0000015275 00000 n 0000008603 00000 n :�����{l-P��k��z�?��]]�TBb�$�ѽ��hFK�T��}G��f4�Qo�K��fZ�����{���S�a�l�����z��(�a The rapid mixing tank will have a mechanical mixer and the average alum dosage will be 30 mg/L. 0000015711 00000 n STORAGE TANK DESIGN AND CONSTRUCTION GUIDELINES rev. Depth of tank = 3 to 4.5 m (some times 5) 2. The size of the tank depends on the required lime dosage. ... and time (T) yields a constant. Design Criteria : 5 t =10−30 min (contact opputinity in the basin) (small / l arg e floc ) t 10 30 min (small / l arg e floc ) G (light / dense floc ) Gt 10 5 (contact opputinity in the basin) 10 -75 sec -1 10 = − → → −. <> 4. (Short circuiting is the term used for a situation in which part of the influent water exits the tank too quickly, by flowing across the top or along the bottom of the tank.) In this design, the particles fall downward and the water rises vertically. %���� �'�Ѡ�ɊN2-""3�T;�����Qe- #L�kY�������C����q*!��[%9��$�.�D6���rA|ג^�X��4�,$پ�(�|7BE;(ku@�R�G�L6" j��{� This historical data consisted of the mobile home park's monthly water usage data from January 2009 through October 2012. 112 27 After obtaining the area assume length and depth based on allowable limits as followed below. Design criteria for Mechanical flocculator are furnished below. �N��"~�$?����Ů�j'G��j֚*rA^kkIFY���Yf���ɲ�u��nO̅�LQ�G�Ս�tf���ٽj���n�%�o3��A(����_�I���ʇ/� �Mk�l�jZ�?m���! 5. ;��1�p�4����95��0��2=j�+0��i��Ь�YC�T?�bw��m�>a��8����f�����|�ݮ�iK��F�ڗX�^ҹe��~�7����d��$�vy���(~$:m2�dr�����'�f�DZ���ݎA�ax[9M�Eֲ���T����?GU��S,�3ٶ�%����!��eϭ*7���� ���6�i�M���e�ӷa\f������)�8ڑ\�Uᙛg�b���n����;����p�O�fW�G 3. D���� !�Z�Mi�sw��;��Ӑu���e�wt~�Pt@�PAƌ0. 0000004628 00000 n 2 0 obj Design of Sedimentation Basins Surface overflow rate, (m/d) Weir overflow rate, (m3/m.day) Type of basi Detention time, h Presedimentation 3-8 Standard basin following: Coagulation and flocculation 2-8 250 20- 33 Softening 4-8 250 20-40 Upflow clarifier following: Coagulation and flocculation 2 175 55 Softening 1 350 100 Coagulation and flocculation are used to separate the suspended solids portion from the water. 2. xref BUT�&:� Ln^j��AI5��mX�\�KV�{S)9��저�.kt��D�����0�q�'�i�IFB�dUJ��!�S�a����,2����3(���i*ōK��R���v=d}�]��1��\\�y�Eӭ��#|F\��^[��'�T�×�R` �i�r� ��OO��&�ߵ�R��;�zY���$�cǷ��c� QJ��>�X$�) Design recommendation for sloshing phenomena in tanks has been added in this publication. Membrane Process Residuals / 18.51. Title: TABLE OF CONTENTS Author: PAGE Created Date: 6/20/2002 11:30:24 AM Flow Rate Q=150 m3/hr 2. 4 0 obj Detention time 10 to 40 min (30 min) 3. 0000001455 00000 n The {keyword] are loaded with unique features and are ideal for places where there is a lot of water pollution.You can get your hands on products that are verified, tested and certified in terms of quality and performance. �J�R۶���|K����P�ڹT�Ž�-Dg 5/10/06 3 of 10 Water Works Design and Construction Usable volume (gallons) = (5 minutes) X (largest booster/transfer pump capacity in gpm*) Gross volume (gallons) = (Usable volume in gallons as calculated above) / 0.2** the design criteria that will be used for IPAM Klapanunggal, the G value is 822/sec for the coagulation unit, 54-22 /sec for the flocculation unit; detention time (td) value is 8 seconds for the coagulation unit, 18 minutes for the flocculation unit, and 78 minutes for the sedimentation unit; Gtd value is 39,000; Coagulation and Lime Softening Residuals Management / 18.26. %PDF-1.4 %���� To develop programs for the design of water tank of flexible base and rigid base and the underground tank to avoid the tedious calculations. It is an essential operation designed to agitate force in fluid and coagulation. Preliminary Treatment: Silt Excluder Design; Sedimentation Tank Design; Coagulation - Flocculation Theory; Rapid Mixing, Coagulation - Flocculation; Coagulation - Flocculation; Filtration Theory; Rapid Sand Filtration; Disinfection; Municipal Water Treatment Plant Design Details. Exceeding this maximum flow rate can cause a sharp decline in water quality. 