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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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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 Â hard color, and even toxity Â (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. Â 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 Âº 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 ËC 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 adsorbedÂ 68.59% Cd, 16.65% Cr, and 100% Pb, mesh 35 adsorb Â 76.25% Cd, 37.55% Cr and Pb at 100%, while mesh 50 adsorb 81.61% Cd, 58,33% Cr, and 100% Â 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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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 itâs 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 thanÂ 0,0093 mg/L, while Cr content decrease from 2,03 mg/l to 0,4205 mg/l.

Kaji Eksperimental Pengaruh Variasi Diameter Nozzle Throat Terhadap Thrust Pada Motor Roket Propellant Padat Caroko, Novi; Setiawan, Sigit Surya Bagus
Media Mesin Vol 15, No 2 (2014)
Publisher : Universitas Muhammadiyah Surakarta

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Gaya dorong motor roket propellant padat tergantung dari ketepatan campuran bahan bakar, diameter core hole dan diameter nosel. Untuk mengetahui pengaruh variasi ukuran zozzle throat terhadap gaya dorong yang dihasilkan, maka perlu dilakukan pengujian motor roket propellant padat dengan variasi diameter nozzle throat 8, 10 dan 12,5 mm. Pengambilan data dilakukan dengan memposisikan motor roket agar mengarah pada alat pengukur gaya. Penekanan alat pengukur gaya terjadi setelah propellant padat terbakar dan menghasilkan gas pembakaran yang keluar melalui nosel. Berdasarkan hasil pengujian dapat diketahui bahwa semakin kesil penggunaan diameter nozzle throat, maka gaya dorong yang idcapai akan semakin tinggi dan laju penurunan massa akan semakin besar.

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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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.Â Â Â

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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In the industrial world often encountered actual loads do not match the design load.Â 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.

PERANCANGAN ROLLER SPINNING SEBAGAI MESIN PEMBUAT PANCI DARI PLAT ALUMINIUM Thoharudin, Thoharudin; Caroko, Novi; Wahyudi, Wahyudi; Sembiring, Suzad Miko; Aji, Hanung Yudistira
JMPM : Jurnal Material Dan Proses Manufaktur Vol 1, No 2 (2017): DESEMBER 2017
Publisher : JMPM : Jurnal Material Dan Proses Manufaktur

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Makalah ini menyajikan proses perancangan mesin roller spinning yang digunakan untuk membuat panci dari plat aluminium. Proses perancangan digunakan untuk menentukan dimensi dari komponen penting dari mesin roller spinning dan kebutuhan daya penggeraknya. Proses perancangan melibatkan persamaan-persamaan yang diambil dari beberapa referensi. Hasil dari perancangan ini menampilkan bahwa kebutuhan ukuran baut sambungan flange poros-mandrel minimal berukuran M6 kelas 4.6 berjumlah 8 buah, diameter poros penggerak minimal sebesar 40,54 mm terbuat dari bahan baka AISI 6150. Kebutuhan daya pengerolan bervariasi tergantung dari ketebalan plat dan kecepatan putar motor yang digunakan, semakin tebal plat dan kecepatan motor maka penggunaan daya penggerak semakin besar. Untuk kebutuhan industri mikro disarankan kecepatan putar maksimum sebesar 500 rpm agar kebutuhan daya untuk pengerolan plat tebal 1,5 mm cukup dengan motor listrik berkapasitas 1 HP.

Unjuk Kerja Motor Bensin Berbahan Bakar Campuran Pertalite dan Pyrolytic Oil dari Pirolisis Kantong Plastik Berkatalis CaO Caroko, Novi; Mubaroq, Fiqih Anas; Agung Santoso, Tito Hadji; Thoharudin, Thoharudin
JMPM : Jurnal Material dan Proses Manufaktur Vol 2, No 2 (2018): DESEMBER 2018
Publisher : JMPM : Jurnal Material dan Proses Manufaktur

