Project documentation on the construction of new biological wastewater treatment facilities at the Gazprom Neft Moscow Refinery has been approved by Russian state building standards and quality control agency Glavgosekspertiza. These new facilities mark the second stage in the development of a comprehensive treatment complex at the Moscow Refinery — the first stage having involved the replacement of older open-type treatment facilities, brought into production in 2012, which have reduced emissions by more than 90 percent, as well as resulting in a six-fold reduction in emissions of oil content into effluent.
The new biological treatment facilities at the Moscow Refinery have a total capacity of 1,400 cubic metres per hour across two zones, the first covering an area of 6,400 square metres and the second 18,000.
The new biological wastewater treatment plants will be built on the former buffer zone, decommissioned in 2012. Construction of a new production facility is expected to begin in the second half of 2015. The new biological treatment facilities are expected to be brought into operation in 2017.
The new biological treatment facilities at the Moscow Refinery will use a technology unique to Russia involving a final cleaning of wastewater, allowing the removal of 98 percent of pollutants. The processing chain at the wastewater treatment facilities will include membrane bioreactor units, two-stage flotation, carbon filters, dehydration of activated sludge and oil sludge, and reverse osmosis. The purification of almost 100 percent of industrial effluents from the refinery will now become possible through the use of activated sludge in combination with mechanical filtration through a membrane bioreactor. Activated sludge contains various microorganisms which, together, act as a culture for the purification of various refining side-products, including nitrogen and other potentially harmful substances — the abundance of such microorganisms in the activated sludge resulting in the assimilation of such contaminants. Biological catalysts within the activated sludge cause biochemical reactions leading to the conversion of various particles within it into non-hazardous materials.
Through using this multi-stage biological wastewater treatment system, water consumption at the refinery will be reduced
JSC Gazpromneft Moscow Refinery, a subsidiary of JSC Gazprom Neft, has a total annual production capacity of 12.15 million tonnes per year, producing automotive fuels (gasoline), diesel, marine and aviation fuels, heating oil, high-octane additives for automotive fuels, bitumens, and gases for various applications.
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