Surgil ESIA Report - Volume III - EKN

“O’ZLITINEFTGAZ”
open joint-stock company
FS «Complex development of Surgil field
with extracting of valuable components»
• contaminated with oils;
• sanitary;
• mineralized.
For the purpose of waste waters treatment it is necessary to arrange treatment facilities. In case it
is necessary to treat waste waters locally it is performed.
Also it became clear that it is necessary to arrange areas for temporary storage of solid wastes.
Generally this waste includes used catalysts, molecular sieves, ceramic spheres, etc. There is the
proposal being considered regarding construction of a landfill where waste will be stored and further
managed or disposed.
Ecological analysis for the technical decisions shows the following:
• during construction of UGCC they will be applying up-to-the-minute gas treatment
technologies, hi-tech equipment and materials of the complete delivery;
• the ratio of the valuable components recovery from natural gas from Surgil field will be
extremely high; those valuable components are ethane, propane, butane and light
condensate; high-quality natural gas after drying procedure will be pumped into the gasmain
pipeline;
• the ratio of oils recovery from the oily wastewaters (with the help of separators of special
construction) will be high;
• UGCC will be equipped with the fuel system utilizing all combustible both gaseous and
liquid wastes produced by the process units as the fuel in the cracking furnaces, steam
generators, etc.; incoming gas supply will be minimum;
• UGCC will have flare system similar to one in Shurtan GCC. The flare system will be
continuously in ready mode and work during start-up while entering production mode or
short-run when safety devices of the process equipment have actuated;
• the problem of supply of PE product for the Republic of Uzbekistan and other countries
based on advanced technologies carrying minimum environmental risks will be solved.
3 WASTE WATERS SPECIFICATION AND DISPOSAL
Water supply for UGCC will be carried out via 630x7mm water conduit of 75km length. For the
purpose of uninterruptable water supply in situation with the single water line it is necessary to provide
for the pondage during water conduit breakdowns elimination and an additional pondage for fire-fighting
system.
According to «SAMSUNG» company the amount of circulated water will total 38,375m 3 /h.
During the normal operation of UGCC water consumption will total:
• service/potable water requirements – 11m 3 /h;
• process water requirements – 917.9m 3 /h including cooling water system – 772m 3 /h, HP,
MP, LP steam system – 145.9m 3 /h
• fire-fighting system (basins filling) – 360m 3 /h.
Major water losses will be in steam generating and cooling systems.
Book 5. Declaration of environmental impact concerning UGCC construction
18