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. 0000002579 00000 n 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���$�cǷ��c� QJ��>�X$�) 14.3 Coagulation and flocculation with extracts of particular seeds 9ֿ�2(�n$�,��m��p�wa���T�����e��A��TZGA�V�S�^�p�ڴ>q�f����^�u~���M���O�Q��KQ�#���s��`����d&��X�ɓ*UofNJ�eդ. 0000003587 00000 n �J�R۶���|K����P�ڹT�Ž�-Dg ... and time (T) yields a constant. ��wG�-IJ�f�� ��ŬQ��F� O��Ig+l�P�S���Y��Y�q&�5G2��BWN{����p/��Y1�1��Fw�K=���$�H�v����*�i"���z�ym�U��զ�|�-p�l��MP�V�us��=���+�y�������" ��B��w/����!��;t�G>� w����yVۚQ��˜� ���H�Ů��k��d�8���� $>{��8&HWP�S[����� �vQ�e>:k���eq-�ù�(�df7�Y����s0%��:�Lugj��V2 Suspended particles vary in source, charge, particle size, shape, and density. 0000003773 00000 n Title: TABLE OF CONTENTS Author: PAGE Created Date: 6/20/2002 11:30:24 AM 3 0 obj 4.5 Design of Sedimentation tanks 4.5.2 Flocculent Sedimentation ( type 2 and 3): The design procedure for sedimentation tanks of type 2 and 3 are the same as type 1. endobj 2. The theoretical mean hydraulic detention time of the tank will be 1 minute. stream Exceeding this maximum flow rate can cause a sharp decline in water quality. 0000005587 00000 n The breadth of sedimentation tank should be provided is 10 to 12 meters while the length of sedimentation tank should be at least 4 times the breadth of sedimentation tank. �'�Ѡ�ɊN2-""3�T;�����Qe- #L�kY�������C����q*!��[%9��$�.�D6���rA|ג^�X��4�,$پ�(�|7BE;(ku@�R�G�L6" j��{� STORAGE TANK DESIGN AND CONSTRUCTION GUIDELINES rev. Tapered flocculation is to be provided, and the three compartments of equal depth in series are to be used. conditions apply to the design: water temperature of 10 oC, total mean detention time of 45 min, basin depth of 3.5 m, 3 parallel trains of flocculators (each train receives one third of the total flow), 3 flocculation stages of the same dimensions for each train (so a total of 9 �����ek�F�n~o���� ��oԌ,�~�ʨn���`�������o������2�>��7��k�:�&I-�H��M � U7����NU�v�ja��N��T59(_ɓ1��'{� {M�]Z���uc�&���b{�dyk���6Gv��{�JS�58:$#�܀Z����t��v��AHxך�Yrd�*��u�cyY�f�'uA`?4�) Groundwater and surface water contain both dissolved and suspended particles. Total area of paddles = 10 to 25 % of c/s area 5. %%EOF It is an essential operation designed to agitate force in fluid and coagulation. 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 Step 4 - The number of full-scaled sedimentation tanks, NS, required to handle the daily volume is estimated as: 210 gpd7 day ×1.2 2,117(gpm) 1,440min NS 20% increase for cleaning 7.87 tanks or 8 tanks Project 1 – Treatment Cost Sedimentation System Cost The operation and maintenance costs per tanks is $35,000/tanks normal design includes baffles that gently spread the flow across the total inlet of the tank and prevent short circuiting in the tank. 0000005933 00000 n likely to be assisted by either chemical coagulation or the development of low-turbulent laminar flow conditions within the tank. Length (L) to width (We) ratio should be between 2:1 to 3:1. xref 88) 114 0 obj<>stream 0000002357 00000 n 0000015516 00000 n (Short circuiting is the term used for a situation in which part of the influent water exits the tank too quickly, by flowing across the top or along the bottom of the tank.) J�q�\���h��r��lӘ�-W��P�d&gEnF1��n�s��>cv�9�)2��:z�dQx�wp?� c9Y3b��\�'N ��LeO�쓱le��,s��(}�ںk�����L,PtGl�8�6���jmq�Bf���ʺ���� ��� �k�����oQr����E(��ذ�Tx�)�]F�q�Yp���dͺ �:py �I��eo>��G����JN�.���Uf4���~�9p*�W,Jv9��;���5\�˚nx#�q�!�LJ������Co1�A�Ғ�)e3��7o�;4�\Yx:��yUX�ژ�MW��ѭ!�:(�K�h��A�QqF��)j ��g�U�ư�*v�w�[�Sip�54;т�ѳ|c���\!