Crushed recycled glass as a filter medium and comparison with silica sand

2010 ◽  
Vol 38 (10) ◽  
pp. 927-935 ◽  
Author(s):  
Elif Soyer ◽  
Ömer Akgiray ◽  
Nursen Öz Eldem ◽  
Ahmet Mete Saatçı
Keyword(s):  
Filter Medium ◽  
Silica Sand ◽  
Recycled Glass

scholarly journals Use of filterability index in granular filtration: effect of filter medium type, size and shape

2018 ◽  
Vol 19 (2) ◽  
pp. 382-391
Author(s):  
Selda Yiğit Hunce ◽  
Elif Soyer ◽  
Ömer Akgiray
Keyword(s):  
Preliminary Test ◽  
Filter Medium ◽  
Silica Sand ◽  
Water Filtration ◽  
Recycled Glass ◽  
Filter Performance ◽  
Type Size ◽  
Filtration Effect ◽  
Granular Filtration ◽  
Medium Type

Abstract Ives' Filterability Index (FI) was employed to evaluate silica sand versus crushed recycled glass as a rapid filter media. The presence of past studies comparing these two media allows an evaluation of the applicability and utility of the FI concept as a simple and quick preliminary test for the assessment of different media to be used in water filtration. The present tests also allow an evaluation of the effect of shape on filter performance.

Influence of Type of Secondary Raw Material on Consistency of Fresh Mixture for AAC Production

2020 ◽  
Vol 998 ◽  
pp. 305-310
Author(s):  
Vit Černý ◽  
Matěj Lédl ◽  
Jindřich Melichar ◽  
Rostislav Drochytka
Keyword(s):  
Production Technology ◽  
Raw Materials ◽  
Bottom Ash ◽  
Silica Sand ◽  
Partial Replacement ◽  
Load Bearing ◽  
Recycled Glass ◽  
Coal Slag ◽  
Aerated Concrete ◽  
Partial Weight

Autoclaved aerated concrete (AAC) is, mainly in Europe, widely used construction material. It has an optimal combination of bulk density, strength and thermal conductivity coefficient for load-bearing and non-load-bearing structures of civil facilities. The production technology is based on a mixture of ground silica sand, lime, cement, gypsum, aluminium powder and additives. The grinding of sand is most often carried out in a wet way, and the sand sludge is consequently used in production technology. The aim of the experiment was verification of the effect of partial replacement of sand with the alternative raw materials in sand sludge on the rheology of the mixture. This parameter determinates how the modified mixtures affect the sludge pumpability. As a reference the consistency of the sand sludge of the normal production density of 1.65 g/cm3 was compared to the sand sludges of different density (1.60, 1.70 and 1.75 g/cm3) and with a fresh aerated concrete (FAC) mixture of 1.60 g/cm3. Then the sludges were modified by 30 % of alternative raw materials (recycled glass, coal slag, FBC ash, FBC bottom ash) as the partial weight replacement for sand. This partial replacement resulted in water/solids ratio adjustment which recommended value is 0.47 for recycled glass and coal slag, 0.59 for fluidized bed combustion (FBC) bottom ash and for FBC fly ash it is 0.70.

scholarly journals The use of silica sand, zeolite and active charcoal to reduce BOD, COD, and TSS of laundry waste water as a biology learning resources

2017 ◽  
Vol 3 (3) ◽  
pp. 202
Author(s):  
Moch Assiddieq ◽  
Satya Darmayani ◽  
Wirapati Kudonowarso
Keyword(s):  
Waste Water ◽  
Activated Charcoal ◽  
Aquatic Environment ◽  
Liquid Waste ◽  
Quality Standard ◽  
Filter Medium ◽  
Silica Sand ◽  
Filter Media ◽  
Biology Learning ◽  
High Concentrations

