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All Journal Seminar Nasional Teknik Kimia Kejuangan Semesta Teknika Media Mesin: Majalah Teknik Mesin JMPM (Jurnal Material dan Proses Manufaktur) BERDIKARI : Jurnal Inovasi dan Penerapan Ipteks Prosiding Seminar Nasional Program Pengabdian Masyarakat Jurnal Polimesin
Caroko, Novi
Universitas Muhammadiyah Yogyakarta
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences

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Journal : Semesta Teknika

 1 
Pengaruh Grain Size Arang Aktif dari Bahan Limbah Industri Sagu Aren terhadap Penyerapan Polutan Limbah Batik Kuncoro Diharjo, Sudarja , Novi caroko ,
Jurnal Semesta Teknika Vol 14, No 1 (2011): MEI 2011
Publisher : Jurnal Semesta Teknika

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Abstract

Sago palm industries leave large amount of wood waste that is about 30% of the volume of tree trunks, 20% in large size which can be used for the handcraft and about 10% in small-size which only wasted. On the other hand, batik industries produce hazardous and toxic waste (B3), that should be neutralized since this liquid waste are bad smell and  hard color, and even toxity  (contain various kinds of chemical elements and heavy metals such as Mercury (Hg), Lead (Pb), Chromium (Cr), Cadmium (Cd), and Copper (Cu)) and if the elements are absorbed by human body exceeds the threshold point, it would be dangerous. Therefore, experiment on activated carbon engineering and its use in adsorbing the B3 batik liquid waste is urgently required.  The main objective of the experiment is to know the adsorbsion effectivity of activated carbon in adsorbing the batik liquid waste. The main material used in producing activated carbon is waste palm tree trunks. The main material is heated to be charcoal in retort for about 5 hours, temperature around 500 º C. Furthermore, charcoal is crushed finely and screened in sizes of mesh 25, 35 and 50. Carbon powder then chemically activated using H2SO4 solution by heating in 500 ˚C for about 30 menutes. Finally this activated carbon used for adsorbing the hard colour and heavy metal (Pb, Cr, Cd) in the batik waste water. This research concluded that the sago aren industrial waste may be an alternative material for activated carbon which is effective in adsorbing the hard colour and hazardous heavy metal. Higher mesh size (grain size) of activated carbon give higher adsorbsion in colour and heavy metal. Activated carbon in mesh 25 adsorbed  68.59% Cd, 16.65% Cr, and 100% Pb, mesh 35 adsorb  76.25% Cd, 37.55% Cr and Pb at 100%, while mesh 50 adsorb 81.61% Cd, 58,33% Cr, and 100%  Pb.
Kaji Eksperimental Efektifitas Penyerapan Limbah Cair Industri Batik Taman Sari Yogyakarta Menggunakan Arang Aktif Mesh 80 dari Limbah Gergaji Kayu Jati Novi Caroko, Sudarja ,
Jurnal Semesta Teknika Vol 15, No 1 (2012): MEI 2012
Publisher : Jurnal Semesta Teknika

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Abstract

Utilization of teak wood saw scratches can be optimized by processing it becomes active charcoal which possesses higher economic value. The purpose of this study is to obtain mesh 80 activated charcoal made from teak sawing industrial waste and to determine it’s effectiveness in adsorbing heavy metals pollutant Cd, Pb, Cr, and colouring agent in liquid waste of batik industries. The charcoal is produced at ~5000 oC retort either for 4 hours or until white colour smoke does not appear. Charcoal was activated using H2SO4 at temperature of 5000 oC for 30 minutes in a furnace. There were 2 variables in this study, i.e weight of the activated charcoal (10, 15, 20 grams) and duration of the stirring (5, 10,15 minutes). Result of the research shows that activated charcoal made from teak wood saw scratches can be used as adsorbent in the liquid waste of batik industries such as heavy metals Cd, Pb, Cr, and dark colour. The colour gradation was found to decrease from 12600 TCU to 198 TCU, Pb content decrease from 0,189 mg/l to less than 0,0093 mg/L, Cd content decrease from 0,213 mg/l to less than  0,0093 mg/L, while Cr content decrease from 2,03 mg/l to 0,4205 mg/l.
Perbandingan Model Turbulen Spalart-Allmaras dan Reynolds Stress Model pada Analisis Efisiensi dan Rugi Tekanan Siklon Caroko, Novi; Suyitno, Suyitno
Semesta Teknika Vol 11, No 2 (2008): NOVEMBER 2008
Publisher : Semesta Teknika

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Abstract

Two different turbulence models, i.e. Spalart Allmaras (SA) and Reynolds stress model (RSM) are used as turbulence model in the cyclone investigation via numerical simulation. The appropriate turbulence model is key parameter on the analysis of cyclone performance. The cyclone has a characteristic diameter of 30 cm. Four different inlet gas velocities, i.e. 13.6 m/s, 14.7 m/s, 16.3 m/s, and 17.8 m/s are simulated in FLUENT. It is found that the particle separation efficiency is higher 90% for all inlet gas velocities variation when RSM is used as turbulence model. The pressure drop is increasing linearly with the inlet gas velocity. The utilization of RSM can give better result of efficiency and pressure drop than SA turbulence model.    
Studi Literatur Tentang Program Pump System Improvement Modeling Tool Untuk Penyempurnaan Kinerja Sistem Pompa Sukamta, Sukamta; Husda, Syamsul Muarif; Caroko, Novi
Semesta Teknika Vol 20, No 1 (2017): MEI 2017
Publisher : Semesta Teknika

