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All Journal Sinergitas Multidisiplin Ilmu Pengetahuan dan Teknologi (SMIPT) Paulus Chem Engineering Journal
Lydia Melawaty
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science

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Journal : Paulus Chem Engineering Journal

 1 
Metode Elektrokoagulasi Untuk Pengolahan Limbah Cair Laboratorium Yang Mengandung Logam-Logam Berat Marthen Joning; Lydia Melawaty; Rosalia Sira Sarungallo
Paulus Chem Engineering Journal Vol 1 No 1 (2022): Vol.1 No.1 Juni 2022 Paulus Chemical Engineering Journal
Publisher : Prodi Teknik Kimia

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Abstract

In this research several variations of process variables such as pH, time and voltage were carried out to observe operating conditions that were more effective in reducing pollutants in wastewater. Before the electrocoagulation process was carried out the initial characterization of the waste using the ICP-OES analysis method and obtained the results of the initial concentration of pollutants such as TSS = 119 mg / L, Iron metal (Fe) = 24,453 mg / L, Copper (Cu) = 9,732 mg / L, Lead (Pb) = 0.309 mg / L and Selenium (Se) = 0.052 mg / L. The characterization of the wastewater pollutants does not meet the quality standards of liquid waste to be flowed to the environment based on Environmental Ministerial Regulation No. 05 of 2014. After going through the processing process by electrocoagulation method, pollutants of suspended solids and metals can be reduced in concentration to: TSS = 32 mg / L, ferrous metal (Fe) = 0.003 mg / L, Copper (Cu) = 0.074 mg / L, Lead (Pb) = 0.023 mg / L, and Selenium (Se) almost close to zero. Based on the data of pollutant concentrations in waste before and after the electrocoagulation process, it can be stated that the electrocoagulation method is effective in reducing Total Suspended Solid (TSS) pollutant levels by 73.12%, Iron (Fe) metals by 99.99%, Copper (Cu)) by 99.24%, Lead (Pb) by 92.56%, Selenium (Se) by 99.81%. The results were obtained under operating conditions at 10 volt voltage, 10 minutes time and pH 9. the electrocoagulation method produced the quality of wastewater that meets the requirements for drainage of the environment based on waste water quality standards according to the Environmental Ministerial Regulation No. 05 of 2014.
Pengaruh Variasi Volume Pelarut Heksan dan Waktu Ekstraksi Terhadap Lemak Kakao yang Dihasilkan Regina Resti Oktaviana; Lyse Bulo; Lydia Melawaty
Paulus Chem Engineering Journal Vol 1 No 1 (2022): Vol.1 No.1 Juni 2022 Paulus Chemical Engineering Journal
Publisher : Prodi Teknik Kimia

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Cocoa beans (theobroma cacao) are Indonesian agricultural commodities that have high economic value. Cocoa fat is one of cocoa bean processed products that is useful for aromatization. One method of extraction cocoa fat is the method of maceration, which is a separation method used to remove one or several components of a solid or liquid with the help of a solvent. In this research, cocoa fat extraction process is done, which is done percentage analysis, saponification number and acid number from cocoa fat extraction result. The purpose of this study was to determine the effect of process variables on cocoa fat content. Specifically include: (1) the effect of solvent volume on the amount of cocoa fat present, (2) to know the correlation of extraction time to the amount of cocoa fat produced. The results showed that the yield of cocoa fat was inversely proportional to the increase in the solvent volume variable (ml), and was directly proportional to the time of extraction (hours). The results showed that the highest percentage ofbrown oil of 18.12% was obtained from cocoa fat extraction using 200 ml hexane solvent for 6 hours yellow and solid and the aroma concentrated.
Pengaruh Berbagai Metode dan Jenis Kelapa Terhadap Kualitas Virgin Coconut Oil (VCO) Nikita Masirin; Maxie Djonny T.; Lydia Melawaty
Paulus Chem Engineering Journal Vol 1 No 1 (2023): Vol.1 No.1 Agustus 2023 Paulus Chem Engineering Journal
Publisher : Prodi Teknik Kimia

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The purpose of this study was to study the effect of the method of making VCO and the type of coconut on the quality of VCO.The benefit of this research is to provide information to the community about various ways of making virgin coconut oil to see its influence with the type of coconut used on the quality of VCO produced, economical, functional and can increase the selling value of coconut products, especially virgin coconut oil (VCO). The method of making VCO consisted of enzymatic method, fermentation method, and acidification method with ordinary coconut and hybrid coconut. Determination of quantity includes calculation of volume, yield and density while determining the quality includes water content, acid number, and organoleptic test. The research result found that the method of making VCO and the type of coconut affected the quality of VCO.
Co-Authors Lyse Bulo Marthen Joning Maxie Djonny T. Nikita Masirin Niko, Sisilia Pasae, Yoel Regina Resti Oktaviana Rosalia Sira Sarungallo