Table 5.22 : Hazardous Wastes Generated at West Bokaro

 

Quantity

  04-05 05-06
Oil soaked cotton, m3/year 270.1 197.4
Used oil, liters 295706 423865
Used Batteries, Numbers 451 602

Effluent Management (EN12)
Wastewater from process was treated with best available physio-chemical methods and recycled in the process. Wastewater from the coke plant was treated biologically where organic pollutants are oxidized and decomposed by microorganisms.

The absolute effluent quantities and pollution loads from the Steel Works are furnished in Table-5.23. The levels of total pollutant discharge in the wastewater streams have reduced considerably at various locations as shown in the Fig.5.27, 5.28 & 5.29.

Noamundi and Joda Iron Mines & Collieries at West Bokaro and Jharia do not discharge any overflow from the Slime/Tailing Dams. The quality of the treated effluent discharged from the Jharia Group of Collieries is presented in Table 5.24.

Table 5.23 : Pollutants & effluents from Steel Works

Parameter

03-04

04-05 05-06
Effluent Quantity (million m3) 9.04 11.10 11.20
TSS (tonnes) 656.78 721.30 726.20
Oil & Grease (tonnes) 20.10 21.13 23.98
Ammonia (tonnes) 71.26 94.94 103.98
Cyanide (tonnes) 0.83 1.05 1.20
Phenol (tonnes) 1.25 1.15 1.24