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CHEMICA Jurnal Teknik Kimia
ISSN : 2355875X     EISSN : 23558776     DOI : -
CHEMICA Jurnal Teknik Kimia ISSN, 2355-875X (print) 2355-8776 (online) is a journal that publishes manuscripts or scientific papers in Chemical Engineering. The scope of this journal covers chemical reaction techniques, separation, optimization, process control, process system engineering, waste treatment, food and material technology. Journals are published in print and online twice a year, in June and December by Chemical Engineering Program, Faculty of Industrial Technology, Universitas Ahmad Dahlan Yogyakarta.
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Search results for , issue " Vol 4, No 1 (2017): Juni 2017" : 10 Documents clear
Kombinasi Proses Filtrasi dan Ion Exchange Secara Kontinu pada Pembuatan Aquadm (Demineralized Water) Desmiarti, Reni
CHEMICA: Jurnal Teknik Kimia Vol 4, No 1 (2017): Juni 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (615.399 KB) | DOI: 10.26555/chemica.v4i1.6730

Abstract

Demineralized water is water free of dissolved mineral. Combination of filtration and ion exchanger processes were studied to treat demineralized water. The source of raw water is from Mountain Talang in District Solok. The study was conducted to investigate the effect of the amount of resin cartridge to electric conductivity (EC), pH and total dissolved solid (TDS).  The flow rate was set at 50 ml/menit. The results showed that the number of resin cartridge 4 (2 anion and cation 2), the removal efficiency of EC and TDS achieved at 89.09% and 90.91%, respectively. As for the number of cartridges 6 (3 anions and cations 3), the removal efficiency of EC and TDS obtained at 95.45% and 96.36%, respectively.  In addition, the effect of flow rate was also studied using cartridges resin 6 (3 anions and cations 3). Demineralized water has met the quality standard with a value of 0 ppm TDS, EC 0 μS / cm, pH 7.5. This studies shown that the combination of filtration and ion exchange filtration process can use effectively to treat demineralized water with high quality standard.
Pengolahan Limbah Minyak Pelumas dengan Menggunakan Metode Elektrokoagulasi Nimah, Lailan; Fyanidah, Fauzan; Maulana, Muhammad Danan
CHEMICA: Jurnal Teknik Kimia Vol 4, No 1 (2017): Juni 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (501.811 KB) | DOI: 10.26555/chemica.v4i1.6645

Abstract

Most of users of lubricants are motor vehicles plus lubricating oil used for factory machinery. The amount of lubricating oil used will produce waste. Waste generated by the lubricant is included in the B3 waste which needs special handling. In this study used electrocoagulation because this method is easy and not too dangerous because there is no addition of chemicals. The objective of this study was to study electrocoagulation method using aluminum and steinless steel electrodes and the effect of time to decrease of Fe metal content. This electrocoagulation treats lubricating oil waste electrically so that the ions present in the waste are absorbed by the binding coagulant that is released electrode so that there will be bonds between metal ions with coagulant. The first reactor penetration procedure is filled with a lubricating oil waste containing Fe up to 1000mL. The anode (aluminum) is connected to the positive pole, whereas the cathode (stainless steel) is connected to the negative pole of the current rectifier (adapter). Voltage variations used are 12 volts, 18 volts and 24 volts and 5A current strength with stirring duration of each variation for 2 hours, 2.5 hours and 3 hours. Electrocoagulation result with 24 volt voltage with time of 3 hours for big plate is 26,44 is decrease of Fe content of biggest metal.
Pupuk Organik dari Limbah Pabrik Gula Madukismo dengan Starter Mikrobia Pengurai Untuk Menambah Kandungan N, P, K Harjanti, Ratna Sri
CHEMICA: Jurnal Teknik Kimia Vol 4, No 1 (2017): Juni 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (363.184 KB) | DOI: 10.26555/chemica.v4i1.6107