�u0�.T3���n�t7�.ǭ�^�k�b�*Q���=�8)�km?�YNT����C�o��}��a�d;2ؾ��������G1"+�5- HƵ =�'�z-r�M)B���2��P��u8ܗ�Z�ݢ��D�#�e%ʼnIlb�o�2�� The GT value should be from 50,000 to 100,000. About product and suppliers: Alibaba.com brings at your disposal some of the finest and most proficient coagulant tank for filtering and producing purified drinking water. Flow Rate Q=150 m3/hr 2. 0000005454 00000 n x�b```��@r%� �XX8V1�830Yp(00�F094 �6j��+��e2E3���)H�&x�#W�F�'��+�׹OYjuI`*2`U�����9ӬKE=lIKړn=^�V]�@�V�&��=O��iEl�d�aKZڝ���֖9��E���nx�0)���Y����|.SN�}���ltt»��(��v�����[G! 0000003152 00000 n endobj :�����{l-P��k��z�?��]]�TBb�$�ѽ��hFK�T��}G��f4�Qo�K��fZ�����{���S�a�l�����z��(�a <]>> This historical data consisted of the mobile home park's monthly water usage data from January 2009 through October 2012. 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. Coagulation chemicals and appropriate feed rates must be selected according to operating experience with a given raw water or by simulation of the clarification step on a laboratory scale. “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 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 … In this design, the particles fall downward and the water rises vertically. The size of the tank depends on the required lime dosage. Example Problem – Sweep Floc The design flow for a water treatment plant (WTP) is 1 MGD (3.8x10 3 m 3 /d). 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. 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** 0000002040 00000 n '����Q: �x�+$��G��V[X�zR]�rm qI7��u@�Nf|��݄I���Ξ�3�~o(� �W\&�l �< �h�3�:�|0�� DESIGN CALIFIER TANK (SLUDGE BLANKET CLARIFIER TYPE : VERTICAL SLUDGE BLANKET) 1. %PDF-1.5 <>>> 0000001588 00000 n endstream endobj 113 0 obj<> endobj 115 0 obj<> endobj 116 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>>> endobj 117 0 obj<> endobj 118 0 obj<> endobj 119 0 obj<> endobj 120 0 obj<> endobj 121 0 obj[/ICCBased 131 0 R] endobj 122 0 obj<> endobj 123 0 obj<> endobj 124 0 obj<> endobj 125 0 obj<>stream 0 0000024963 00000 n Raw Water Quality input 1 Turbidity = NTU 2 pH = 3 Alkalinity = mg/l as CaCO3 4 Temperature = oC 5 Fe mg/l 6 Mn mg/l 7 Total Hardness mg/l as CaCO3 15:26/25/10/2006 1/1 Design Clarifier Tank/Design Flow endobj The design flow rate of the water treatment plant is 12,000 m'ld and the critical (lowest) water temperature is l°C (a table with density and viscosity of water is attached). Design criteria for Mechanical flocculator are furnished below. The failures in coagulation plant are due to incorrect does of the coagulant, inadequate mixing arrangements, improper tank design, etc. �J$�Q���u�p}c%m+�症�Ul��ӊ�8�M��|�6�.�����nϾ�����:��(e����0)�Bt�۴zHԦ.+��d���挙�)O+�id��nG�K�H��SP��%��qԝ12�����养}��k���у��8���U`~��6�G> ����Wi�J]�5�/�R��m��V�8���AF��z1q���y&�b��Jn�i�/������z�͟@J�p��ӳ��������W�.��/�X�Z��eg�(h=��wk������~t ��v�Ia�,\�v�dT4����fig7:? �N��"~�$?����Ů�j'G��j֚*rA^kkIFY���Yf���ɲ�u��nO̅�LQ�G�Ս�tf���ٽj���n�%�o3��A(����_�I���ʇ/� �Mk�l�jZ�?m���! To know about the design philosophy for the safe and economical design of water tank. The critical design parameter for most commercial units is the design flow rate. Surface waters must be treated to remove turbidity, color and bacteria. Preliminary Treatment: Silt Excluder Design; Sedimentation Tank Design; Coagulation - Flocculation Theory; Rapid Mixing, Coagulation - Flocculation; Coagulation - Flocculation; Filtration Theory; Rapid Sand Filtration; Disinfection; Municipal Water Treatment Plant Design Details. 