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Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Published by Politeknik ATK Yogyakarta
ISSN : 14117703     EISSN : 27462625     DOI : https://doi.org/10.58533/8esa3597
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Berkala Penelitian Teknologi Kulit, Sepatu dan produk Kulit is a peer-reviewed, open-access journal that publishes original research articles, review articles, as well as short communication in all areas of basic and applied chemistry. Berkala Penelitian Teknologi Kulit, Sepatu dan produk Kulit covers the following topics. Arts Chemical Engineering, Chemistry and Bioengineering Engineering Industrial and Manufacturing Engineering Social Science The submitted manuscript should have relevance with Arts, Chemical Engineering, Chemistry and Bioengineering, Industrial and Manufacturing Engineering, and Social Science.
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Articles 85 Documents
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ANTIBACTERIAL ACTIVITY OF SAMBILOTO (ANDROGRAPHIS PANICULATA, NEES) ETHANOL EXTRACT AGAINST STAPHYLOCOCCUS AUREUS Naimah Putri; Latifah Listyalina
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 1 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/852kk888

Abstract

The use of traditional plants can be used as natural antibacterial in preventing and treating infectious wound diseases caused by Staphylococcus aureus. One of the plants that can be used is bitter leaf. Sambiloto leaves contain several substances that can be used as antibacterial including alkaloids, flavonoids, saponins and tannins. The purpose of this study were to determine the lowest concentration of bitter leaf extract (Andrographis paniculata, Nees) which can inhibit and kill Staphylococcus aureus field isolates in vitro by dilution method. This research was expected to provide information on the benefits of bitter leaf as a drug that can be used in the treatment of infections against Staphylococcus aureus. This study used the dilution method which included Minimum Inhibitory Concentration (MIC) and Minimum Bacteriocid Concentration (MBC). The test results showed that bitter leaf extract (Andrographis paniculata, Nees) had the ability to inhibit the growth of Staphylococcus aureus starting at a concentration of 25% and had the ability to kill Staphylococcus aureus starting at a concentration of 50%.
IMPLEMENTATION ANALYSIS OF OCCUPATIONAL SAFETY AND HEALTH IN THE OPERATING PROCESS A CRUSHER MACHINE AT THE PLASTIC WORKSHOP OF POLYTECHNIC ATK YOGYAKARTA Muhammad Ikhwan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 1 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/wkhvbt87

Abstract

The Plastic Laboratory is one of the Laboratories of the Rubber and Plastic Processing Technology Study Program located at the Polytechnic ATK Yogyakarta. Plastic Workshop has several machines including Injection Molding machine, Blow Molding machine, Crusher machine and Mixer machine. In the operation of the crusher machine, there is a danger of microplastics produced as a by-product of the plastic enumeration process where the raw material is in the form of a practicum reject product on the Injection Molding and Blow Molding machines. Microplastics are types of plastic waste that are smaller than 5 mm in size and are grouped into 2 types, namely primary and secondary microplastics. The transfer of microplastics from the environment into the human body can occur both primary (directly from the environment into the human body in inorganic form) and secondaryly (entering through the food chain, by consuming organisms polluted with microplastics). Primary transfer can occur through the digestive (digesti) and respiratory (inhalation) systems. Microplastics can enter the human body primarily through inhalation, because microplastics can float in the air. From the hierarchy of hazard control, Administrative Control and the application of Personal Protective Equipment is the hierarchy that best suits the conditions and needs in the plastic laboratory. Where with Administrative Control, which ensures that all people in the laboratory and practice who operate crusher machines are required to use Personal Protective Equipment, the impact of microplastic hazards can be minimized properly. Another thing to note is that the provision of engineering gloves, respirator masks and earmuffs should be done periodically and in sufficient quantities.
OPTIMIZATION OF POLY ALUMUNIUM CLORIDE (PAC) DOSAGE FOR TANNERY WASTE TREATMENT IN COAGULATION-FLOCULATION PROCESS Nanda Brilian Tantri; Swatika Juhana; Ragil Yuliatmo
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 1 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/cysq2360

Abstract

The purpose of this study was to determine the optimum dose of PAC coagulant in the treatment of tannery waste in the coagulation-flocculation process. The research was conducted using the jar test method to treat leather tanning wastewater by coagulation-flocculation. Coagulation was carried out with various doses of PAC coagulant 1%, 2%, 3%, 4%, and 5% each of which 5 mL was put into a beaker containing 300 mL of tannery wastewater. Coagulation was carried out with rapid stirring at 100 rpm for 1 minute. Then flocculated using 1% basefloc polyelectrolyte 3 mL each. Flocculation with slow stirring at 25 rpm for 15 minutes. The results of the jar test were measured for turbidity, pH, and the type of floc. The results showed that the optimum dose of PAC coagulant to treat leather tanning waste was 5 mL PAC 2% for a waste volume of 300 mL, at pH 7. This result can be converted into grams of PAC/waste volume, namely 0.1 grams of PAC/300 mL of waste or 0.33 grams of PAC/1L of leather tanning liquid waste.
PHYSICAL AND CHEMICAL CHARACTERISTICS OF BOVINE HIDE GELATIN WITH THE TYPE AND CONCENTRATION OF ACID AS A PRE -TREATMENT SOLUTION Dwi Wulandari; R.L.M. Satrio Ari Wibowo; Tantri Fauziah; A. Z.Tawarniate
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 1 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/2dk4e462