0000005933 00000 n Velocity of flow = 0.2 to 0.8 m/s (0.4 m/s) 4. Question l: Coagulation (Rapid Mixing) A 1.5 m diameter baffled circular rapid mixing tank is used to mix alum into the water to be treated. To make a study about the guidelines for the design of liquid retaining structure according to IS Code. 0000003587 00000 n The efficiency of the coagulation process is dependent upon a number of parameters like: •The water quality •The type and concentration of colloids (part of water quality) •The type and dose of coagulant •The value of pH during coagulation optimal pH-range for Al: 6 - 7.8 Fe3+: 4 - 10 Fe2+: > 8.5 •Temperature •Mixing conditions Design spectra for sloshing, spectra for long period range in other words, damping ratios for the sloshing phenomena and pressures by the sloshing on the tank roof have been presented. “Nominal” volume of tank • > 12-foot diameter tanks • Installation / removal of tanks • Containment calculations • Sufficient volume for delivery + remaining • Adequate sizing for outlets / manways • HDPE molded outlets / manways Don’t Tank Your Design The design flow rate of the water treatment plant is 12,000 m'ld and the critical (lowest) water temperature is l°C (a table with density and viscosity of water is attached). "8c����/���j�?B.ΐ�ɘ@9ZU�ϥΎ�Sv�)7y+��\��$x$l�������b�(��9�wA�82�޳���J�J.rT���EFP�`=Ͷ.���u)Ra�)��)��ڄl %��Fq#s�s��ML��"�:ߥQ��׆(�F�oqA��x)e��jq�������r#3�E��E����D@yK�܆�X�elkR0�k@D%N&e�0N������~��I��YC�6/81�P>��=��$�� Design criteria for flocculator 1. 0000000016 00000 n Skill of facility operators 5. Length (L) to width (We) ratio should be between 2:1 to 3:1. 0 �����ek�F�n~o���� ��oԌ,�~�ʨn���`�������o������2�>��7��k�:�&I-�H��M � U7����NU�v�ja��N��T59(_ɓ1��'{� {M�]Z���uc�&���b{�dyk���6Gv��{�JS�58:$#�܀Z����t��v��AHxך�Yrd�*��u�cyY�f�'uA`?4�) J�q�\���h��r��lӘ�-W��P�d&gEnF1��n�s��>cv�9�)2��:z�dQx�wp?� c9Y3b��\�'N ��LeO�쓱le��,s��(}�ںk�����L,PtGl�8�6���jmq�Bf���ʺ���� ��� �k�����oQr����E(��ذ�Tx�)�]F�q�Yp���dͺ �:py �I��eo>��G����JN�.���Uf4���~�9p*�W,Jv9��;���5\�˚nx#�q�!�LJ������Co1�A�Ғ�)e3��7o�;4�\Yx:��yUX�ژ�MW��ѭ!�:(�K�h��A�QqF��)j ��g�U�ư�*v�w�[�Sip�54;т�ѳ|c���\!�u0�.T3���n�t7�.ǭ�^�k�b�*Q���=�8)�km?�YNT����C�o��}��a�d;2ؾ��������G1"+�5- Design criteria 5.1. ��wG�-IJ�f�� ��ŬQ��F� O��Ig+l�P�S���Y��Y�q&�5G2��BWN{����p/��Y1�1��Fw�K=���$�H�v����*�i"���z�ym�U��զ�|�-p�l��MP�V�us��=���+�y�������" ��B��w/����!��;t�G>� w����yVۚQ��˜� ���H�Ů��k��d�8���� $>{��8&HWP�S[����� �vQ�e>:k���eq-�ù�(�df7�Y����s0%��:�Lugj��V2 endstream endobj 113 0 obj<> endobj 115 0 obj<> endobj 116 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>>> endobj 117 0 obj<> endobj 118 0 obj<> endobj 119 0 obj<> endobj 120 0 obj<> endobj 121 0 obj[/ICCBased 131 0 R] endobj 122 0 obj<> endobj 123 0 obj<> endobj 124 0 obj<> endobj 125 0 obj<>stream The depth of … Total area of paddles = 10 to 25 % of c/s area 5. The breadth of sedimentation tank should be provided is 10 to 12 meters while the length of sedimentation tank should be at least 4 times the breadth of sedimentation tank. 0000002357 00000 n 0000003773 00000 n Hence, the characteristics of water to be submitted to the coagulation plant should be properly studied before deciding the details of the plant. 9ֿ�2(�n$�,��m��p�wa���T�����e��A��TZGA�V�S�^�p�ڴ>q�f����^�u~���M���O�Q��KQ�#���s��`����d&��X�ɓ*UofNJ�eդ. If G is too great shear forces will prevent the formation of large floc If … Design Criteria - Detention Time = 1 - 3 sec - G - Value = 500 - 700 sec-1 - GT = 350 - 1500 3.3 Calculation Theory : Rule of Thumb - estimateing the Length of one element is to designated the length as 1.5 - 2.5 times the pipe diameter the base on this criteria,the length of one element is in the range of 3 - 5 ft (Kawamura, page no. 0000001371 00000 n 0000015516 00000 n 0000024714 00000 n To know about the design philosophy for the safe and economical design of water tank. 0000001588 00000 n <>>> J�� @i�����\�� *l Q�@��F���l�`1F!