Table of Contents
The Difference Between a Clarifier and a Thickener is subtle as they will visually look the same. Thickeners are used to concentrate solids, while clarifiers are used to purify liquids. A thickener will give you a high density underflow while a clarifier will not.
What is the difference between clarifier and classifier?
A settler that removes virtually all the particles from a liquid is known as a clarifier. whereas a device that separates the solids into two fractions is called a classifier. GRAVITY CLASSIFIERS Separate particles on the basis of size and the density of the fine particles (the same as that of the larger ones.)Nov 2, 2017
How does a thickener work?
Thickeners are mechanically continuous process equipment which operates on a particle/floccule sedimentation principle where in simplest terms the solids settle to the bottom of the thickener tank and the water overflows the tank.
How do you prevent denitrification in secondary clarifier?
Denitrification problems can be often controlled by increasing the recycle pump to reduce sludge blanket depth/sludge retention time in the clarifier.
What is a high rate thickener?
High-Rate Thickeners, or Clarifiers, recover immediately reusable process water for mineral and aggregate producers, as well as environmental contractors. This high level of water recovery keeps water consumption at sustainable levels, as well as drastically reduces the slurry volume reporting to waste ponds.
What does secondary treatment remove?
Secondary treatment removes the soluble organic matter that escapes primary treatment. It also removes more of the suspended solids. Removal is usually accomplished by biological processes in which microbes consume the organic impurities as food, converting them into carbon dioxide, water, and energy…
How could you remove heavy metals from polluted water economically?
Several methods have been used to remove heavy metals from contaminated water. They include chemical precipitation [17,18], ion exchange [19,20], adsorption [21,22], membrane filtration [23,24], reverse osmosis [25,26], solvent extraction [27], and electrochemical treatment [28,29].
Why is a secondary clarifier needed after an aeration tank?
The function of the secondary clarifier is to separate the activated sludge solids from the mixed liquor. These solids represent the colloidal and dissolved solids that were originally present in the wastewater. Some sludge is being removed continuously to be used as returned sludge in the aeration tanks.
What is thickening in mineral processing?
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). Size, shape, surface chemistry, and solids density all influence this process.
What is the difference between clarifier and 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. As heavy particles settle to the bottom, the liquid flows radially upward in the clarifier zone,.
How does an air classifier work?
An air classifier is an industrial machine which separates materials by a combination of size, shape, and density. It works by injecting the material stream to be sorted into a chamber which contains a column of rising air.
How do you calculate thickening rise?
Calculating Thickener Area: A = Thickener area in square feet per ton of dry solids thickened in 24 hours. F = Initial density (Parts Water to Solids by weight). D = Final density to which pulp will settle or density at which you want to discharge pulp from thickener. R = Settling rate in feet per hour.
What is the purpose of a thickener?
A thickening agent or thickener is a substance which can increase the viscosity of a liquid without substantially changing its other properties. Edible thickeners are commonly used to thicken sauces, soups, and puddings without altering their taste; thickeners are also used in paints, inks, explosives, and cosmetics.
What is grade in mineral processing?
Grade: The percentage of a metal in a product. Grain: A discrete chunk of pure mineral. Gravity methods: In mineral processing, refers to a separation process whereby gravity is utilized to effect separation between particles of greatly different densities. Grinding: Size reduction primarily by attrition.
What is clarifier in water treatment?
Clarifiers are settling tanks built with mechanical means for continuous removal of solids being deposited by sedimentation. A clarifier is generally used to remove solid particulates or suspended solids from liquid for clarification and (or) thickening.
How does a Bayesian classifier work?
Naive Bayes is a kind of classifier which uses the Bayes Theorem. It predicts membership probabilities for each class such as the probability that given record or data point belongs to a particular class. The class with the highest probability is considered as the most likely class.
How does a sludge thickener work?
Thickening of sludge increases its solids content and reduces the volume of free water thereby minimizing the unit load on downstream processes such as digestion and dewatering. The most commonly used thickening processes include gravity thickening, dissolved air flotation, and rotary drum thickening.
What is thickener underflow?
The diaphragm Thickener Underflow Pump is essentially one for low lifts and is particularly adapted to handle metallurgical pulps economically and with minimum attention. When the underflow from the thickener is too thin, a simple regulation of the pump will decrease the rate of discharge until its density is correct.
What does a secondary clarifier do?
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.
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.
Why do we use classifiers?
A classifier utilizes some training data to understand how given input variables relate to the class. When the classifier is trained accurately, it can be used to detect an unknown email. Classification belongs to the category of supervised learning where the targets also provided with the input data.
What does an air classifier separate?
Air classifiers separate particles using an air flow and the relationship between the force of inertia and/or gravity and the drag. The machines are used in the recycling industry.