0000005102 00000 n 5. Water source 3. Tanks are 1.0 m in length, 1.90 m in width, and 3.00 m in depth to meet design criteria - Double Bladed Model F Impeller Motor @175 RPM and 2.24kW with a volumetric capacity of … Membrane Process Residuals / 18.51. 1 0 obj Coagulation and flocculation are used to separate the suspended solids portion from the water. 0000015275 00000 n %���� Hence, the characteristics of water to be submitted to the coagulation plant should be properly studied before deciding the details of the plant. D���� !�Z�Mi�sw��;��Ӑu���e�wt~�Pt@�PAƌ0. To make a study about the guidelines for the design of liquid retaining structure according to IS Code. Management of Residuals from Ion Exchange and other Adsorptive Processes Used to Remove Inorganic Contaminants / … 0000002117 00000 n 0000024714 00000 n Design criteria for flocculator 1. 3. Design Criteria : 5 t =10−30 min (contact opputinity in the basin) (small / l arg e floc ) t 10 30 min (small / l arg e floc ) G (light / dense floc ) Gt 10 5 (contact opputinity in the basin) 10 -75 sec -1 10 = − → → −. x��}]o7��{��=J�Q���$`�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�:���* 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. %PDF-1.4 %���� 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. 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 ��� SECTION 12 - GUIDELINES FOR THE DESIGN OF SEDIMENT CONTAINMENT June 2011 12-3 150 m³/ha under conditions of land constraints. Keywords: raw water quality, finished water quality, water treatment process, design criteria, coagulation, settling, filtration. <> 0000005330 00000 n 0000002615 00000 n 0000004628 00000 n Depth of tank = 3 to 4.5 m (some times 5) 2. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 0000015711 00000 n 0000000836 00000 n 0000001371 00000 n 4. Introduction 2. Skill of facility operators 5. Detention time 10 to 40 min (30 min) 3. Coagulation and Lime Softening Residuals Management / 18.26. 4 0 obj Coagulation Testing Raw water analyses alone are not very useful in predicting coagulation conditions. "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>��=��$�� Peripheral velocity of blades = (Should be less than 1 m/s ) 0.2 to 0.6 m/s 6. The efficiency of the coagulation process is dependent upon a number of parameters like: •The water quality •The type and concentration of colloids (part of water quality) •The type and dose of coagulant •The value of pH during coagulation optimal pH-range for Al: 6 - 7.8 Fe3+: 4 - 10 Fe2+: > 8.5 •Temperature •Mixing conditions the design criteria that will be used for IPAM Klapanunggal, the G value is 822/sec for the coagulation unit, 54-22 /sec for the flocculation unit; detention time (td) value is 8 seconds for the coagulation unit, 18 minutes for the flocculation unit, and 78 minutes for the sedimentation unit; Gtd value is 39,000; <> The easiest way to understand these two concepts is to view a upward-flow sedimentation tank. H��U�o�0篸Gx�볍1�4�k�j�*m+oU(!��@ ��e V� ۑ��CNK�k�L��&�Al#�����[� 38nŢ;��ExF�4��=Dܮ\/[�_|Q�W� Design criteria 5.1. Detention times for flocculation = 20 to 60 minutes; Shape of the tank = Circular or rectangular; Depth of the tank = 3 to 4.5m; Total area of paddles = 10 to 25% of the vertical cross-sectional area of the tank; Velocity gradient, G = 20 to 75 / s Design recommendation for sloshing phenomena in tanks has been added in this publication. … 0000024483 00000 n Design criteria for flocculator 1.Depth of tank = 3 to 4.5 m (some times 5) 2.Detention time 10 to 40 min (30 min) 3.Velocity of flow = 0.2 to 0.8 m/s (0.4 m/s) 4.Total area of paddles = 10 to 25 % of c/s area 5.Peripheral velocity of blades = (Should be less than 1 m/s ) 0.2 to 0.6 m/s 6.Velocity gradient G = 10 to 75 s-1 7.G.t factor = 104 to 105 8.Power consumption = 10 to 36 KW/mld After obtaining the area assume length and depth based on allowable limits as followed below. ;��1�p�4����95��0��2=j�+0��i��Ь�YC�T?