http://repository.ipb.ac.id/handle/123456789/100 2026-07-09T06:20:48Z http://repository.ipb.ac.id/handle/123456789/174238 Analisis Emisi N2O pada Sistem Fertigasi Otomatis Nirdaya (FONi) dengan Variasi Tinggi Muka Air dan Pemupukan untuk Budidaya Padi Sawah Tebe, Diana Budidaya padi sawah menghasilkan emisi gas rumah kaca, termasuk N2O, yang dipengaruhi oleh pengelolaan air dan pemupukan. Penelitian ini bertujuan menganalisis pengaruh parameter kondisi tanah, variasi tinggi muka air, dan jenis pupuk terhadap emisi N2O pada budidaya padi menggunakan sistem Fertigasi Otomatis Nirdaya (FONi). Penelitian dilakukan di Kinjiro Farm pada Februari–Juni 2026 dengan empat perlakuan tinggi muka air, yaitu tergenang (RT), basah (RB), kering (RK), dan berselang (RBe), serta pupuk organik dan anorganik. Emisi N2O diukur mingguan menggunakan metode closed chamber dan dianalisis dengan gas kromatografi. Hasil menunjukkan bahwa variasi tinggi muka air tidak berpengaruh nyata terhadap emisi N2O, sedangkan jenis pupuk berpengaruh nyata melalui proses nitrifikasi dan denitrifikasi. Emisi tertinggi terjadi pada RBe dengan pupuk anorganik sebesar 12,30 kg/ha/musim dan terendah pada RT dengan pupuk organik sebesar 2,63 kg/ha/musim. Penggunaan pupuk organik dan tinggi muka air 0–2 cm berpotensi menekan emisi N2O pada budidaya padi sawah.; Rice cultivation produces greenhouse gas emissions, including nitrous oxide (N2O), which are influenced by water and fertilizer management. This study aimed to analyze the effects of soil condition parameters, water table variations, and fertilizer types on N2O emissions in rice cultivation using the Fertigasi Otomatis Nirdaya (FONi) system. The study was conducted at Kinjiro Farm from February to June 2026 using four water table treatments: flooded (RT), wet (RB), dry (RK), and intermittent (RBe), combined with organic and inorganic fertilizers. N2O emissions were measured weekly using the closed chamber method and analyzed by gas chromatography. The results showed that water table variation had no significant effect on N2O emissions, whereas fertilizer type significantly affected emissions through nitrification and denitrification processes. The highest emission was observed in the RBe treatment with inorganic fertilizer (12.30 kg ha?¹ season?¹), while the lowest occurred in the RT treatment with organic fertilizer (2.63 kg ha?¹ season?¹). The use of organic fertilizer and maintaining a water table depth of 0–2 cm showed potential for reducing N2O emissions in rice cultivation. 2026-01-01T00:00:00Z http://repository.ipb.ac.id/handle/123456789/174233 Thermal Evaluation and MultiObjective Optimization of Moving Bed Biofilm Reactor Post-Treatment for Palm Oil Mill Effluent Based on Activated Sludge Model No. 1 ARITONANG, MIKAEL FEBRIAN Sistem AnRBC termodifikasi sebelumnya belum mampu menurunkan senyawa organik terlarut pada POME secara memadai, sehingga diperlukan unit pasca-pengolahan aerobik untuk meningkatkan kualitas efluen akhir. Penelitian ini mengevaluasi MBBR sebagai unit pasca-pengolahan POME menggunakan Activated Sludge Model No. 1 (ASM1). HRT pada unit AnRBC dan MBBR divariasikan dalam tiga kondisi operasional, yaitu 1, 2, dan 3 hari. Efisiensi penyisihan TCOD tertinggi mencapai 91,76% pada HRT 3 hari, dengan penurunan TCOD dari 3052,90 mg/L menjadi 251,63 mg/L. Model ASM1 menunjukkan kemampuan prediksi yang baik dengan data pengamatan, dengan R² = 0,997 dan MAPE = 3,07%. Evaluasi termal berbasis TCOD juga menunjukkan kemampuan prediksi baik dengan MAPE = 4,40%. Optimasi multi-objektif mengidentifikasi kondisi terbaik pada HRT 3,25 hari, suhu 33 °C, pH 7,5, dan luas permukaan spesifik media 1200 m²/m³, menghasilkan prediksi COD efluen sebesar 322,6 mg/L, OUR sebesar 31,19 mg O2/(L.d), dan SEC sebesar 60,57 kWh/kgCODtersisihkan.; The modified AnRBC system was previously unable to sufficiently reduce soluble organic compounds in POME, indicating the need for an aerobic posttreatment unit to improve final effluent quality. This research evaluated a MBBR as a post-treatment unit for POME treatment using Activated Sludge Model No. 1 (ASM1). The HRT in the AnRBC and MBBR units was varied under three operational conditions of 1, 2, and 3 d. The highest TCOD removal efficiency reached 91.76% at HRT of 3 d, reducing TCOD from 3052.90 mg/L to 251.63 mg/L. The ASM1 model showed good predictive with observed data, with R² = 0.997, MAPE = 3.07%. The TCOD-based thermal evaluation also described good predictive with MAPE = 4.40%. Multi-objective optimization identified the best condition at HRT of 3.25 days, temperature of 33 °C, pH 7.5, and carrier-specific surface area of 1200 m²/m³, producing predicted effluent COD of 322.6 mg/L, OUR of 31.19 mg O2/(L.d), and SEC of 60.57 kWh/kgCODremoved. 