coagulation tank design criteria

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��$�cǷ��c� QJ��>�X$�) To know about the design philosophy for the safe and economical design of water tank. 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 trailer Velocity of flow = 0.2 to 0.8 m/s (0.4 m/s) 4. The GT value should be from 50,000 to 100,000. The failures in coagulation plant are due to incorrect does of the coagulant, inadequate mixing arrangements, improper tank design, etc. %PDF-1.4 %�� 0000005102 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. The size of the tank depends on the required lime dosage. <> 0000002615 00000 n “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 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; Contents 1. Coagulation and Flocculation Process Fundamentals 1 Coagulation and Flocculation . 0000005587 00000 n STORAGE TANK DESIGN AND CONSTRUCTION GUIDELINES rev. 4. 0000005454 00000 n The easiest way to understand these two concepts is to view a upward-flow sedimentation tank. endobj %�� Design criteria for Mechanical flocculator are furnished below. 0000003152 00000 n 5. "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>��=��$�� The rapid mixing tank will have a mechanical mixer and the average alum dosage will be 30 mg/L. 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 $35,000/tanks 0000003773 00000 n 0 4.5 Design of Sedimentation tanks 4.5.2 Flocculent Sedimentation ( type 2 and 3): The design procedure for sedimentation tanks of type 2 and 3 are the same as type 1. 0000004628 00000 n 0000005933 00000 n 0000024963 00000 n 9ֿ�2(�n$�,��m��p�wa��T��e��A��TZGA�V�S�^�p�ڴ>q�f��^�u~��M��O�Q��KQ�#��s��`��d&��X�ɓ*UofNJ�eդ. '��Q: �x�+$��G��V[X�zR]�rm qI7��u@�Nf|��݄I��Ξ�3�~o(� �W\&�l �< �h�3�:�|0�� Coagulation chemicals and appropriate feed rates must be selected according to operating experience with a given raw water or by simulation of the clarification step on a laboratory scale. 3. ;��1�p�4��95��0��2=j�+0��i��Ь�YC�T?�bw��m�>a��8��f��|�ݮ�iK��F�ڗX�^ҹe��~�7��d��$�vy��(~$:m2�dr��'�f�DZ��ݎA�ax[9M�Eֲ��T��?GU��S,�3ٶ�%��!��eϭ*7�� 6�i�M��e�ӷa\f��)�8ڑ\�Uᙛg�b��n��;��p�O�fW�G In this design, the particles fall downward and the water rises vertically. ��wG�-Ĳ�f�� ŬQ��F� O��Ig+l�P�S��Y��Y�q&�5G2��BWN{��p/��Y1�1��Fw�K=��$�H�v��*�i"��z�ym�U��զ�|�-p�l��MP�V�us��=��+�y��" ��B��w/��!��;t�G>� w��yVۚQ�� H�Ů��k��d�8�� $>{��8&HWP�S[�� vQ�e>:k��eq-�ù�(�df7�Y��s0%��:�Lugj��V2 |kr�6`��Q�QزdxdwE�Yg�Z�� n��Zj N�7,Ø|k S#�(l�\��#Ka��X�mY �,B�f�+ �5��0s츉�G�&��쩟TU�Y�q�I$��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"�!�:}�? Peripheral velocity of blades = (Should be less than 1 m/s ) 0.2 to 0.6 m/s 6. Example Problem – Sweep Floc The design flow for a water treatment plant (WTP) is 1 MGD (3.8x10 3 m 3 /d). Coagulation and Lime Softening Residuals Management / 18.26. 0000000016 00000 n Length (L) to width (We) ratio should be between 2:1 to 3:1. It is an essential operation designed to agitate force in fluid and coagulation. H��U�o�0篸Gx�볍1�4�k�j�*m+oU(!��@ 1 0 obj 112 27 Tapered flocculation is to be provided, and the three compartments of equal depth in series are to be used. Skill of facility operators 5. <> endobj Introduction 2. 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 �� 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- 88) 0000002357 00000 n 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. Management of Residuals from Ion Exchange and other Adsorptive Processes Used to Remove Inorganic Contaminants / … (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.) SECTION 12 - GUIDELINES FOR THE DESIGN OF SEDIMENT CONTAINMENT June 2011 12-3 150 m³/ha under conditions of land constraints. To make a study about the guidelines for the design of liquid retaining structure according to IS Code. Surface waters must be treated to remove turbidity, color and bacteria. 0000015275 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! Planning and Design Considerations / 18.17. xref 4 0 obj %%EOF Design Information Membrane Process Residuals / 18.51. Groundwater and surface water contain both dissolved and suspended particles. DESIGN CALIFIER TANK (SLUDGE BLANKET CLARIFIER TYPE : VERTICAL SLUDGE BLANKET) 1. �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:? The theoretical mean hydraulic detention time of the tank will be 1 minute. ... and time (T) yields a constant. Title: TABLE OF CONTENTS Author: PAGE Created Date: 6/20/2002 11:30:24 AM Keywords: raw water quality, finished water quality, water treatment process, design criteria, coagulation, settling, filtration. 