Abstract

Abstrak Blotong is sugar mill waste slude in the form of dark, often dumped, causing pollution and odor. Blotong produce about 3,8 % of cane milled by a sugar factory unit. While vinasse is waste water generated from the process of making alcohol. In the process of making one liter of alcohol will produce as much as 13 liters of vinasse. Vinasse contain many elements K, while blotong contains a lot of elements of N, P, dan Ca. This allows for composting blotong with the addition of vinasse to produce organis fertilizer. Blotong and vinasse may be seen in the PG Madukismo.Organic fertilizer through composting mixture of blotong and vinasse using microbial starter EM-4 and X-Compost can be done easily in the home environment. To determine the optimum process conditions to produce organic fertilizer, need to be varied ratio of blotong and vinasse. Composting reaction carried out for thirty days with observed in temperature and pH. Further analysis of N, P, K and C/N ratio.Based on the results obtained, the use of starter microbes X compost more prospective than using starter microbes EM-4. The compost produced by the starter microbes X-compost contains N, P, K which is much higher than the compost produced by the starter micobes EM-4. As for the addition of vinasse, will give optimum results in the addition of vinasse 25% of the weigth of blotong. Keywords: blotong, vinasse, compost, microbe
Penerapan Metode Taguchi pada Perancangan Eksperimen Beton Geopolimer Berbasis Abu Layang anggarini, ufafa; Kosada, Claudia; Sukmana, Ndaru Candra
CHEMICA: Jurnal Teknik Kimia Vol 4, No 1 (2017): Juni 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (493.399 KB) | DOI: 10.26555/chemica.v4i1.6776

Abstract

PT Petrokima Gresik produces fly ash from coal burning about 8048,89 tons in 2015. In general, one ton of coal burning can produce around 0.15 to 0.17 tons of fly ash waste. Fly ash waste can be utilized as a mixture where the main elements of fly ash are aluminum and silica, fulfilling criteria as the material having cement and geopolymer properties. Geopolymer preparation can be done by the sol-gel method at low temperature, where the emission of CO2 gas produced is a minimum amount. The problem faced is finding the right composition of geopolymer so that it produces the maximum compressive strength. One way is by designing a Taguchi experiment. The choice of the Taguchi method is based on the advantages of this method that can combine experimental results through controlled factors and optimal levels so it can achieve the maximum compressive strength of geopolymer. This research used 3 levels (-1,0,1) and 4 factors of fly ash, the solid/liquid ratio (SL), the molarity of NaOH (A), Sand/pasta geopolymer ratio (P/PG). Anova test showed significant effect on compressive strength of fly ash, S / L and A with value of 12,27> 2,90; 61,12> 2,90; 19,477> 2,90. While the value for P / PG is 1.92 <2.90 where the value of F-statistic is less than F table which means P / PG does not significantly affect the compressive strength of Geopolymer. With S/N higher is better to know the optimum composition of fly ash, S / L, A and P / PG equal to: 370 gram; 2.33 (70:30); 9 Molar, and 1.5. The prediction of Geopolymer maximum compressive strength with Taguchi method was obtained 18,71 Mpa. Keywords:  Fly ash, Optimation, Taguchi, Geopolymer
Penentuan Komposisi Optimum Pembuatan Paving Block Berbahan Pasir Silika Proses Sand Blasting dengan Metode Taguchi sukmana, ndaru candra; Prasetyono, Dedy Eko; anggraini, ufafa
CHEMICA: Jurnal Teknik Kimia Vol 4, No 1 (2017): Juni 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (501.079 KB) | DOI: 10.26555/chemica.v4i1.6797