2026-01-01T00:00:00Z http://repository.ipb.ac.id/handle/123456789/174232 Efektifitas Biostabilisasi Tanah Pasir Menggunakan Miselium Jamur Dengan Substrat Bekatul, Kedelai, dan Kacang Hijau Aryanti, Windy Dwi Biostabilisasi tanah menggunakan miselium jamur memanfaatkan jaringan hifa sebagai pengikat antarpartikel tanah. Penelitian bertujuan mengevaluasi pengaruh jenis dan dosis substrat, kadar air awal, serta waktu pemeraman terhadap pertumbuhan miselium dan nilai Unconfined Compressive Strength (UCS). Penelitian dilakukan menggunakan tiga jenis substrat, yaitu tepung kacang hijau, bekatul, dan kedelai, dengan variasi dosis 5, 7, 10, 15, dan 20% terhadap berat kering tanah. Variasi kadar air awal yang digunakan adalah 10, 15, 20, dan 25%, serta waktu pemeraman selama 7, 14, dan 28 hari. Dosis substrat optimum berada pada kadar 10–15%, sedangkan kadar air optimum ada pada kadar 15%. Kedelai menghasilkan nilai UCS tertinggi sebesar 314,30 kPa pada dosis 15%, kadar air awal 15%, dan waktu pemeraman 14 hari. Tepung kacang hijau menghasilkan nilai UCS maksimum sebesar 300,00 kPa pada kondisi yang sama, sedangkan bekatul menunjukkan kekuatan yang lebih rendah. Sampel mengalami peningkatan UCS hingga umur pemeraman 14 hari, kemudian menurun pada umur 28 hari; Soil biostabilization using fungal mycelium is a method that utilizes hyphal networks as binding agents between soil particles. This study aimed to evaluate the effects of substrate type and dosage, initial water content, and curing time on mycelial growth and the Unconfined Compressive Strength (UCS) of sandy soil. The study employed three substrate types, namely mung bean flour, rice bran, and soybean flour, with substrate dosages of 5, 7, 10, 15, and 20% based on the dry weight of the soil. The initial water contents used were 10, 15, 20, and 25%, while the curing periods were set at 7, 14, and 28 days. The optimum substrate dosage ranged from 10% to 15%, while an optimum initial water content of 15% produced higher UCS. Soybean flour yielded the highest UCS value of 314.30 kPa at a dosage of 15%, an initial water content of 15%, and a curing time of 14 days. Mung bean flour produced a maximum UCS value of 300.00 kPa under the same conditions, whereas rice bran resulted in lower. Specimens exhibited an increase in UCS up to 14 days of curing, followed by a decline after 28 days of curing. 2026-01-01T00:00:00Z http://repository.ipb.ac.id/handle/123456789/174219 NaOH-Activated Oil Palm Empty Fruit Bunch Biochar Adsorption for Integrated Anaerobic–Aerobic Treatment of Palm Oil Mill Effluent PRASETYANINGTYAS, AZMYA Palm Oil Mill Effluent (POME) contains high concentrations of oil and grease (O&G) and organic matter that require effective treatment. This study evaluated NaOH-activated oil palm empty fruit bunch (OPEFB) biochar integrated with an Upflow Anaerobic Sludge Blanket (UASB) reactor and Rotating Biological Contactor (RBC), and developed a simplified first-order adsorption–Anaerobic Digestion Model No. 1 (ADM1) framework to predict soluble chemical oxygen demand (sCOD) removal. Biochar activated with 1 M NaOH achieved the highest O&G removal efficiency (75.93%). The integrated system removed over 97% of O&G, while the highest sCOD removal efficiency (80.91 ± 9.58%) was obtained at a hydraulic retention time of 3 days. The model yielded calibration and validation R² values of 0.9463, 0.8773, and 0.5663. Overall, the integrated adsorption–UASB RBC system effectively enhanced POME treatment and provided a practical framework for predicting sCOD removal.; Limbah cair pabrik kelapa sawit (POME) mengandung minyak dan lemak (O&G) serta bahan organik yang tinggi sehingga memerlukan pengolahan. Penelitian ini mengevaluasi biochar tandan kosong kelapa sawit (TKKS) teraktivasi NaOH yang diintegrasikan dengan reaktor Upflow Anaerobic Sludge Blanket (UASB) dan Rotating Biological Contactor (RBC), serta mengembangkan model adsorpsi orde satu–Anaerobic Digestion Model No. 1 (ADM1) sederhana untuk memprediksi penyisihan soluble chemical oxygen demand (sCOD). Biochar teraktivasi NaOH 1 M menghasilkan penyisihan O&G tertinggi sebesar 75,93%. Sistem terintegrasi menyisihkan O&G lebih dari 97%, sedangkan penyisihan sCOD tertinggi mencapai 80,91 ± 9,58% pada HRT 3 hari. Model menghasilkan nilai R² kalibrasi dan validasi berturut-turut sebesar 0,9463; 0,8773; dan 0,5663. Integrasi adsorpsi biochar–UASB–RBC efektif meningkatkan pengolahan POME sekaligus menyediakan kerangka pemodelan untuk memprediksi penyisihan sCOD. 2026-01-01T00:00:00Z