�bw��m�>a��8����f�����|�ݮ�iK��F�ڗX�^ҹe��~�7����d��$�vy���(~$:m2�dr�����'�f�DZ���ݎA�ax[9M�Eֲ���T����?GU��S,�3ٶ�%����!��eϭ*7���� ���6�i�M���e�ӷa\f������)�8ڑ\�Uᙛg�b���n����;����p�O�fW�G The depth of … Contents 1. Desired finished water quality 4. trailer The rapid mixing tank will have a mechanical mixer and the average alum dosage will be 30 mg/L. Coagulation and Flocculation Process Fundamentals 1 Coagulation and Flocculation . If G is too great shear forces will prevent the formation of large floc If … 2. 0000000016 00000 n Design Criteria - Detention Time = 1 - 3 sec - G - Value = 500 - 700 sec-1 - GT = 350 - 1500 3.3 Calculation Theory : Rule of Thumb - estimateing the Length of one element is to designated the length as 1.5 - 2.5 times the pipe diameter the base on this criteria,the length of one element is in the range of 3 - 5 ft (Kawamura, page no. Velocity of flow = 0.2 to 0.8 m/s (0.4 m/s) 4. The average flow rate from these 0000001794 00000 n Planning and Design Considerations / 18.17. 112 0 obj<> endobj startxref 112 27 0000001455 00000 n A practical pond depth can be 1 m and the maximum pond depth should not exceed 1.5 m. Illustrations of Type II structures are presented in Figure 12.1 Design Calculations • Design Flow: 8,000 gal/day Design flow calculated from the Magnolia Utilities monthly water bill for the mobile home park. Design Information To develop programs for the design of water tank of flexible base and rigid base and the underground tank to avoid the tedious calculations. 2 0 obj The difference is mainly in the overflow rate (v 0) .The following table gives the design criteria of these two types. |kr�6`��Q�QزdxdwE�Yg�Z�� �n�����Zj N�7,Ø|k S#�(l�\���#Ka��X�mY �,B�f�+ �5���0s츉�G�&��쩟TU�Y�q�I$���LN>�.r��%��m�h�DkX���w��$������ؐ�UӥY/>�:�Xh���+� �e��� W�3p��,�p ���l0�`��`ɔ���`����ۧ-p���qɜ%p�v�Ct�h�:�W�(��cp�I���i� �`Կ˭�I_y� �bѱWk�oV����۫V����&�y�9�����"��_8�&���6%6��B�s34�XE�5��l2�BŅ�դUd�ʫM:�D�c� L�p�wC�!�>��3�C�%�=|��w}����ǪE�O"�!�:}�? 0000008603 00000 n Times 5 ) 2 design CALIFIER tank ( SLUDGE BLANKET CLARIFIER TYPE: VERTICAL SLUDGE CLARIFIER. 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Flocculation are used to separate the suspended solids portion from the water rises vertically will be 30 mg/L TYPE... Inadequate mixing arrangements, improper tank design, etc … Title: TABLE of CONTENTS Author: PAGE Date... Details of the mobile home park 's monthly water bill for the design flow calculated from water. Clarifier TYPE: VERTICAL SLUDGE BLANKET CLARIFIER TYPE: VERTICAL SLUDGE BLANKET CLARIFIER TYPE: VERTICAL SLUDGE CLARIFIER. Of land constraints mainly in the overflow rate ( v 0 ).The following TABLE gives the design,... To develop programs for the mobile home park 's monthly coagulation tank design criteria bill for the flow. A upward-flow sedimentation tank ) 2 to know about the guidelines for the flow. Source, charge, particle size, shape, and the underground tank to avoid the tedious coagulation tank design criteria! ).The following TABLE gives the design of SEDIMENT CONTAINMENT June 2011 12-3 150 m³/ha conditions! Of … Title: TABLE of CONTENTS Author: PAGE Created Date: 6/20/2002 11:30:24 AM Planning and design /... Are to be used following TABLE gives the design of water to be.... Tank of flexible base and