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All Journal TEKNIK Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan METANA Jurnal Ilmu Lingkungan Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Journal of Engineering and Technological Sciences Jurnal Teknik Mesin Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Aplikasi Teknologi Pangan Molekul: Jurnal Ilmiah Kimia Indonesian Physical Review NEUTRON : Research from all areas of the Civil Engineering Jurnal Riset Teknologi Pencegahan Pencemaran Industri Journal Of Sustainability Perspectives Journal of Sustainability Perspectives Journal of Governance Risk Management Compliance and Sustainability
Mochamad Arief Budihardjo
Department Of Environmental Engineering, Faculty Of Engineering, Diponegoro University (UNDIP), Semarang, Central Java, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Nutrient Recovery from Agricultural Waste Water Using Electrocoagulation Process, A Case Study of Thekelan, Semarang, Indonesia Mochamad Arief Budihardjo; Sudarno Sudarno; Ika Bagus Priyambada; Amin Chegenizadeh; Purwono Purwono
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 1 (2023): March 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i1.44-52

Abstract

Eutrophication is a natural phenomenon in aquatic ecosystems that causes algae and other aquatic plants to overproduce. This process can benefit the ecology in tiny amounts, but too many nutrients can generate hazardous algal blooms and kill fish and other aquatic life. To prevent eutrophication and sustain aquatic ecosystems, agricultural waste water like microalgae production wastewater must be treated. The goal of the project is to get nitrogen and phosphorus out of the wastewater from growing microalgae, which is an agricultural waste water. One way to recover nutrients from wastewater is electrocoagulation. This procedure uses an electric current to create microscopic gas bubbles that collect and remove pollutants from wastewater. According to this study, electrocoagulation reduces phosphate and nitrate in microalgae culture wastewater. Phosphate concentration dropped by 90.20% in the 15th minute, while nitrate concentration dropped by 36.19% in the 30th minute. These reductions may be caused by struvite formation and nitrate conversion to nitrogen gas. This study demonstrates that electrocoagulation is a potential technology for recovering nutrients from agricultural waste water and reducing aquatic ecosystem eutrophication.
The Potential of Landfill Waste in Rembang City as Raw Material for Refuse Derived Fuel (RDF) Okmi Hapsari; Syafrudin Syafrudin; Mochamad Arief Budihardjo
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 1 (2023): March 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i1.219-228

Abstract

The Landoh landfillwas expired in 2022 due to the increasing amount of waste generated. The solution is to extend the service life of the landfill using the landfill mining method. The waste in the landfill is used as raw material for refuse derived fuel (RDF). The aim of the research is to find out the potential of landfill mining at Landoh landfillwhether it can be used as raw material for RDF. Primary data was taken from Landoh landfill in February 2022 with a depth of 1-2 meters and 3-4 meters from the surface of the waste generation and interviews with landfill officials. The waste samples were analyzed for waste composition, moisture content, volatile content, ash content and heating content. The waste composition is dominated by organic waste which has a large moisture content but a small caloric content. From the results of the research that the waste needs to be pre-treated (chopping and drying) for 21 days in order to fulfil the standard values of moisture content, volatile content, ash content and calorific content according to RDF raw material requirements. This method is a solution to overcoming expired landfills, reducing the volume of waste and landfill area requairements.
Desain Sistem Distribusi Air Studi Kasus di Post Admistratif Dom Aleixo Munisipal Dili Custodio Assis Correia Ximenes; M Arief Budihardjo; Anik Sariminingsih
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (602.473 KB) | DOI: 10.36418/syntax-literate.v7i4.6710

