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All Journal SCIENCE TECH: Jurnal Ilmiah Ilmu Pengetahuan dan Teknologi Proceedings Series on Physical & Formal Sciences
Dimas Langga Chandra Galuh
Universitas Sarjanawiyata Tamansiswa Yogyakarta
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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KAJIAN DAKTILITAS DAN KEKAKUAN PERKUATAN BALOK T DENGAN KABEL BAJA PADA MOMEN NEGATIF Dimas Langga Chandra Galuh; Hadi Pangestu Rihardjo
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 2 No 1 (2016): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (678.244 KB) | DOI: 10.30738/jst.v2i1.396

Abstract

Strengthening is a solution to improve supporting power of the boned concrete structure and strengthening the endurance of building. This research aims to find out the stiffness, ductility and cracking pattern of the negative moment area of beam. This research used three experimental beams, they are 1 control beam (BK), 1 strengthening beam 4Ø10 mm of steel cable on pulling area (BP1) and 1 strengthening beam using 4Ø10 mm of steel cable on pulling area and 2P8 mm on the pressing area (BP2) using mortar as the concrete blanket. The experimental object was in form of boned concrete beam T, with 2400 of length (l), 250 mm of height (h), 150 mm of width (bw), 400 mm of width of flens (t), 75 mm of height of flens (t). The steel cable and the diameter of boned steel used for strengthening process is 10 mm and 8 mm of plain type. The beam would be tested on the basis of flexibility by using static loading and simple support. The measurement of load, tension, and flexibility was done during the experiment (testing). Based on the results of experiment, it is shown that the maximum loads on the testing objects of BK, BP1, and BP2 respectively are 88.5 kN and 259 kN. The ratio of stiffness comparison of initial stiffness BP1 and BP2 to BK was 0.33 and 0.48. The ratio of ductility comparison of BP1 and BP2 to BK was 0,33 and 0.48. The collapsing pattern of each strengthening beam was debonding, but the steel cable on the strengthening beam still contributed the pulling tension, so the existing load kept on increasing until reaching maximum load.
Efektivitas Instalasi Pengolahan Air Limbah Berdasarkan Parameter COD, BOD, TSS, pH (Studi Kasus Industri Tahu di Dusun Janten Ngestiharjo Kasihan Bantul) Wawan Setiadji; Novan Rico Effendi; Widarto Sutrisno; Ahmad Mashadi; Dimas Langga Chandra Galuh
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.848

Abstract

The liquid waste generated from tofu production process contains high Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), Total Suspended Solid (TSS) as well as low pH levels or acidity. Therefore, the tofu waste needs to be treated before being discharged into the environment to prevent negative impacts on the surrounding environment. Thus, this study aimed to test the effectiveness of the tofu wastewater treatment plant by monitoring the parameters of COD, BOD, TSS and pH using the closed reflux titrimetry, gravimetri and pH meter methods. The sampling was carried out with triple sampling (triplo) at each testing point, which were the equalization tank, anaerobic baffle reactor tank, anaerobic filter tank, and final settling tank. The sample testing was conducted at the "Balai Laboratorium Kesehatan dan Kalibrasi Yogyakarta". The results of the testing were used to determine the reduction in COD and the increase in pH between the wastewater treatment plant tanks, and then the effluent of the wastewater treatment plant was compared with the wastewater quality standards. The results of this study indicate that the average reduction of COD in the effluent is 94%, BOD is 93%, and TSS is 87%. Based on these findings, it can be concluded that the effluent from the wastewater treatment plant is not yet effective in meeting the wastewater quality standards. However, it is worth noting that the pH parameter meets the wastewater quality standards, with an increase of +1.38 compared to the influent pH level. Therefore, in terms of this parameter, the wastewater treatment plant can be considered effective in raising the pH.
Co-Authors Ahmad Mashadi Hadi Pangestu Rihardjo Novan Rico Effendi Wawan Setiadji Widarto Sutrisno