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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan METANA Jurnal Ilmu Lingkungan IJHCM (International Journal of Human Capital Management) Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Jurnal Profesi Insinyur Indonesia
Nurandani Hardyanti
Environmental Engineering Department Diponegoro University
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics Social Sciences Transportation

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Analisis Perbandingan Quantity Take Off (QTO) Beton Menggunakan Metode Building Information Modelling (BIM) dan Metode Konvensional (Studi Kasus : Proyek Kantor PNM Cabang Jember) Amri, Salim Isfayama; Hardyanti, Nurandani; Sumiyati, Sri
Jurnal Profesi Insinyur Indonesia Vol 1, No 6 (2023): JPII
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpii.2023.19025

Abstract

Along with the world of construction that is growing, the stakeholders involved in it are trying to find methods and technologies that can make the activities contained in construction projects more efficient. Building Information Modeling (BIM) is one of the most widely applied technological developments in the world of construction. One of the benefits of implementing BIM is that it can produce Quantity Take-Off (QTO) data output based on the 3 Dimensional model that has been created. This research examines the PT Permodalan Nasional Madani Branch Office Building Construction Project in Jember City which performs QTO calculations using 2 methods, namely the conventional method and the BIM method. The purpose of this study is to find out the results of the calculation of the QTO of the Conventional Method and the BIM Method, then to compare the results of the calculation of the QTO of the Conventional Method and the BIM Method, and to analyze the reasons for the differences in the results of QTO calculations on the Conventional Method and the BIM Method. The conventional method of performing calculations is using Ms.Excel software with reference to 2D drawings from AutoCAD. The BIM method uses Autodesk Revit software by performing 3D modeling which is directly integrated with the quantity calculation. The QTO calculation is carried out on the need for concrete materials in the superstructure (columns, beams and slabs) of the building. The results of QTO Concrete using the BIM method on column work 41.59 m³, beams 33.29 m³, and floor slabs 154.39 m³. The total QTO of concrete for the superstructure using the BIM method is 229.23 m³. The results of QTO Concrete using the Conventional method on column work 44.36 m³, beams 58.79 m³, and floor slabs 154.54 m³. The total QTO of concrete for the superstructure using the conventional method is 257.68 m³. The difference in the QTO results of the BIM and conventional methods for column work is 6.24%, beams are 43.37%, floor plans are 0.12%. The difference in the highest QTO value is in the beam structure item. The total difference in volume of concrete between the conventional method and the BIM method is 28.45 m³ or 11.04%. The reason for the difference in QTO results between the BIM and Conventional methods is due to the double calculations in the Conventional method at each intersection point between columns, beams and plates. Whereas with the BIM method every meeting will be calculated only on one of the elements with the order of domination of the calculation from the highest, namely plate, column, plate.
Greenhouse Gas Emission Reduction Strategies in the Transportation, Waste, and Domestic Sectors Haryono Setiyo Huboyo; Nurandani Hardyanti; Isna Maulidya Durrotunnisa; Isnaini Haya Amani; Tarisa Farrelia Febriana
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 2 (2024): July 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i2.504-512

Abstract

Population growth in Pekalongan City leads to increased community activities, which in turn raises Greenhouse Gas (GHG) emissions in the transportation, waste, and domestic sectors. This study aims to inventory and project GHG emissions, develop reduction strategies, and design regulations to mitigate these emissions. The method used to inventory GHG emissions from the transportation sector is based on Tier 1 and 2 approaches, while the waste and domestic sectors use the Intergovernmental Panel on Climate Change 2006 method with Tier 1 accuracy. The results of the inventory and projection show that GHG emissions in the transportation sector will reach 455.084 Gg CO2eq by 2032. Strategies to reduce these emissions include optimizing green open spaces (RTH), rejuvenating public transportation, and developing a Bus Rapid Transit (BRT) system, which collectively are expected to reduce emissions by 1.23%. In the waste sector, projected emissions amount to 27.88 Gg CO2eq. Planned strategies, such as increasing waste service coverage to the Degayu Landfill, optimizing waste facilities, and utilizing biogas, can reduce emissions by 15.85%. In the domestic sector, projected emissions are 27.97 Gg CO2eq, with the strategy of developing community-based livestock biogas expected to reduce emissions by 0.22%
Implementing Biodrying Method for Waste Processing in Salatiga City Hardyanti, Nurandani; Zaman, Badrus; Bagaskhara, Rezza Anferditya; Hasfiawan, Harsya Giras
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 3 (2024): November 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i3.696-711

Abstract

Waste processing in Salatiga City could have been more optimal. It can be seen from the data from the Salatiga City Environment Service that the waste processing facility in the form of an active waste processing site with reduce-reuse-recycle is only one out of seven registered units. This has the potential to cause accumulation at the final processing site. Therefore, it is necessary to develop an effective waste processing facility. Planning for waste processing using the biodrying method can effectively process waste that produces products in the form of Refuse Derived Fuel (RDF)[1] [Ma2] . Planning for waste processing is carried out until 2032 in two service areas: Service area 1 (Argomulyo District and Tingkir District) and service area 2 (Sidorejo District and Sidomukti District). The amount of waste generated by service area 1 reaches 49.33 tons/day and 522.67 m3/day, while service area 2 reaches 49.62 tons/day and 414.01 m3/day. Planning for waste processing using the drying method includes picking bay units, shredding, drying, screening, and loading RDF.[3] [Ma4]  RDFs potential in 2032 as a result of waste processing in service area 1 is 11159.03 tons/year with sales of Rp. 7,270,755,009 / year and in service area 2 it is 10,471.09 tons / year with sales of Rp. 6,822,524,206 / year
Greywater Treatment Using Umbrella Sedge Plants and Activated Carbon Media with Constructed Wetland System Azhari, Nadya Aulia; Sumiyati, Sri; Zaman, Badrus; Hardyanti, Nurandani; Prayoga, Surya
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 23, No 1 (2026): March 2026
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v23i1.51-65