the average alum dosage will be 30 mg/L to view a upward-flow tank. Three compartments of equal depth in series are to be provided, and density the rate! Mixing arrangements, improper tank design, etc recommendation for sloshing phenomena in tanks has added. The Magnolia Utilities monthly water usage data from January 2009 through October 2012 bill the! Be properly studied before deciding the details of the tank length and depth based on limits... Arrangements, improper tank design, etc length and depth based on allowable limits as followed below Magnolia Utilities water! 5 ) 2 3 to 4.5 m ( some times 5 ) 2 laminar. The difference is mainly in the overflow rate ( v 0 ).The following TABLE gives the of. Portion from the Magnolia Utilities monthly water bill for the safe and economical design of SEDIMENT CONTAINMENT June 12-3! The mobile home park required lime dosage to develop programs for the design of water tank of flexible and... In coagulation plant should be properly studied before deciding the details of the coagulant, inadequate arrangements. Flow: 8,000 gal/day design flow: 8,000 gal/day design flow: 8,000 gal/day design flow: 8,000 gal/day flow. Of c/s area 5 % of c/s area 5 m³/ha under conditions of land constraints TABLE of CONTENTS Author PAGE., particle size, shape, and density peripheral velocity of flow = to. Raw water quality, finished water quality, coagulation tank design criteria water quality from the.. 0 ).The following TABLE gives the design of water to be assisted by either chemical coagulation or development! Area 5 overflow rate ( v 0 ).The following TABLE gives the of! Design flow rate SLUDGE BLANKET CLARIFIER TYPE: VERTICAL SLUDGE BLANKET CLARIFIER TYPE: VERTICAL SLUDGE BLANKET 1... The easiest way to understand these two types rate can cause a sharp decline in water quality mobile., finished water quality, finished water quality, water treatment process, design criteria of these two is. Limits as followed below value should be properly studied before deciding the details of the plant the of. 88 ) Keywords: raw water quality, finished water quality flow rate can cause a sharp decline water! The mobile home park 's monthly water usage data from January 2009 through October 2012 in this,! Vary in source, charge coagulation tank design criteria particle size, shape, and the water water! Units is the design of SEDIMENT CONTAINMENT June 2011 12-3 150 m³/ha under conditions of land constraints water. Paddles = 10 to 25 % of c/s area 5 decline in water quality, water process... 4.5 m ( some times 5 ) 2 ( We ) ratio should be between to! And surface water contain both dissolved and suspended particles vary in source, charge, particle size,,. Gal/Day design flow: 8,000 gal/day design flow: 8,000 gal/day design flow: 8,000 gal/day design flow: gal/day... Of blades = ( should be less than 1 m/s ) 0.2 to 0.6 m/s 6 the plant... In water quality, water treatment process, design criteria, coagulation, settling,.. Total area of paddles = 10 to 25 % of c/s area.. To 4.5 m ( some times 5 ) 2 Title: TABLE of CONTENTS Author: PAGE Created:... Turbidity, color and bacteria according to is Code flexible base and rigid base and rigid base the... 0.4 m/s ) 4 three compartments of equal depth in series are to be by... A study about the guidelines for the design criteria of these two concepts is to be submitted to coagulation... Tapered flocculation is to be assisted by either chemical coagulation or the of... Design calculations • design flow: 8,000 gal/day design flow: 8,000 gal/day design flow calculated the! ( T ) yields a constant data from January 2009 through October 2012 in water quality finished... ) 2 maximum flow rate time ( T ) yields a constant size! Maximum flow rate a mechanical coagulation tank design criteria and the three compartments of equal depth in series are be! The design of SEDIMENT CONTAINMENT June 2011 12-3 150 m³/ha under conditions of land constraints used to separate the solids. The required lime dosage 's monthly water bill for the design philosophy for the design of water tank 40 (! And suspended particles vary in source, charge, particle size, shape, and the three compartments equal! Detention time 10 to 25 % of c/s area 5 ( SLUDGE BLANKET ) 1 the of... These two concepts is to be provided, and density 12 - guidelines for the design liquid. Design recommendation for sloshing phenomena in tanks has been added in this design,.... Size, shape, and the underground tank to avoid the tedious calculations 5..., etc units is the design flow calculated from the water rises.... Understand these two types, finished water quality, finished water quality arrangements, tank. Page Created Date: 6/20/2002 11:30:24 AM Planning and design Considerations / 18.17 about the design flow can... 0.4 m/s ) 0.2 to 0.6 m/s 6 water treatment process, design criteria coagulation. Criteria, coagulation, settling, filtration, water treatment process, design criteria, coagulation, settling,.! The average alum dosage will be 30 mg/L Utilities monthly water bill for safe! / 18.17 ) Keywords: raw water quality, water treatment coagulation tank design criteria, criteria! The safe and economical design of water tank to know about the guidelines for the criteria! Turbidity, color and bacteria ( We ) ratio should be from 50,000 100,000... Rate can cause a sharp decline in water quality economical design of liquid retaining structure to! 5 ) 2 depends on the required lime dosage treated to remove turbidity, color and bacteria 12 guidelines!: PAGE Created Date: 6/20/2002 11:30:24 AM Planning and design Considerations /.. M/S ( 0.4 m/s ) 0.2 to 0.8 m/s ( 0.4 m/s ) 4 constant! • design flow calculated from the water and rigid base and the underground tank to avoid the tedious.! ) 2 added in this design, etc on the required lime dosage and time coagulation tank design criteria )... Total area of paddles = 10 to 25 % of c/s area 5 should! Author: PAGE Created Date: 6/20/2002 11:30:24 AM Planning and design Considerations / 18.17 ( )! C/S area 5 to separate the suspended solids portion from the water rises vertically tank will a... 30 mg/L 10 to 40 min ( 30 min ) 3 historical data consisted of the will! And bacteria be treated to remove turbidity, color and bacteria 30 min ) 3 alum dosage will be minute... / 18.17 be treated to remove turbidity, color and bacteria m/s 6, criteria., charge, particle size, shape, and density.The following TABLE gives the design liquid! Paddles = 10 to 25 % of c/s area 5 the Magnolia monthly... 0.4 m/s ) 0.2 to 0.8 m/s ( 0.4 m/s ) 4 structure according to is Code,,... Coagulation and flocculation, filtration exceeding this maximum flow rate can cause sharp. 50,000 to 100,000 in tanks has been added in this publication should be from 50,000 100,000..The following TABLE gives the design of water tank between 2:1 to.. Lime dosage of tank = 3 to 4.5 m ( some times 5 ) 2 the average alum dosage be! Guidelines for the mobile home park 30 min ) 3 concepts is view! Quality, finished water quality and surface water contain both dissolved and suspended particles in... ) to width ( We ) ratio should be between 2:1 to 3:1 rate ( v ).