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All Journal TEKNIK Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan METANA Jurnal Ilmu Lingkungan 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

Mochamad Arief Budihardjo

Department Of Environmental Engineering, Faculty Of Engineering, Diponegoro University (UNDIP), Semarang, Central Java, Indonesia

Author-ID : 244204

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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STUDI POTENSI EKONOMI PEMANFAATAN LIMBAH INDUSTRI TEKSTIL PRINTING SEBAGAI BAHAN BAKAR ALTERNATIF (STUDI KASUS: PT. SEKAR BENGAWAN, KARANGANYAR) Badrus Zaman; M. Arief Budihardjo
METANA Vol 4, No 1 (2007): Juni 2007
Publisher : Universitas Diponegoro

Abstract PT. Sekar Bengawan in Karanganyar Regency. Central Java is a printing textile industry which produces 1,25 m3 of kerosene waste per day. Based on technical test, the characteristic of the kerosene waste are as follows, 42,772 MJ/kg of calorific value, 0, 08359 mg/m3 of SO2 emision, and 0,13518 mg/m3 of NO2 emision. The kerosene waste can be used as fuel with the ratio of time length, volume of soot, and weight of soot is 1,72 ; 1,6 ; and 3,1 times bigger than kerosene. Based on exposure assesment of SO2 and of NO2, Hazard index value for adult woman is 0,412; adult man is 0,272 ; child 6-12 years is 0,27;. and child 2-6 years is 0.2725. With hazard index less than one, so kerosene waste will not generate health impact. Based on these data, kerosene waste can be reused and resold to the market. The target market segments are households and street vendors. Kerosene waste which is priced Rp ll75/liters will generate Rp.22.643.437,5 per month of profit compared with Rp.50.625.000 per month of cost if it is treated an hazardous waste treatment. Key word : Waste kerosene, Hazard Index, Reuse, Economic potency

Forecasting Greenhouse Gas Emissions from Heavy Vehicles: A Case study of Semarang City Mochamad Arief Budihardjo; Isaaf Fadhilah; Natasya Ghinna Humaira; Mochtar Hadiwidodo; Irawan Wisnu Wardhana; Bimastyaji Surya Ramadan
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 18, No 2 (2021): July 2021
Publisher : Universitas Diponegoro

In Indonesia, transportation sector, specifically road transport consumed most energy compared to other sectors. Eventually, the energy consumption will increase due to the growth of vehicle number that also escalate emission. Vehicle emissions had been recognized as a significant contributor to atmospheric greenhouse gas (GHG) pollution. Heavy-duty vehicles are considered as main sources of vehicular emissions in most cities. Therefore, it is crucial to take into account heavy-duty vehicle emission projections in order to support policymakers to identify vehicle emissions and develop pollution control strategies. The aim of this study is to forecast heavy-duty vehicle population, vehicle kilometers travelled (VKT), fuel consumption, and heavy-duty vehicle emissions using data of Semarang City to illustrate greenhouse gas emission of big cities in Indonesia. Business as Usual (BAU) and The Intergovernmental Panel on Climate Change (IPCC) method were incorporated to determine vehicle emission projection. Heavy-duty vehicle emissions increase from 2021 to 2030 by 12.317 to 22.865 Gg CO2/year with amount trucks and buses emissions of 21.981,5 Gg CO2/year and 884,2 Gg CO2/year, respectively.

Hazardous Solid Waste Management in Universitas Diponegoro: Planning Towards Environmental Sustainability Sri Sumiyati; Bimastyaji Surya Ramadan; Mochamad Arief Budihardjo; Aufa Rahma Al-Hafidz; Haekal Awliya Muhammad Salman; Rizal Adi Wirawan
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 1 (2022): March 2022
Publisher : Universitas Diponegoro

Universitas Diponegoro has a role in contributing to considerable numbers of hazardous solid waste from academic activities as it is the largest university in Central Java Province, Indonesia. Therefore, improper hazardous solid waste will cause potential disease for humans and pollute the environment. For this reason, proper hazardous solid waste management is urgently needed. This research aims to design hazardous solid waste management for Universitas Diponegoro as a pilot testing study. The research used questionnaires, surveys, in-depth interviews, and observations to construct an appropriate hazardous waste management system. The result showed that hazardous solid waste in Universitas Diponegoro came from 5 sources: education, office, laboratory, supporting facilities, and Pleburan Campus. The estimation of hazardous solid waste produced by the Universitas Diponegoro in 2021 is as much as 100.4 kg/day. The hazardous waste characteristics are toxic, corrosive, flammable, and infectious. In the hazardous management planning that was developed, the design of the waste transportation and storage system at the waste station in the Tembalang and Pleburan campuses has a total investment and operation cost of Rp 6,259,841,999 for 10 years of operation. This design is hoped to enhance the campus's achievement in sustainability efforts.

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

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

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

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 Â± 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

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

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

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

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.

Co-Authors . Widayat A'yun, Husnul Karimah Qurrata Adranandini Noor Anisa Agus Jatnika Effendi Ainun Nurusy Syahida Al-Baarri, Ahmad Ni'matullah Ambariyanto , Amin Chegenizadeh Anggreni, Dewi Anik Sariminingsih Anik Sarminingsih, Anik Annisa Sila Puspita Armas Arifin Arbunowo Armas Arifin Arbunowo Arumdani, Indah Sekar Aufa Rahma Al-Hafidz Baskoro Lokahita 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 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 Irawan Wisnu Wardhana Irawan Wisnu Wardhana Isaaf Fadhilah Kasiyati Kasiati Ketut Karno Marcelinus Christwardana Mochtar Hadiwidodo Nasrullah Nasrullah, Natasya Ghinna Humaira 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 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 Wati, Hessy Rahma Widayat Widayat Winardi Dwi Nugraha Yoyon Wahyono ZAMAN, Badrus Zeferino Soares Lopes

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