The aquatic environment contaminated with detergent waste in high concentrations can endanger the lives human and biota in the water. This study aimed to determine the decrease of BOD, COD and TSS content of laundry liquid waste by using filter media of silica sand, zeolite, and activated charcoal. Filter medium 1a can reduce BOD level from 98.6 mg/L to 58.80 mg/L (40.36%), while medium 1b can decrease BOD level to 21.20 mg/L (78.48%). It showed that media 1a had not fulfilled the quality standard of BOD of waste water that is 50 mg/L, while media 1b had fulfilled the standard of quality. Filter media 1a can decrease COD level from 210 mg/L to 78.80 mg/L (62.47%), whereas medium 1b can decrease COD to 25.60 mg/L (87.80%). This showed that media 1a and media 1b had met the quality standard of COD of waste water that is 100 mg/L. Filter media 1a can decrease TSS level from 465 mg/L to 122.5 mg/L (73.65%), whereas medium 1b can decrease TSS level to 52.3 mg/L (88.75%). This showed that media 1a and media 1b had met the quality standard of TSS of waste water that is 150 mg/L.

On the Use of Crushed Recycled Glass Instead of Silica Sand in Dual-Media Filters

2013 ◽  
Vol 41 (4) ◽  
pp. 325-332 ◽  
Author(s):  
Elif Soyer ◽  
Ömer Akgiray ◽  
Nursen Öz Eldem ◽  
Ahmet Mete Saatçı
Keyword(s):  
Silica Sand ◽  
Recycled Glass

Partial and Full Replacement of Silica Sand by Fine Recycled Glass in Cementitious Composites

2018 ◽  
Vol 6 (2) ◽  
pp. 91-98
Author(s):  
Sallal R. Abid ◽  
Sajjad H. Ali ◽  
Ahmed L. Kadhum ◽  
Yasir H. Daek
Keyword(s):  
Compressive Strength ◽  
Construction Industry ◽  
Waste Glass ◽  
Modulus Of Rupture ◽  
Silica Sand ◽  
Cementitious Composites ◽  
Test Results ◽  
Recycled Glass ◽  
Fine Glass ◽  
Adequate Management

One of the major concerns currently and within the close future is the adequate management and efficient reuse and recycling of wastes, which reduces the natural sources and energy consumption. Millions of tons of waste glass are discharged around the world annually. One of the successful policies of the recycling of waste glass is the use in the construction industry where it can be used as aggregate or cement replacement. In the current study, fine recycled glass with granular size of 0.075 to 0.3 mm was used as silica sand replacement in cementitious composites incorporated fly ash and no coarse aggregate. Cube and prism specimens were prepared with four replacement ratios of 0, 25, 50, and 100% to evaluate the compressive strength, the modulus of rupture, and the expansion. The test results showed that 50% and 100% replacements of silica sand by fine glass enhanced both the compressive strength and the modulus of rupture. For mixtures with 100% fine recycle glass, the compressive strength and the modulus of rupture increased by 25% and 33.6%, respectively, compared to mixtures with 100% silica sand. Moreover, the expansion was found to be reduced by approximately 30% as the silica sand was fully replaced by fine glass.

Silicon Tetrachloride Synthesis from Rice Hulls: Transmission and Scanning Electron Microscope Study

1972 ◽  
Vol 30 ◽  
pp. 236-237 ◽  
Author(s):  
Richard S. Thomas ◽  
Prabir K. Basu ◽  
Francis T. Jones
Keyword(s):  
Silicon Tetrachloride ◽  
Silica Sand ◽  
Mineral Matter ◽  
Chemical Heterogeneity ◽  
Scanning Electron Microscope Study ◽  
Rice Hulls ◽  
Hull Structure ◽  
Lower Temperature ◽  
Image Position ◽  
Disposal Problem

Silicon tetrachloride, used in industry for the production of highest purity silicon and silica, is customarily manufactured from silica-sand and charcoal.SiCl4 can also be made from rice hulls, which contain up to 20 percent silica and only traces of other mineral matter. Hulls, after carbonization, actually prove superior as a starting material since they react at lower temperature. This use of rice hulls may offer a new, profitable solution for a rice mill byproduct disposal problem.In studies of the reaction kinetics with carbonized hulls, conversion of SiO2 to SiCl4 was found to proceed within a few minutes to a constant, limited yield which depended reproducibly on the ambient temperature of the reactor. See Fig. 1. This suggested that physical or chemical heterogeneity of the silica in the hull structure might be involved.

