Nature of the precipitate on the filter medium in filtration of the precipitation bath in Fenilon fibre manufacture

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%.

Multipurpose filters with ion-exchanger for the equalization of ammonia peaks

Water Science & Technology ◽

10.2166/wst.1995.0232 ◽

1995 ◽

Vol 32 (7) ◽

pp. 199-206 ◽

Cited By ~ 7

Author(s):

Martin Oldenburg ◽

Ivan Sekoulov

Keyword(s):

Operation Time ◽

Ion Exchanger ◽

Filter Medium ◽

Nitrification Rate ◽

Ion Exchangers ◽

Flow Rates ◽

Hydraulic Loading ◽

Influent Concentration

In this study the use of zeolites as ion-exchangers for equalization of ammonia peak loadings in aerated biological activated filters was investigated. For this use zeolites were mixed with a filter medium and the nitrifying filter was loaded with ammonia peaks for two hours at different flow rates. It could be demonstrated that during the phase of higher inflow concentrations the zeolite was collecting ammonia. When the influent concentration decreased ammonia was desorbed from the zeolite and could be nitrified by the bacteria growing on the filter medium. It was shown that additional zeolites can equalize variations of ammonia, especially in filter units which are working at a high nitrification rate and which are very sensitive to varying influent conditions. During the operation time of the filter no separation of the zeolite by higher hydraulic loading or by backwashing could be recognized. So the upgrading of nitrifying filters with zeolite represents an additional security for effluents containing oscillating ammonia concentrations.

KINETIC SORPTION OF CONTAMINANTS OF EMERGING CONCERN BY A PALYGORSKITE-MONTMORILLONITE FILTER MEDIUM

10.1130/abs/2016am-285984 ◽

2016 ◽

Author(s):

Jonathan Levy ◽

◽

Tedros Berhane ◽

Mark P.S. Krekeler ◽

Neil Danielson

Keyword(s):

Filter Medium ◽

Contaminants Of Emerging Concern ◽

Kinetic Sorption

Characterization of the emission behavior of pulse-jet cleaned filters using a low-cost particulate matter sensor/Charakterisierung der Emission von druckstoßgereinigten Oberflächenfiltern mit einem Low-Cost-Feinstaubsensor

Gefahrstoffe ◽

10.37544/0949-8036-2019-11-12-49 ◽

2019 ◽

Vol 79 (11-12) ◽

pp. 443-450

Author(s):

P. Bächler ◽

J. Meyer ◽

A. Dittler

Keyword(s):

Particle Size ◽

Particulate Matter ◽

Particle Size Distribution ◽

Size Distribution ◽

Low Cost ◽

Particle Emission ◽

Filter Medium ◽

Emission Measurement ◽

Pm2.5 Concentration ◽

Pulse Jet

The reduction of fine dust emissions with pulse-jet cleaned filters plays an important role in industrial gas cleaning to meet emission standards and protect the environment. The dust emission of technical facilities is typically measured “end of pipe”, so that no information about the local emission contribution of individual filter elements exists. Cheap and compact low-cost sensors for the detection of particulate matter (PM) concentrations, which have been prominently applied for immission monitoring in recent years have the potential for emission measurement of filters to improve process monitoring. This publication discusses the suitability of a low-cost PM-sensor, the model SPS30 from the manufacturer Sensirion, in terms of the potential for particle emission measurement of surface filters in a filter test rig based on DIN ISO 11057. A Promo® 2000 in combination with a Welas® 2100 sensor serves as the optical reference device for the evaluation of the detected PM2.5 concentration and particle size distribution of the emission measured by the low-cost sensor. The Sensirion sensor shows qualitatively similar results of the detected PM2.5 emission as the low-cost sensor SDS011 from the manufacturer Nova Fitness, which was investigated by Schwarz et al. in a former study. The typical emission peak after jet-pulse cleaning of the filter, due to the penetration of particles through the filter medium, is detected during Δp-controlled operation. The particle size distribution calculated from the size resolved number concentrations of the low-cost sensor yields a distinct distribution for three different employed filter media and qualitatively fits the size distribution detected by the Palas® reference. The emission of these three different types of filter media can be distinguished clearly by the measured PM2.5 concentration and the emitted mass per cycle and filter area, demonstrating the potential for PM emission monitoring by the low-cost PM-sensor. During the period of Δt-controlled filter aging, a decreasing emission, caused by an increasing amount of stored particles in the filter medium, is detected. Due to the reduced particle emission after filter aging, the specified maximum concentration of the low-cost sensor is not exceeded so that coincidence is unlikely to affect the measurement results of the sensor for all but the very first stage of filter life.

Calculation of the filtration process when the filter medium resistance varies from cycle to cycle

Chemical and Petroleum Engineering ◽

10.1007/bf01420098 ◽

1980 ◽

Vol 16 (1) ◽

pp. 33-37

Author(s):

A. A. Grichenko ◽

V. P. Abramov

Keyword(s):

Filter Medium ◽

Filtration Process ◽

Medium Resistance

Coated fabric cartridge filter medium for dust filtration

Filtration + Separation ◽

10.1016/0015-1882(93)80482-c ◽

1993 ◽

Vol 30 (7) ◽

pp. 613-614 ◽

Cited By ~ 1

Keyword(s):

Filter Medium ◽

Coated Fabric ◽

Cartridge Filter

High efficiency synthetic filter medium

Filtration + Separation ◽

10.1016/s0015-1882(00)88891-6 ◽

2000 ◽

Vol 37 (5) ◽

pp. 17

Keyword(s):

High Efficiency ◽

Filter Medium

Effects of Chitosan Concentration and Precipitation Bath Concentration on the Material Properties of Porous Crosslinked Chitosan Beads

Separation Science and Technology ◽

10.1080/01496399708000748 ◽

1997 ◽

Vol 32 (12) ◽

pp. 1959-1974 ◽

Cited By ~ 23

Author(s):

Yoshihide Kawamura ◽

Hiroyuki Yoshida ◽

Satoru Asai ◽

Ituo Kurahashi ◽

Hiroaki Tanibe

Keyword(s):

Material Properties ◽

Precipitation Bath ◽

Chitosan Beads ◽

Chitosan Concentration ◽

Bath Concentration ◽

Crosslinked Chitosan

Mathematical description of matter exchange between water components and adsorbing surface of filter medium of water purification units

Journal of the Geographical Institute Jovan Cvijic SASA ◽

10.2298/ijgi1402129v ◽

2014 ◽

Vol 64 (2) ◽

pp. 129-141 ◽

Cited By ~ 1

Author(s):

Alexey Vasiliev ◽

Lev Vasiliev ◽

Irina Bokova ◽

Аlexey Kroshilov

Keyword(s):

Water Purification ◽

Mathematical Description ◽

Filter Medium

Makes an Excellent Filter Medium for Strongly Acid and Hot Solutions

Chemical & Engineering News ◽

10.1021/cen-v023n012.p1054 ◽

1945 ◽

Vol 23 (12) ◽

pp. 1054

Keyword(s):

Filter Medium