Waste Water Treatment Plants (WWTPs)

Aeration Equipment

MORF INDIA supplies different types of aerators like surface aerators (fixed and floating) and various types of diffused aerators.

The surface aerator is a vertical shaft aerator that mechanically transfers oxygen in to the aeration tank. Diffused aerators inject air into the waste water at a calibrated pressure from the bottom of the tank. Aerators help water absorb the desired quantity of oxygen and in maintaining the level of MLSS in the waste water. All these aerators are available in different sizes and designs. The intensity of aeration can be measured by monitoring the level of dissolved oxygen. Twin lobe blowers of required capacity supply compressed air to the diffusers. The blowers can be housed in sound proof enclosures to reduce noise thus facilitating the location of units close to the residential units.

Mixers and agitators are also used to mix/agitate chemicals, polymers, coagulants and flocculation agents in water.


Bar Screen

MORF fabricates/sources a variety of screens with different sizes and types. Screens remove large particles contained in the waste water. Standard plants come with coarse and fine screens which are manually cleaned. However, in larger plants these screens can be automated to a good extent. The amount and type of solids trapped depends on the size of the screen gaps. The screens are designed based on specific client requirements and site conditions.


Filter Press

Filter Press is a highly efficient device designed for solid / liquid separation processes. This device works on the principle of pressure filters. A filter press consists of a series of filter plates and frames which are arranged alternately. The filter medium is provided in between the plates. A feed pump is used to force the liquid (moist sludge) through feed nozzles of the filter press to the chamber formed between the plates and the medium leaving the solids trapped inside and the liquid drained out.

The sludge is compressed between a fixed head on one end and a movable bulk head on the other end. A manually or hydraulically operated closer is required to operate the filter press. Filter presses are assembled with two types of plates (recessed plate and membrane plate) and available in various sizes.

Cake which is built in the hollow space between the plates will fall out once the pack is opened. Filter press is the most efficient and most employed mechanism in sludge de-moisturizing applications. Filter press is a very efficient equipment in waste water sludge (biological and chemical) separation. MORF INDIA offers manually and hydraulically operated filter presses.


Sludge Thickeners

Sludge thickener mechanism is basically an aerobic system which by means of natural bacteriological process concentrates sludge thus reducing the volume of sludge for easier transportation and usage. The sludge is supplied with air to provide oxygen to maintain and expedite concentration. The thickener mechanism has a shaft supported on top by bush and hung from central scrapper bridge cum walkway. Top of the shaft is connected to gearbox output by small gear. The shaft shall have rake arms on both the sides. The scrapper blades are fixed on scrapper bridge arm bottom. The blades scrape, push and demoisturize the sludge. The blades shall push the sludge to central sludge pit. The gear train with which the top of the shaft is connected shall consist of motor, gear and related drive assemblies.

The word "Sludge Thickening" is a broad term which means reducing the sludge volume by de-moisturizing sludge. De-moisturizing can be done in many ways. Water content in sludge can be reduced by mechanically compressing sludge in filter press, belt press etc. This can also be achieved by centrifuge mechanism and also by other mechanical devices. Sludge drying beds are also used to dry sludge.


Clarifiers

A clarifier is a funnel type tank with a round-shaped conical bottom. Waste water enters through a pipe located at the centre of the clarifier and is so designed to reduce the velocity of the incoming water and also ensures that incoming water is uniformly distributed in all directions to fully utilize tank capacity in order to have maximum possible settling time. Adequate time is built into the design to cause separation of settleable particles from water. These particles gradually travel down to the slope of the clarifier and become sludge. The water on top surface is without these particles and is much clearer. This clearer water is designed to over flow out.

The clarification process can be expedited through addition of flocculants and coagulants. This also results in higher efficiency and smaller footprints.

Oil skimmers or oil removal systems are used in a WWTP to remove excess oil and grease from the waste water. Different types of oil skimmers like tube type and belt type are available.

DAF (Dissolved Air Flotation) is also a very versatile and effective system to remove emulsified oil from the water. Rate of removal of oil and grease from the waste water is very high with DAF.


General Applications

Gardening and toilet flushing

Air-conditioning and cooling tower recirculation

Agriculture and landscape irrigation purposes

Replenishing ground water basins - Ground water recharge/harvesting

Discharge into stream, river, bay, ponds, lakes, wetlands

Other industrial processes