Abstract

Sistem penyediaan air bersih di Post Admistratif Dom Aleixo belum terlayani dengan baik sehingga masyarakat masih kesulitan mendapat air bersih. Untuk kebutuhan sehari-hari sebagian masyarakat masih menggunakan sumur bor dan mengangkat menggunakan pompa air.pada ,isim kemarau air sumur menjadi kering sehingga mebuat masyarakat kesulitan untuk memenuhi kebutuhan sehari-hari. Sistem penyediaan air bersih di Post Admistratif Dom Aleixo direncanakan untuk memenuhi kebutuhan hingga tahun 2030. Proyeksi jumlah penduduk pada tahun rencana dilakukan menggunakan analisis regresi untuk memprediksi jumlah kebutuhan air bersih. Hasil survey dan analisis menunjukkan bahwa jumlah pertumbuhan penduduk Post Admistratif Dom Aleixo hingga tahun rencana 2030 adalah 204918 jiwa, dengan jumlah kebutuhan air bersih sebesar 284.61liter/detik, dan kebutuhan air jam puncak sebesar 2,10 liter/detik. Dalam perencanaan ini sumber air berasal dari mata air Tohumetan dan Maloa dengan debit sesaat sebesar ± 3,47liter/detik, lebih besar dari debit kebutuhan air. Dengan demikian kebutuhan air di Post Admistratif Dom Aleixo dapat terpenuhi. Pipa transmisi dan pipa distribusi dihitung secara manual menggunakan rumus Hazen-Williams, dan didapat ukuran pipa HDPE masing-masing 3 inch. Air bersih didistribusikan ke penduduk secara gravitasi.
Inorganic Waste Reduction Planning with The Implementation of Dipo Waste Bank (DWB) and Reverse Vending Machine (RVM) at Diponegoro University Sri Sumiyati; Mochamad Arief Budihardjo; Bimastyaji Surya Ramadhan; Budi Warsito; Hanif Kusumasasmita; Ghifar Rahman; Hizkia Christian Putra Setiadi
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 3 (2023): November 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i3.765-775

Abstract

Plastic waste is a global environmental problem that has existed for a long time and has not been resolved. On a worldwide scale, solid waste increased to 9.1 billion tons, of which 6.9 billion tons was plastic waste. Undip is one of the largest public universities.  As one of the universities that supports the achievement of SDGs Number 12 concerning waste management, Diponegoro University has a Waste Bank, namely the Dipo Waste Bank (DWB). The method used in this study is mass balance. Based on the projected waste generation from 2021-2030, the era of inorganic waste in the composition of plastic bottles at Undip is  42,577 kg/day. DWB is expected to realize independent and sustainable waste management within Diponegoro University (UNDIP). In its course, waste management efforts are felt to be lacking due to several obstacles and participation that are not optimal. There are three scenarios of reducing inorganic waste of  plastic bottles in  the study, namely the  baseline scenario,  the  Dipo Waste Bank (DWB) scenario can achieve the  target  of 20% of waste that can be recovered by DWB and Reverse Vending Machine (RVM).
Bibliometric Analysis of HHO Gas Production by Electrolysis from 2013 to 2023 Purwono Purwono; H Hadiyanto; Mochamad Arief Budihardjo; Annisa Sila Puspita
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 3 (2023): November 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i3.704-712

Abstract

HHO gas is one promising alternative as an alternative for fossil fuels, nevertheless, several challenges need to be overcome in order for HHO gas to become a viable option for global use. This paper presentsbibliometric analysis, HHO gases production methods, and challenges of using HHO gas. The primary objective of this review paper is to provide views, assessments, and evaluations of the published literature on HHO gas, both the production and use challenges of HHO gas. This review article uses several software programs including origin for graph visualization, Microsoft excel for processing data, and VOSviewer for analyzing bibliographic mappings. HHO production can be done by adding KOH electrolyte solution. Factors that affect the production of HHO gas include electrolyte properties, electrolyte concentration, and distance between electrodes. An increase in the concentration of the electrolysis solution leads to an increase in the production of HHO gas. The production of HHO gas can also be done with the addition of Na2CO3 or K2CO3 which can produce high H2 gas. The pre-combustion mercury removal technique using coal electrolysis produces hydrogen byproducts with 50% less energy than water electrolysis. A single Pt circuit at TiO2 support (Pt1/def-TiO2) forms a highly efficient photocatalyst for hydrogen production. The main challenges of HHO gas in terms of production, storage, distribution, safety, cost of HHO gas production.
Water Quality Measurements with TSS, TDS, Total Phosphate, Nitrate, Total Coliform Parameters in the Garang Water Shed Syafrudin Syafrudin; Anik Sarminingsih; Henny Juliani; Mochamad Arief Budihardjo; Annisa Sila Puspita; Ikviy Ya’azzan Nabila
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 3 (2023): November 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i3.776-790

