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The modernization continues with the aim of completely eliminating hydrogen sulfide emissions.

Sergei Sobyanin inspected the Kuryanovsk treatment facilities, where reconstruction work will be completed in the near future.

“Here, at the Kuryanovskiy wastewater treatment plant, all major work will be completed by the end of the year. And next year will be devoted to the commissioning of the equipment, so that everything is already working as usual, ”he said.

The Kuryanovsk wastewater treatment plant is located in the south-east of Moscow in the bend of the Moscow River, it is the largest enterprise of its kind in Europe. They have three blocks – the old block built in 1950-1956 and two Novo-Kuryanovsk blocks built in 1971 and 1978.

Industrial and domestic wastewater is supplied to the Kuryanovsk treatment plant from the North-West, West, South-West, South, South-East, North and Central districts and from the new territories of Moscow, as well as from settlements in the Moscow region. The actual average daily inflow of wastewater in recent years is 1.5 million cubic meters per day.

At the Kuryanovskiy wastewater treatment plant, a classical treatment scheme is used, which includes mechanical and biological treatment, during which wastewater successively passes through mechanical grates, sand traps, primary and secondary sedimentation tanks and aeration tanks. The purified water is disinfected by ultraviolet irradiation and discharged into the Moskva River.

The sludge formed during the purification process undergoes several processing stages, including fermentation and mechanical dewatering. The dewatered sludge is processed into artificial biosoil and used for the reclamation of quarries and landfills for solid waste.

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According to the Mayor of Moscow, the reconstruction of the Kuryanovskiy wastewater treatment plant has been going on for about 10 years. During this time, a huge work has been done, most of the structures were replaced with modern ones.

“The treatment facilities, which have been in service for more than half a century, are gradually turning into modern, new ones, which eliminate any pungent odors, hydrogen sulfide emissions, reduce the concentration of harmful substances, improve the water that is discharged into the Moskva River after passing through the treatment facilities. All this is not just some kind of repair, it is a radical reconstruction that will improve the situation with cleaning both at the Lyubertsy treatment facilities and at the Kuryanovskie ones, ”Sergei Sobyanin emphasized.

During the modernization, the following projects were implemented:

– in 2009, a biogas-fueled thermal power plant was put into operation, providing 50 percent of the needs of the Kuryanovskiy wastewater treatment plant in electricity;

– in 2011, a snow-melting station was built on the territory of the sewage treatment plant;

– since 2011, the reconstruction of the Kuryanovsk treatment facilities directly has been carried out;

– in 2012, an ultraviolet wastewater disinfection unit was put into operation, which provides water purification from bacteria and viruses that are dangerous to humans and the environment. The introduced technology is environmentally friendly and safe;

– Currently, the reconstruction of the first (NKOS-1) and second (NKOS-2) blocks of treatment facilities is underway.

During the modernization of NKOS-1 with a capacity of 600 thousand cubic meters of wastewater per day, the concrete structures of aeration tanks, channels and sedimentation tanks were restored, modern technological equipment was installed: sludge scrapers, sludge pumps, aeration systems, submersible pumps, mixers and turbo blowers;

In the course of work on the reconstruction of NKOS-2, the structures of eight aeration tanks, 12 sedimentation tanks, inlet and outlet channels and pumping stations were restored. All structures were equipped with modern energy efficient equipment and automation systems. The capacity of the unit after reconstruction is also 600 thousand cubic meters of wastewater per day.

“We have changed the approach to controlling effluent at wastewater treatment plants. If earlier we did it once a month, now – up to eight times a month. We look at the main indicators – what kind of water enters the treatment plant and gradually control its treatment – from mechanical and biological treatment and further to wastewater that flows into the river, ”said Elena Andreeva, head of the Federal Service for Supervision of Consumer Rights Protection and human well-being in the city of Moscow.

In addition, the main machine building was reconstructed – the most important link of the Kuryanovsk treatment facilities, where turbo-blowing units are located, which provide air supply to the aeration tanks.

Outdated equipment from 1971–1978 was replaced with modern equipment. Instead of 16 turbo-blowing units (14 working and two standby) with a capacity of 45 thousand cubic meters per hour each, 10 units (eight working and two standby) were installed with a capacity of 58 thousand cubic meters per hour each. They are considered to be among the most efficient in the world.

By the end of 2021, it is planned to reconstruct (build) a block of the main mechanical treatment facilities, which will increase the reliability and efficiency of the grids, sand traps and sludge treatment workshops, as well as build two groups of secondary clarifiers of the Novokuryanovsk treatment facilities in place of the primary ones in order to improve the quality of wastewater treatment for biogenic elements (nitrogen and phosphorus).

Reconstruction of the first and second blocks of the Novokuryanovsk treatment facilities will allow:

– to improve the quality of water purification (in particular, the concentration of ammonia nitrogen decreased by 7-10 times – from 10-15 milligrams per liter to 1.5 milligrams per liter);

– to optimize the number of personnel of the Kuryanovsk treatment facilities by installing modern equipment and automation;

– to improve the energy efficiency of the station;

– to update the main structures of treatment facilities, thereby ensuring their reliable operation over the next decades.

Director of JSC “Mosvodokanal” Alexander Ponomarenko noted that commissioning works at the Kuryanovsk treatment facilities are scheduled for the first – second quarters of 2022.

“Now the equipment is being installed at the last stage of reconstruction. This is a sand trap building and a metal grate building. After that, the maximum productivity will be achieved, ”said Alexander Ponomarenko.

