2015-07-24T12:04:11+05:30 26–6 (210-vi–NEH, October 1994) Chapter 26 Gradation Design of Sand and Gravel Filters Part 633 National Engineering Handbook Table 26–13 Data for designed filter band 26–29 Table 26–14 Design filter band data for example 26–6 soil 26–34 Table 26B–1 Selected standard aggregate gradations 26–41 Figures Figure 26–1 Grain size distribution curve for fine clay base soil 26–9 Appendix I. ET j00��0m� ԰0 �A W n -0.0208 Tc 0.019 Tw -129.48 -23.4 Td ŏ�0}�ڲ�}V�i1 xm� &���0;� 7E �0� 00 �0 �S�� }� Calculation for activated carbon filter design. ( )Tj <>>> Q Gravity filters are commonly operated at 2 GPM/sq ft *, whereas pressure filters are operated at 3 GPM/sq ft and higher. /TT0 9.96 Tf 0 0 0 rg USA - Rapid Sand Filter Design Inputs Design a rapid sand filter to treat Q= 20000 m3/d Allowing filtered water for backwashing: Q_BW= 2% Time used for bakwashing per day = t_BW= 0.50 hours Assume the rate of filtration = 10 m/h Number of Filters 2.00 -0.0162 Tc 0 Tw T* (A typical pressure sand filter consists of a )Tj -0.0227 Tc 0.0359 Tw (he cross section of )Tj x�+��*�@02�M �,,����T����3 3C��\^. -0.0231 Tc -0.0177 Tw ( which has usually been )Tj �Y�7��f�W���e�!䉠;#�G��E#�q�����ȧ��@�k�B�qhBq�[���8���-��q�����.�V^9ՙB\D��{1�:{}X���ZR~���\K���pD� W n -0.0191 Tc 0.0173 Tw -189.84 -13.2 Td ET 0 0 0 rg 3 0 obj <> endobj 40 0 obj <>stream (graded under bed consisting of pebbles and )Tj �0��00l0dX �0 0� �0� �m0tdz x�0t002 0� 0 0 0 rg As with gravity filters, the media is usually sand or a combination of media, and filtration rates are similar to gravity filters. Fig 1 shows the arrangement of a )Tj (To assist in cleaning the bed, the backwash )Tj BT Fig 1 shows the arrangement of a vertical pressure sand filter. (suspended matter)Tj stream -0.0143 Tc -0.0025 Tw 0 -13.2 TD q �dت �0` � �0� �000�0�� O0� ! 0 Tc -0.0168 Tw ( )Tj 0.0394 Tc 0 Tw (-)Tj Definition of Filter Resistance and Ionic strength and activity coeficient. <> 2015-07-24T12:04:11+05:30 ҝb��{:�X%Iu��=m��͓{�z���-¶����B�&�p�����ל ��d��K2$��!�X�B#���V�����G��9��>�NQ� !�RדΊ�q>�a��. h endobj Literature conversion for pdf-MP - Microsoft Word uuid:51ba8fdc-23c4-4a75-bce5-bdde0de0db06 Each tank is NSF listed and manufactured by ASME Code certifiedwelders from Type 0 0 0 rg Ryznar Stability index. x�}ϱ 2 PRESENTATION AGENDA • Media Types • Filter Types – Filters versus Conditioners • Valve Types – Time Clock, Meter Initiated, Pressure Differential, Manual • Installation Procedures • Operation Procedures – Filter and Conditioner Sequences • Maintenance – Backwashing, Regeneration, Chemical Cleaning, Media Replacement (2)Tj W n /TT0 11.04 Tf /Im0 Do & W* n Design Overview James M. Ebeling, Ph.D. Environmental Engineer ... fluidized sand filter, moving-bed bioreactor etc, where the ammonia is converted to nitrate by bacteria. 419.16 419.28 3.24 11.88 re q Consequently, for a given particle size, the pressure drop increase is lower with angular grain than with rounded ones. 0 0 0 rg <> endstream q -0.0205 Tc 0.0037 Tw 189.84 0 Td Sand Filter Calculations Known Items: Diameter Height play sand $ 3.47 30 gal drum 19.5 29.5 filter sand $ 5.48 55 gal drum 23.75 34.5 size-cu.ft. )Tj the filter, and an under drain system to collect filtered water. /TT0 9.96 Tf -0.0137 Tc 0.0119 Tw T* For VOC contact time is 7 min 396.48 419.28 13.2 11.88 re q 10 0 obj h -0.0153 Tc -0.0015 Tw T* ET The process of )Tj ET -0.0187 Tc 0.0019 Tw 0 -13.08 TD BT q ) 0i. $ 0.0394 Tc (-)Tj The cleaning of the bed may … -0.0186 Tc 0.0018 Tw T* For Chlorine contact time is 2 min. �0 &0�0) (service. h /Im1 Do In order to design the pressure vessels, three world recognized standards have been taken into consideration; AD-Merkblatt N1 (Germany) , BS4994 (United Kingdom). (action, which loosens the intercepted particles. )Tj W n }����TC�|�F �� � ( )Tj -0.0198 Tc 0.003 Tw 0 -13.08 TD q (-)Tj /TT0 9.96 Tf 409.68 419.28 3.6 11.88 re �,����Ci��_BFu&��" -0.0224 Tc 396.48 421.68 Td Osmotic pressure calculator. (once the pressure drop across the filter is )Tj ET h 0 0 0 rg 0 0 0 rg (sand grains immediately below the surface. (treated by addition of a coagulant like alum)Tj -0.012 Tc -0.0048 Tw T* (filtration process continues )Tj -0.0161 Tc 0 Tw T* ET ET (P)Tj -0.0224 Tc 120.6 98.16 Td (Product Description)Tj /TT1 14.04 Tf Filter is designed based on velocity consideration. sand filter using the sand. 288 0 0 -175.44 312.12 615.24 cm { (excessive. Q ET Ion exchange calculator. ( Vertical Pressure Sand Filter)Tj 8 0 obj -0.0178 Tc 0.001 Tw 0 -13.2 TD endstream Anthracite/sand filter beds normally provide all of the advantages of single-media filtration but require less backwash water than sand or anthracite alone. 3 0 obj <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> evaporation of water (lake en pan evaporation) Seawater Reverse Osmosis Cost Analysis 1.145 623.685 612.577 132.82 re q endobj -0.02 Tc 0.0032 Tw T* /TT0 9.96 Tf 1 0 obj /TT0 9.96 Tf endstream (-)Tj q 0.0394 Tc 0 Tw (-)Tj has constructed and installed at Indian Oil plant Korba (Chhattisgarh). -0.0161 Tc 0.0127 Tw 272.52 112.2 Td What is EBCT? 0.0394 Tc 0 Tw (-)Tj 5594 (retained on the sand surface ands between the )Tj + .�� �0t 0� C0� 4f^ 0 ) 0� !�0� 0���~� �0 �0�w0J� u� &. endobj Acrobat PDFWriter 4.05 for Windows NT It is used to remove suspended solids from raw water. BT Pressure sand filter is the first unit process in any treatment. /TT0 9.96 Tf Activated carbon filter calculation based on EBCT value. 135.12 0 0 -32.28 69.12 678.24 cm endstream endobj 15 0 obj <>stream h Use the following assumptions: loading rate is 216 m3/d.m2 , specific gravity of sand is 2.65, the shape factor is 0.82, the bed porosity is 0.45, the water temperature is 10oC, and the depth of sand is 0.5 m. Sieve No % retain d(mm) 8-12 7.3 2 12-16 17.1 1.42 q ?����i3 !���B�KO��,&�RB!��d�ϿA�X�"�B�4��Q��U(��� !���p�wS��nJ-����H!��.��z*Ǔ�[�e'!��KQ~������K"���M���MB!P���? water treatment The processes that withdrawn water may undergo prior to use, ... blueair air filter analog and digital filter design pdf permanent ivc filter making a pop filter berkey water filter scam line filter drier stop spam filter Calculation of the Pressure Drop over the Filter Medium and/or the Filter Cake. 0 0 0 rg Roughing filters may be used CHAPTER 5 ... not only pollute the filter surface but also disturb the sand to a greater depth than will be removed by scraping. <> �l� �d� 0� �C �0c Cp �0 �/00� �0 + " 78.12 84.24 234 27 re 6 0 obj Changes to any of these key sys-tem parameters will result in systemwide perform-ance issues. (The filter is now taken out of service and )Tj (and valves, graded sand supported by layers of )Tj 1 Granular Media Filtration for Water Treatment Applications Terry Engelhardt Sales Development Manager – Drinking Water Hach Company The intent of this paper is to provide cursory information about filter design and function. -0.0313 Tc T* Calculation for pressure filter design. Nb W0�! 137.4 95.76 132.24 11.88 re Specifically, pressure filter systems have been developed to focus on common ground 413.28 419.28 5.88 11.88 re Q Q (Fig)Tj (The filter is now ready to be put back into )Tj -0.0454 Tc 409.68 421.68 Td endobj -0.026 Tc 0.0092 Tw 0 -13.2 TD -0.0174 Tc 0 Tw T* 0.0326 Tc -0.0908 Tw 137.4 98.16 Td 0 Tc -0.0168 Tw ( )Tj This water filtration unit (Pressure Sand Filter), capacity 40 cum / hr. . %PDF-1.5 (There is steady rise in the loss of head as the )Tj /TT1 14.04 Tf (water uniformly throughout t)Tj /TT0 9.96 Tf �0' 00��9 ��� �� KC �0� �0z " ! h Calculation of clean bed head loss Type of flow Laminar ( R e<6) TransitionalorTurbulent The flow through a clean filter of ordinary grain size (0.5-1mm) at ordinary filtration velocities (4.9-12m/h) would be in the laminar range . ! 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