Flocculator Design Overview •Analysis of hydraulic flocculators •Ratio of maximum to average energy dissipation rate •Inefficiency of energy use due to nonuniformity of energy dissipation rate •The great transition at * Ø⁄ 5=5 •Flocculator Design •Head loss, collision potential, residence time
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 total flocculation time is to be 21 min and the water temperature is 15 °C. The timber baffles have a roughness coefficient of 0.3. A common wall is shared between the flocculation
Flocculation: Flocculation is a slow mixing process in which destabilized colloidal particles are brought into intimate contact in order to promote their agglomeration . The rate of agglomeration or flocculation is dependent upon the number of particles present, the relative volume which they occupy, and the velocity gradient (G) in the basin. The
Example : Flocculation tanks are to be designed for a total flow rate of 49,200 m3/d. The following 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
Flocculation Design — AguaClara 0.0.0 documentation - GitHub …
Below are design approaches for several of the different potential flocculator geometries. In all cases we will need equations relating head loss, velocity gradient, viscosity, and collision potential. Flocculators must operate effectively over a range of temperatures and the critical design temperature is the coldest operating temperature.
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. The GT value should be from 50,000 to 100,000. Tapered flocculation is to be provided, and the three compartments of equal depth in series are to be used.
•How would you design a flocculator for a target settled water turbidity? •How strong are flocs? What is Flocculation? •A process that transforms a turbid suspension of tiny particles into a turbid suspension of big particles!
accentuate tapered flocculation. The sedimentation tank is a rectangular horizontal flow tank of effective capacity 4.2 m 3, giving a nominal reten-tion time of 2h 20min. Tube settlers fill the tank and are of 50mm o.d. PVC and 1.15 m in length, inclined at an angle of 60° to the horizontal and arranged in an array of 25 over
Flocculation Basin - Waste Water Treatment
Design criteria for Mechanical flocculator are furnished below. 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 …
Flocculation - Mountain Empire Community College
Major task: establish uniform velocity profile across the entrance to the sedimentation tank; In many conventional treatment plants, flocculation and sedimentation tanks are coupled; The diffuser wall must have enough headloss to establish uniform discharge profile without creating turbulence and floc breakage . Hydraulic Flocculation . Three ...