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    • Introduction to Wastewater Clarifier Design

      thickening zone, where the settled solids are accumulated forming a dense layer of sludge (sludge blanket). Clarifier effluent of low solids concentration is collected from the top of the clarification zone over overflow qualitys and into collection channels where it conis veyed to the tank outlet. The sludge collected at the bottom of the larifier is removedc for further treatment at the

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    • Solids Retention Time (SRT) Calculation Worksheet

      Waste Sludge Concentration 6. Waste Sludge Flow 7. Effluent TSS Concentration 8. Average Wastewater Flow MGD Days Volume feet MG 9. Calculated SRT Volume Diameter Water Depth Directions Input numbers yellow boxes Date calculated SRT orange box Output calculation green boxes 4. MLSS or MLVSS Concentration L quot;Arial,Italicquot; 8wq wwtp7 39 quot; 2/26/13 C quot;Arial,Italicquot; 8 pca.state.mn

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    • Slurry Pump Calculator Freight Metrics

      4.3.1 Head Ratio (Hr) 4.3.2 Efficiency Ratio (Er) 4.3.3 Speed @ Design Flow rpm 4.3.4 Speed @ Normal Flow rpm 4.3.5

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    • CHAPTER 6 DESIGN AND CONSTRUCTION OF SLUDGE

      Thus, the solids load entering the sludge thickener becomes 112.1 The solids load escaping in the liquid portion from the thickener is taken as 11.2 The solids load leaving the thickener becomes 100.9. In the dewatering centrifuge, solids load from polyelectrolyte is 0.8 Thus solids load entering the dewatering centrifuge is 101.7 The solids load in the dewatered cake

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    • SLUDGE DEWATERING SNF Holding Company

      It is also very easy to concentrate this type of sludge with a static thickening step just befo re dewatering. The drawback is that this sludge ferments very easily. 1.2.2. Biological sludge Biological sludge comes from the biological treatmentof the wastewater. It is made of a mixture of microorganisms. These microorganisms, mainly bacteria, amalgamate in bacterial flocsthrough the synthesis

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    • Inclined Plate Clarifier (Parallel Plate, Lamella

      Sludge Thickening or Pyramid Hopper NOTE Plate spacing can be set to any number desired. The recommended plate spacing is typically 2quot; but higher (and lower, down to as little as 1quot;) can be specified if required by your application. Plate spacing is usually determined by the quantity of TSS present. Be cautious when specifying plate spacing less than 2quot;. TSS and hindered settling rates must

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    • Meimurske Vode

      SLUDGE THICKENER 7. TOTAL SLUDGE THICKENER Concreting of the reinforced concrete pillars inside the basin of quadrilateral shell, position, dimensions and shape according to the draft, plastic concrete C 40/50, Test for water tightness. Do not allow any leakage of water from the facility. Watertightness will be measured soaking clean water up to the level, topping up the the first 24 hours

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    • Quick evaluation pilot 3 UWWTP Kizilcahamam

      Mechanical thickening will reach MLSS concentration of 40 g/l. The belt filter press will raise the MLSS concentration to 250 g/l. Conclusion According to Tauw calculation tool the design sludge production should be 1,300 kg MLSS/day (about twice as high). There is a difference in sludge age. Draft Reference N001 4615420PTK V01 4\10 Quick evaluation pilot 3 Kizilcahamam version 1 Draft

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    • TECHNOLOGY FACT SHEETS FOR EFFLUENT TREATMENT PLANTS

      The sludge thickening unit typology is directly linked to the characteristics of sludge to be treated. Physical, chemical and biological factors of sludge significantly influence one or another thickening process application, as well as their operation conditions. Major factors that influence Solid particle size and shape. Viscosity and temperature. Septicity and dissolved oxygen. Natural or

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    • Thickening Resource Book

