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Budiman, Ismail
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Pemanfaatan Limbah Spent Bleaching Earth pada Stabilisasi Tanah Lempung dengan Clean Set Cement Sumarno, Agung; Prasetyo, Agus Mudo; Akbar, Fazhar; Widodo, Eko; Triastuti, Triastuti; Maidina, Maidina; Nugroho, Ananto; Budiman, Ismail; Subiyanto, Bambang
Jurnal Teknologi Lingkungan Vol. 22 No. 1 (2021)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1041.015 KB) | DOI: 10.29122/jtl.v22i1.4125

Abstract

ABSTRACT The utilization of waste as soil stabilization materials is a solution to reduce the amount of waste and improve the building materials quality. This research is using Spent Bleaching Earth (SBE) materials from the palm oil industry waste. SBE can be reused to be pozzolan materials. This research aimed to investigate the SBE waste effect as an admixture on clay stabilization used 10% Clean Set Cements (CS-60) on density and California Bearing Ratio (CBR). A combination of CS-60 and SBE waste was expected to increase the CBR value of clay. Furthermore, SBE waste would decrease cementitious material for clay stabilization. Variation comparison of Clay : CS-60 : SBE on ST03, ST04, and ST05 were 67.5% : 10% : 22.5%; 45% : 10% : 45% and 22.5% : 10% : 67.5% respectively. The test was conducted on water content, density, and load penetration based on SNI 1744:2012. Generally, the CBR value of subgrade and improved subgrades oil with the moderate and good category are about 5-20%. As a result, the CBR value of ST 01 as original clay and ST 02 as clay with 10% CS-60 was 3.24% and 5.01%, respectively. Using SBE waste as an admixture material on clay stabilization increased CBR value better than clay stabilization used CS-60. ST03, ST04, and ST05 with CBR's value were 5.39%, 8.52%, and 17.99%, respectively. Furthermore, the density value decreased when SBE waste is used. Keywords : california bearing ratio, clay, clean set cement, spent bleaching earth, stabilization.   ABSTRAK Pemanfaatan limbah sebagai bahan stabilisasi tanah lempung merupakan solusi dalam mengurangi jumlah limbah dan meningkatkan mutu dari bahan bangunan. Penelitian ini menggunakan material Spent Bleaching Earth (SBE) dari limbah industri pengolahan minyak kelapa sawit. SBE dapat dimanfaatkan sebagai material pozzolan. Penelitian ini bertujuan untuk mengetahui pengaruh limbah SBE sebagai bahan tambah pada stabilisasi tanah lempung yang menggunakan 10% Clean Set Cements (CS-60) terhadap densitas dan California Bearing Ratio (CBR). Kombinasi limbah SBE dengan CS-60 diharapkan mampu meningkatkan nilai CBR tanah lempung. Selain itu, juga mengurangi penggunaan bahan berbasis semen untuk stabilisasi tanah lempung. Variasi perbandingan tanah lempung : CS-60 : SBE yang digunakan pada sampel ST03, ST04, dan ST05 berturut-turut 67,5% : 10% : 22,5%, 45% : 10% : 45% dan 22,5% : 10% : 67,5%. Pengujian yang dilakukan meliputi pengujian kadar air, densitas, dan penetrasi beban yang mengacu pada SNI 1744:2012. Secara umum, nilai CBR tanah dasar dan tanah timbunan dengan kategori sedang dan baik berkisar antara 5-20%. Hasil penelitian ini memperlihatkan bahwa sampel ST01 yang berupa tanah lempung asli memiliki nilai CBR 3,24% dan sampel ST02 yang berupa tanah lempung yang distabilisasi dengan 10% CS-60 menghasilkan nilai CBR 5,01%. Penambahan limbah SBE dapat meningkatkan nilai CBR dengan nilai yang lebih tinggi bila dibanding dengan hanya distabilisasi dengan CS-60, hal ini terlihat pada sampel ST03, ST04, dan ST05 dengan nilai CBR berurutan sebesar 5,39%, 8,52%, dan 17,99%. Selain itu, penambahan limbah SBE juga akan menurunkan densitas dari tanah lempung.   Kata kunci : california bearing ratio, clean set cement, spent bleaching earth, stabilisasi, tanah lempung.
Pemanfaatan Limbah Spent Bleaching Earth pada Stabilisasi Tanah Lempung dengan Clean Set Cement Sumarno, Agung; Prasetyo, Agus Mudo; Akbar, Fazhar; Widodo, Eko; Triastuti, Triastuti; Maidina, Maidina; Nugroho, Ananto; Budiman, Ismail; Subiyanto, Bambang
Jurnal Teknologi Lingkungan Vol. 22 No. 1 (2021)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1041.015 KB) | DOI: 10.29122/jtl.v22i1.4125

