The aim of this study was to evaluate the use of nanofiber microfiltration membranes, spun by an innovative electrospinning technique, in water filtration applications. This study bridges between developments in electrospinning techniques for the production of flat sheet membranes and the application of these membranes in water filtration. The functionalized or non-functionalized for the removal of pathogens was investigated, in term of culture mechanism of bacteria spot in the waste water. Physical properties such as clean water permeability (CWP) and strength were also examined. The test showed that the electrospun membranes can be used for water filtration applications.

No abstract

The development of Industrial technology 4.0 was characterized by cyber-physical systems. This era make it easier for humans to connect with other humans, with industrial machines, and with the environment around them. With the industrial revolution 4.0 can be significantly increase the productivity. At this time, the single part products are often needed, where the product is used only a little and without needed for mass production or be known a custom design. The products that are custom design can be made by a 3D Printer (3DP) machine. 3D Printing is one of the newest technologies in the printing world, where the 3D printing technology is an easy to print and easy to develop the solid product with 3DP technology. In this study, the printing objects of 3DP using CAD data and then converted into G-Code using Creation Workshop software version 1.0.0.75. This study aims to determine the effect of layer thickness and exposure time to geometric of shaft made by 3D Printer with technology Digital Light Processing (DLP). The specimens tested is Ø20 x 100 mm with material Liquid Photopolymer Resin. The data from the test results analyzed using ANOVA with a 3-level design type and 2 factorial interactions (2FI) with 3 replications modeled by the Design-Expert® 10 trial version software. The results of the 5-point method analysis show that the main factor of most influences on the cylindricity of the test specimens is the layer thickness factors, and the optimum combination of parameters in this study is layer thickness 0.075 mm and exposure time 15 seconds.

The aim of this study was to evaluate the use of nanofiber microfiltration membranes, spun by an innovative electrospinning technique, in water filtration applications. This study bridges between developments in electrospinning techniques for the production of flat sheet membranes and the application of these membranes in water filtration. The functionalized or non-functionalized for the removal of pathogens was investigated, in term of chemical oxygen demand, total suspend solid and ammonium in the waste water. Physical properties such as clean water permeability (CWP) and strength were also examined. The results showed a very good removal of TSS (range 94.83-97.34%), COD (89.32-95.27%) and NH3­-N (64.48-72.87%). These test showed that the electrospun membranes can be used for water filtration applications.

Teknologi 3D Printer DLP (Digital Light Process) adalah mesin pencetak 3 dimensi yang berbahan resin dengan system penyinaran menggunakan proyektor cahaya dengan proses pencetakan lapis demi lapis. Pada penelitian ini penulis akan membuat objek yaitu salah satu komponen permesinan yaitu casing gearbox. Dalam penelitian ini penulis akan menganalisa pengaruh parameter proses (exposre time, off time, dan interkasi keduanya) terhadap dimensi hasil cetak dan mendapatkan parameter paling optimal guna diaplikasikan ke komponen atau objek pencetakan. Dalam melakukan pengujian pengukuran dimensi penguji menggunakan alat ukur jangka sorong Krisbow KW06-422. Kemudian data hasil pengukuran diolah dengan metode Anova dengan bantuan software design expert version 10. Setelah dilakukan proses penelitian didapatkanlah hasil yaitu parameter yang paling berpengaruh adalah factor interaksi antara parameter exposure time dan parameter off time terhadap dimensi pada benda yang dicetak, dan kombinasi parameter yang paling optimal terdapat pada parameter exposure time 10 second dan off time 1 second dengan tingkat ketelitian sebesar 95%.