      The feed may enter into the sludge bed if the flocculation must be completed by the solids contact means, or it may enter above the pulp level if it is sufficiently flocculated to produce the desired clarity and the underflow density. The increase in flocculation efficiency realised in high rate thickeners may increase in a bulk settling rate 2 to 10 times over that obtained in a conventional

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    • California Water Environment Association

      Thickening electricity use gravity, gravity belt and drum (kWh/Mg sludge dry) Thickening electricity use centrifuge (kWh/Mg sludge dry) Typical design electricity use for anaerobic digester mixing systems (kW/m3 of digester volume) Metcalf amp; Eddy, 2003, p. 1519 Carbon as a % of TVS Total nitrogen (% dry weight) TVS(% dry weight) Organic carbon (% dry weight) Landfill Disposal CN

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    • Wastewater Math and Excel Equations

      and Excel Equations. How to Write Equations in Excel Writing Formulas Using Sum, Average, Round Freeze Panes Easier viewing in large spreadsheets Creating Trend Graphs Allows for Viewing Trends in Large Sets of Data Examples in Excel for Each Upcoming Problem Set. Reading Plans and Calculating Tank Dimensions Calculate the total volume, in million gallons (MG

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    • Introduction to Sludge Handling, Treatment and Disposal

      SLUDGE THICKENING. Thickening is provided to reduce the volume of sludge. Two basic types of thickeners work by gravity or flotation and use either continuous or batch processes. Gravity thickeners are essentially settling tanks with or without mechanical thickening devices (picket fence type). Plain settling tanks can produce solids contents in sludges of up to 8.0 percent for primary sludges

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    • Activated Sludge Waste Water Treatment Calculations with

      Activated sludge waste water treatment calculations are made easy in U.S. or S.I. units with the Excel spreadsheets that can be downloaded through links in this article. The Excel formulas use parameters like biochemical oxygen demand (BOD), waste water flow rates, and total suspended solids concentrations to make activated sludge aeration tank design and operation calculations.

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    • (PDF) THICKENER DESIGN, CONTROL AND DEVELOPMENT

      The AMIRA P266 'Improving Thickener Technology' series of projects has sought to provide a firm scientific basis for feedwell and thickener design, a requirement as pressures on water usage in the

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    • Wastewater Math and Excel Equations

      and Excel Equations. How to Write Equations in Excel Writing Formulas Using Sum, Average, Round Freeze Panes Easier viewing in large spreadsheets Creating Trend Graphs Allows for Viewing Trends in Large Sets of Data Examples in Excel for Each Upcoming Problem Set. Reading Plans and Calculating Tank Dimensions Calculate the total volume, in million gallons (MG

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    • (PDF) THICKENER DESIGN, CONTROL AND DEVELOPMENT

      The AMIRA P266 'Improving Thickener Technology' series of projects has sought to provide a firm scientific basis for feedwell and thickener design, a requirement as pressures on water usage in the

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    • Beginners Guide to Thickeners Outotec

      Beginners Guide to Thickeners; Beginners Guide to Thickeners. Thickening is a process where a slurry or solid liquid mixture is separated to a dense slurry containing most of the solids and an overflow of essentially clear water (or liquor in leaching processes). The driving force for the separation is gravitational, where the differences in phase densities drive the separation of the solids

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    • Clarifier Sizing Spreadsheet HydroFlo Tech

      The spreadsheet operates on Microsoft Excel 2003 or later. clarifier sizing calculations. Below is a sample shot of the spreadsheet. What is the Process Flow Rate 100.00 What is the Desired Hydralic Loading Ratio 0.39 NOTE The hydraulic loading ratio is typically set from .25 to .5 The lower the settling rate or specific gravity (of the settleable material) the lower the hydraulic loading

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    • Introduction to Sludge Handling, Treatment and Disposal

      SLUDGE THICKENING. Thickening is provided to reduce the volume of sludge. Two basic types of thickeners work by gravity or flotation and use either continuous or batch processes. Gravity thickeners are essentially settling tanks with or without mechanical thickening devices (picket fence type). Plain settling tanks can produce solids contents in sludges of up to 8.0 percent for primary sludges

