Rasyiq, Muhammad Rafi and Hendrix Yulis S.,, STP, M.Si, Ph.D and Dr. Dodyk Pranowo,, STP, M.Si (2022) Perhitungan Transfer Massa Nitrogen Pada Impregnasi Pupuk Cair Dalam Berbagai Jenis Arang Untuk Pembuatan Slow Release Fertilizer. Sarjana thesis, Universitas Brawijaya.
Abstract
Tingkat unsur hara di berbagai wilayah memiliki kadar yang berbeda-beda. Salah satu unsur hara yang penting dalam meningkatkan pertumbuhan tanaman adalah nitrogen. Namun sebagian besar unsur hara dalam pupuk pada umumnya memiliki tingkat kelarutan yang tinggi sehingga unsur hara di dalam tanah akan cepat hilang. Permasalahan tersebut dapat diatasi menggunakan slow release fertilizer. Bahan-bahan utama yang dapat digunakan umumnya memiliki kadar lignoselulosa tinggi seperti limbah kayu jati, limbah kayu sengon, dan limbah kulit kakao. Pembuatan slow release fertilizer dalam penelitian ini dilakukan menggunakan proses pirolisis dan dilanjutkan impregnasi (perendaman). Tujuan penelitian ini adalah untuk menganalisis jenis arang yang dapat mengikat nitrogen paling baik. Penelitian menggunakan Rancangan Acak Kelompok (RAK) menggunakan dua faktor yaitu lama perendaman (60 menit, 90 menit, dan 120 menit) dan jenis bahan (limbah kayu jati, limbah kayu sengon, dan limbah kulit kakao). Slow release fertilizer yang dihasilkan diuji kadar air, kadar abu, SEM-EDX, dan kadar nitrogennya. Data kadar nitrogen menjadi acuan dalam perhitungan transfer massa. Proses pembuatan arang menunjukkan bahwa kandungan selulosa bahan sebanding dengan jumlah kadar abu yang dihasilkan namun berbanding terbalik dengan jumlah kadar airnya. Pada pembuatan slow release fertilizer menunjukkan bahwa faktor jenis bahan dan lama perendaman berpengaruh nyata terhadap parameter kadar air, kadar abu, dan kadar nitrogen. Jenis bahan dan lama perendaman yang baik untuk menghasilkan slow release fertilizer terbaik adalah kayu sengon lama perendaman 120 menit dengan kadar air 52,05%, kadar abu 0,1375%, dan kadar nitrogen 0,0295%. Hasil uji SEM menunjukkan bahwa ukuran pori slow release fertilizer sengon lebih besar dibandingkan arang kontrol sengon. Nilai koefisien transfer massa pada slow release fertilizer berbahan sengon sebesar 0,0301. Transfer massa yang terjadi menunjukkan penurunan seiring bertambahnya waktu perendaman dikarenakan titik jenuh larutan telah tercapai sehingga transfer massa akan berhenti.
English Abstract
Nutrient levels in different regions have different levels. One of the important nutrients in increasing plant growth is nitrogen. However, most of the nutrients in fertilizers generally have a high level of solubility so that the nutrients in the soil will quickly disappear. This problem can be overcome using slow release fertilizer. The main materials that can be used generally have high lignocellulose content, such as teak waste, sengon wood waste, and cocoa husk waste. The manufacture of slow release fertilizer in this study was carried out using the pyrolysis process and followed by impregnation (soaking). The purpose of this study was to analyze the type of charcoal that can bind nitrogen the best. The study used a Randomized Block Design (RAK) using two factors, namely the immersion time (60 minutes, 90 minutes, and 120 minutes) and the type of material (teak wood waste, sengon wood waste, and cocoa bark waste). The resulting slow release fertilizer was tested for moisture content, ash content, SEM-EDX, and nitrogen content. Nitrogen content data becomes a reference in calculating mass transfer. The process of making charcoal shows that the cellulose content of the material is proportional to the amount of ash content produced but inversely proportional to the amount of water content. In the manufacture of slow release fertilizer, it was shown that the type of material and the duration of soaking had a significant effect on the parameters of water content, ash content, and nitrogen content. The type of material and the best soaking time to produce the best slow release fertilizer is sengon wood with a soaking time of 120 minutes with a moisture content of 52.05%, ash content of 0.1375%, and nitrogen content of 0.0295%. The SEM test results showed that the pore size of the slow release fertilizer of sengon was larger than that of control sengon charcoal. The mass transfer coefficient value for slow release fertilizer made from sengon is 0.0301. The mass transfer that occurs shows a decrease with increasing immersion time because the saturation point of the solution has been reached so that the mass transfer will stop.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | 0522100403 |
| Uncontrolled Keywords: | slow release fertilizer, impregnasi, pirolisis, nitrogen, transfer massa,slow release fertilizer, impregnation, pyrolisis, nitrogen, mass transfer |
| Subjects: | 300 Social sciences > 338 Production > 338.1 Agriculture > 338.16 Production efficiency |
| Divisions: | Fakultas Teknologi Pertanian > Teknologi Industri Pertanian |
| Depositing User: | soegeng sugeng |
| Date Deposited: | 01 Feb 2023 02:29 |
| Last Modified: | 01 Feb 2023 02:29 |
| URI: | http://repository.ub.ac.id/id/eprint/197197 |
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