Abstract

ABSTRACT The utilization of waste as soil stabilization materials is a solution to reduce the amount of waste and improve the building materials quality. This research is using Spent Bleaching Earth (SBE) materials from the palm oil industry waste. SBE can be reused to be pozzolan materials. This research aimed to investigate the SBE waste effect as an admixture on clay stabilization used 10% Clean Set Cements (CS-60) on density and California Bearing Ratio (CBR). A combination of CS-60 and SBE waste was expected to increase the CBR value of clay. Furthermore, SBE waste would decrease cementitious material for clay stabilization. Variation comparison of Clay : CS-60 : SBE on ST03, ST04, and ST05 were 67.5% : 10% : 22.5%; 45% : 10% : 45% and 22.5% : 10% : 67.5% respectively. The test was conducted on water content, density, and load penetration based on SNI 1744:2012. Generally, the CBR value of subgrade and improved subgrades oil with the moderate and good category are about 5-20%. As a result, the CBR value of ST 01 as original clay and ST 02 as clay with 10% CS-60 was 3.24% and 5.01%, respectively. Using SBE waste as an admixture material on clay stabilization increased CBR value better than clay stabilization used CS-60. ST03, ST04, and ST05 with CBR's value were 5.39%, 8.52%, and 17.99%, respectively. Furthermore, the density value decreased when SBE waste is used. Keywords : california bearing ratio, clay, clean set cement, spent bleaching earth, stabilization.   ABSTRAK Pemanfaatan limbah sebagai bahan stabilisasi tanah lempung merupakan solusi dalam mengurangi jumlah limbah dan meningkatkan mutu dari bahan bangunan. Penelitian ini menggunakan material Spent Bleaching Earth (SBE) dari limbah industri pengolahan minyak kelapa sawit. SBE dapat dimanfaatkan sebagai material pozzolan. Penelitian ini bertujuan untuk mengetahui pengaruh limbah SBE sebagai bahan tambah pada stabilisasi tanah lempung yang menggunakan 10% Clean Set Cements (CS-60) terhadap densitas dan California Bearing Ratio (CBR). Kombinasi limbah SBE dengan CS-60 diharapkan mampu meningkatkan nilai CBR tanah lempung. Selain itu, juga mengurangi penggunaan bahan berbasis semen untuk stabilisasi tanah lempung. Variasi perbandingan tanah lempung : CS-60 : SBE yang digunakan pada sampel ST03, ST04, dan ST05 berturut-turut 67,5% : 10% : 22,5%, 45% : 10% : 45% dan 22,5% : 10% : 67,5%. Pengujian yang dilakukan meliputi pengujian kadar air, densitas, dan penetrasi beban yang mengacu pada SNI 1744:2012. Secara umum, nilai CBR tanah dasar dan tanah timbunan dengan kategori sedang dan baik berkisar antara 5-20%. Hasil penelitian ini memperlihatkan bahwa sampel ST01 yang berupa tanah lempung asli memiliki nilai CBR 3,24% dan sampel ST02 yang berupa tanah lempung yang distabilisasi dengan 10% CS-60 menghasilkan nilai CBR 5,01%. Penambahan limbah SBE dapat meningkatkan nilai CBR dengan nilai yang lebih tinggi bila dibanding dengan hanya distabilisasi dengan CS-60, hal ini terlihat pada sampel ST03, ST04, dan ST05 dengan nilai CBR berurutan sebesar 5,39%, 8,52%, dan 17,99%. Selain itu, penambahan limbah SBE juga akan menurunkan densitas dari tanah lempung.   Kata kunci : california bearing ratio, clean set cement, spent bleaching earth, stabilisasi, tanah lempung.
Synthesis and Characterization of Activated Carbon from Lignocellulosic Biomass: Oil Palm Empty Fruit Bunches and Mahogany Sawdust Arundina, Ria Yolanda; Permana, Indri; Togatorop, Ester Rimma Suryani; Ismadi, Ismadi; Kusumah, Sukma Surya; Budiman, Ismail; Subyakto, Subyakto; Marlina, Resti
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.v10i2.33488

