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TRICKLING FILTERS

TRICKLING FILTERS

DESCRIPTION OF TRICKLING FILTER Trickling Filter A trickling filter (TF), an attached growth system, consists of a fixed bed of highly permeable media on whose surface a mixed population of microorganisms is...
AERATED LAGOON

AERATED LAGOON

Principe of Aerated Lagoon An aerated lagoon is a suspended-growth process treatment unit. The aerated lagoon system consists of a large earthen lagoon or basin that is equipped with mechanical aerators to...
ACTIVATED SLUDGE PROCESS

ACTIVATED SLUDGE PROCESS

DESCRIPTION OF ACTIVATED SLUDGE PROCESS The activated sludge process (ASP) was developed in England in 1914 and was so named because it involved the production of an activated mass of microorganisms capable of...
WASTE STABILIZATION PONDS

WASTE STABILIZATION PONDS

HISTORY OF WASTE STABILIZATION PONDS Wastewater lagoons have been used as a process for wastewater treatment for centuries. In the 1920’s artificial ponds were designed and constructed to receive and...
CARROUSEL SYSTEM

CARROUSEL SYSTEM

The Carrousel system is based on the principle of oxidation ditch where primary settlement, the activated sludge process, secondary settlement and sludge mineralization can take place simultaneously. The...
Cage Rotor

Cage Rotor

One or more mechanical surface aerators with horizontal axis, generally known as cage rotors are attached to the side of the ditch. Cage rotors generally resemble a large circular brush. The rotor is mounted...
OXIDATION DITCH

OXIDATION DITCH

Description of Oxidation Ditch Oxidation ditch is an extended aeration activated sludge process. An oxidation ditch is a large holding tank in a continuous ditch with oval shape similar to that of a racetrack....
Sequential Batch Reactor (SBR)

Sequential Batch Reactor (SBR)

The Sequential Batch Reactor (SBR) is a variation of the ASP. As a fill and draw or batch process, all biological treatment phases occur in a single tank. This differs from the conventional flow through...
Advantages and disadvantage of aeration system

Advantages and disadvantage of aeration system

Advantages of extended aeration system: Plants are easy to operate, as the management of operation is for a maximum of two or three hours per day. Extended aeration processes are often better at handling...
Mechanical Aerator

Mechanical Aerator

surface aerator Type of Mechanical Aerators Mechanical aerators are of two general types; surface aerators and turbine aerators. Surface aerators consist of submerged or partially submerged impellers, which...
AERATION

AERATION

Aeration serves three important functions : Mixing the returned sludge with effluent from primary treatment, Keeping the activated sludge in suspension, and Supplying the oxygen to the biochemical...
ROTATING BIOLOGICAL CONTACTOR

ROTATING BIOLOGICAL CONTACTOR

The rotating biological contactor (RBC) has been used in Europe for many years to treat both municipal and industrial wastewaters. RBC’s produce a high quality effluent. RBC’s are fixed-film...
TYPES OF TRICKLING FILTERS

TYPES OF TRICKLING FILTERS

The Trickling filters are classified based on hydraulic or organic loading, as low rate trickling filter (LRTF), high rate trickling filter (HRTF) and Roughing Filter. 1 Low Rate Trickling Filter (LRTF) The...
ADVANTAGES AND DISADVANTAGES OF TRICKLING FILTER

ADVANTAGES AND DISADVANTAGES OF TRICKLING FILTER

Advantages Simple and reliable process that is suitable in areas where large tracts of land are not available for a WSP treatment system Effective in treating high concentrations of organic material...
BIOLOGICAL TREATMENT

BIOLOGICAL TREATMENT

Advantage and disadvantage of biological...
SECONDARY TREATMENT

SECONDARY TREATMENT

SOLIDS IN SEWAGE The solids present in the sewage are of two types viz., Organic solids, and Inorganic solids. Organic solids are the substances derived from living things like produces from plant and...
SEWAGE TREATMENT OPERATIONS AND PROCESSES

SEWAGE TREATMENT OPERATIONS AND PROCESSES

1 Physical Unit Operations In the physical unit operations physical forces are utilized in some units for the removal of solid contaminants. The physical unit operations are: Screening Mixing Flocculation ...
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