Effluent Treatment Plant (ETP) & Its Operation
Techno Color Corporation is producing S.O.Dyes. Most of the dyes are spray-dried with our recently commissioned Spray Dried Plant. The waste water generated from the production process is mainly the washings of the Spray Dried Plant and the reactors, which gets collected in 25 M3 capacities RCC underground Collection Tank from this tank, the waste water is pumped to 3 X 5 M3 capacities R.C.C stirred tanks, three such tanks are available in series. The waste water is checked for pH. (There are 2 X 10 M3 capacity HDPE underground tanks in reserve. In most cases, it is neutral and if not, it is corrected either with HCl or Caustic Lye depending on the pH value to get the resultant pH within 6.5 – 8.5. It is then treated with diluted Ferrous Sulphate solution and the pH is compensated to form small flocks. It is then treated with Polyelectrolyte solution to precipitate the coagulated mass. The resultant coagulated mass is then filtered in Nutsche filter. The clear liquid is allowed to flow either in underground 10 M3 HDPE tank or underground 25 M3 R.C.C tank. The contents are checked for COD. The treated waste water is aerated further by diffuse aeration system, if required.
The treated waste water, Okay in all respect, is pumped to G.I.D.C. Drainage system through clarifier containing Activated Carbon Bed.
Details of Effluent Treatment Plant:
1) Collection Tank
| No of Unit | 1 |
| Length | 7550 mm |
| Breadth | 1200 mm |
| Depth | 1750 mm |
| Total Volume | 25,000 Ltrs |
| Flow From | Process Plant |
| Flow To | Equalization-cum-Treatment Tank by Pump |
| Material of Construction | R.C.C |
2 (A). Newly Installed Equalization-Cum-Treatment/Neutralization Tank
| No. of Unit | 3 × 5000 Ltrs Capacity of each Tank |
| Diameter | 1750 mm |
| Length | 2500 mm |
| Flow From | Underground Effluent Collection Tank by Pump |
| Flow To | Filter N-utsch by Gravity |
| Material of Construction | R.C.C |
2 (B). Equalization-Cum-Treatment/Neutralization Tank
| No of Unit | 2 |
| Length | 2000 mm |
| Height | 3450 mm |
| Total Volume | 1000 Ltrs of Each Tank |
| Flow From | Process plant or Underground effluent collection tank by pump |
| Flow to | Filter Nutsche by Gravity |
3) Filter Nutsche
| No of Unit | 1 (+1 as standby) |
| Diameter | 2200 mm |
| Height | 660 mm |
| Total Surface Area | 380 cm² |
| Total Volume | 2500 Ltrs |
| Flow From | Equalization tank by Pump |
| Flow To | Area Tank by Gravity |
| Material of Construction | Mild Steel Rubber Lined |
4) Sludge Storage Tank
| No of Unit | 1 |
| Length | 1270 mm |
| Breadth | 1270 mm |
| Depth | 700 mm |
| Total Volume | 1,000 Ltrs |
| Material of Construction | Mild Steel |
5) Aeration Tank
| No of Unit | 1 |
| Length | 7550 mm |
| Breadth | 1200 mm |
| Depth | 1750 mm |
| Total Volume | 25,000 Ltrs |
6) Settling Tank
| No of Unit | 1 |
| Total Volume | 2,000 Ltrs |
7) Activated Carbon Column
| No of Unit | 1 |
| Diameter | 275 mm |
| Length | 1800 mm |
| Packing | Packed with Activated Carbon |
| Total Volume | 25,000 Ltrs |
