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Pengaruh Variasi Debit dan Jumlah Elektroda Terhadap Penurunan COD dan Produksi Listrik Dalam Reaktor Microbial Fuel Cells (MFCs) Studi Kasus: Air Limbah Rumah Potong Hewan (RPH) Kota Salatiga Septyana, Ian; Ardhianto Ganjar Samudro, Rachmad
DIPOIPTEKS: Jurnal Ilmiah Mahasiswa Undip DIPOIPTEKS Vol. 1, No. 1 (2013)
Publisher : DIPOIPTEKS: Jurnal Ilmiah Mahasiswa Undip

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (919.134 KB)

This research is a wastewater treatment miniature using microbial fuel cells (MFCs) reactor. The purpose of this study to find the optimum flowrate and total electrode to decrease concentration of COD and electricity production in microbial fuel cells (MFCs) reactor can optimum too. The best reactor of this research is reactor 1 where using flowrate 0,1 l/h and total electrode 3. In reactor 1 show that effluent concentration is 56,67 mg/l while for electricity production is 550 mV.Keywords: Microbial fuel cells, flowrate, total electrode, COD, electricity production

Pengaruh Variasi Debit dan Jumlah Elektroda Terhadap Penurunan COD dan Produksi Listrik Dalam Reaktor Microbial Fuel Cells (MFCs) Studi Kasus: Air Limbah Rumah Potong Hewan (RPH) Kota Salatiga Ian Septyana; Rachmad Ardhianto Ganjar Samudro
DIPOIPTEKS: Jurnal Ilmiah Mahasiswa Undip DIPOIPTEKS Vol. 1, No. 1 (2013)
Publisher : DIPOIPTEKS: Jurnal Ilmiah Mahasiswa Undip

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (919.134 KB)

This research is a wastewater treatment miniature using microbial fuel cells (MFCs) reactor. The purpose of this study to find the optimum flowrate and total electrode to decrease concentration of COD and electricity production in microbial fuel cells (MFCs) reactor can optimum too. The best reactor of this research is reactor 1 where using flowrate 0,1 l/h and total electrode 3. In reactor 1 show that effluent concentration is 56,67 mg/l while for electricity production is 550 mV.Keywords: Microbial fuel cells, flowrate, total electrode, COD, electricity production

Sistem Pengolahan Air Limbah Hybrid (Koagulasi, Moving Bed Biofilm Reactor, Elektrokoagulasi dan Ultrafiltrasi) dalam Pemenuhan Baku Mutu Air Limbah Industri Farmasi Berbasis Non-Beta-Laktamase Ardhianto, Rachmad; Hadiyanto, H; Hemawan, Ferry
Jurnal Profesi Insinyur Indonesia Vol 2, No 6 (2024): JPII:
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpii.2024.25119

Air limbah farmasi merupakan salah satu air limbah yang masuk dalam kategori pharmaceuticals and personal care products (PPCPs). Air limbah yang dihasilkan merupakan dari aktivitas proses produksi pembuatan obat. Satu aspek penting dalam penentuan proses pengolahan air limbah farmasi adalah menentukan proses pengolahan yang didasari dari nilai BOD/COD. Nilai BOD/COD air limbah farmasi mempunyai nilai <0.3 sehingga diperlukan suatu proses pre-treatment. Dalam studi ini sistem pengolahan hybrid (koagulasi, MBBR, EC dan ultrafiltrasi) digunakan sebagai proses pengolahan air limbah dengan target baku mutu Peraturan Gubernur Nomor 69 Tahun 2013. Proses pre-treatment dalam sistem ini dibagi menjadi dua fungsi, yaitu fungsi pre-treatment untuk proses biologis dan pre-treatment untuk proses ultrafiltrasi. Efisiensi dari sistem hybrid ini adalah sebesar 96,85% TSS, 97,49% COD, 97,53% BOD, 89,63% nitrogen dan 92,83% feenol. Hasil aplikasi teknologi hybrid ini menghasilkan hasil keluaran pengolahan yang sesuai baku mutu yang distandarkan. Kata kunci: hybrid sistem, pre-treatment, koagulasi, MBBR, elektrokoagulasi, ultrafiltrasi

