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All Journal Jurnal Bahan Alam Terbarukan Jurnal Ilmiah Arena Tekstil IJEMS (Indonesian Journal of Environmental Management and Sustainability) Journal of Environmental Science and Sustainable Development Makara Journal of Technology
Suprihanto Notodarmojo
Program Studi Teknik Lingkungan, Institut Teknologi Bandung Jalan Ganesa 10, Bandung 40132
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health

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ADSORPSI ZAT WARNA TEKSTIL REACTIVE RED 141 PADA TANAH LIAT LOKAL ALAMI Zahra, Nurulbaiti Listyendah; Sugiyana, Doni; Notodarmojo, Suprihanto
Arena Tekstil Vol 29, No 2 (2014)
Publisher : Arena Tekstil

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Abstract

Dalam studi ini dipelajari kemampuan adsorpsi tanah liat lokal alami untuk menyisihkan warna pada larutan mengandung zat warna tekstil Reactive Red 141 (RR 141). Tanah liat lokal alami yang diteliti sebagai alternatif adsorben yang murah dalam studi ini berasal dari daerah Arcamanik, Citatah dan Dago (Bandung, Indonesia). Aspek yang dipelajari meliputi pengaruh dosis adsorben, waktu kontak dan konsentrasi awal larutan zat warna. Mekanisme proses adsorpsi dievaluasi menggunakan model isoterm, kinetika dan parameter termodinamika. Hasil penelitian ini menunjukkan bahwa peningkatan efisiensi penyisihan warna dan penurunan kapasitas adsorpsi tanah liat terjadi pada dosis adsorben lebih tinggi dan konsentrasi awal zat warna lebih rendah. Dosis adsorben optimum untuk tanah liat Arcamanik, Dago dan Citatah dicapai pada dosis masing-masing sebesar 10 g/L; 10 g/L; dan 8 g/L, dengan penyisihan zat warna berturut-turut sebesar 65,9%; 65,9%; dan 76,6%. Waktu kesetimbangan adsorpsi RR 141 pada tanah liat Arcamanik dan Citatah dicapai pada 60 menit sedangkan pada tanah liat Dago tercapai pada 120 menit. Kinetika adsorpsi RR 141 pada seluruh tanah liat lokal yang diteliti sesuai dengan model pseudo second order. Data kesetimbangan adsorpsi RR 141 pada tanah liat Arcamanik paling baik digambarkan oleh model isoterm Freundlich sedangkan untuk tanah liat Citatah dan Dago paling baik digambarkan oleh model isoterm Langmuir. Nilai perubahan energi bebas pada tanah liat Arcamanik, Citatah dan Dago masing-masing sebesar -4,794; -7,048 dan -4,234 kJ/mol.
STUDI MEKANISME DEGRADASI FOTOKATALITIK ZAT WARNA AZO ACID RED 4 MENGGUNAKAN KATALIS MIKROPARTIKEL TiO2 Sugiyana, Doni; Notodarmojo, Suprihanto
Arena Tekstil Vol 30, No 2 (2015)
Publisher : Arena Tekstil

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Abstract

Dalam penelitian ini dipelajari mekanisme degradasi fotokatalitik air limbah tekstil simulasi mengandung zat warna azo Acid Red 4 (AR4) menggunakan katalis mikropartikel TiO2.Tujuan penelitian ini adalah untuk memperoleh gambaran tahapan degradasi fotokatalitik berupa pemutusan struktur molekul zat warna AR4. Mekanisme degradasi dianalisis melalui pengukuran terhadap TOC, pH dan spektra absorbansi warna seiring interval waktu proses fotokatalitik, dilanjutkan dengan identifikasi produk degradasi menggunakan GC-MS. Setelah irradiasi UV selama 5 jam terjadi penurunan TOC hingga 90%, mengindikasikan terjadinya proses mineralisasi terhadap AR4. Penurunan puncak spektra absorbansi pada rentang panjang gelombang 300-320 nm dan 490-510 nm menunjukkan adanya pemutusan struktur molekul AR4 menjadi senyawa yang lebih sederhana, terdiri dari pemutusan kromofor warna (ikatan azo) dan pemutusan cincin-cincin senyawa amina aromatik (cincin benzen dan naftalen). Lebih lanjut, identifikasi produk degradasi dengan GC-MS seiring interval waktu proses fotokatalitik menunjukkan bahwa proses degradasi diawali dengan tahapan pemutusan molekul zat warna menjadi senyawa antara dilanjutkan dengan tahapan destruksi senyawa antara menjadi asam-asam organik sederhana yang mendekati tingkat mineralisasi.
AGRICULTURAL PESTICIDE USE IN THE UPPER CITARUM RIVER BASIN: BASIC DATA FOR MODEL-BASED RISK MANAGEMENT Utami, Rosetyati R.; Geerling, Gertjan W.; Salami, Indah R. S.; Notodarmojo, Suprihanto; Ragas, Ad M.J.
Journal of Environmental Science and Sustainable Development
Publisher : UI Scholars Hub