Abstract

Lignocellulosic biomass is a biological residue from the agricultural or forestry industry which is composed of polymeric cellulose, hemicellulose, lignin, and other extractive components. One of the products in the utilization of lignocellulosic biomass waste is activated carbon products. In this study, two types of lignocellulosic biomass waste were used, namely Empty Palm Oil Bunches (OPEFB) and Mahogany Sawdust (MS) to be converted into activated carbon using the hydrothermal-pyrolysis method. Potassium hydroxide (KOH) was used as an activating agent at high concentrations (50% w/w) to improve the adsorption mechanism in activated carbon material. Proximate analysis was carried out to obtain information related to yield, moisture content, and ash content. In addition, activated carbon samples were characterized using FTIR, XRD, and FESEM to observe the chemical bonds, structure, and morphology of activated carbon, respectively. The proximate analysis showed that the activated carbon sample had met the SNI 63-3730-1995 standard for technical activated carbon on the parameters of water content and ash content, while the FTIR spectrum showed the mechanism of biomass conversion from raw materials to activated carbon on a chemical bond approach. Furthermore, the XRD graph shows a reduction in the crystal size of the material from raw material to activated carbon material. Finally, the FESEM image shows a significant increase in the quality and quantity of pores on the carbon material before and after activation.
Physical Properties of Bioplastic Composite Synthesized from Sago Waste and Betung Bamboo Activated Carbon Aprilianda, Aprilianda; Budiman, Ismail; Kurniati, Mersi; Sari, Yessie Widya
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 8, No 3 (2023): September 2023
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v8i3.1885

Abstract

Bioplastics are expected to reduce the use of commercial plastics. Several efforts have been made to improve the properties of bioplastics, including the addition of antioxidants or antimicrobial agents. One of the antimicrobial agents is activated charcoal or activated carbon. This study was aimed to investigate the effect of activated carbon addition to the bioplastic composite. Sago waste was utilized as the matrix in the composite, while activated carbon was as filler. Sago waste is the leftover biomass resulted from the sago extraction. The proximate analysis showed that the composition of sago waste was mostly dominated by the fibrous materials followed by protein and fat. The activated carbon was obtained from the treatment of Betung bamboo. The Fourier Transform Infrared (FTIR) spectroscopy indicated that the thermal treatment of Betung bamboo at 175 °C for 5 h resulted The treated sago waste  was immersed in 5% KOH  for 24 h and further dried and then pyrolyzed at 750 °C for 90 min to yield activated carbon. The activated carbon was dominated by the carbonaceous materials. This was also supported by the proximate data indicating the presence of 91% carbonaceous materials in activated carbon.  The Brunauer Emmett Teller (BET) analysis showed that the activated carbon has surface area of 460 m2/g. This activated carbon was then used as filler at bioplastic composites. Two levels of activated carbon percentage on composite were tested, which were 3-5% (% m/v). The mechanical analysis using universal testing machine indicated that the addition of activated carbon reduces the tensile strength and modulus of elasticity. The scanning electron microscopy (SEM) images clearly indicated the presence of activated carbon on the surface of bioplastics.  The data obtained in this study showed the potential of composite sago waste and activated carbon as bioplastics. Further, the activated carbon obtained in this study can serve as an adsorbent, providing possible applications as antibacterial agent. Keywords – Activated Carbon, Biomass, Bioplastic, Composite, Pyrolysis, Sago Waste.
Control System for BLDC (Brushless Direct Current) Motor in Electric Vehicles Adam, Adam; Abidin, Zainal; Efendi, Zulfan; Alkhalefi, Dhani; Budiman, Ismail; Prasetyo, Bagas
ABEC Indonesia Vol. 12 (2024): 12th Applied Business and Engineering Conference
Publisher : Politeknik Negeri Bengkalis