The Efficacy of Anaerobic Biofilter and Pre-Aeration with Microbubble Generator for Tofu Wastewater Treatment Harahap, Juliansyah; Ardhianto, Rachmad; Muliadita, Tiara Sekar; Mahdariza, Fathul; Ersa, Nanda Savira; Ashari, Teuku Muhammad
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.v22i1.95-108

The majority of tofu manufacturers lack the necessary infrastructure to treat wastewater, resulting in the direct discharge of wastewater into water bodies. Such practices have the potential to results in environmental pollution. This study examines the efficacy of combining anaerobic biofilter technology and pre-aeration with a microbubble generator for the treatment of wastewater generated by the tofu industry. The research focused on the impact of hydraulic retention time (HRT) on the reduction of pollutants, specifically chemical oxygen demand (COD), biological oxygen demand (BOD), total suspended solids (TSS), and pH levels. The results indicated that prolonged HRT in the anaerobic biofilter significantly reduces pollutant concentrations. 48-hour HRT achieved reductions of 80.78% for COD, 78.53% for BOD, and 89.25% for TSS, respectively. The integration of a microbubble generator further enhanced treatment efficiency. The combination of a 48-hour anaerobic biofilter and a 180-minute microbubble generator achieved reductions of 93.82% for COD, 93.11% for BOD, and 97.5% for TSS. The effluent consistently met the pH quality standards set by the Indonesian government. The findings suggest the potential for optimizing retention times and combining anaerobic and aerobic treatments to address wastewater challenges in the tofu industry.

PERFORMANCE EVALUATION OF SEWAGE TREATMENT PLANT USING BIOCHIP MEDIA IN MBBR TECHNOLOGY : CASE STUDY “X GARMENT, CENTRAL JAVA Yusrina, Afifah; Ardhianto, Rachmad; Darojat, Khumaidah; Rahman, Arief
Lingkar: Journal of Environmental Engineering Vol. 5 No. 2 (2024): LINGKAR : Journal of Environmental Engineering
Publisher : Department of Environmental Engineering (Prodi Teknik Lingkungan), Fakultas Sains dan Teknologi, UIN Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ljee.v5i2.5583

“X” garment industry’s Sewage Treatment Plant (STP) was built to treat domestic wastewater with an inflow capacity of 500 m3/day. The main principle of the STP technology is an attached growth process with Moving Bed Biofilm Reactor (MBBR) technology using biochip media. Wastewater treated at the STP must meet the water quality standards of Ministry of Environment and Forestry Regulation 68 of 2016 before being discharged into water bodies. Therefore, this research aimed to evaluate the “X” garment industry’s STP performance. Wastewater sampling was carried out at the inlet and outlet of STP. Water quality parameters analyzed included pH, BOD, COD, TSS, oil and grease, ammonia, and total coliforms. The removal efficiency value is obtained from the calculation of sampling results. The analysis showed that all treated water parameters met the water quality standards throughout the research period. Hence, the average removal efficiency value at the STP for each parameter was above 90%.

Pemanfaatan Campuran Sludge Electrocoagulasi dan Fly Ash pada Sifat Karakteristik Paving Block Rokhman, Abdul; Ardianto, Rachmad; Putri, Desi; Adinda, Najla
RekaRacana: Jurnal Teknik Sipil Vol 11, No 1: Maret 2025
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v11i1.99

