| Author | Srivastava, Vijay Kumar |
| Call Number | AIT Thesis no. EV-96-39 |
| Subject(s) | Pollution--India--Bokaro
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of
Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Bokaro Steel Plant (BSL), an Integrated Iron & Steel Industry at Bokaro and conceived
in early 60s, during short span of about two decades, has come out to be christened the largest
steel complex of its kind in Asia. Though subsequently modernized and expanded to its four
million ton capacity most of the Pollution Control Systems (75-80%) at BSL are designed and
installed in early 70s with specific raw materials and pollution control requirements. However,
since then besides aging of the plant, process technology and the pollution control devices
becoming obsolete as per technological development, the quality of raw material has
deteriorated with respect to percentage fines and ash content as high as 70% as compared to
DPR norms of 25-30%, which led to a situation where the process emissions could not match
the increasingly stringent government legislation and environmental status. The study taken
up investigated the extent of emissions from various process units and the prevailing air
quality in and around the plant with the associated steel city of Bokaro having a population of
more then 350 thousand and a massive work force of more than 50 thousand attached'to the
plant activities.
It is evident from the study that S02 and NOx concentrations are well within the
Indian norms, however SPM are the major concern at BSL in relation to its air quality. The
ambient air quality at Steel City and inside the Plant are within safe·r limits with max. SPM
value of 337 µg/N m3 at Industrial Area site and minimum SPM value of 125 µg/N m3 near
CISF (SOP), well below the norms of 500 µg/N m
3
. The maximum of 9 µg/N m3 and
minimum of 7 µg/N m3 of S02 cone. and a maximum of 34 µg/N m3 ~d a minimum of 28
µg/N m3 ofNOx cone. were observed as compared to CPCB norm of 120 µg/N m3
. While, as
per stack emissions the Captive Power Plant (TPP & CPP) are the worst hit with average SPM
value (around 1600 mg/N m3
) far exceeding the set norm of 150 mg/N m3
. The Sinter Plant
pollution control equipment (average SPM value - 234 mg/N m3
: norms of 150 mg/N m\
Lime & Dolomite Plant control (average SPM value - 458 mg/N m3
: norms 150 mg/N m3
) and
the emissions from Coke Oven (average SPM value - 103 mg/N m3
: norm 50 mg/N m3), are
of considerable concern at BSL.
With the study of various process technology in use, major causes and sources of air
emissions along with the study of various air pollution control measures taken up at BSL,
several Shopwise Air Pollution Management Strategies have been worked out to mitigate air
emissions through both long and short term recommendations which include Operational
(repairs and maintenance), Revamping as well as Replacement of the Air Pollution control
Devices. With, all these measures it will be possible to curb down the Air Emissions to the
present as well as further more stringent norms towards Air Pollution. |
| Year | 1996 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Reutergardh, Lars Baetz |
| Examination Committee(s) | Kamei, Tasuku ;Remigio, Amador |
| Scholarship Donor(s) | Government of Sweden through,
Swedish International Development Cooperation Agency (Sida) |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1996 |