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Electric vehicles represent an effective alternative to reduce environmental pollution caused by emissionsfrom fossil fuel-powered vehicles. This study utilizes a 1500-watt Brushless Direct Current (BLDC) motor as the drivemotor. Unlike conventional DC motors, BLDC motors operate with three phases, requiring an automation system toensure optimal distribution of current and voltage across each phase. For motor control, a Convenient Speed Controlsystem with a maximum power of 3000 watts is implemented. This system allows the vehicle to move forward andbackward, as well as enabling manual throttle operation. During the experiment, the fully charged battery displayed aninitial voltage of 53.2 volts for the forward mode and 52.8 volts for the reverse mode. The current required for forwardmovement was measured at 18 A, while for reverse it was 12.9 A. The minimum speed achieved by the electric vehiclewas 88.8 RPM, whereas the maximum recorded speed was 316.9 RPM. Thus, this control system is not only efficient inregulating speed but also provides flexibility in operating the electric vehicle, supporting efforts toward moreenvironmentally friendly transportation solutions.
RELASI ANTAR KARAKTERISTIK MAKROSKOPIS PADA BATANG BAMBU KUNING DAN SERO (Macroscopic Characteristic Relationships on Kuning and Sero Bamboo Culm) Liliefna, Leonard Dantje; Siruru, Herman; Budiman, Ismail
Jurnal Penelitian Hasil Hutan Vol. 42 No. 2 (2024): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jphh.2024.6076

Abstract

Ukuran karakteristik makroskopis bervariasi menurut arah panjang batang bambu. Bambu kuning dan bambu sero memiliki ukuran panjang ruas dan tebal dinding batang yang sangat berbeda, sehingga penting untuk mempelajari bentuk sebaran karakteristik makroskopisnya, serta mengetahui bagaimana batang bambu mempertahankan keseimbangan antar karakteristik makroskopisnya terhadap berat tajuknya sendiri dan terpaan angin. Selain itu, dibutuhkan model untuk mengestimasi proporsi panjang batang bambu yang memenuhi ukuran tebal dinding minimum pada pembuatan bambu lamina. Karena terdapat variasi panjang batang antar contoh uji, maka digunakan normalisasi jarak dari pangkal batang sebagai variabel panjang batang. Tujuan penelitian ini adalah mendeterminasi bentuk sebaran karakteristik makroskopis, menggunakan rasio antar karakteristik makroskopis untuk mengetahui bagaimana batang bambu mempertahankan keseimbangan antar karakteristik makroskopisnya terhadap berat tajuknya sendiri serta terpaan angin, dan membangun model hubungan antara tebal dinding dan normalisasi jaraknya dari pangkal batang guna mengestimasi besarnya proporsi panjang batang bambu yang memenuhi ukuran minimum pada pembuatan bilah bambu. Metode analisis regresi polinomial digunakan untuk memodelkan hubungan antar variabel. Hasil penelitian menunjukkan bahwa bentuk sebaran karakteristik makroskopis serta rasionya (D/R, td/D, td/R) pada jenis bambu kuning dan bambu sero memiliki bentuk hubungan yang non-linear. Pada bagian pangkal hingga ke bagian tengah batang, nilai rasio tersebut menurun, sedangkan pada bagian tengah hingga ke bagian ujung, batang bambu cenderung mempertahankan besarnya rasio tersebut relatif konstan dengan sedikit menanjak ke bagian ujung. Model polinomial yang diperoleh untuk hubungan antara tebal dinding (td) dan normalisasi jaraknya (X%) untuk jenis bambu kuning adalah , dan untuk jenis bambu sero adalah.
Co-Authors . Zulfan Adam Adam Akbar, Fazhar Alkhalefi, Dhani Ananto Nugroho, Ananto Aprilianda, Aprilianda Arundina, Ria Yolanda Bambang Subiyanto, Bambang Budy Wiryawan Ismadi Ismadi Kusumah, Sukma Surya Liliefna, Leonard Dantje Maidina, Maidina Marlina, Resti Mersi Kurniati Permana, Indri Prasetyo, Agus Mudo Prasetyo, Bagas Siruru, Herman Subyakto Subyakto Sumarno, Agung Togatorop, Ester Rimma Suryani Triastuti, Triastuti Yessie Widya Sari Zainal Abidin