design of coagulation and flocculation tank pdf

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Mechanical agitators most common Pneumatic agitators Baffled basins Design ¾The degree of mixing is based on the power provided which is measured by the velocity gradient. A common wall is shared between the flocculation.

These colloids result in a stable suspension.

. 25 September 2007 8 Rhine. To insure that a maximum. The size of the tank depends on the required lime dosage.

V Qt Let t 20 min. Flocculation is a water treatment process following coagulation which uses gentle stirring to bring the suspended particles together so they will form larger more settleable clumps called floc. Gul-E-Hina IEER UET Lahore 1 1.

The coagulation process chemically modifies the colloidal particles so that the stabilizing forces are reduced. Coagulation is a process to neutralize charges and then to. 20-30 sec-1 in 3rd tank Design Considerations of Flocculation.

143 Coagulation and flocculation with extracts of particular seeds. Groundwater and surface water contain both dissolved and suspended particles. Depth 3 m As 3 01 20 60 120 As 120 3 40 m2 Use circular basin 40 L W.

The flow of water in your treatment plant is 15 MGD million gallonsday. Speciﬁc topics include 1 the role of coagulation and ﬂocculation processes in water treatment 2 sta-bility of particles in water 3 coagulation theory 4 coagulation practice 5 coagulation of dissolved and organic constituents 6 ﬂocculation. Area of paddle10-20 vertical X-sectional area of tank Flocculation.

The impeller is driven by an electric motor and it revolves at a high speed 100-120 rpm inside the tank. Construction forms of flocculation tanks. The flocculation basin is to be divided into 3 sections of equal volume each section having constant velocity gradients of 50 35 25 s-1 respectively.

The designs by the MIT group would be considered as a possible replacement of the proposed design for the upgrading of the current severely overloaded facility. State-of-the-Practice in BiosolidsPolymer Blending for Biosolids Dewatering David W. Microscale Flocculation The flocculation of small particles less than 01 µm is caused by diffusion.

Practical Ways to Improve Performance Laboratory Testing George Tichenor PhD. 85 Temperature Mixing conditions In practice the coagulation process involves a rapid mixing flocculation sedimentation and filtration step. Det time hr 24 Flow gal day Tank Volume gal hr day 6.

Operation once the design is implemented in steel and concrete. 6 - 78 Fe3. The theoretical mean hydraulic detention time of the tank will be 1 minute.

The total flocculation time is to be 21 min and the water temperature is 15 C. This study is an applied-experimental study. This aggregation is called microscale flocculation or perikinetic flocculation.

The timber baffles have a roughness coefficient of 03. Two steps typically are employed. This data will be used to evaluate existing conditions against design criteria.

Fundamentals of Flocculation Chemistry HandlingStorage Dilution Water and Optimized Mixing Yong Kim PhD. The rapid mixing tank will have a mechanical mixer and the average alum dosage will be 30 mgL. Gul-E-Hina IEER UET Lahore 1.

Correct application of coagulation and flocculation depends upon these factors. A detention time of 05- 2 minute is also given. Double layer compression adsorption and charge neutralization sweep flocculation and inter-particle bridging.

Design and Construction of a Model Sedimentaion Tank Using Existing Slow Sand Filter For NDA Treatment Plant. G velocity gradient sec-1 W power imparted per unit volume of basin N-ms-m3 P power imparted N-ms. There are four main mechanisms for coagulation.

Coagulation and flocculation are used to separate the suspended solids portion from the water. Optimal design flocculators LB ratio LB 3 Vertical deep and narrow or horizontal long. There are four main mechanisms for coagulation.

It consist of a rectangular tank provided with an impeller fixed to an impeller shaft. 321 Coagulation In designing the Klapanunggal IPAM the type of coagulation that will be used is hydraulic coagulation with Aluminum sulfate coagulant. Facility view the existing facility as well as study the design of the proposed facility to be built in its place and given the opportunity to create their own alternative designs.

Design a flocculation tank to treat 01 m3sec Sol. Write the equation for theoretical detention time. Lecture 14 Coagulation Flocculation.

DESIGN OF FLOCCULATORS C 3 2 P d UVA for rotating paddles Where C. Water and water is then transferred to a flocculation tank provided with slow mixers. Methods and capacities in each unit of coagulation flocculation and sedimentation.

Double layer compression adsorption and charge neutralization sweep flocculation and inter-particle bridging. By ijesrt journal Water and Wastewater Engineering. Sweep flocculation is the primary.

Some of these steps are sometimes combined in water treatment practice. When coagulants are added the stabilised. First process in drinking water treatment coagulation is to destabilize the particles and allow them the potential to collide and stick together.

2 Devices ¾Agitation in rapid mixing and flocculation is performed by. 03-February-2016 Lecture 01 Engr. The rate of flocculation is relative to the rate at which the particles diffuse.

Suspended particles vary in source charge particle size shape and density. Coagulation Chemical treatment typically is applied prior to sedimentation and filtration to enhance the ability of a treatment process to remove particles. 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.

03-February-2016 Lecture 01 Engr. The value of pH during coagulation optimal pH-range for Al. 25 September 2007 46 Plug flow Completely mixed no mixing thus particle.

Thus the primary mechanism of aggregation is through Brownian motion. Coagulation Flocculation Sedimentation 1. After coagulation and flocculation removal of floc aggregates by sedimentation andor filtration.

In addition the design of each typical unit of the water treatment plant involves intake coagulation flocculation sedimentation filtration disinfection storage. They collect the clean clarified water which flows in tanks out of the settling tank. Your settling tank is 60 feet long 20 feet wide.

544 9 Coagulation and Flocculation the coagulation and ﬂocculation processes. Vary to optimize flocculation efficiency function of geometry Need to determine Head loss Residence time Baffle spacing Number of baffles Human width More Design Considerations Even number of channels for AguaClara design to keep chemical dose controller near stock tanks but this may change if. The design flow for a water treatment plant WTP is 1 MGD 38x103 m3d.

FMany of the contaminants in water contain matter in the colloidal form. 4 - 10 Fe2.

Details Of Coagulation Tanks Flocculation Flocculation Is The Process Download Scientific Diagram