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. 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. D�� !�Z�Mi�sw��;��Ӑu��e�wt~�Pt@�PAƌ0. 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 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. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 0000024714 00000 n 2. 114 0 obj<>stream Design Calculations • Design Flow: 8,000 gal/day Design flow calculated from the Magnolia Utilities monthly water bill for the mobile home park. %PDF-1.5 … Detention time 10 to 40 min (30 min) 3. endobj 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. 0000002117 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 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). 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 0000001455 00000 n <>>> normal design includes baffles that gently spread the flow across the total inlet of the tank and prevent short circuiting in the tank. 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 … 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** 3 0 obj ��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:$#�܀Z��t��v��AHxך�Yrd�*��u�cyY�f�'uA`?4�) 0000002040 00000 n Coagulation and flocculation are used to separate the suspended solids portion from the water. 0000001794 00000 n Suspended particles vary in source, charge, particle size, shape, and density. 0000015516 00000 n �J�R۶��|K��P�ڹT�Ž�-Dg ��e V� ۑ��CNK�k�L��&�Al#��[� 38nŢ;��ExF�4��=Dܮ\/[�_|Q�W� Raw Water Quality input 1 Turbidity = NTU 2 pH = 3 Alkalinity = mg/l as CaCO3 4 Temperature = oC 5 Fe mg/l 6 Mn mg/l 7 Total Hardness mg/l as CaCO3 15:26/25/10/2006 1/1 Design Clarifier Tank/Design Flow 0000015711 00000 n Design criteria 5.1. Total area of paddles = 10 to 25 % of c/s area 5. To develop programs for the design of water tank of flexible base and rigid base and the underground tank to avoid the tedious calculations. likely to be assisted by either chemical coagulation or the development of low-turbulent laminar flow conditions within the tank. The difference is mainly in the overflow rate (v 0) .The following table gives the design criteria of these two types. 0000000836 00000 n The breadth of sedimentation tank should be provided is 10 to 12 meters while the length of sedimentation tank should be at least 4 times the breadth of sedimentation tank. Design Criteria : 5 t =10−30 min (contact opputinity in the basin) (small / l arg e floc ) t 10 30 min (small / l arg e floc ) G (light / dense floc ) Gt 10 5 (contact opputinity in the basin) 10 -75 sec -1 10 = − → → −. 0000001588 00000 n The {keyword] are loaded with unique features and are ideal for places where there is a lot of water pollution.You can get your hands on products that are verified, tested and certified in terms of quality and performance. Design criteria for flocculator 1. 0000003587 00000 n x��}]o7��{��=J�Q��$`�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�:��* 112 0 obj<> endobj 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. Depth of tank = 3 to 4.5 m (some times 5) 2. stream :��{l-P��k��z�?��]]�TBb�$�ѽ��hFK�T��}G��f4�Qo�K��fZ��{��S�a�l��z��(�a 14.3 Coagulation and flocculation with extracts of particular seeds Exceeding this maximum flow rate can cause a sharp decline in water quality. After obtaining the area assume length and depth based on allowable limits as followed below. startxref If G is too great shear forces will prevent the formation of large floc If … 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 <]>> The depth of … 2. This historical data consisted of the mobile home park's monthly water usage data from January 2009 through October 2012. Flow Rate Q=150 m3/hr 2. 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. 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 … Water source 3. 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 0000002579 00000 n 2 0 obj Coagulation Testing Raw water analyses alone are not very useful in predicting coagulation conditions. Desired finished water quality 4. The critical design parameter for most commercial units is the design flow rate. The average flow rate from these 0000001371 00000 n �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��! 0000008603 00000 n 0000005330 00000 n 0000024483 00000 n Design recommendation for sloshing phenomena in tanks has been added in this publication. 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 HƵ =�'�z-r�M)B��2��P��u8ܗ�Z�ݢ��D�#�e%ŉIlb�o�2�� '�Ѡ�ɊN2-""3�T;��Qe- #L�kY��C��q*!��[%9��$�.�D6��rA|ג^�X��4�,$پ�(�|7BE;(ku@�R�G�L6" j��{