What is the function of trickling filter?

Trickling filters (TFs) are used to remove organic matter from wastewater. The TF is an aerobic treatment system that utilizes microorganisms attached to a medium to remove organic matter from wastewater.

Keeping this in consideration, what is meant by trickling filter?

Definition of trickling filter. : an artificial bed of broken rock or other coarse material through which sewage or industrial wastes trickle after being sprayed on intermittently so that organic matter present is oxidized and removed by biological growths formed on the surfaces of the rock.

Also Know, what is meant by high rate trickling filter? High rate or high capacity trickling filters. 1. Low Rate Filters. They are also known as standard rate or conventional rate filters. The settled sewage is applied to the filter bed and after trickling through it, passes through the final sedimentation tank for removal of most of the stabilized solids.

Correspondingly, what is the purpose of recirculation in a trickling filter plant?

The process of returning a portion of sewage effluent to flow through the filter is known as recirculation. The purpose of recirculation includes the following aspects: The efficiency of treatment is increased by bringing the effluent in contact with the active biological matter present in the filter once more.

What is BOD water?

Biochemical oxygen demand (BOD) is the amount of dissolved oxygen needed (i.e. demanded) by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.

Which one of the following is used in trickling filter?

Explanation: Trickling may have a variety of types of filter media used to support the biofilm. Coke, pumice, plastic matrix material, open-cell polyurethane foam, clinker, gravel, sand and geotextiles are the most common type of media used.

What is high rate trickling filter?

It is suitable for treatment of low to medium strength domestic wastewaters. The high rate trickling filter, single stage or two stage are recommended for medium to relatively high strength domestic and industrial wastewater. The BOD removal efficiency is around 75 to 90% but the effluent is only partially nitrified.

What is BOD and COD?

COD or Chemical Oxygen Demand is the total measurement of all chemicals (organics & in-organics) in the water / waste water; BOD is a measure of, the amount of oxygen that require for the bacteria to degrade the organic components present in water / waste water.

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. In some applications, more advanced treatment is required, known as quaternary water treatment.

How does a trickle filter work?

How Does a Trickle Filter Work? Trickle filters allow water to freely flow out of the tank by means of an overflow. As the name implies, an overflow is a mechanism that allows water to just flow out of the fish tank when it reaches a certain level. The drain pipe channels the water to the top of the tower.

What is oxidation ditch?

An oxidation ditch is a modified activated sludge biological treatment process that utilizes long solids retention times (SRTs) to remove biodegradable organics. Oxidation ditches are typically complete mix systems, but they can be modified to approach plug flow conditions.

What is STP plant?

Sewage Treatment Plant (STP) Sewage treatment is the process of removing contaminants from wastewater, primarily from household sewage. It includes physical, chemical, and biological processes to remove these contaminants and produce environmentally safe treated wastewater (or treated effluent).

What is activated sludge in wastewater treatment?

The activated sludge process is a type of wastewater treatment process for treating sewage or industrial wastewaters using aeration and a biological floc composed of bacteria and protozoa.

What is a RBC wastewater treatment plant?

A rotating biological contactor or RBC is a biological treatment process used in the treatment of wastewater following primary treatment. The primary treatment process means protection by removal of grit and sand and coarse material through a screening process, followed by a removal process of sediment by settling.

What is trickling filter with diagram?

A trickling filter is a type of wastewater treatment system. It consists of a fixed bed of rocks, coke, gravel, slag, polyurethane foam, sphagnum peat moss, ceramic, or plastic media over which sewage or other wastewater flows downward and causes a layer of microbial slime (biofilm) to grow, covering the bed of media.

What is activated sludge method?

Activated-sludge method, sewage-treatment process in which sludge, the accumulated, bacteria-rich deposits of settling tanks and basins, is seeded into incoming waste water and the mixture agitated for several hours in the presence of an ample air supply.

What is sewage oxidation pond?

Oxidation ponds, also called lagoons or stabilization ponds, are large, shallow ponds designed to treat wastewater through the interaction of sunlight, bacteria, and algae. During the process of photosynthesis, the algae release oxygen needed by aerobic bacteria.