Table of Contents
Clariflocculator is a combination of flocculation and clarification in a single tank. It has two concentric tanks where inner tank serves as a flocculation basin and the outer tank serves as a clarifier. As heavy particles settle to the bottom, the liquid flows radially upward in the clarifier zone,.
How do clarifiers work?
The clarifier works by permitting the heavier and larger particles to settle to the bottom of the clarifier. The particles then form a bottom layer of sludge requiring regular removal and disposal. Clarified water then proceeds through several more steps before being sent for storage and use.
What is clarification in water treatment?
Clarification is an essential step in a water or wastewater treatment process to remove suspended solids through gravity settling, providing a clarified liquid effluent.
What are the 3 stages of wastewater treatment?
There are three main stages of the wastewater treatment process, aptly known as primary, secondary and tertiary water treatment.
How do you create a Clariflocculator?
Design criteria of flocculator
- Depth of tank = 3 to 4.5 m.
- Detention period = 15 to 30 min.
- Velocity of flow = 0.2 to 0.8 m/s (normally 0.4m/s)
- Total area of paddle = 10 – 25% of cross-sectional area of tank.
- If the peripheral velocity of blade should be 0.2 to 0.6 m/s.
What is clarified water?
Clarified water is water which has undergone clarification to remove suspended solids and solid particles. Water clarification is used in the pre-treatment of drinking water, prior to further purification, and the treatment of municipal wastewater and industrial effluent.
What is primary and secondary treatment?
There are two basic stages in the treat- ment of wastes, primary and secondary, which are outlined here. In the primary stage, solids are allowed to settle and removed from wastewater. The secondary stage uses biological processes to further purify wastewater. Sometimes, these stages are combined into one operation.
What is the 1st step in primary treatment plant?
Wastewater Primary Treatment is the first step in the water treatment process meant for removing suspended solids (TSS), oil and grease, colour, and odour. The key components in this step are screens, grit chamber, flow equalization tank, and clarifier.
What are the 5 stages of water treatment?
These include: (1) Collection ; (2) Screening and Straining ; (3) Chemical Addition ; (4) Coagulation and Flocculation ; (5) Sedimentation and Clarification ; (6) Filtration ; (7) Disinfection ; (8) Storage ; (9) and finally Distribution.
What is the purpose of secondary clarifiers?
secondary clarifiers is to separate biological floc from the treated liquid waste stream. Secondary clarifiers are most often discussed in conjunction with suspended growth biological wastewater treatment systems.
What is the difference between primary and secondary clarifiers?
The primary clarifier is designed to dispose of inorganic solids floating at the surface. It also tackles solids settling at the bottom. In the secondary clarifier, 100 percent or nearly 100 percent of the sludge, is organic. In this clarifier, the sludge is compact-ready and significantly denser.
Where are clarifiers used?
A clarifier is generally used to remove solid particulates or suspended solids from liquid for clarification and (or) thickening. Concentrated impurities, discharged from the bottom of the tank are known as sludge, while the particles that float to the surface of the liquid are called scum.
What are primary clarifiers?
A circular tank in which wastewater is held for a period of time to allow heavier solids to settle to the bottom as sludge and lighter materials to float to the water surface as scum.
What is the first step in primary treatment?
Primary treatment in sewage treatment involves physical removal of particles (large and small) from the sewage through filtration and sedimentation. Initially floating debris is removed by sequential filtration. Then the grit (soil and small pebbles) are removed by sedimentation.
What is the minimum detention time of water in Clariflocculator?
Explanation: While designing a clariflocculator, the time assumed for the flocculation zone is 40 mins. This usually ranges from 10-40 mins. For a better and efficient process generally, the time is chosen as 40 mins.
What is the first step in clarification?
What is the first step in clarification? Explanation: Finely divided particles suspended in surface water repel each other because most of the surfaces are negatively charged. Coagulation is the first step to neutralize the charged particles and form flocs.
What is class 7 clarified?
Wastewater is passed through bar screens which remove large objects like rags, sticks, cans, plastic packets, napkins etc. Water then goes through Grit and Sand removal tank, where sand, grit and pebbles settle down. Water so cleared is called clarified water.
What are the various units in a Clariflocculator?
A solitary unit of Clariflocculator serves elements of both the clarifier and flocculator.It comprises of two concentric tanks – the internal tank fills in as a flocculation chamber while the external tank fills in as a clarifier chamber.
What does zero discharge actually refer to?
The principle of “zero discharge” is recycling of all industrial wastewater. This means that wastewater will be treated and used again in the process. Because of the water reuse wastewater will not be released on the sewer system or surface water.
What do you understand by Clariflocculator explain with neat sketch?
Clariflocculator is a combination of flocculation and clarification in a single tank. It has two concentric tanks where inner tank serves as a flocculation basin and the outer tank serves as a clarifier. As heavy particles settle to the bottom, the liquid flows radially upward in the clarifier zone,.
What is the difference between primary and secondary treatment in waste water treatment?
The main difference is the way each respective treatment is processed. Primary treatment works on sedimentation, where solids separate from the water through several different tanks. In contrast, secondary treatment uses aeration, biofiltration and the interaction of waste throughout its process.
Is done by Clariflocculator?
Clariflocculator is a combination of flocculation and clarification in a single tank. It has two concentric tanks where inner tank serves as a flocculation basin and the outer tank serves as a clarifier.
How do you size a clarifier?
In general, clarifiers are sized by the flow rate verses the separation chambers “effective” surface area (or, as it is more commonly called. the “projected” surface area). Therefore, the effectiveness of any clarifier is affected by the flow rate. The slower the flow, the better the results.
What is flocculation in water treatment plant?
Flocculation is the separation of a solution, commonly the removal of sediment from a fluid. The term is derived from floc, which means flakes of material; and when a solution has been flocculated, the sediment has formed into larger aggregated flakes, making them easier to see and remove.