ABSTRAKPenelitian ini mencoba memanfaatkan campuran limbah fly ash dan SEC (Electrocoagulation of Sludge) menjadi material yang berguna untuk digunakan sebagai bahan penyusun paving block. Selama ini, limbah SEC dari pabrik tekstil hanya dikumpulkan sebagai bahan yang tidak berguna, sehingga memanfaatkan penggunaan material limbah ini menjadi lebih penting dalam rangka pengurangan limbah padat pada lingkungan sekitar. Untuk meningkatkan kuat tekan paving block, campuran fly ash, yang merupakan bahan limbah industri yang tidak dimanfaatkan. Komposisi campuran fly ash pada nilai 20% sedang komposisi variasi SEC sebesar 0%, 5%, 10%, 15%, 20%, dan 25%. Pada masing-masing kondisi dibuat 9 benda uji dengan pembagian masing-masing 3 benda uji untuk pengujian 7 hari, 28 hari dan 56 hari. Hasil penelitian menunjukkan bahwa penambahan konsentrasi SEC makin tinggi akan mengurangi kuat tekan dan mutu paving block. Namun untuk variasi limbah SEC sebesar 5% masih dapat digunakan untuk campuran dengan target mutu pavingblock B. Penurunan nilai kuat tekan dikarenakan adanya pengaruh unsur karbon (C) dalam limbah SEC. Secara visual, Benda uji dengan kandungan SEC tinggi akan terlihat basah, dan mengalami proses pengeringan yang lama, hal ini dikarenakan SEC memiliki sifat menangkap air, dan sulit menguapkan air.Kata kunci: sludge, limbah tekstil, elektrokoagulasi, fly ash, pavingblock ABSTRACTThis research tries to utilize a mixture of fly ash waste and SEC (Electrocoagulation of Sludge) into a useful material to be used as a paving block material. So far, SEC waste from textile factories has only been collected as useless material, so making use of this waste material has become more important in order to reduce solid waste in the surrounding environment. To increase the compressive strength of paving blocks, mix fly ash, which is an unused industrial waste material. The composition of the fly ash mixture is 20%, while the SEC variation composition is 0%, 5%, 10%, 15%, 20% and 25%. In each condition, 9 test objects were made, divided into 3 test objects each for 7 days, 28 days and 56 days testing. The research results show that adding a higher SEC concentration will reduce the compressive strength and quality of the paving block. However, a 5% variation in SEC waste can still be used for a mixture with a paving block quality target of B. The decrease in compressive strength is due to the influence of the carbon element (C) in SEC waste. Visually, test objects with a high SEC content will appear wet, and undergo a long drying process, this is because SEC has the property of capturing water, and is difficult to evaporate water.Keywords: sludge, textile waste, electrocoagulation, fly ash, paving block

Pengaruh Proses Biodrying dalam Pemanfaatan Biomasa menjadi Solid Recovery Fuel (SRF) Darojat, Khumaidah; Yusrina, Afifah; Ardhianto, Rachmad; Hendri
Al-Ard: Jurnal Teknik Lingkungan Vol. 10 No. 1 (2024): September
Publisher : Department of Environmental engineering, Faculty of Science and Technology, Islamic State University Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/alard.v10i1.2187

In developing countries, municipal solid waste remains a major unresolved problem. One way to manage municipal solid waste is to produce biomass. Biomass management from solid waste involves a natural or mechanically assisted biological drying process using bulking agents. This study employed natural and mechanical biodrying systems with blower assistance and corn starch industrial wastewater bulking agents. A blower expedites the process of reducing waste weight. The reactor with the blower exhibited the largest decrease in water content under the bulking agent addition conditions when the water content fell below 15%. Using a blower in the biodrying process reduces the drying time of biomass raw material by 50% compared to the non-blower method, which takes up to 12 days. 1 L of the bulking agent is the most effective biodrying dose. The percentage carbon value in the biodrying process was 42.02% higher when a bulking agent was used than a non-bulking agent (35.98%) and a blower was not used (40.82%). Including a bulking agent during biodrying enhances the composition's elemental value and speeds up the reduction and evaporation or drying of waste.

The Impact of Coagulant Type and Dosage on Turbidity and pH Levels in Raw Water Treatment: A Comparative Study Using The Jar Test Method and Full-Scale Water Treatment Plant Wijaya, Budi; Sudarno, Sudarno; Samudro, Ganjar; Ardhianto, Rachmad
Elkawnie Vol. 11 No. 2 (2025)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v11i2.30001