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Abstract

Since the middle of the 20th century, pesticide use has been a primary foundation of global agricultural development. However, the massive usage of pesticides can have detrimental impacts on human health and the environment, particularly in the aquatic ecosystem. This study determined the use of pesticides in the agricultural area of the Upper Citarum River Basin (UCRB); a crucial water resource on Java Island. A survey of 174 farmers was conducted in eight districts along the basin by using the random walk and quota sampling method. The questionnaire was designed to acquire data about the amount and types of pesticides used by farmers. Pre-survey was conducted to evaluate the feasibility of the questionnaire draft. The respondents’ answers were inputted into an equation to estimate the pesticide use per year. The survey results showed that 31 different pesticides were used for 21 types of crops. Profenofos and Mancozeb were the two most used pesticides, among all. The highest annual average used per hectare was reported for Chlorothalonil on tomato (32.2 kg/ha/year), followed by Mancozeb on corn (28.6 kg/ha/year), and Chlorpyrifos on chili (26.1 kg/ha/year). Overall, the pesticide use estimation in the study area is relatively high, with an annual average of 24.6 kg/ha/year. A comparison between prescribed and actual use on rice (representing more than 64% of the total surveyed area) showed that most pesticides are used in line with the prescriptions, but about a quarter is used in larger amounts than recommended. This comparison also revealed that some farmers use pesticides for rice that are not recommended for rice farming. In conclusion, the data presented in this study can be used to estimate pesticide emissions for environmental risk assessment and to support water quality monitoring, especially since public accessibility of pesticide information is commonly limited in Indonesia and other low- and middle-income countries.
Textile Dye Reactive Black 5 (RB5) Bio-Sorption with Moving Bed Biofilm Reactor and Activated Sludge Suryawan, I Wayan Koko; Helmy, Qomarudin; Notodarmojo, Suprihanto; Pratiwi, Riska; Septiariva, Iva Yenis
Indonesian Journal of Environmental Management and Sustainability Vol. 5 No. 2 (2021): June
Publisher : Research Centre of Inorganic Materials and Complexs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2021.5.2.67-71

Abstract

Reactive Black 5 (RB5) is one of the dyes used in textile industries in Indonesia. However, the high color content can interfere with the condition of water bodies if not treated. This waste treatment process is usually treated with biological treatment processes. Biological processing often used is the MBBR unit and activated sludge. This study aims to determine the RB5 dye’s bio-sorption efficiency using MBBR processing and activated sludge. MBBR processing and activated sludge consist of seeding, acclimatization, and running stages. This research was carried out using a real textile wastewater approach by adding 100 mg/L RB5 and adding 1000 mg/L starch solution. The processing results of the seeding stage indicate increasing in biomass. The acclimatization stage with 50% and 75% of wastewater indicates increased biomass and color removal. The RB5 color removal efficiency results in the MBBR unit and activated sludge show 41% and 84% values. The MBBR processing shows fluctuations each time where the desorption process occurs in the color removal. For this reason, the ozone pre-treatment process is conducted in the MBBR unit. The integrated pre-treatment with MBBR results show the same fluctuation as the previous processing with a color removal efficiency of 43% with a color removal efficiency of 43%.
Potential of Waste to Energy Processing for Sustainable Tourism in Nusa Penida Island, Bali Sari, Mega Mutiara; Inoue, Takanobu; Harryes, Regil Kentaurus; Suryawan, I Wayan Koko; Yokota, Kuriko; Notodarmojo, Suprihanto; Priyambada, Ika Bagus; Septiariva, Yenis
Jurnal Bahan Alam Terbarukan Vol 10, No 2 (2021): December 2021 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v10i2.33679