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AbstrakPenelitian ini bertujuan menguji secara eksperimental pengaruh penggunaan campuran minyak pirolisis dan pertalite pada torsi, tenaga, dan konsumsi bahan bakar motor bensin Honda Beat 110cc. Minyak pirolisis dicampur dengan pertalite dengan persentase volume minyak pirolisis: 0%, 5%, 10%, 20%, dan 30%. Metode yang digunakan dalam penelitian ini adalah menggunakan dynotest tool kit dan fuel consumtion test. Parameter yang diukur adalah nilai torsi, daya, dan konsumsi bahan bakar. Hasil penelitian menunjukkan bahwa pertalite murni menghasilkan torsi dan daya tertinggi dibandingkan dengan variasi campuran pertalite dengan minyak pirolisis lainnya. Hal ini dimungkinkan karena nilai viskositas pertalite lebih rendah dibandingkan dengan variasi lainnya. Konsumsi bahan bakar terendah terdapat pada variasi 70% volume pertalite dan 30% volume minyak pirolisis yang menghasilkan konsumsi bahan bakar sebesar 41,66 km/I.AbstractThis study aims to experimentally test the effect of using a mixture of pyrolysis oil and Pertalite on torque, power and fuel consumption of the 110cc Honda Beat gasoline motor. Pyrolysis oil is mixed with pertalite with the percentage volume of pyrolysis oil: 0%, 5%, 10%, 20%, and 30%. The method used in this study is to use the dynotest tool kit and fuel consumption test. The parameters measured are the value of torque, power and fuel consumption. The results showed that pure pertalite produced the highest torque and power compared to variations of the pertalite mixture with other pyrolysis oils. This is possible because the pertalite viscosity value is lower compared to other variations. The lowest fuel consumption is found in 70% volume of pertalite and 30% volume of pyrolysis oil which results in fuel consumption of 41.66 km / I.

Kaji Eksperimental Pengaruh Variasi Diameter Nozzle Throat Terhadap Thrust Pada Motor Roket Propellant Padat Caroko, Novi; Setiawan, Sigit Surya Bagus
Media Mesin: Majalah Teknik Mesin Vol 15, No 2 (2014)
Publisher : Program Studi Teknik Mesin, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v15i2.2069

Gaya dorong motor roket propellant padat tergantung dari ketepatan campuran bahan bakar, diameter core hole dan diameter nosel. Untuk mengetahui pengaruh variasi ukuran zozzle throat terhadap gaya dorong yang dihasilkan, maka perlu dilakukan pengujian motor roket propellant padat dengan variasi diameter nozzle throat 8, 10 dan 12,5 mm. Pengambilan data dilakukan dengan memposisikan motor roket agar mengarah pada alat pengukur gaya. Penekanan alat pengukur gaya terjadi setelah propellant padat terbakar dan menghasilkan gas pembakaran yang keluar melalui nosel. Berdasarkan hasil pengujian dapat diketahui bahwa semakin kesil penggunaan diameter nozzle throat, maka gaya dorong yang idcapai akan semakin tinggi dan laju penurunan massa akan semakin besar.

UNJUK KERJA GENERATOR LISTRIK BERBAHAN BAKAR BIOGAS Caroko, Novi; Surahmanto, Fredy; Sulistiyo, Rizki
JMPM : Jurnal Material dan Proses Manufaktur Vol 3, No 1 (2019): JUNI 2019
Publisher : JMPM : Jurnal Material dan Proses Manufaktur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.3137

AbstrakPengujian unjuk kerja generator berbahan bakar biogas belum banyak dilakukan. Penelitian ini bertujuan untuk mengetahui unjuk kerja genset berbahan bakar biogas. Bahan baku biogas yang digunakan pada penelitian ini berasal dari kotoran sapi. Pengambilan biogas dilakukan di kelompok ternak sapi Pandan Mulyo, Bantul, Yogyakarta. Generator yang digunakan berkapasitas daya 2.200-Watt dan variasi pembebanan 660, 720, 780, 840, dan 900 Wat. Parameter yang diambil berupa tegangan, arus, putaran mesin, dan debit biogas. Hasil penelitian menunjukkan daya keluaran genset dari 5 variasi pembebanan yaitu 660, 720, 780, 840, dan 900 Watt berturut-turut adalah 599,4; 651; 681,6; 676,5; dan 668,5 Watt. Nilai konsumsi bahan bakar dari 5 variasi pembebanan yaitu 0,645; 0,652; 0,673; 0,680; dan 0,727 kg/jam. Dari 5 variasi pembebanan menunjukkan bahwa unjuk kerja paling optimal dari genset berbahan bakar biogas ini berada pada tingkat pembebanan 660 Watt dengan daya keluaran yang dihasilkan sebesar 599,4 Watt.AbstrakThe performance testing of biogas-fueled generators has not been carried out much. This study aims to determine the performance of biogas fueled generators. The biogas raw material used in this study was cow dung. Biogas extraction was carried out in the Pandan Mulyo cattle group, Bantul, Yogyakarta. The generator used is 2,200-Watt power capacity and variations in loading 660, 720, 780, 840, and 900 Watt. The parameters are taken in the form of voltage, current, engine rotation, and flow of biogas. The results showed the generator output power of 5 experiment variations, 660, 720, 780, 840, and 900 Watt, respectively, were 599.4; 651; 681.6; 676.5; and 668.5 Watt. The fuel consumption of 5 variations are 0.645; 0.652; 0.673; 0.680; and 0.727 kg / hour. From all variations, showed that the optimal performance of the biogas fueled generator is at 660 Watt with the output power of 599.4 Watt.

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

In the industrial world often encountered actual loads do not match the design load.Â 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.

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