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Abstract

In the industrial world often encountered actual loads do not match the design load.  These differences lead to energy wastage. Pumping system is one of the systems that always exist in the industry. Improving of pumping system performance is an important step in saving energy. Impeller trimming is one method to improve the performance of the pump system. One of the obstacles in performing the impeller trimming method is to determine the magnitude of the impeller diameter reduction to be performed. Currently, many software developed to improve the performance of pumps and pumping systems. One of the softwares is Pump System Improvement Modeling Tool (PSIM). Imprimer trimming method is one of the features in PSIM. To be optimal in the use of PSIM in the improvement of the pump system it is necessary to conduct a literature study on PSIM to improve the performance of the pump system. In this article has been studied PSIM literature on the process of perfection of centrifugal pump system with impeller trimmer method by taking case study on hot water provider system. The method used in this literature study is by comparing the results of PSIM calculations on case studies with the pump theory of the impeller trimming method. Through this comparison will be known the advantages of PSIM and weaknesses, PSIM calculation margin error compared to the theoretical calculations. By knowing these things then it can be determined the limits of the use of PSIM in the improvement of pump system performance. The result of analysis shows that PSIM trimming impeller calculation is based more on the calculation according to affinity law than any other theory, even in the calculation there is error margin. The tendency of data is the greater the value of the reduction the greater the deviation. If based on the theory then the calculation of PSIM which can be used as a guide in calculating the reduction of diameter is a maximum reduction of 15% or 85% of the original diameter. A larger reduction of the value needs to be re-measured to the characteristics of the pump system.
Studi Literatur Tentang Program Pump System Improvement Modeling Tool Untuk Penyempurnaan Kinerja Sistem Pompa Sukamta, Sukamta; Husda, Syamsul Muarif; Caroko, Novi
Semesta Teknika Vol 20, No 1 (2017): MEI 2017
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v20i1.3307

Abstract

In the industrial world often encountered actual loads do not match the design load.  These differences lead to energy wastage. Pumping system is one of the systems that always exist in the industry. Improving of pumping system performance is an important step in saving energy. Impeller trimming is one method to improve the performance of the pump system. One of the obstacles in performing the impeller trimming method is to determine the magnitude of the impeller diameter reduction to be performed. Currently, many software developed to improve the performance of pumps and pumping systems. One of the softwares is Pump System Improvement Modeling Tool (PSIM). Imprimer trimming method is one of the features in PSIM. To be optimal in the use of PSIM in the improvement of the pump system it is necessary to conduct a literature study on PSIM to improve the performance of the pump system. In this article has been studied PSIM literature on the process of perfection of centrifugal pump system with impeller trimmer method by taking case study on hot water provider system. The method used in this literature study is by comparing the results of PSIM calculations on case studies with the pump theory of the impeller trimming method. Through this comparison will be known the advantages of PSIM and weaknesses, PSIM calculation margin error compared to the theoretical calculations. By knowing these things then it can be determined the limits of the use of PSIM in the improvement of pump system performance. The result of analysis shows that PSIM trimming impeller calculation is based more on the calculation according to affinity law than any other theory, even in the calculation there is error margin. The tendency of data is the greater the value of the reduction the greater the deviation. If based on the theory then the calculation of PSIM which can be used as a guide in calculating the reduction of diameter is a maximum reduction of 15% or 85% of the original diameter. A larger reduction of the value needs to be re-measured to the characteristics of the pump system.
Investigasi Kapasitas Energi Termal pada Solar Water Heater Berbasis Kalor Laten dengan Variasi Debit Air Nadjib, Muhammad; Caroko, Novi; Thoharudin, Thoharudin; Darmawan, Hanifan
Semesta Teknika Vol 26, No 1 (2023): MEI
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v26i1.18196

Abstract

Material penyimpan kalor pada solar water heater adalah air sebagai kalor sensibel. Kekurangan air adalah densitas energinya rendah. Material lain adalah dari golongan kalor laten (phase change material, PCM) yang memiliki densitas energi tinggi. Unjuk kerja termal SWH tipe aktif dengan tangki horizontal dan memakai PCM jenis paraffin wax terhadap perubahan debit aliran air belum pernah diungkap. Tujuan penelitian ini adalah untuk mendapatkan karakteristik pengaruh perubahan debit air terhadap kapasitas penyimpanan energi termal di tangki. Penelitian menggunakan SWH dengan tangki yang di dalamnya diletakkan kapsul silinder berisi paraffin wax RT55. Termokopel dipasang di sisi air dan PCM. Eksperimen dilakukan secara indoor memakai solar simulator. Debit aliran air yang digunakan adalah 1 lpm, 2 lpm dan 3 lpm. Penelitian ini mendapatkan hasil yaitu kapasitas energi termal untuk debit aliran tersebut masing-masing adalah 10,45 MJ, 10,59 MJ dan 10,71 MJ. Semakin besar debit air maka kapasitas penyimpanan energi termal semakin tinggi.
Co-Authors Agung Santoso, Tito Hadji Ahmad Zaki Aji, Hanung Yudistira Darmawan, Hanifan Fajrin, Qorina Vivianty Fredy Surahmanto Husda, Syamsul Muarif Husda, Syamsul Muarif Kristanto, Jonas Mochamad Syamsiro Mubaroq, Fiqih Anas Muhammad Mufti Azis Muhammad Nadjib, Muhammad Mulyono , Mulyono Safitri, Mutia Sampurna, Hanif Budi Sembiring, Suzad Miko Sigit Surya Bagus Setiawan, Sigit Surya Bagus Sukamta Sukamta Sukamta, Sukamta Sulistiyo, Rizki Surono, Untoro Budi Suyitno - Thoharudin, Thoharudin Tri Wahyono, Tri Wahyudi Wahyudi Wahyudi, Wahyudi