Abstract

Sandblasting process by using silica sand will produce waste of silica sand at least 70%. Engineering Procurement and Construction (EPC) Industry produces a waste of untreated and unused sandblasting sand silica from sandblasting process. Silica sand waste sandblasting process is a dangerous waste. On the other hand development in Indonesia will increase. It takes a large amount of raw materials to meet development needs. One of the raw materials is paving block. Silica sand waste can be utilized as an alternative material for making paving block. In this research, the experiment design used is Taguchi method. The Taguchi method is used to determine the effect of silica sand waste and the optimum composition on the paving block to produce maximum compressive strength value. The results of this study indicate that silica sand waste hasn’t an significant effect on the compressive strength of paving block and the optimum composition is 1.1 kg of cement, 2.5 kg of sand, and 2 kg of silica sand which produce a compressive strength of 21,56 MPa. The compressive strength is compliant with paving block SNI-03-0691-1996 on the classification of B quality that is with a minimum compressive strength of 17.0 MPa.Keywords:  sandblasting wate, paving block, taguchi method
Pupuk Organik dari Limbah Pabrik Gula Madukismo dengan Starter Mikrobia Pengurai Untuk Menambah Kandungan N, P, K Harjanti, Ratna Sri
CHEMICA: Jurnal Teknik Kimia Vol 4, No 1 (2017): Juni 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (363.184 KB) | DOI: 10.26555/chemica.v4i1.6107

Abstract

Abstrak Blotong is sugar mill waste slude in the form of dark, often dumped, causing pollution and odor. Blotong produce about 3,8 % of cane milled by a sugar factory unit. While vinasse is waste water generated from the process of making alcohol. In the process of making one liter of alcohol will produce as much as 13 liters of vinasse. Vinasse contain many elements K, while blotong contains a lot of elements of N, P, dan Ca. This allows for composting blotong with the addition of vinasse to produce organis fertilizer. Blotong and vinasse may be seen in the PG Madukismo.Organic fertilizer through composting mixture of blotong and vinasse using microbial starter EM-4 and X-Compost can be done easily in the home environment. To determine the optimum process conditions to produce organic fertilizer, need to be varied ratio of blotong and vinasse. Composting reaction carried out for thirty days with observed in temperature and pH. Further analysis of N, P, K and C/N ratio.Based on the results obtained, the use of starter microbes X compost more prospective than using starter microbes EM-4. The compost produced by the starter microbes X-compost contains N, P, K which is much higher than the compost produced by the starter micobes EM-4. As for the addition of vinasse, will give optimum results in the addition of vinasse 25% of the weigth of blotong. Keywords: blotong, vinasse, compost, microbe
Penerapan Metode Taguchi pada Perancangan Eksperimen Beton Geopolimer Berbasis Abu Layang anggarini, ufafa; Kosada, Claudia; Sukmana, Ndaru Candra
CHEMICA: Jurnal Teknik Kimia Vol 4, No 1 (2017): Juni 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (493.399 KB) | DOI: 10.26555/chemica.v4i1.6776

Abstract

PT Petrokima Gresik produces fly ash from coal burning about 8048,89 tons in 2015. In general, one ton of coal burning can produce around 0.15 to 0.17 tons of fly ash waste. Fly ash waste can be utilized as a mixture where the main elements of fly ash are aluminum and silica, fulfilling criteria as the material having cement and geopolymer properties. Geopolymer preparation can be done by the sol-gel method at low temperature, where the emission of CO2 gas produced is a minimum amount. The problem faced is finding the right composition of geopolymer so that it produces the maximum compressive strength. One way is by designing a Taguchi experiment. The choice of the Taguchi method is based on the advantages of this method that can combine experimental results through controlled factors and optimal levels so it can achieve the maximum compressive strength of geopolymer. This research used 3 levels (-1,0,1) and 4 factors of fly ash, the solid/liquid ratio (SL), the molarity of NaOH (A), Sand/pasta geopolymer ratio (P/PG). Anova test showed significant effect on compressive strength of fly ash, S / L and A with value of 12,27> 2,90; 61,12> 2,90; 19,477> 2,90. While the value for P / PG is 1.92 <2.90 where the value of F-statistic is less than F table which means P / PG does not significantly affect the compressive strength of Geopolymer. With S/N higher is better to know the optimum composition of fly ash, S / L, A and P / PG equal to: 370 gram; 2.33 (70:30); 9 Molar, and 1.5. The prediction of Geopolymer maximum compressive strength with Taguchi method was obtained 18,71 Mpa. Keywords:  Fly ash, Optimation, Taguchi, Geopolymer
Penentuan Komposisi Optimum Pembuatan Paving Block Berbahan Pasir Silika Proses Sand Blasting dengan Metode Taguchi sukmana, ndaru candra; Prasetyono, Dedy Eko; anggraini, ufafa
CHEMICA: Jurnal Teknik Kimia Vol 4, No 1 (2017): Juni 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (501.079 KB) | DOI: 10.26555/chemica.v4i1.6797