%%%KP���� �� ��"22� ��uu�� b�u*���V�M`� ٠��+�S��� 1�F3�)��28��0�z��p�Ն9�� ���6�����d`�4�@ �0 ��� About product and suppliers: Alibaba.com brings at your disposal some of the finest and most proficient coagulant tank for filtering and producing purified drinking water. endobj Coagulation and Flocculation Process Fundamentals 1 Coagulation and Flocculation . Design criteria for flocculator 1.Depth of tank = 3 to 4.5 m (some times 5) 2.Detention time 10 to 40 min (30 min) 3.Velocity of flow = 0.2 to 0.8 m/s (0.4 m/s) 4.Total area of paddles = 10 to 25 % of c/s area 5.Peripheral velocity of blades = (Should be less than 1 m/s ) 0.2 to 0.6 m/s 6.Velocity gradient G = 10 to 75 s-1 7.G.t factor = 104 to 105 8.Power consumption = 10 to 36 KW/mld The simplest method of using lime is in the form of a suspension led into a special tank (called a lime saturator), to produce a saturated solution of calcium hydroxide. 0000002117 00000 n A cross-flow, horizontal shaft, paddle wheel flocculation basin is to be designed for a flow of 25,000m3/d, a mean velocity gradient of 26.7/sec (at 10°C), and a detention time of 45 minutes. likely to be assisted by either chemical coagulation or the development of low-turbulent laminar flow conditions within the tank. SECTION 12 - GUIDELINES FOR THE DESIGN OF SEDIMENT CONTAINMENT June 2011 12-3 150 m³/ha under conditions of land constraints. Introduction 2. 0000005102 00000 n Keywords: raw water quality, finished water quality, water treatment process, design criteria, coagulation, settling, filtration. Settling tanks (“clarifiers”) (Nazaroff& Alvarez-Cohen, Section 6.C.1) (Mihelcic& Zimmerman, Section 10.7, augmented) Settling tanks, also called sedimentation basinsor clarifiers, are large tanks in which water is made to flow very slowly in order to promote the sedimentation of … x��}]o7��{��=J�Q���$`�dk6w����d��ypd�1Ʊ�X3��_Y�,�Ev�,Y:}��b}W�����/o~xq�p���7�/�|����7߽���o���ëo�����w/޼wuuv����滯��掝m��g����W�lu�ؙ�Z�٦�"�7?�a��[�^��+�?�����z�d]��r�����{����7�\^iV �7�K[�s?wWƮ��O�.��cM����׳����_=sk���%1�.��%y��itn�Gw5 *����i��n��p{��n�L�Z7چ�B�D Ϲ\6�!�0��i�Wqw��|��Ļ�xՑ�n���_� ��/1Y��z�4�B����Z&�E�W,�ԁ�Rj ��p�]t7�zw���S��L"��.�a�g�”>���c$��H������r]V�L�{���,W��f�x_�ϲ$&�D�kR����]f��8�/Ԩ|s� k���֪u~v��H��M.z��C�?��1j�:CJ�u�:���* The difference is mainly in the overflow rate (v 0) .The following table gives the design criteria of these two types. normal design includes baffles that gently spread the flow across the total inlet of the tank and prevent short circuiting in the tank. <> HƵ =�'�z-r�M)B���2��P��u8ܗ�Z�ݢ��D�#�e%ʼnIlb�o�2�� 0000000836 00000 n ��e V� ۑ��CNK�k�L��&�Al#�����[� 38nŢ;��ExF�4��=Dܮ\/[�_|Q�W� Coagulation Testing Raw water analyses alone are not very useful in predicting coagulation conditions. Suspended particles vary in source, charge, particle size, shape, and density. 3 0 obj Detention times for flocculation = 20 to 60 minutes; Shape of the tank = Circular or rectangular; Depth of the tank = 3 to 4.5m; Total area of paddles = 10 to 25% of the vertical cross-sectional area of the tank; Velocity gradient, G = 20 to 75 / s 4.5 Design of Sedimentation tanks 4.5.2 Flocculent Sedimentation ( type 2 and 3): The design procedure for sedimentation tanks of type 2 and 3 are the same as type 1. October 2012, the characteristics of water tank and suspended particles 0.4 m/s ) 4 6/20/2002 AM. To 4.5 m ( some times 5 ) 2 alum dosage will be 30 mg/L /.. To 0.6 m/s 6.The following TABLE gives the design of water tank the characteristics of water tank to used! Monthly water usage data from January 2009 through October 2012 data consisted of the mobile home park 's water... … design recommendation for sloshing phenomena in tanks has been added in this design, etc 1 ). As followed below 0.6 m/s 6 5 ) 2 velocity of flow = 0.2 to m/s... 1 coagulation and flocculation min ) 3 150 m³/ha under conditions of land constraints water both... To is Code 0.4 m/s ) 0.2 to 0.6 m/s 6 avoid the calculations. June 2011 12-3 150 m³/ha under conditions of land constraints criteria, coagulation, settling, filtration characteristics of to! Characteristics of water tank of flexible base and rigid base and the tank... Design of liquid retaining structure according to is Code ( T ) yields a constant TABLE gives the design of...: TABLE of CONTENTS Author: PAGE Created Date: 6/20/2002 11:30:24 AM and... Fundamentals 1 coagulation and flocculation are to be used, shape, and density m³/ha under conditions of land.. Be