing, AC-WC asphalt mixture characteristic test using Absolute Density Method, and performance testing on AC-WC asphalt mixtures, based on its structural performance and dunctional performance with the percentage of GBFS as medium aggregate variation at 0%, 50%, 75%, and 100%. The study results show that the utilization of the percentage of GBFS as a medium aggregate substitution by 75% improves functional performance and structural performance of AC-WC asphalt mixture.Keyword: GBFS, Asphalt Mixture, AC-WC, Medium Aggregate.
DEVELOPMENT OF ECO-FRIENDLY MORTAR UTILIZING INDUSTRIAL WASTE M Afif Shulhan; Zainul Faizien Haza; Maris Setyo Nugroho
Journal of Green Science and Technology Vol 6 No 2 (2022): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY VOL.6 NO.2 SEPTEMBER 2022
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v6i2.6890

Abstract

Introducing alternatives material on cement-based material manufacturing is the need for environmental sustainability due to the excessive mining of sand from quarry and river bed. At the same time, industrialization headed to an uncontrollable growth of waste. This fact encourages the researcher to enhance the utilization of recycled waste in construction practice. On one side, it affords a solution for waste management, and on the other hand, it contributes to an eco-friendly construction material that minimizes the environmental impact. This paper aims to investigate the usability of the iron waste obtained from the wrought iron industry, as natural fine aggregates replacement. In particular, it focused on studying the physical characteristic of waste aggregates and the effect of partial replacement of natural sand on mortar strength. Mortar cube specimen made with various levels of replacement (0%, 10%, 20% and 30 %) and also various cement-aggregates volumetric proportion, which are 1:3, 1:4, 1:5, 1:6, and 1:7. All of the measurement parameters are taken consecutively based on ASTM norms. The current work remarks that both waste aggregates and natural aggregates reveal complete fulfillment in the aggregate requirement of ASTM standard. Furthermore, the mortar cube test confirmed that the mortar passes the strength grade for N class and O class, which suitable for the above-grade and non-load bearing application.
THE EFFECT OF SALINITY ON OXYGEN TRANSFER PROCESS IN LEACHATE WITH A LOW INITIAL COD CONCENTRATION Moh Rizal Ngambah Sagara; Mega Mutiara Sari; Iva Yenis Septiariva; I Wayan Koko Suryawan
Journal of Green Science and Technology Vol 6 No 2 (2022): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY VOL.6 NO.2 SEPTEMBER 2022
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v6i2.6911

Abstract

Leachate is one of the results of rainwater infiltration and the degradation of microorganisms in waste. Some leachate types usually contain salinity which is an inhibitor in biological treatment processes. Aerobic biological treatment usually also requires sufficient dissolved oxygen (DO) levels. This study aimed to determine the effect of salinity on oxygen transfer in saline leachate. This study used a DO meter to measure the DO concentration in the 2 L volume reactor. There were two variations, namely leachate without salinity and with salinity 6 ppt, where the processing was carried out with three repetitions. The final oxygen transfer coefficients for the leachate without salinity and with salinity were 0.021 and 0.014, respectively. While the detention time required for leachate without salinity is 47.5 minutes, it takes 71.43 minutes with salinity.

Page 7 of 13 | Total Record : 122

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