Waste Handling (EN11)
Most of the solid wastes generated from the Steel Works are recycled/reused. Wastes such as, sludges from BF gas cleaning plant and part of LD slag could not be recycled because of high alkali and high phosphorous content as, respectively. Solid Waste utilization statistics including hazardous wastes during the year 2005-2006 are presented in Table-5.19.

5.19 Waste Utilization

  04-05 05-06
    Tonnes % of generation Tonnes % of generation
B F Slag Cement making

1105487

92.48

 1351619 91.07
L D Slag Sinter making

888564

74.37

 700559 61.63
B F Sludge Domestic fuel

27982

85.05

 40064 87.05
L D Sludge Sinter making

80909

70.42

 146334 114.00
Mill Scale Sinter making

57801

100

 68822 110.29
Flue Dust Sinter & dom. Fuel

25260

32.75

 27979 27.55
Lime Fines Sinter making

100849

100

 112138 100
Dolo Dust Sinter making

1140

100

 24041 100
Ref. Waste Sale

13673

100

 10689 100
Tar Sludge Coke making

3626

100

 5360 100
Oil Sludge Coke making

1219

100

 2540 100
BOD Sludge Coke making 277

100

 - -
U/S Lime St. Sinter making

86627

100

 24513 100
Mill Sludge Sinter making

8440

100

 12631 100
Roll dust Sinter making

Nil

 Nil - -
TOTAL  

2401854

83.16

 2527289 80.2

Hazardous Wastes & Bio-Medical Wastes
The details of hazardous waste generation and utilization in Steel Works and bio-medical wastes for TMH Jamshedpur are furnished in Table 5.20. Waste quantities were not weighed and are reported based on average capacity of trucks/tankers/containers. The hazardous waste reported does not include all the parameters reported to the State Pollution Control Board, as some of the wastes, which are recycled in the processes, have not been established as hazardous. Tata Steel did a characterization of these wastes during the year 03-04 and only the following wastes have been found to be hazardous.

Table 5.20: Hazardous Waste Generation & Utilization
    Class/
Category

Units

Quantity

  
04-05 05-06
1 Tar Sludge

1.8

 t 3620 5405 Recycled to Coke Plant
2 BOD Sludge 1.9   277 - Recycled to Coke Plant
3 Cyanide Sludge (at Ring Plant) 11.1 t 19 19.2 Treated in BOD Plant
4 Zinc Dross 16.3 t 1553 1447 Sold to authorized agencies
5 Chrome Sludge 17.1 t 19.8 5.6 Protected landfill
6 Lube oil sludge/Coolant oil sludge 37.1 t 1853 2735 Recycled to Coke Plant/Power Plant
7 Lead acid batteries 41.3 nos. 382 749 Auctioned to registered recycler
8 Used lube oil/grease 44.1 KL 192 260 Recycled to Blast Furnace

Bio-Medical Wastes (Tata Main Hospital) Generation & Disposal per Month (Average Quantity)
1 Human anatomical wastes 1 kg 6583 5935 Incineration – 100%
2 Micro-biological/bio-technology waste
Waste sharps		 3 kg 445 169 Autoclaving – 100%
3 Solid Waste (Infection Waste) 4 kg 10112 5991 Incineration – 100%
4   - kg 4524 5388  

Hazardous wastes generated at the mines and collieries were auctioned to registered recyclers and oily waste/sludge is land filled in secured landfills. Table 5.21 and Table 5.22 indicate the hazardous waste generated at Mines and West Bokaro Colliery, respectively.

Table 5.21 : Hazardous Wastes Generated at Mines
   

Quantity
    04-05 05-06
Maint. And repair work Oil sludge/ Emulsion/ Soaked cotton (m3 ) 40.56 25.41
Lubricant Used oil, Nos. 215 352
Batteries Used battery, Nos. 121 177
  

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