Rekayasa Bahan Alam dan Energi Berkelanjutan最新文献_第2页

Modification of Thermoelectric Stove: Converting Heat into electric. 热电炉的改造:将热能转化为电能。

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2022-11-28 DOI: 10.21776/ub.rbaet.2022.006.01.03

B. Hermawan, Firmansyah Firmansyah

{"title":"Modification of Thermoelectric Stove: Converting Heat into electric.","authors":"B. Hermawan, Firmansyah Firmansyah","doi":"10.21776/ub.rbaet.2022.006.01.03","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2022.006.01.03","url":null,"abstract":"Panas yang dihasilkan pada pembakaran didalam kompor arang ada yang terbuang pada dinding kompor. Termoelektrik (TE) adalah semikonduktor yang dapat mengubah panas menjadi listrik menggunakan prinsip Seebeck effect, sebuah catu daya (power supply) digunakan untuk merubah output listrik agar sesuai dengan kondisi beban kerja peralatan. Tujuan dari penelitian ini adalah menggunakan termoelektrik (TE) untuk mengubah panas terbuang (wasted heat) pada dinding kompor arang/briket menjadi listrik. Selanjutnya output listrik dimasukkan ke sebuah catu daya lalu disimpan didalam baterai litium untuk dapat digunakan di waktu, tempat, dan peralatan yang berbeda. Kompor dimodifikasi agar sesuai dengan karakteristik dan spesifikasi TE yang akan digunakan pada tahap berikutnya. Arus dan Tegangan kemudian dinaikkan dengan membuat dua buah rangkain seri TE yang tersusun dari empat buah TE (tipe peltier) kemudian outputnya dirangkaikan secara paralel. Sebuah modul charger ditambahkan bersama dengan modul step-up kemudian dirakit untuk membuat satu unit catu daya. Kombinasi kipas, heatsink dan pasta panas pada modifikasi kompor mampu membuat TE berada pada spesifikasi pengoperasian. Mampu memberikan perbedaan yang nyata pada output arus sampai 2x lipatnya. Penyusunan rangkain TE secara keseluruhan meningkatkan output arus dan tegangan sampai 3x lipatnya. Daya diujung rangkaian adalah sebesar 5,04V dan selama 20 menit pengisian mampu mengisi sampai 1,59V.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127600617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Liquid Soap Fortification by Bay Leaf Extract. 月桂叶提取物强化液体肥皂。

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2022-11-28 DOI: 10.21776/ub.rbaet.2022.006.01.06

Anne Dian Pavita Zari, Lusia Emiliana Wahyuningtyas, Vivi Nurhadianty, C. Cahyani

{"title":"Liquid Soap Fortification by Bay Leaf Extract.","authors":"Anne Dian Pavita Zari, Lusia Emiliana Wahyuningtyas, Vivi Nurhadianty, C. Cahyani","doi":"10.21776/ub.rbaet.2022.006.01.06","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2022.006.01.06","url":null,"abstract":"Organisasi Kesehatan Dunia merekomendasikan rajin mencuci tangan dengan sabun untuk mencegah infeksi kulit. Sabun cair alami merupakan salah satu jenis sabun yang dikembangkan. Daun salam (Syzygium polyanthum) memiliki senyawa aktif bersifat antibakteri (fenolik, terpenoid, dan alkaloid) yang dapat difortifikasi dalam sabun cair untuk meningkatkan kualitasnya. Tujuan penelitian ini untuk mengetahui pengaruh penambahan ekstrak daun salam terhadap peningkatan kemampuan sabun cair alami sebagai antiseptik dan menguji formulasi sabun cair alami yang paling optimal yang difortifikasi ekstrak daun salam. Senyawa aktif daun salam diperoleh dengan metode ekstraksi refluks (suhu 65°C, 4 jam, pelarut etanol 96%). Ekstrak daun salam akan difortifikasi dalam sabun cair berbasis minyak kelapa dan zaitun dengan konsentrasi ekstrak daun salam 0%, 1%, 2%, 3%, 4%, 5%. Selanjutnya analisis fitokimia ekstrak daun salam dan diuji berdasarkan SNI 06-4086-1996 ((pH, densitas, organoleptik (warna, bau, tekstur), dan stabilitas), serta uji antiseptik (Kirby-Bauer metode difusi cakram). Maka dapat disimpulkan bahwa fortifikasi sabun cair oleh ekstrak daun salam dapat meningkatkan aktivitas antibakteri (Staphylococcus aureus) dan formula sabun cair yang difortifikasi ekstrak daun salam yang sesuai dengan SNI 06-4086-1996 dan disukai responden adalah sabun cair minyak kelapa dengan konsentrasi ekstrak daun salam 1% (pH 9,29, densitas 1,068 g/ml, diameter zona hambat 2,04 cm, formula stabil).","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127926811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Electrocoagulation Voltage and Dye Initial Concentration to The Removal Percentage of Rhemazol Red RB 电凝电压和染料初始浓度对利马唑红RB去除率的影响