Abstract

The aim of the research was to study the physical and chemical properties of bovine skin gelatin soaked in different types and concentrations of acids and to obtain the types and concentrations of acids that could produce good quality gelatin. The materials used in the study were 10 kg of PO fresh cowhide, acetic acid, HCl and lime citric acid. The treatment applied was the percentage of acid, namely 3%, 4% and 5%. Parameters observed included yield, moisture content, ash content, pH, fat content, protein content, gel strength and viscosity. Statistical analysis was used with a completely randomized design with factorial pattern with 2 repetitions, as the first level is the type of acid, namely CH3COOH, HCL and C6H8O7 and the second level is the percentage of acid: 3%, 4%, 5%. The data obtained were analyzed using ANOVA (Co Variance Analysis) based on a completely randomized factorial design. If there is a difference, proceed with Duncan's multiple area test. The interaction between the type of acid and the percentage of acid affects all parameters. Treatment with HCl gave the highest yield of 18.05% and the pH closest to normal was 4.62. Acetic acid treatment resulted in the highest protein content, gel strength and viscosity (95.94%, 222.01 Bloom, 10.44 cP). Treatment with lime citric acid obtained the lowest ash content of 0.36%.
DIFFERENCES IN PERCENTAGE OF CASTOR OIL ON WATER ABSORPTION AND SOFTNESS OF RABBIT ZEEMLER SKIN Titik Anggraini; Tutik Maryati
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 1 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/6p0rnf94

Abstract

This study aims to evaluate the flexibility and water absorption of the skin of oil-tanned rabbits / zeemler with different percentages of castor oil. A total of 9 pieces of rabbit skin were randomly divided into 3 treatments with 3 replications. The treatment given was the percentage of castor oil (15%), medium (20%) and high (25%). Variables observed included weakness and water absorption. The data collected was analyzed by analysis of variance followed by Duncan's New Multiple Range Test. The results showed that the suppleness of oil tanned leather with the percentage of 15% and 25% castor oil was higher (P>0.05) than the percentage of 20%. The percentage of 15% castor oil resulted in a higher water absorption than the percentages of 20% and 25%. It was concluded that the quality of the zeemler rabbit skin tanned with castor oil met the Indonesian National Standard No 06-1752-1990. The use of various castor oil had no effect on the results of the Zeemler skin moisture absorption and skin elasticity tests.
SYNTHESIS KALIUM ALUMUNIUM SULPHATE (ALUM) FROM ALUMUNIUM FOIL WASTE USING KOH AND H2SO4 Atiqa Rahmawati
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 1 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/f4h19h54

Abstract

The increase in the culinary industry certainly must be balanced with the packaging waste generated. The waste from aluminum foil is one of the wastes produced. Over 8 tons of aluminum foil waste are generated each month in East Java. Waste that has been piled up is only given to third parties. It takes about 400 years for aluminum foil to breakdown and decompose in the soil. Aluminum foil waste can generate environmental pollution. As waste pollution increases, alternatives are needed to convert waste into useful materials. Aluminum foil can be utilized as a raw material for the production of potassium aluminum sulfate due to its high aluminum content. The objective of this study is to utilize aluminum waste into potassium aluminum sulfate. The concentrations of KOH and H2SO4 are the two variables combined. In this study, the yield value, pH analysis, melting point, and Al2O3 content of alum will be determined. The results showed that 2 M KOH and 4.5 M H2SO4 had the highest yield of 88.3580, pH 3,08; melting point 92 °C; and Al2O3 concentration 15,5%. Potassium aluminum sulfate performed physical analysis, including analyses of pH, melting point, and Al2O3 concentration. Alum has a pH of about 3, and its melting point is between 92 and 93 °C, while the Al2O3 content ranges between 9 and 11%. Kalium alumnium sulfate meets the SNI 0032:2011 standards for physical pH and melting point analysis. However, the Al2O3 content does not meet to SNI 0032:2011.
APPLICATION EFFECT OF HAND MIXER AND OVERHEAD MIXER ON MIXING PERFORMANCE FOR THE MANUFACTURE OF ARTIFICIAL LEATHER Dewi Nurhidayati
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 1 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/3jerca37