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    • Measuring Settling Rates and Calculating Thickener Capacity

      In order to develop rational methods of measurement and laboratory testing, it becomes necessary to study the general phenomena of settling rates. Since it was desired to give the public the benefit of these methods at as early a date as possible, together with the knowledge of the general principles of slime settling necessary for a clear understanding of the laboratory tests, we have

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    • California Water Environment Association

      Thickening electricity use gravity, gravity belt and drum (kWh/Mg sludge dry) Thickening electricity use centrifuge (kWh/Mg sludge dry) Typical design electricity use for anaerobic digester mixing systems (kW/m3 of digester volume) Metcalf amp; Eddy, 2003, p. 1519 Carbon as a % of TVS Total nitrogen (% dry weight) TVS(% dry weight) Organic carbon (% dry weight) Landfill Disposal CN

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    • Quick evaluation pilot 3 UWWTP Kizilcahamam

      Mechanical thickening will reach MLSS concentration of 40 g/l. The belt filter press will raise the MLSS concentration to 250 g/l. Conclusion According to Tauw calculation tool the design sludge production should be 1,300 kg MLSS/day (about twice as high). There is a difference in sludge age. Draft Reference N001 4615420PTK V01 4\10 Quick evaluation pilot 3 Kizilcahamam version 1 Draft

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    • Motor Sizing Calculations Alaa Khamis

      Calculate the pulse speed in full step equivalents. Operating Pulse Speed [Hz] Starting Pulse Speed [Hz] Acceleration (Deceleration) Period [ms] f 2 f 1 t 1 1 Pulse Speed [TR kHz] Product Series Inertia Ratio A 30 RKSeries Except geared motor types 10 Maximum Model Motor Frame Size inch (mm) Acceleration/ Deceleration Rate TR [ms/kHz] A 1.10(28), 1.65(42), 2.36(60), 3.35(85) RKSeries 1.65(42

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    • Meimurske Vode

      SLUDGE THICKENER 7. TOTAL SLUDGE THICKENER Concreting of the reinforced concrete pillars inside the basin of quadrilateral shell, position, dimensions and shape according to the draft, plastic concrete C 40/50, Test for water tightness. Do not allow any leakage of water from the facility. Watertightness will be measured soaking clean water up to the level, topping up the the first 24 hours

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    • Formula Sheet for all Wastewater Operator Exams Revised 8

      Sludge flow, MGD = (Thickener loading, lbs/day/sf) x (Surface area, sf) (8.34) x (10,000) x (% solids) F092 Desired lbs of solids in aeration tank = (Daily solids addition, lbs/day) x (Sludge age, days) 6

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    • Slurry Pump Calculator Freight Metrics

      4.3.1 Head Ratio (Hr) 4.3.2 Efficiency Ratio (Er) 4.3.3 Speed @ Design Flow rpm 4.3.4 Speed @ Normal Flow rpm 4.3.5

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    • Improve Clarifier and Thickener Design and Operation

      The thickener area is also required for this calculation. Guess the thickener area for the first iteration. Several iterations of area may be required to achieve a practical thickener size and pumping rate. For a circular thickener with a 15.24 m (50 f t) dia. A= Pi r 2 = 182.4 m 2 (7) The applied solids feed rate can now be calculated as a flux see Eqs. 8a and 8b. Applied flux = G f = (x f

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    • Design and Operation of Final Clarifiers

      thickening/sludge removal zone (h4).When the SLR exceeds the limiting flux,the sludge storage zone (h3) expands to accumulate the sludge and limits its conveyance to the bot tom ofthe tank.The continued expansion of h3will result in the sludge interface reaching the effluent quality,causing a loss ofsolids (clar ification failure). During normal operation,the storage zone expands and contracts

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