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2021-12-31 DOI: 10.21776/ub.rbaet.2021.005.02.01

A. Hidayanti, Ulfiana Ihda Afifa, B. Ismuyanto, Juliananda Juliananda

{"title":"The Effect of Electrocoagulation Voltage and Dye Initial Concentration to The Removal Percentage of Rhemazol Red RB","authors":"A. Hidayanti, Ulfiana Ihda Afifa, B. Ismuyanto, Juliananda Juliananda","doi":"10.21776/ub.rbaet.2021.005.02.01","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2021.005.02.01","url":null,"abstract":"Batik industry wastewater has an adverse effect for the environment if disposed without any treatment. Wastewater of batik industry increases as production of batik industri growth. Remazol Red RB is one of the pollutant sources in batik dyeing process wastewater. The conventional method which is used for processing wastewater still has feebleness so as an innovative method wastewater treatment is needed. One ot those is electrocoagulation. Electrocoagulation is colloidal destabilization through an electrochemical process. This electrocoagulation carried out by varying electrical voltages and initial concentration of dyes. Electrical voltages are varied at 10 volt, 15 volt, 20 volt, and 25 volt, initial concentration are 100 ppm, 150 ppm, 200 ppm, and 250 ppm. Percent removal measured for determining the effect of electrical voltage and initial concentration. decreasing dyes color is measured using spectrophotometer UV-Vis. Electrocoagulation process uses aluminum as anode and iron as cathode which is arranged in monopolar series configuration. The wastewater is 200 mL in volume and the process was taken in 60 minutes. Result showed that both of electrical and initial concentration affect percent removal of synthetic wastewater dyes. The best electrical voltage and initial concentration are 25 volt and 100 ppm with percent removal obtained is 99,80% for 10 minutes electrocoagulation.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121381951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Extraction Time on Pectin Pulp and Peel of Melon (Cucumis Melo L. var. Sky Rocket) 提取时间对甜瓜果胶、果肉和果皮的影响

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2021-12-31 DOI: 10.21776/ub.rbaet.2021.005.02.04

Risang Parasu, Ersa Amalia Aisyah, Vivi Nurhadianty, Luthfi Kurnia Dewi

引用次数: 0

Synthesis of Chitosan Composite based on Black Soldier Fly (BSF) Exuviae with Kipahit Leaf Extract and its Inhibition Test against Xanthomonas oryzae 黑兵蝇(BSF)脱毛与基帕希特叶提取物壳聚糖复合材料的合成及其对米黄单胞菌的抑制试验

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2021-12-31 DOI: 10.21776/ub.rbaet.2021.005.02.03