Abstract

Increased domestic wastewater discharge degrades river quality. This study evaluated phytoremediation using constructed wetlands with umbrella sedge plants to treat greywater prior to river discharge. Using a randomized block design, the study tested two substrates (activated carbon and quartz sand), plant quantity (0, 4, 8, or 12 clumps), and retention time (0 to 4 days) on key wastewater parameters: BOD, COD, TSS, ammonia (NH₃-N), and orthophosphate (PO₄). Data were analyzed via t-tests, ANOVA, and regression at a 5% significance level. Results indicated that a combination of activated carbon, 12 plant clumps, and a four-day retention time was the most effective in reducing TSS, BOD, COD, and phosphate, although it was less effective for ammonia. By the fourth day, all treated pollutant levels successfully met quality standards, making the water safe for river release.
Biodrying Performance and Greenhouse Gas Emissions through Hot Air Aeration in Solid Waste Conversion Badrus Zaman; Nurandani Hardyanti; Wiharyanto Oktiawan; Budi Prasetyo Samadikun; Purwono Purwono
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Article in Press 2026 (For Upcoming Issue)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v0i0.%p

Abstract

Biodrying can convert solid waste into Refuse Derived Fuel (RDF) as an alternative to fossil fuels. The conversion of solid waste to RDF with a moisture content of 10-30% generally takes 21 days. This study aims to analyze greenhouse gas emissions and biodrying performance by applying hot air aeration to accelerate solid waste conversion into RDF. Laboratory-scale investigation used a bio-drying reactor and a solid waste mixture. Hot air was produced by burning wood charcoal (X1) and mixture of wood charcoal and sawdust (X2). The research showed that hot air aeration systems are more efficient and effective at converting solid waste into RDF. Water content of solid waste reduce from 50% to 34.29% after 60 minutes at 47-80oC. N2O emissions were lower when the hot air source came from burning X1. CO2 emissions were lower when the hot air source came from burning X2. The amount of electrical power required to burn one kg of X1 and X2 is 0.0135 and 0.018 kWh, respectively.
Elektrokoagulasi Kontinu (CEC) untuk Tujuan Pembangunan Berkelanjutan Vera Cerelia Yolanda; Sudarno; Nurandani Hardyanti; Bimastyaji Surya Ramadan
Jurnal Penelitian Pendidikan IPA Vol 12 No 7 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i7.15369

Abstract

Wastewater treatment requires effective technologies for pollutant removal and sustainable water management. This study aimed to map the development of Continuous Electrocoagulation (CEC) research, identify research gaps and emerging themes, and synthesize operational and implementation issues. A Systematic Literature Network Analysis (SLNA) integrating Bibliometric Analysis (BA) and Qualitative Content Analysis (QCA) was applied to 99 Scopus-indexed journal articles published between 2019 and 2024. BA examined publication trends, collaboration networks, and research hotspots, while QCA synthesized evidence on Sustainable Development Goals (SDGs), operational factors, and implementation challenges. Publication output increased from 7 articles in 2019 to a peak of 22 in 2022, followed by 20 in 2023 and 14 in 2024. Thematic analysis indicated increasing attention to continuous operation, reactor configuration, pollutant removal, and energy efficiency. QCA showed that CEC research repeatedly examines electrode material, current density, pH, electrode distance, flow rate, electrolysis time, conductivity, temperature, supporting electrolytes, and hydraulic retention time. Key implementation challenges include electrode passivation, energy and electrode consumption, sludge management, effluent-quality control, and limited reactor standardization and scale-up evidence. Overall, CEC shows potential to support SDGs, while future research should prioritize multivariable optimization, pilot-scale validation, and sustainability assessment.
Co-Authors Adinda Putra Yuwono Adinda Ragil Saputri Amri, Salim Isfayama Anik Sarminingsih, Anik Ardhianto Gutomo Wisnupradhono Aries Susanty Azhari, Nadya Aulia Badrus Zaman Bagaskhara, Rezza Anferditya Budi Prasetyo Samadikun Damayanti, Poerborini Dea Wijayanti Endro Sutrisno Fathan Syahreza Pratama Fera Meilasari Haryono Setiyo Huboyo Hasfiawan, Harsya Giras Indah Sekar Arumdani Irawan Wisnu Wardhana Isna Maulidya Durrotunnisa Isnaini Haya Amani Larasati, Dyanung Matthew Darmawan Mochtar Hadiwidodo Muhammad Agung Wibowo Nurmeta Diana Fitri, Nurmeta Diana Prayoga, Surya Purwono Purwono Rahayu Puji Safitri Ramadan, Bimastyaji Surya Rusdianto, Danang Arip Saraswati, Lutfi Sidiq, Muhammad Fajar Silviana Sri Sumiyati Sudarno Sudarno Sudarno Suparni Setyowati Rahayu Syafrudin Syafrudin Syafrudin Syafrudin Tarisa Farrelia Febriana Tika Ayu Kusuma Wardani Titik Istirokhatun Vera Cerelia Yolanda Wiharyanto Oktiawan Winardi Dwi Nugraha Yustina Metanoia Pusparizkita ZAMAN, Badrus Zumrotus Sa'adah