Abstract

The mixing process is necessary for the manufacture of a product, one of which is the manufacturing process of artificial leather. The mixing process in the manufacture of artificial leather aims to mix raw materials and additives such as fillers, stabilizers, plasticizers, and others. The mixing process is carried out using a mixer. This study aims to determine the effect of using mixers that have different specifications. The mixer used is the Hand Mixer Miyako SM-625 with the Overhead Mixer IK RW 20. Both of these mixers have differences in speed and type of agitator.From the results of organoleptic test, both of these mixers there was no difference. But the results of the physical test showed that the values of tensile strength, elongation, and tear strength were higher when using the IK RW 20 Overhead Mixer. This indicated that both mixers could be used in the manufacture of artificial leather, but to obtain measurable test results, using the IK RW 20 Overhead Mixer was recommended, seen from the difference in each of the physical test parameters.
UTILIZATION OF AROMATIC SULPHONES IN THE UPPER SHOES LEATHER TANNING PROCESS Sofwan Siddiq Abdullah; Kuntoro; Fadzkurisma Robbika; Thoyib Rohman Hakim
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 2 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/xcppm319

Abstract

Technology of leather tannery is influenced by laws and developments in technology, both domestically and internationally. Current research has a major focus on discovering new process technologies and materials that make the leather processing technology more optimal and environmentally friendly. Currently, most of the leather tanning processes in Indonesia still have normative stages, which consist of beam house operation, tanning, post-tanning (neutralization, retanning, dyeing, fatliquoring) and finishing stages. The purpose of this study is to alter the post-tanning procedure for upper shoes by using aromatic sulfones. By using aromatic sulfones, leather can be tanned without the requirement for neutralization. The results of this study are expected to educate tanneries and give them another choice for performing tanning techniques that are more efficient, more reasonably priced, and meet standards for the quality of finished leather. With the addition of aromatic sulfones, wet blue goat skin post-tanning can be finished in 225 minutes (3 hours 45 minutes), or roughly 21.43% of the typical processing time. This process modification can both speed up the tanning process and consume less water because no fresh water is needed during the post-tanning phase. Water savings in the post-tanning process can reach 400% of the total water used. With these advantages, it is believed that the tanning process for leather would become more effective and affordable. Furthermore, by using less water during the post-tanning process, liquid waste can also be decreased. In terms of organoleptics and mechanics, the rubbing resistance of post-tanning leather with with the addition of aromatic sulfones meets the requirements/standards for upper shoes.
OPTIMIZATION ADSORPTION OF HEXAVALEN CHROMIUM (CR-VI) IN ACTIVATED CARBON (MICROWAVE-ASSISTED ZNCL2 CHEMICAL-ACTIVATION) USING TAGUCHI METHOD Atiqa Rahmawati; Fadzkurisma Robbika; Yuafni
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 2 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/s6prsw97

Abstract

The issue of heavy metal pollution is a significant concern in the environmental. Hexavalent chromium (Cr(VI)) is hazardous heavy metal when it is discharged and expands within ecosystem. Cr(VI) is a hazardous compound that high susceptibility to oxidation and mutagenic. The tannery industry generates hexavalent chromium in its liquid waste. Managing Cr(VI) liquid waste could use the adsorption technique with activated carbon. In this study the activation of activated carbon using microwave-assisted ZnCl2 chemical activation. The activated carbon used for adsorbing the Cr(VI). The objective of this study was to ascertain the optimum parameters for the adsorption of Cr(VI) utilizing activated carbon. The optimization method is Taguchi, which incorporates three factors: A (pH), B (activated carbon dosage), and C (agitation). The result of optimization is pH 2; 0,4 g activated carbon dosage, and agitation 20 rpm, which the optimal response was 16.7498 mg/L. The analysis using the desirability obtained desirability value of 1. The ANOVA results indicate that the pH significant on the response. The adjusted R-square is 0.9667 and predicted R-square is 0.8668. It can be concluded that the model and actual conditions has slighly discrepancies. Then, the regression equation from the model can be estimate the actual value.
DISPERSING AGENTS WASTEWATER QUALITY FROM LATEX GLOVES MANUFACTURING BY TREATMENT USING Al2(SO4)3 AND PAC COAGULANT Wahyu Ratnaningsih; Cahya Widiyati
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 2 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/hcpgfk90

Abstract

Waste is a residual result of a process that cannot be reused. The rubber industry is one of the waste-producing industries that if not managed properly, will cause environmental pollution. One of the rubber industries is the latex glove industry, which uses raw materials in the form of latex and chemicals as dispersing agents. Dispersing agents that already expired cannot be reused, so they need to be processed before being discharged into the environment. One of the methods used for treating this wastewater is the coagulation-flocculation method. This research is aimed to conduct the treatment of dispersing agents wastewater from latex glove manufacturing by the coagulation-flocculation method using coagulants to reduce the level of turbidity and COD concentration. The concentrations of Al2(SO4)3 and PAC coagulants used were 1.33 g/L, 1.67 g/L, and 2 g/L, respectively, with rapid stirring at 120 rpm for 2 minutes. The flocculant concentration used was 0.33 g/L, with rapid stirring at 25 rpm for 15 minutes. The results showed that Al2(SO4)3 coagulant was better at reducing turbidity levels up to 97.86% and COD concentrations up to 90.24% in the dispersing agents wastewater. Based on this study, the recommended dose of Al2(SO4)3 coagulant is 1.67 g/L. At this dose, there was a decrease in turbidity levels from 816 NTU to 17.43 NTU and a decrease in COD levels from 328 mg/L to 32 mg/L.

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