S. Wahyuni, R. Fauziyah, M. A. Aziz, D. Eris, H. T. Prakoso, P. Priyono, S. Siswanto

{"title":"Synthesis of Chitosan Composite based on Black Soldier Fly (BSF) Exuviae with Kipahit Leaf Extract and its Inhibition Test against Xanthomonas oryzae","authors":"S. Wahyuni, R. Fauziyah, M. A. Aziz, D. Eris, H. T. Prakoso, P. Priyono, S. Siswanto","doi":"10.21776/ub.rbaet.2021.005.02.03","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2021.005.02.03","url":null,"abstract":"HDB disease is caused by Xanthomonas oryzae pv.oryzae, an important disease in rice plants. Recently, many organic compounds based antibacterial agents like chitosan are being developed. The potential raw materials for producing chitosan is Black Soldier Fly (BSF) exuviae. At the development, chitosan was formulated with other ingredients such as kipahit leaves (Tithonia diversifolia) extract. This study aimed to synthesize BSFbased chitosan, formulate BSF-based chitosan composites with kipahit leaf extract using 0.1% sodium tripolyphosphate and evaluate the antibacterial activity against Xanthomonas oryzae. The optimization of kipahit leaves extraction was performed with a solvent varieties (2% acetic acid, 96% ethanol and 20% DMSO). The antibacterial activity assay was performed by the disc diffusion method (0.1; 0.2; 0.4; 0.6; 0.8 and 1% (w/v)). The results showed that the optimum kipahit leaf extract was obtained using 96% ethanol. The kipahit leaf extract was successfully formulated with BSF-based chitosan to form a BSF-kipahit leaf chitosan composite. According to the anti-bacterial activity assay, the potential composite of kipahit leaf extract and BSF-based chitosan was obtained at a concentration of 1%. However, the effectiveness of its inhibition against the growth of Xanthomonas oryzae is less than the indivdual BSF-based chitosan.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130132754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrasonic Wave Assisted Maceration Method for Extraction of Red-Purple Pigment from Six Varieties of Red Spinach. 超声波辅助浸渍法提取6种红菠菜中红紫色素。

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2021-12-31 DOI: 10.21776/ub.rbaet.2021.005.02.02

L. Dinira, N. Rosyida, E. R. Wulandari

{"title":"Ultrasonic Wave Assisted Maceration Method for Extraction of Red-Purple Pigment from Six Varieties of Red Spinach.","authors":"L. Dinira, N. Rosyida, E. R. Wulandari","doi":"10.21776/ub.rbaet.2021.005.02.02","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2021.005.02.02","url":null,"abstract":"Natural dyes have been widely used for coloring food. Red spinach is an alternative resource of red violet color as it is abundant in nature. Despite its simplicity of extraction technique, the maceration method still needs enhancement because it is time-consuming. Ultrasound-assisted extraction (UAE) was used to shorten the extraction time. In this study, the red-violet pigment extraction has been carried out by the maceration method for six red spinach varieties. The spinach leaves' ratio to a mixture of ethanol 96% and citric acid 10% were 1:7, 1:9, 1:11, and 1:13. The highest absorbance for Delima, Abbang, Baret Merah, and Mira extracts were obtained from the ratio of 1:7, whereas Red and Clara extracts were 1:9. The optimum solvent/mass ratio for each variety was then used in the UAE. Extractions assisted by ultrasound in 5, 10, and 15 minutes have been conducted. UAE time yields the highest red-violet extract absorbance in 15 minutes for Red, Abbang, Baret Merah, Mira, and Clara while Delima was in 5 minutes. The results suggested that the UAE is more effective than 24-hours maceration for red-violet pigment extraction from red spinach.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128556975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of various alcohols in Trans-Esterification of Palm Oil (CPO) with CaO-MgO Catalyst 不同醇类对CaO-MgO催化棕榈油反式酯化反应的影响

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2021-06-28 DOI: 10.21776/ub.rbaet.2021.005.01.01

Umam Santoso, M. Rizky, S. Sumari, A. Wijaya, R. Retnosari, Muhammad Roy Asrori

{"title":"Effect of various alcohols in Trans-Esterification of Palm Oil (CPO) with CaO-MgO Catalyst","authors":"Umam Santoso, M. Rizky, S. Sumari, A. Wijaya, R. Retnosari, Muhammad Roy Asrori","doi":"10.21776/ub.rbaet.2021.005.01.01","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2021.005.01.01","url":null,"abstract":"The purpose of this research is the synthesis of alkyl esters from CPO through transesterification reaction using catalyst CaO-MgO. This experimental laboratory research through stages: (1) CPO refinement, (2) determination of CPO free fatty acid numbers, (3) activation of CaO-MgO catalysts, (5) synthesis of alkyl esters from CPO with alcohol (methanol and ethanol), (6) identification of the components of synthesized alkyl ester using GC-MS,characterization of alkyl esters including density, viscosity, refractive index and acid number test. The results showed that (1) alkyl esters can be synthesized from CPO through the transesterification reaction with methanol and CaO-MgO catalysts with a yield of 85.72%, while the transformation of ethanol is difficult to form ethyl ether (2) the character of methyl ester: density 0.86 g/mL, viscosity 3.23 cSt, refractive index 1.44819, and acid number 0.747 mg KOH/g methyl ester, (3) the main component of the synthesized alkyl ester contains 1.20% methyl myristic compound, methyl palmitate 40.637% methyl linoleate 9.332%, methyl 7-octadecenoate 42.986%, and methyl stearate 4.427%.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129225073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of Sulfuric Acid Activator in Banana Stem Activated Carbon for Fe Adsorption 硫酸活化剂对香蕉茎活性炭吸附铁的影响

