Ujjwal Engineers And Environmental Services

Effluent Treatment Plant (ETP) :

Effluent Treatment Plant or ETP is one type of waste water treatment method which is particularly designed to purify industrial waste water for its reuse and its aim is to release safe water to environment from the harmful effect caused by the effluent.

Primary Treatment: Wastewaters from manufacturing process, washings & cooling tower blowdown etc. will be collected in the equalization tank and air stripped. This effluent will then be pumped to the Flash Mixer where it will be dosed with PAC for coagulation. Flash Mixer will be followed by a Flocculation or where poly will be dosed for bigger flock formation. This effluent will overflow into the settling tank where the solids will settle down and will be removed. Primarily treated effluent further fed to secondary treatment via intermediate sump.

Secondary Treatment: Primary treated effluent along with domestic wastewater will enter the bioreactor. In the bio reactor, dissolved organic material is degraded by the micro–organisms present in the bio reactor. Oxygen required for the oxidation of organic matter will be provided by means of diffuser for aeration system which will mix the contents of the bioreactor also. The mixed liquor will overflow into Secondary Settling Tank (SST). In the secondary settling tank, solid-liquid separation takes place and solids i.e. biomass will settle at the bottom of the tank. Settled biomass will be recycled to the bio reactor for maintaining the MLVSS concentrations by using proposed sludge recycle pumps and excess biomass will be wasted periodically to the sludge sump. The clear overflow from the Secondary Settling Tank will be collected in the intermediate tank.

Tertiary Treatment: The clear effluent from the intermediate sump will be pumped by tertiary Feed pumps through activated carbon filters (ACF) and Pressure Sand Filter (PSF). The final treated effluent will be collected in the final collection tank.