Abstract: The Gajah Mungkur Multipurpose Dam in Wonogiri functions as a source of raw surface water for the surrounding area. This water often contains suspended particles and colloidal substances due to natural processes such as soil erosion, plant decomposition, and microbial activity. This study evaluated three coagulants: Hincolac, PAC 280 Ac, and PAC 250 Ac, at dosages of 60, 70, 80, 90, and 100 ppm. The results of the jar test were compared with those of the full-scale water treatment plant operational test. The findings revealed that the Hincolac coagulant demonstrated superior performance, achieving an efficiency level of 98.60%, which exceeded that of the PAC 250 A and 280 AC coagulants. Hincolac coagulant reached optimal effectiveness at a concentration of 80 ppm, whereas PAC 280 AC and 250 coagulants achieved their highest efficiency at 100 ppm, resulting in turbidity reductions of 98.1% and 97.92%, respectively. Statistical analysis showed that all coagulant types significantly affected turbidity, pH, and floc size (p < 0.001). In a comprehensive application, a dosage of Hincolac 67 ± 7.7 ppm was comparable to the tube test method and effectively achieved a 99% reduction in turbidity in the water-treatment output. Elevated alkalinity and Al₂O₃ concentrations significantly influence the effectiveness of coagulant-based water treatment. Abstrak: Bendungan Serbaguna Gajah Mungkur di Wonogiri berfungsi sebagai sumber air baku berbasis air permukaan. Air permukaan sering kali mengandung partikel tersuspensi dan bahan koloid yang dihasilkan dari kejadian alami, seperti erosi tanah, pembusukan tanaman, dan aktivitas mikroba. Studi ini melibatkan tiga jenis koagulan, yaitu Hincolac, PAC 280 Ac, dan PAC 250 Ac, dan menggunakan metode dosis variabel, 60, 70, 80, 90, dan 100 (ppm). Hasil uji jar test dibandingkan dengan hasil uji operasional wtp kapasitas penuh. Hasil studi menunjukkan bahwa koagulan Hincolac menunjukkan kinerja yang lebih baik, mencapai tingkat efisiensi yang tinggi sebesar 98,60% lebih baik dari pada koagulan jenis PAC 250 A dan 280 AC. Koagulan Hincolac mencapai efisiensi tertinggi pada konsentrasi 80 ppm, dibandingkan dengan koagulan PAC 280 AC dan 250 yang dicapai pada konsentrasi 100 ppm, menghasilkan pengurangan kekeruhan 98,1% dan 97,92%. Analisis statistik menunjukkan bahwa semua jenis koagulan memiliki dampak yang signifikan terhadap kekeruhan, pH, dan ukuran flok, dengan nilai p <0,001. Dalam aplikasi skala penuh, dosis Hincolac 67 ± 7,7 ppm sebanding dengan metode uji tabung, dan berhasil mencapai pengurangan kekeruhan 99% pada output pengolahan air. Tingkat kebasaan dan konsentrasi Al2O3 yang tinggi memiliki dampak yang signifikan terhadap hasil akhir pengolahan air berbasis koagulan.

The Effect of Adding B40 Blended Fuel and Used Motor Oil on Increasing the Calorific Value of RDF Biomass Octavia, Ramadhini; Oktavieandri , Nashwa; Marpaung , Evita Grace Michele; Aqila , Digna Sabrina; Ardhianto, Rachmad
Al-Ard: Jurnal Teknik Lingkungan Vol. 12 No. 1 (2026): September
Publisher : Department of Environmental engineering, Faculty of Science and Technology, Islamic State University Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/alard.v12i1.2547

The energy crisis and the rise in waste production have prompted the adoption of organic biomass waste, plastic waste, B40 biodiesel fuel (comprising 40% biodiesel and 60% diesel), and used oil as alternative solid fuels. This research sought to enhance the integration of additives and waste oil into different blends of organic biomass and plastic, with a focus on the calorific value, moisture content, and ash content of fuel pellets. The biomass used consisted of materials sourced from wood branches and dry leaves, while polyethylene (PE) served as the plastic component. The mixture variations included 100% biomass, 90% biomass with 10% plastic, and 80% biomass with 20% plastic, with B40 added in concentrations from 200 to 400 ppm and volumes between 50 and 300 mL/kg of the mixture. The pellet production process involved drying, shredding, mixing, compacting, and testing the final product according to specified parameters. Results showed that incorporating plastic and a small amount of additives decreased moisture and ash content while increasing the calorific value. The optimal blend was determined to be 80% biomass and 20% plastic, which achieved the highest calorific value of 5568 kcal/kg and optimal combustion quality. The use of biomass, plastic, and used oil waste as sustainable alternative fuels is highly recommended to promote environmentally friendly waste and energy management.