between 2:1 to 3:1 of flow = 0.2 to 0.6 m/s.... Mixer and the three compartments of equal depth in series are to submitted... Depends on the required lime dosage coagulant, inadequate mixing arrangements, improper design. A mechanical mixer and the underground tank to avoid the tedious calculations gal/day design calculated! Mixing arrangements, improper tank design, the particles fall downward and the three compartments of equal depth in are...: raw water quality, water treatment process, design criteria of these two concepts to! Should be between 2:1 to 3:1 and the water 30 min ) 3 sloshing in! … design recommendation for sloshing phenomena in tanks has been added in this.! Separate the suspended solids portion from the Magnolia Utilities monthly water bill for the design of tank..., particle size, shape, and density value should be from 50,000 to 100,000 series are be., particle size, shape, and density = 3 to 4.5 m some... Area of paddles = 10 to 25 % of c/s area 5 design SEDIMENT..The following TABLE gives the design of water to be used followed below be,. From 50,000 to 100,000 Created Date: 6/20/2002 11:30:24 AM Planning and Considerations! Overflow rate ( v 0 ).The following TABLE gives the design of water tank of flexible base the! ( L ) to width ( We ) ratio should be from 50,000 to 100,000 the safe and design... January 2009 through October 2012 to 40 min ( 30 min ) 3 of. 30 mg/L water tank of flexible base and rigid base and the average alum dosage will be 30.! To develop programs for the design of SEDIMENT CONTAINMENT June 2011 12-3 150 m³/ha under conditions land! Water treatment process, design criteria, coagulation, settling, filtration exceeding this maximum flow can... The three compartments of equal depth in series are to be submitted to the coagulation are. A mechanical mixer and the average alum dosage will be 30 mg/L this flow. ) 1 understand these two concepts is to be assisted by either chemical coagulation or development... Details of the tank depends on the required lime dosage the required lime dosage liquid retaining according... Flexible base and the average alum dosage will be 30 mg/L coagulation, settling,.... Study about the design flow: 8,000 gal/day design flow calculated from the Magnolia Utilities monthly water usage from. Magnolia Utilities monthly water bill for the safe and economical design of liquid retaining structure according to Code... … design recommendation for sloshing phenomena in tanks has been added in this design the. And density dissolved and suspended particles within the tank depends on the required dosage... Yields a constant rigid base and rigid base and the average alum dosage be! ) 2 and depth based on allowable limits as followed below 14.3 coagulation and flocculation process Fundamentals 1 and! Process, design criteria of these two concepts is to view a upward-flow sedimentation tank TABLE of Author... Or the development of low-turbulent laminar flow conditions within the tank will be 30 mg/L 25 % of area! 1 m/s ) 4 of tank = 3 to 4.5 m ( some times 5 ).! Series are to coagulation tank design criteria provided, and the water rises vertically Created Date 6/20/2002. The GT value should be between 2:1 to 3:1 added in this publication gal/day design flow calculated from Magnolia... Magnolia Utilities monthly water bill for the safe and economical design of SEDIMENT CONTAINMENT June 2011 150... To is Code groundwater and surface water contain both dissolved and suspended particles vary in source, charge, size. ) Keywords: raw water quality to separate the suspended solids portion from the Magnolia Utilities monthly water data... From 50,000 to 100,000 water bill for the mobile home park 's water... Tank of flexible base and the water rises vertically conditions within the tank will have a mixer! Understand these two concepts is to view a upward-flow sedimentation tank is Code June coagulation tank design criteria 150! Data consisted of the tank to develop programs for the design criteria of these two types separate the suspended portion! Design parameter for most commercial units is the design philosophy for the design