Abstract

Massive industrial and urban development can cause changes in the quality of river water, one of which is the Garang Watershed, located in Central Java Province. This river is situated in Kendal Regency (upper and middle) and Semarang City (middle and lower). This research examined the Garang River's water quality conditions, divided into four sub-basins: Garang Hilir, Garang Hulu, Kreo and Kripik. The parameter assessed in this research is TSS, TDS, Total Phosphate, Nitrate, and Total Coliform Parameters with a total of ten sampling location points were determined based on several criteria using GPS and the SNI 6989.57:2008 sampling method. TSS and TDS concentrations in March-April were observed to be high, especially at sampling point 10. In contrast, total phosphate concentrations were elevated at sampling points 2, 3, and 9; Nitrate values were observed to be high at sampling point 3 in March and sampling point 5 in April; Total coliforms were high at sampling points 1, 3, and 4, all of these is possibly due to domestic waste and the use of fertilizer by agricultural activities. This sampling quality assessment shows a close relationship between human activities and agricultural activities in river water quality, especially in the Garang River.
Experimental Investigation of by-Product Hydrogen Gas in the Harvesting Process of Dunaliella salina using a Non-Sacrificial Cathode Purwono Purwono; Hadiyanto Hadiyanto; Marcelinus Christwardana; Widayat Widayat; Mochamad Arief Budihardjo
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 1 (2024): March 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i1.80-89

Abstract

Hydrogen gas is considered a pollution-free fuel in the future. However, the EC process using these non-sacrificial electrodes requires further research especially for the production of dissolved hydrogen gas and the efficiency of microalgae harvesting. The purpose of this study was to investigate the concentration of dissolved hydrogen gas produced from the harvesting process of Dunaliella salina microalgae species using EC and ORP concentrations including pH, harvesting efficiency due to voltage variations and harvesting time using EC with non-sacrificial electrodes. D salina harvesting using EC reactor made of cylindrical borosilicate glass. Spiral-shaped type 304 stainless steel (non-sacrificial) serves as the cathode and solid cylindrically-shaped Fe serves as the anode. The voltage set varies between 16, 18, and 20 Volts, while the electrolysis time is varied between 1.3.5 minutes. The results showed that the highest dissolved hydrogen concentration of 820 ppb (0.820 ppm) produced from the EC process used 18 V for 3 minutes. The volume of gas could not be measured because most of the hydrogen gas was dissolved in the D salina culture, so it was not enough to evaporate within 3 minutes. The maximum ORP concentration of -413 mV resulting from the EC process uses 18 V for 3 minutes. When hydrogen gas is present in a solution, it can decrease the ORP value of the solution. At EC time with non-sacrificial electrodes for 5 minutes managed to harvest D salina 50.79%; 61.90%; 74.60% at voltages of 16 V, 18V, and 20 V respectively. 
Life Cycle Assessment to Compare the Environmental of Food Waste Management System in Semarang City Syahrul Al Qadar; Mochamad Arief Budihardjo; Ika Bagus Priyambada
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 1 (2024): March 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i1.154-164

Abstract

1.3 billion tons of the food produced for human consumption is wasted in the food supply chain as a result of a number of issues. A high proportion of food waste occurs during consumption, primarily influenced by consumer behavior. In Semarang City, Black Soldier Fly, incineration, and composting are alternatives to food waste management. This research aims to analyze alternative food waste management methods that yield reusable resources and materials because currently unknown which method has the smallest environmental impact. Life Cycle Assessment method can be used to examine the environmental impact of the food waste management system from every phase 1 ton food waste analyze. BSF has proven superior to composting, incineration and landfilling methods in analyzes of potential environmental impacts that reduce 90% environmental impact. Landfills cover a large area and the effect of global warming is significant until of 1.704E+03 CO2-eq, this issue needs more attention in the management of the generated CH4. Incineration needs to make advances in the method such as producing new resources and emissions so that can be reused because incineration impact eutrophication potential until 2.438E+00 . For reasons environmental concerns, efficient food waste management is crucial to realizing the Sustainable Development Goals.
Analysis of the Application of Mangrove Rehabilitation Structures on Mangrove Growth and Calculation of Carbon Stocks in the Coastal Area of Demak, Indonesia Elinna Putri Handayani; Mochamad Arief Budihardjo; Denny Nugroho Sugianto
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 1 (2024): March 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i1.165-173

