Teknik Pub Date : 2022-02-03 DOI: 10.14710/teknik.v43i1.42660

T. Putranto, M. A. Budihardjo, Anik Sarminingsih

{"title":"Aplikasi Metode DRASTIC untuk Analisis Kerentanan Air Tanah terhadap Pencemaran di Kabupaten Tanah Laut, Kabupaten Banjar, dan Kota Banjarbaru, Provinsi Kalimantan Selatan","authors":"T. Putranto, M. A. Budihardjo, Anik Sarminingsih","doi":"10.14710/teknik.v43i1.42660","DOIUrl":"https://doi.org/10.14710/teknik.v43i1.42660","url":null,"abstract":"In 2017-2019, the Tanah Laut Regency, Banjar Regency, Banjarbaru City population was relatively high and continued to increase every year. The increase in the population reaches 1.39% to 2.92%. Along with population growth, the human need for clean water also increases, especially from groundwater. The study aims to assess the vulnerability of groundwater to contamination. The method used for the analysis of groundwater vulnerability to contamination is the DRASTIC method. It refers to seven parameters, namely groundwater depth (D), net recharge (R), aquifer media (A), soil layer (S), topography (T), impact to vadose zone (I) and hydraulic conductivity (C) by using geospatial analysis to calculate the DRASTIC Index/DI. From the results of geospatial analysis, there are three zones of groundwater vulnerability to contamination based on DI values, namely low vulnerability (95-106), medium vulnerability (106-146), and high vulnerability (146-186). The distribution of high zones dominates in the research area around of 75, 8%. The DRASTIC method requires a lot of data to provide an accurate analysis of groundwater vulnerability zone maps. This method has excellent accuracy and more effective in producing a map of the groundwater vulnerability zones to contamination.","PeriodicalId":30795,"journal":{"name":"Teknik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46658833","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

Design of Personal Health Monitoring Devices for Early Detection of Silent Hypoxia 早期检测无症状性缺氧的个人健康监测装置设计

Teknik Pub Date : 2022-01-11 DOI: 10.14710/teknik.v43i1.42752

H. Kuswoyo, E. Susana, Hendrana Tjahjadi

引用次数: 2

The Analysis of Na and Ca Ions Addition on Cassava Hydrolysis on Reducing Sugar Concentration to Increase Enzyme Activity: Hydrolysis Kinetics Study Na和Ca离子在木薯水解中的作用分析还原糖浓度提高酶活性的水解动力学研究

Teknik Pub Date : 2021-12-20 DOI: 10.14710/teknik.v43i1.41985

H. Hargono, B. Jos, H. Satriadi, Muhammad Fahmi Zakaria

{"title":"The Analysis of Na and Ca Ions Addition on Cassava Hydrolysis on Reducing Sugar Concentration to Increase Enzyme Activity: Hydrolysis Kinetics Study","authors":"H. Hargono, B. Jos, H. Satriadi, Muhammad Fahmi Zakaria","doi":"10.14710/teknik.v43i1.41985","DOIUrl":"https://doi.org/10.14710/teknik.v43i1.41985","url":null,"abstract":"Sweet cassava is tuber that contains large amount of starch so that it can produce reducing sugars. The addition of metal ions can increase enzyme activity. The purpose was to study the addition of Na and Ca ions on reducing sugars concentration and to study the hydrolysis kinetics. Experiments were carried out at various concentrations of substrates (100, 200, and 300 g/L), enzyme concentrations (1 and 1.5% (w/w)), addition of Na and Ca ions of 60 ppm. The hydrolysis method was conducted at temperature of 30°C with the enzyme StargenTM 002 at pH 4, for 24 hours. The results showed that starch concentrations of 100-200 g/L were able to significantly increase the reducing sugars at enzyme concentration of 1.5% (w/w). The addition of Ca ions increased the concentration of reducing sugar by 64% while the addition of Na ions increased it by 18.9%. The best reducing sugar concentration (68.79 g/L) was obtained at starch concentration of 200 g/L and enzyme concentration of 1.5% (w/w) with the of Ca ions. Kinetic studies show that phenomenon follows Michaelis-Menten equation with Vmax valued of 6.053; 8,881; 15.106 g/L.hour, respectively. So that, addition of Na and Ca ion can increase the enzyme activity","PeriodicalId":30795,"journal":{"name":"Teknik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45245857","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