Abstract

Solid waste management on Nusa Penida Island is one of the problems in tourism in Bali Province. To deal with this issue, the government has implemented various policies, where the policy that becomes an essential issue is the processing of energy waste. To support this, it is necessary to study the potential of waste characteristics on the island of Nusa Penida. This study aims to analyse the characteristics of waste on the island of Nusa Penida as an energy source based on the generation and composition of waste. Solid waste generation and composition were measured based on land and marine debris data. The total waste generation on land and marine debris can reach 6364.4 kg/day and 762.8 kg/day, respectively. The waste composition materials consist of masks, plastics, metals, and biodegradable organics with a value of 4.12%, 32.77%, 19.54%, and 43.57%, respectively. Therefore, the potential use of organic biodegradable as solid fuel can reach 51,933.8 MJ/day or 14,426 kWh/day. However, in the thermogravimetric analysis (TGA) test, the residue was 18.6%.
The Effects of Influent Debit on Hydrodynamic Characteristic of Bojongsoang Facultative Pond: Without Wind Effects Hadisoebroto, Rositayanti; Notodarmojo, Suprihanto
Makara Journal of Technology Vol. 8, No. 3
Publisher : UI Scholars Hub

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Abstract

The Effects of Influent Debit on Hydrodynamic Characteristic of Bojongsoang Facultative Pond: Without Wind Effects. The performance of facultative pond in Bojongsoang WWTP have reported to be unstable. One of the cause of the unstable performance is the hydrodynamic characteristics that not met the criterion. The improper hydrodynamic characteristics are included the existence of dead-zone, the short-circuiting, and the turbulence due to eddy current. The study was to analyze the effect of the influent debit variation on the hydrodynamic characteristics of the pond using mathematical model. The two-dimensional hydrodynamic model was built from two hydrodynamic equations which are continuity and momentum equations. The equations were solved by finite-difference numerical method of semi-implicit (Crank-Nicolson). From the simulation results, the Froude number of the water flow was analyzed. Beside that, the effective residence time and the effective area were calculated. All of them were done to analyzed the existence of the dead-zone in the pond. The simulation results show that the dead-zone was exist in the center of the pond. when the influent debit was larger, the effective residence time and the effective area become larger. The distribution of the Froude number value shows that the area with the value of 10-10 become reduced in the larger influent debit. The existence of the dead-zone was reduced since the influent debit become larger. It can be said that the larger influent debit can improve the hydrodynamic characteristics of the pond.
Effect of Catholyte Concentration on Current Production During Chocolate Industry Wastewater Treatment by a Microbial Fuel Cell Wulan, Diana Rahayuning; Notodarmojo, Suprihanto
Makara Journal of Technology Vol. 24, No. 2
Publisher : UI Scholars Hub

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Abstract

Microbial fuel cells (MFCs) use bacteria as a catalyst to oxidize organic and/or inorganic substrates and produce electric currents. Wastewater could function as an electron donor in the anode chamber and, thus, represents a very promising energy source. Catholytes, as electron acceptors, influence power production in MFCs by increasing the availability of electrons. The present research aims to determine the influence of catholyte concentration on current production in an aerobic two-chamber MFC. Aerobic treatment was carried out in the two-chamber MFC operated in an incubator at 37  1 °C with and without aeration in the cathode chamber. Wastewater from the chocolate industry was used as a substrate and oxidized by using a bacterial consortium isolated from the sludge wastewater itself. The catholytes used were 0.01, 0.05, 0.1, and 0.3 N NaCl. In the presence of NaCl, the chemical oxygen demand (COD) removal efficiency in the cathode chamber of the MFC was approximately 65%–83% without aeration and 76%–89% with aeration after 72 hours. The current density increased as the catholyte concentration increased to 0.05 N, after which the oxidation process shifted from the anode chamber to the cathode chamber. Addition of O2 to the cathode chamber influenced current production.
Co-Authors Doni Sugiyana, Doni Geerling, Gertjan W. Harryes, Regil Kentaurus Ika Bagus Priyambada Kuriko Yokota Nurulbaiti Listyendah Zahra, Nurulbaiti Listyendah Qomarudin Helmy, Qomarudin Ragas, Ad M.J. Riska Pratiwi Rositayanti Hadisoebroto, Rositayanti Salami, Indah R. S. Sari, Mega Mutiara Septiariva, Iva Yenis Septiariva, Yenis Suryawan, I Wayan Koko Takanobu Inoue Utami, Rosetyati R. Wulan, Diana Rahayuning