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2021-06-28 DOI: 10.21776/ub.rbaet.2021.005.01.03

Fadhil Muhammad Tarmidzi, Maylina Anindita Sugiharti Putri, Anisa Novi Andriani, R. Alviany

引用次数: 0

Characteristics of Modified Banana Peel Flour Using Hydrogen Rich Water 富氢水改性香蕉皮粉的特性研究

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2021-06-28 DOI: 10.21776/ub.rbaet.2021.005.01.05

G. Budiarti, E. Sulistiawati, Nona Septiani, Windi Septianindi

{"title":"Characteristics of Modified Banana Peel Flour Using Hydrogen Rich Water","authors":"G. Budiarti, E. Sulistiawati, Nona Septiani, Windi Septianindi","doi":"10.21776/ub.rbaet.2021.005.01.05","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2021.005.01.05","url":null,"abstract":"Banana peels are rich in fiber and antioxidants that are good for health. Banana peels can be used as flour. However, the color of the banana peel flour is brown and the physical quality and nutritional content are not as good as wheat flour.Starch modification is needed to improve the properties of the banana peel flour. Starch modification using Hydrogen Rich Water (HRW) is safer and cheaper than other methods. The novelty of this study is that there are no studies using HRW to modify banana peel flour. The purpose of this study was to determine the physical characteristics, reducing sugar content and protein content of HRW modified banana peel flour according to the standard SNI flour 3751: 2009. The main ingredients used are banana peels and HRW. Experiments were carried out by immersing banana peels in HRW for 15.30,45,60,75 minutes and pH (5 and 9). The results obtained were no changes in the physical characteristics of modified banana peel flour. The best results of sugar and protein content were obtained at pH 5. The best reducing sugar content at 60 minutes immersion was 2.1575%. The best protein content was obtained at 15 minutes immersion of 4.2152%","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"04 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127260042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Utilization of Methylene Blue and Banana Peels as RFB Components (Redox Flow Battery) 亚甲基蓝和香蕉皮作为氧化还原液流电池RFB组分的研究

Rekayasa Bahan Alam dan Energi Berkelanjutan Pub Date : 2021-06-28 DOI: 10.21776/ub.rbaet.2021.005.01.02

Moch Hanif Baktiyar, Anggita Adiningrum, Fatin Septianingsih, B. Poerwadi

{"title":"Utilization of Methylene Blue and Banana Peels as RFB Components (Redox Flow Battery)","authors":"Moch Hanif Baktiyar, Anggita Adiningrum, Fatin Septianingsih, B. Poerwadi","doi":"10.21776/ub.rbaet.2021.005.01.02","DOIUrl":"https://doi.org/10.21776/ub.rbaet.2021.005.01.02","url":null,"abstract":"RFB (Redox Flow Battery) is a secondary battery that provides energy conversion between chemistry and electricity through an alternating redox reaction by 2 pairs of electrons and protons. RFB with active ingredient Vanadium (VRB) is a type of RFB that is widely used and has problems such as the price of Vanadium is expensive, is toxic and the solvent (H2SO4) is corrosive. Therefore, an inexpensive and environmentally friendly organic electrolyte component emerged, namely Methylene Blue and banana peels. Methylene Blue has 2 electron-proton pairs which provide a reversible redox reaction and have the potential as an active ingredient in the RFB electrolyte. Banana peels have potential as an electrolyte solvent because they contain carbohydrates, citric acid and mineral electrolytes (potassium, sodium salt, phosphorus and magnesium) which support the electrolyte properties of banana peels. The stages of making electrolytes by fermentation of banana peel solution, addition of Methylene Blue and testing (galvanostatic and stress). The test results showed that Methylene Blue was able to provide the best performance (efficiency) on RFB and banana peels as an electrolyte in the battery was able to produce a voltage exceeding the VRB output voltage.","PeriodicalId":163681,"journal":{"name":"Rekayasa Bahan Alam dan Energi Berkelanjutan","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125429416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0