Effluent Treatment System

Product Details:

1. Screen Chamber:-

• This chamber removes relatively large solid to avoid abrasion of mechanical equipment and clogging of hydraulic system.

2. Collection Tank:-

• The collection tank collects the effluent water from the screening chamber, stores and then pumps it to the equalization tank.

3. Equalization Tank:-

• The effluents do not have similar concentration at all the time; the pH will vary time to time.
• Effluents are stored for up to 8 to 12 hours in an equalization tank resulting in the homogenous mixing of effluents and helping in neutralization.
• Continuous mixing also eliminates settling of solids within the equalization tank.
• Reduces SS, TSS.

4. Flash mixer:- Coagulants are added to the effluents:

• Lime:(800-1000 ppm) To correct the pH upto8-9
• Alum: (200-300 ppm) To remove colour
• Poly electrolyte : ( 0.2 ppm) to settle the suspended matters and reduce SS, TSS.

The addition of the above chemicals by efficient rapid mixing facilitates homogeneous combination of flocculates to produce micro flocs.

5. Clarriflocculator:-

• In the clarriflocculator the water is circulated continuously by a stirrer.
• Flocculation provides slow mixing that leads to the formation of macro flocs, which then settles in the clarifier zone.
• Overflowing water goes out to the aeration tank.
• The solid particles settle down, and are collected separately; this reduces SS, TSS.
• The settled solids i.e. primary sludge is pumped into sludge drying beds.

6. Aeration Tank:-

• The effluent after clarification flows to an aeration tank for aerobic treatment.
• This tank is equipped with air blowers or diffusers using which air is passed through the tank.
• This air is required to maintain the desired dissolved oxygen (DO) level required for bacteria to grow and remove BOD and COD by breaking down the matter.
• BOD and COD values of effluent are reduced up to 90%.

7. Secondary Clarifier:-

• The overflow from aeration tank is led into the secondary clarifier where solid liquid separation takes place.
• The settled solids in secondary clarifier are called biological sludge, a part of which is recycled back into the aeration tank to maintain the desired MLSS level and remaining sludge is conveyed to sludge collection tank for further treatment.
• The outlet water quality is checked if it’s within the accepted.
• The treated water is disposed through pipelines.

8. Sludge Thickener:-

• The inlet sludge consists of 60% water + 40% solids.
• The effluent is passed through a centrifuge.
• Due to centrifugal action, the solids and liquids are separated.
• The sludge thickener reduces the water content in the effluent to 40% water + 60% solids.
• The effluent is then reprocessed and the sludge is collected at the bottom.

9. Drying Beds:-