Abstract

Mangroves participate in controlling climate change by acting as the lungs of the world through the absorption and storage of blue carbon. The high-standing water on the land that must be rehabilitated is one of the obstacles encountered, so a special strategy is needed, namely, implementing a mangrove rehabilitation media structure using the demplot mangrove method. This study aimed to analyze mangrove growth based on the application of mangrove rehabilitation media structures and to calculate potential carbon stocks based on the value of tree biomass from mangrove rehabilitation monitoring. In this study, tree height and diameter were measured and linked to the water quality and frequency of inundation. Mangrove carbon reserves were also calculated based on biomass values. Good growth in the height and diameter of mangroves occurred in Avicennia lanata stands with an inundation frequency of 6 h/day. The largest projection of potential carbon stocks from the results of monitoring mangrove rehabilitation was also stored in Avicennia lanata mangrove stands at 0.3467 kg/tree (60 months), 0.6287 kg/tree (120 months), and 0.9107 kg/tree (180 months).
Spatial Modeling for River Quality Assessment to Enhance Sustainable Water Resource Management Regulations Syafrudin, Syafrudin; Sarminingsih, Anik; Juliani, Henny; Sejati, Anang Wahyu; Budihardjo, Mochamad Arief; Sani, Muhammad Thariq; Wati, Hessy Rahma; A'yun, Husnul Karimah Qurrata
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 1 (2025): March 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i1.183-195

Abstract

Water is a crucial asset and serves as a significant factor in the quality of life, especially in supporting key sectors such as agriculture, energy, industry and conservation of natural ecosystems. Water quality can be significantly affected by pollution from effluents, especially in developing countries such as Indonesia which faces the added challenge of rapid population growth. This research focuses on monitoring water quality in the Garang River Sub-region, Semarang, by utilizing Internet of Things (IoT) technology for real-time monitoring. The methods used include the Storm Water Management Model (SWMM) model and an IoT-based monitoring system to measure important parameters such as temperature, pH, turbidity, Dissolved Oxygen (DO), Chemical Oxygen Demand (COD), and nitrate and phosphate concentrations. The results showed that the Chemical Oxygen Demand (COD) parameter often exceeded quality standards, especially in areas with domestic and industrial activities. The IoT monitoring system facilitates precise and instantaneous data gathering., supporting sustainable water resources management. This research emphasizes the need for evaluation and adjustment of policies related to waste management and spatial planning to reduce pollution and improve water quality.
Co-Authors . Widayat A'yun, Husnul Karimah Qurrata Adranandini Noor Anisa Aen Hendrawati Agung Budiarto Agus Jatnika Effendi Ainun Nurusy Syahida Al-Baarri, Ahmad Ni'matullah Ambariyanto , Ambariyanto Ambariyanto Amin Chegenizadeh Ammar, Marah Anik Sariminingsih Anik Sarminingsih, Anik Annisa Sila Puspita Annisa Sila Puspita Armas Arifin Arbunowo Armas Arifin Arbunowo Arumdani, Indah Sekar Aufa Rahma Al-Hafidz Badrus Zaman Baskoro Lokahita Bimastyaji Surya Ramadan Bimastyaji Surya Ramadhan Budi Warsito Cahyo Harsanto, Cahyo Candra Purnawan Christina Candra Dewi Custodio Assis Correia Ximenes Denny Nugroho Sugianto Elinna Putri Handayani Fadhillah, Muhammad Afdhal Fauziyah, Fita Fuad Muhammad Ganjar Samudro Ghifar Rahman H Hadiyanto Haekal Awliya Muhammad Salman Hanif Kusumasasmita Hanun, Alain Shofia Haryono Setiyo Huboyo Henny Juliani Henny Juliani, Henny Hizkia Christian Putra Setiadi Ika Bagus Priyambada Ikviy Ya’azzan Nabila Indah Sekar Arumdani Irawan Wisnu Wardhana Irawan Wisnu Wardhana Isaaf Fadhilah Kasiyati Kasiati Ketut Karno Kismartini Kismartini Marcelinus Christwardana Mochtar Hadiwidodo Natasya Ghinna Humaira Nurandani Hardyanti Nurul Yaqin Okmi Hapsari P Purwanto Pertiwi Andarani Purwono Purwono Purwono Purwono Puspita, Annisa Sila Putri Alifa Kholil Ramadan, Bimastyaji Surya Ramadhan, Muhammad Hisyam Ramadhan Rifqi Ahmad Baihaqi Rizal Adi Wirawan Rizki Tri Andrianingsih Sandra Anggita Sari Sani, Muhammad Thariq Sejati, Anang Wahyu Setia Budi Sasongko Sri Sumiyati Sudarno Sudarno Sudharto Prawata Hadi Syafrudin Syafrudin Syafrudin Syafrudin Syafrudin syafrudin Syahrul Al Qadar Syarif Hidayat Thomas Triadi Putranto, Thomas Triadi Uus Uswatun Hasanah Wahyudi, Rochmad Wati, Hessy Rahma Widayat Widayat Widi Widayat Winardi Dwi Nugraha Yoyon Wahyono ZAMAN, Badrus Zeferino Soares Lopes