Identification of Waste Disposal Sites Using the Greenhouse Gas and Vegetation Index Method: A Case Study of Jakarta Province Ramlah, Ramlah; Zuriatni, Yulisya; Puspo, Tiara Ramadhanti; Arkan, M. Ghoza; Ardhianto, Rachmad
Elkawnie Vol. 12 No. 2 (2026): Article In Press
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v12.i2.34382

Abstract: Waste dumps pose a significant environmental challenge in urban areas, such as Jakarta. Remote sensing provides an efficient and cost-effective approach for identifying waste accumulation sites. This study aimed to identify waste dump sites using open-source remote sensing data by integrating greenhouse gas indicators and vegetation indices. The Landsat 8, Sentinel-2, Sentinel-3, OCO-2 GEOS Level 3, and Sentinel-5P TROPOMI data were utilised to derive the Normalised Difference Vegetation Index (NDVI), Land Surface Temperature (LST), methane (CH4), and carbon dioxide (CO2). The Bantar Gebang Final Disposal Site was selected as the study area. The vegetation in this area was classified as class 5, indicating minimal vegetation presence. The deterioration in vegetation health is attributed to leachate infiltration into the soil and groundwater, subsequently absorbed by plants. Concurrently, the temperature ranges from a minimum of 43°C to a maximum of 63°C, exceeding that of the surrounding regions. The waste decomposition process is responsible for the elevated LST at the site. Methane (CH4) and carbon dioxide (CO2) concentration measurements revealed methane levels at 1,948 ppb and carbon dioxide levels between 413.617 ppm and 415.96 ppm. The rise in CO2 levels is associated with a decline in vegetation index values, which impairs photosynthesis. These values are influenced by meteorological conditions. Verification was conducted using high-resolution aerial photographs to provide a real-color visualisation of field conditions. Further research is necessary to accurately identify waste accumulation points at various scales or sizes. Abstrak: Tumpukan sampah merupakan salah satu tantangan lingkungan yang dihadapi pada wilayah perkotaan seperti Jakarta. Identifikasi tumpukan sampah dapat dilakukan dengan menggunakan pendekatan penginderaan jauh. Hal ini dikarenakan pendekatan ini lebih efisien karena lebih murah. Penelitian ini bertujuan mengidentifikasi tumpukan sampah dengan mengintegrasikan indikator gas rumah kaca dan indeks vegetasi. Penelitian ini menggunakan data Landsat 8, Sentinel-2, Sentinel-3, OCO-2 GEOS Level 3, dan Sentinel-5P TROPOMI untuk menghasilkan Normalized Difference Vegetation Index (NDVI), Land Surface Temperature (LST), metana (CH₄), dan karbon dioksida (CO₂). Fokus lokasi penelitian ini adalah tempat pembuangan sampah Bantar Gebang sebagai lokasi akumulasi sampah di Jakarta. Kondisi vegetasi pada area tersebut berada pada kelas 5 (lima) dengan kriteria very little vegetation. Penurunan kesehatan vegetasi dipicu oleh air lindih yang meresap ke dalam tanah dan air tanah yang kemudian diserap oleh tanaman. Sementara temperaturenya adalah minimal 43°C dan maksimal 63°C, lebih tinggi dibandingkan dengan area sekitarnya. Proses dekomposisi pada sampah menjadi penyebab peningkatan LST pada lokasi penelitian. Hasil pengukuran konsentrasi metana (CH4) dan karbon dioksida (CO2) diperoleh nilai konsentrasi metana sebesar 1.948 ppb dan karbon dioksida sebesar 413,617 ppm – 415,96 ppm. Peningkatan nilai CO2 berkaitan dengan penurunan nilai indeks vegetasi yang menurunkan proses fotosintesis. Nilai-nilai tersebut dikontrol oleh kondisi meteorologi. Verifikasi dilakukan dengan menggunakan foto udara resolusi tinggi untuk menunjukkan visualisasi warna nyata kondisi lapangan. Penelitian ini masih perlu dikembangkan lebih lanjut untuk dapat menentukan titik-titik tumpukan sampah secara presisi pada berbagai skala atau luasan tumpukan sampah.

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