Perancangan Pengkondisian Udara pada Ruangan Steril Rumah Sakit Mitra Medika dengan Standard Cleanroom Menggunakan Instalasi Ducting

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Fremmy Raymond Agustinus
Keyword(s):  
Air Conditioning ◽  
Static Pressure ◽  
Filter Medium ◽  
Positive Pressure ◽  
Design Tools ◽  
Microsoft Excel ◽  
Cooling Unit ◽  
X 24 ◽  
Air Passage ◽  
Booster Fan

Desain penyejuk udara juga dapat diterapkan di bidang kesehatan, dengan standar Cleanroom dapat diperoleh suhu, kelembaban, kenyamanan dan kebersihan yang dibutuhkan untuk ruang steril (ruang bedah). Perancangan pendingin udara dalam hal ini dilakukan dengan menentukan beban pendinginan yang diperlukan untuk ruang steril (ruang bedah), kemudian menentukan ukuran ducting, jalur ducting, dan jumlah penggunaan ducting. Desain ini menggabungkan unit split saluran yang dimodifikasi, kipas booster, filter pra, filter medium, dan filter HEPA dengan menggunakan saluran aluminium preinsulated sebagai saluran udara. Desain dilakukan dengan menggunakan perangkat lunak AutoCAD 2012, Design Tools Duct Sizer, dan Microsoft Excel. Dari hasil perhitungan dan desain didapatkan kebutuhan kapasitas 3 ruang bedah yaitu ducted ducted 100.000 BTUH sebanyak 3 unit, booster fan 3.3 - 4 Di WG sebanyak 3 unit, pre filter 24 "x 24" x 2 "6 set, filter menengah 610 x 610 x 290 mm 6 set, dan filter HEPA 1220 x 610 x 70 mm 12. Untuk ruang steril, tekanan statis yang dihasilkan oleh unit pendingin harus lebih besar daripada tekanan statis yang dihasilkan dari unit yang ada. di ruang semi steril. Dengan kata lain, ruang steril harus memiliki tekanan positif terhadap ruang semi steril. Hal ini dimaksudkan agar udara di ruang semi steril tidak masuk ke ruang steril ketika pintu antar ruangan dibuka. Desain dan perhitungan ruang bedah, suhu nyata yang diperoleh adalah 23 ° C ± 2 ° C dan kelembaban relatif yang diperoleh adalah 60% ± 2%.   Air conditioning design can also be applied in the health field, with cleanroom standard can be obtained temperature, humidity, comfort and hygiene needed for sterile room (surgical room). The design of air conditioning in this case is done by determining the cooling load required for the sterile room (surgical room), then determining the ducting size, ducting path, and the amount of ducting usage. This design combines modified ducted split unit, booster fan, pre filter, medium filter, and HEPA filter by using preinsulated aluminum duct as an air passage. The design is done by using AutoCAD 2012 software, Design Tools Duct Sizer, and Microsoft Excel. From the calculation and design result obtained the capacity requirement of 3 surgical room that is split ducted 100.000 BTUH as many as 3 units, booster fan 3.3 - 4 In WG as many as 3 units, pre filter 24"x 24" x 2" 6 sets, medium filter 610 x 610 x 290 mm 6 sets, and HEPA filter 1220 x 610 x 70 mm 12 sets. For the sterile room, the static pressure generated by the cooling unit shall be larger than the static pressure generated from the unit present in the semi sterile room. In other words, the sterile room must have positive pressure to the semi sterile room. It is intended that the air in the semi sterile room does not enter into the sterile room when the door between room opened. In this surgical room design and calculation, real temperature obtained is 23 °C ± 2 °C and the relative moisture obtained is 60% ± 2%.

MEASUREMENT OF DARCY AND FORCHHEIMER COEFFICIENTS FOR SILICA SAND BEADS

2006 ◽  
Vol 10 (1) ◽  
pp. 55-78 ◽  
Author(s):  
W. Bussiere ◽  
D. Rochette ◽  
T. Latchimy ◽  
G. Velleaud ◽  
P. Andre
Keyword(s):  
Silica Sand
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