Analisis Teknis dan Ekonomis Pembangkit Listrik Tenaga Surya Off-grid Menggunakan Software PVSyst untuk Usaha Mikro Kecil dan Menengah (UMKM) Coffeeshop Remote Area 应用PVSyst软件对中小微电站偏远地区离网发电机组的技术经济分析

Teknik Pub Date : 2021-12-09 DOI: 10.14710/teknik.v42i3.40242

Jaka Windarta, S. Handoko, Khilmi Nafadinanto Irfani, Sunan Muqtasida Masfuha, Candra Halim Itsnareno

引用次数: 3

Analysis of Fine Glass Waste Addition as a Filler Material for Sand Substitution on the Properties of Mortar Products 掺加细玻璃废料替代砂对砂浆制品性能的影响分析

Teknik Pub Date : 2021-12-09 DOI: 10.14710/teknik.v42i3.32686

S. Suharto, M. Amin, M. Al Muttaqii, R. Marjunus, Nuzullia Fitri, S. Suhartono

{"title":"Analysis of Fine Glass Waste Addition as a Filler Material for Sand Substitution on the Properties of Mortar Products","authors":"S. Suharto, M. Amin, M. Al Muttaqii, R. Marjunus, Nuzullia Fitri, S. Suhartono","doi":"10.14710/teknik.v42i3.32686","DOIUrl":"https://doi.org/10.14710/teknik.v42i3.32686","url":null,"abstract":"Inorganic glass waste can replace sand in mortar production due to its SiO2 content being greater than 70%. This study aims to analyze the increase in mortal product agility due to the substitution of sand and reducing environmental pollution. The fine glass waste used is restrained on 80 and 120 mesh sieves. The fine glass waste substitution variations are 0, 10, 20, 30, 40, and 50% of the sand weight. The results show that fine glass waste could be used as a material for sand substitution because of the content of SiO2 of 73.8%. The results from XRD indicate that the phase of fine waste glass is amorphous. The mortar was printed with a 5x5x5 cm cube mold, and it was soaked for 7, 14, and 21 days. Based on the results, the compressive strength with a high value of 13.58 MPa at 20% fine glass waste substitution and 120 mesh. The density of 2.8±0.8 g/cm 3 , porosity 4.40±0.001%, and absorption 2.83±0,0009%. The compressive strengths, density, porosity, absorption, XRF and XRD characterization were evaluated. The results showed that the SiO2 compound in waste glass with the right composition of 20% could significantly increase the compressive strength. Phase formation of Calcite (CaCO3), Quartz (SiO2), and Portlandite (Ca(OH)2) was formed from the results of XRF characterization","PeriodicalId":30795,"journal":{"name":"Teknik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46231294","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

Sintesis Karbon Aktif Limbah Lumpur Aktif Industri Gula sebagai Adsorben Limbah Logam Berat Cu(II) 活性炭合成废料活性黄工业吸附重金属废料Cu（II）

Teknik Pub Date : 2021-12-09 DOI: 10.14710/teknik.v42i3.36031

Adhi Setiawan, Muhammad Iqbal Ali Bawafi, Tarikh Azis Ramadani, Indri Santiasih

引用次数: 0

Analisis Penurunan dan Lendutan Sistem Pondasi Tiang Sebagai Perkuatan pada Tanah Gambut 分析泥炭地地基基础系统的下降和下降

Teknik Pub Date : 2021-11-30 DOI: 10.14710/teknik.v42i3.36836

D. Damanik, N. Sianturi, D. S. Saragih, V. E. Purba

引用次数: 0

Optimalisasi Sistem Monitoring Temperatur Logam Cair pada Proses Pengecoran menggunakan Pyrometer Berbasis Internet of Things (IoT) 使用基于物联网（IoT）的高温计优化跟踪过程中的液体逻辑温度监测系统

Teknik Pub Date : 2021-11-26 DOI: 10.14710/teknik.v42i3.36351

Muhammad Fathurrohman, Anugrah Erick Eryantono, Robby Debriand Rumbara