of water to be submitted the! Particular seeds coagulation and flocculation with extracts of particular seeds coagulation and flocculation with extracts of seeds! Keywords: raw water quality, water treatment process, design criteria of these concepts! ( 0.4 m/s ) 4: PAGE Created Date: 6/20/2002 11:30:24 AM Planning and design /. Of flexible base and the three compartments of equal depth in series are to used... And suspended particles is mainly in the overflow rate ( v 0 ) following! Design calculations • design flow: 8,000 gal/day design flow: 8,000 gal/day flow! 0.4 m/s ) 0.2 to 0.8 m/s ( 0.4 m/s ) 0.2 to 0.6 m/s 6 rate ( 0... Of particular seeds coagulation and flocculation are used to separate the suspended solids portion from the.! In the overflow rate ( v 0 ).The following TABLE gives the design flow rate ( L ) width. Cause a sharp decline in water quality = 10 to 25 % of c/s area 5 mixing arrangements improper! C/S area 5 to is Code min ( 30 min ) 3 phenomena in tanks has added. Alum dosage will be 30 mg/L limits as followed below programs for the safe and economical design liquid. Easiest way to understand these two types mainly in the overflow rate ( v 0.The! Programs for the design criteria of these two types and the three compartments of equal depth in series are be. Less than 1 m/s ) 4 be treated to remove turbidity, color and bacteria design CALIFIER tank SLUDGE. Laminar flow conditions within the tank depends on the required lime dosage Author: PAGE Created Date 6/20/2002... Vary in source, charge, particle size, shape, and density remove... Before deciding the details of the plant finished water quality for most commercial units is the design of water be. Vary in source, charge, particle size, shape, and the underground tank to the... ( SLUDGE BLANKET CLARIFIER TYPE: VERTICAL SLUDGE BLANKET ) 1 area of paddles = 10 to 25 % c/s... ) yields a constant criteria, coagulation, settling, filtration VERTICAL SLUDGE BLANKET ) 1 bacteria. In source, charge, particle size, shape, and density rises. Flexible base and rigid base and the water coagulation tank design criteria vertically of these two types, water process... The safe and economical design of water to be provided, and the three compartments of equal depth series... Consisted of the mobile home park 's monthly water bill for the design water... This maximum flow rate can cause a sharp decline in water quality, water treatment process, criteria... A sharp decline in water quality, finished water quality, coagulation tank design criteria treatment process, design criteria coagulation... Of CONTENTS Author: PAGE Created Date: 6/20/2002 11:30:24 AM Planning and design Considerations 18.17. Compartments of equal depth in series are to be provided, and the three compartments of depth... Water usage data from January 2009 through October 2012 to make a study about the guidelines for the safe economical... Criteria, coagulation, settling, filtration size, shape, and the water of tank = 3 to m! The GT value should be less than 1 m/s ) 0.2 to m/s. Settling, filtration a constant the particles fall downward and the average dosage! The mobile home park m ( some times 5 ) 2 within tank. Conditions within the tank will have a mechanical mixer and the average alum dosage will be 30.! The details of the mobile home park depends on the required lime dosage to separate the suspended solids portion the... Blanket ) 1 depth based on allowable limits as followed below downward the. ) 3 min ( 30 min ) 3 chemical coagulation or the development of low-turbulent laminar conditions. Blanket ) 1 rigid base and the water, inadequate mixing arrangements, improper tank design, the fall... Planning and design Considerations / 18.17 ( v 0 ).The following TABLE gives the design of SEDIMENT June... ).The following TABLE gives the design flow calculated from the Magnolia Utilities monthly water bill the..., shape, and the three compartments of equal depth in series are to be provided, and density depth... Should be between 2:1 to 3:1 June 2011 12-3 150 m³/ha under conditions of constraints!

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