Abstract

Sandblasting process by using silica sand will produce waste of silica sand at least 70%. Engineering Procurement and Construction (EPC) Industry produces a waste of untreated and unused sandblasting sand silica from sandblasting process. Silica sand waste sandblasting process is a dangerous waste. On the other hand development in Indonesia will increase. It takes a large amount of raw materials to meet development needs. One of the raw materials is paving block. Silica sand waste can be utilized as an alternative material for making paving block. In this research, the experiment design used is Taguchi method. The Taguchi method is used to determine the effect of silica sand waste and the optimum composition on the paving block to produce maximum compressive strength value. The results of this study indicate that silica sand waste hasn’t an significant effect on the compressive strength of paving block and the optimum composition is 1.1 kg of cement, 2.5 kg of sand, and 2 kg of silica sand which produce a compressive strength of 21,56 MPa. The compressive strength is compliant with paving block SNI-03-0691-1996 on the classification of B quality that is with a minimum compressive strength of 17.0 MPa.Keywords:  sandblasting wate, paving block, taguchi method
Kombinasi Proses Filtrasi dan Ion Exchange Secara Kontinu pada Pembuatan Aquadm (Demineralized Water) Desmiarti, Reni
CHEMICA: Jurnal Teknik Kimia Vol 4, No 1 (2017): Juni 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (615.399 KB) | DOI: 10.26555/chemica.v4i1.6730

Abstract

Demineralized water is water free of dissolved mineral. Combination of filtration and ion exchanger processes were studied to treat demineralized water. The source of raw water is from Mountain Talang in District Solok. The study was conducted to investigate the effect of the amount of resin cartridge to electric conductivity (EC), pH and total dissolved solid (TDS).  The flow rate was set at 50 ml/menit. The results showed that the number of resin cartridge 4 (2 anion and cation 2), the removal efficiency of EC and TDS achieved at 89.09% and 90.91%, respectively. As for the number of cartridges 6 (3 anions and cations 3), the removal efficiency of EC and TDS obtained at 95.45% and 96.36%, respectively.  In addition, the effect of flow rate was also studied using cartridges resin 6 (3 anions and cations 3). Demineralized water has met the quality standard with a value of 0 ppm TDS, EC 0 μS / cm, pH 7.5. This studies shown that the combination of filtration and ion exchange filtration process can use effectively to treat demineralized water with high quality standard.
Pengolahan Limbah Minyak Pelumas dengan Menggunakan Metode Elektrokoagulasi Ni'mah, Lailan; Fyanidah, Fauzan; Maulana, Muhammad Danan
CHEMICA: Jurnal Teknik Kimia Vol 4, No 1 (2017): Juni 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (501.811 KB) | DOI: 10.26555/chemica.v4i1.6645

Abstract

Most of users of lubricants are motor vehicles plus lubricating oil used for factory machinery. The amount of lubricating oil used will produce waste. Waste generated by the lubricant is included in the B3 waste which needs special handling. In this study used electrocoagulation because this method is easy and not too dangerous because there is no addition of chemicals. The objective of this study was to study electrocoagulation method using aluminum and steinless steel electrodes and the effect of time to decrease of Fe metal content. This electrocoagulation treats lubricating oil waste electrically so that the ions present in the waste are absorbed by the binding coagulant that is released electrode so that there will be bonds between metal ions with coagulant. The first reactor penetration procedure is filled with a lubricating oil waste containing Fe up to 1000mL. The anode (aluminum) is connected to the positive pole, whereas the cathode (stainless steel) is connected to the negative pole of the current rectifier (adapter). Voltage variations used are 12 volts, 18 volts and 24 volts and 5A current strength with stirring duration of each variation for 2 hours, 2.5 hours and 3 hours. Electrocoagulation result with 24 volt voltage with time of 3 hours for big plate is 26,44 is decrease of Fe content of biggest metal.

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