Elimination of unpleasant odors

The most important task of the reconstruction of the Kuryanovsk treatment facilities was the elimination of unpleasant odors associated with their work. For this, a complex technological solution was used – the overlap of the main sources of odor: primary wastewater sedimentation tanks, supply channels, receiving chambers, sand traps and sludge compactors. In total, 78.2 thousand square meters of open surfaces were covered, including 34 primary sedimentation tanks with a diameter of 33, 40 and 54 meters. For the first time in domestic and foreign practice, an original development of Russian engineers – flat floating ceilings (in fact, these are floating covers that rise and fall depending on the level of wastewater in the sedimentation tanks) – were introduced in the sedimentation tanks of the Kuryanovsk treatment facilities. Unlike traditional dome-type ceilings, they are more compact and more economical in operation. Installation of floating floors does not require the construction of expensive supports and foundations.

The floating ceiling consists of three rings – central, middle and peripheral. The central and peripheral rings are fixedly fixed on the support-tower and the peripheral part of the sump. The middle ring is mounted on the water mirror and connected to the sludge scraper truss, which allows the ceiling to move with the truss relative to the central and peripheral rings. Each ring is made as an assembly, in the form of sections. Sections of the middle overlap ring are made in the form of sealed chambers to provide the necessary buoyancy. The bottom surface of the ceiling is smooth, without voids, constantly in contact with water, which excludes the accumulation of floating substances under it. The rings are overlapped with respect to each other. The gap between the movable and fixed rings is closed with a seal to prevent the evaporation of waste water and odors. Such a design of the overlap eliminates the contact of the water mirror with air, which means the release of vapors and odors.

In addition, as part of measures to eliminate unpleasant odors, the mechanical dehydration workshops were modernized – 16 compactors of fermented sludge with a total area of ​​14 thousand square meters were taken out of operation and mothballed, 36 gas-cleaning complexes for cleaning ventilation emissions were installed and two automated air monitoring stations were opened. Thus, all the main sources of unpleasant odors of the Kuryanovsk treatment plants are equipped with special devices to prevent their spread.

“We used to have up to 300-400 complaints a year – this is 2015-2016. Further, their number dropped sharply. But even during the pandemic, when people stayed at home, there were dozens of complaints. And in 2021 there is not a single complaint, that is, we see the effect of reconstruction, ”added Elena Andreeva.

As a result of the reconstruction of the Kuryanovsk treatment facilities, emissions of hydrogen sulfide will completely stop, which will improve the quality of life for about two million residents of the southern and southeastern districts of Moscow, who, depending on the direction of the wind, periodically find themselves in the zone of spread of unpleasant odors.

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Complex improvement of Maryinsky ponds

During a visit to the Maryino district, Sergei Sobyanin instructed to carry out a comprehensive improvement of the regulator ponds located in the area.

A cascade of 14 artificial regulator ponds with a total area of ​​more than 30 hectares, located along Novocherkassky, Maryinsky and Perervinsky boulevards, is the hallmark of the district and a popular recreation place for residents.

Maryinsky ponds are also part of a centralized drainage system that regulates surface runoff and groundwater levels. Ponds protect the area from flooding during heavy rains and floods, taking away excess water.

According to local fishermen, in the ponds on Novocherkassky Boulevard there are not only crucians and rotans, but also roach and perch. Fish enter the ponds through pipes during periods of high water levels in the Moscow River.

The eastern pond on Maryinsky Boulevard has concreted banks. Far from the water there are grassy slopes with trees, asphalt areas, stone stairs.

The most well-groomed, according to the residents of the region, is the pond on Maryinsky Boulevard, located between the Church of the Icon of the Mother of God “Satisfy my sorrows” and Lugovoy passage. This reservoir is decorated with a four-arched pedestrian bridge.

Maryinsky ponds have not been improved since the development of the area. Initiative groups of local residents came forward with a proposal to carry out complex work. At their suggestion, the city authorities developed a preliminary concept, which was supported by more than five thousand people. It was based on the idea of ​​creating five islands:

– summer office – with pavilions for coworking, reading, book-sharing;

– an island of culture – with dance floors, summer cinemas, venues for city events and fairs;

– children’s island – with playgrounds and a quiet area for strollers;

– beach island – for summer holidays with a beach, boat rental and picnic areas;

– an island of sports – with sports fields, tennis tables and yoga floors.

Residents of the district can view detailed information about the project and offer their ideas that will be taken into account in the improvement. dedicated website… The project is planned to be implemented in 2022–2023.

Ecology of Moscow: air and soil

Solving environmental problems is one of the priorities of the Moscow Government. Over the past 10 years, a set of measures has been implemented in the capital, which has significantly improved the environmental situation in the city.

Thus, the air quality has become higher, mainly due to the modernization of the vehicle fleet and industrial production. Compared to 2010, the concentration of the main pollutants in the atmosphere decreased by 1.3-2.3 times (including nitrogen dioxide – 1.3 times, fine suspended particles – 1.4 times, sulfur dioxide – 1. 7 times, nitric oxide – 2.2 times, carbon monoxide – 2.3 times). Near highways, a number of indicators have decreased by two or three times.

The modernization has also influenced the improvement of soil quality. According to various indicators, the content of pollutants, including heavy metals, decreased by 1.5-6.8 times (zinc – 1.5 times, nickel – 6.8 times) The average concentration of oil products in the soil (the main indicator of the impact of transport ) decreased 2.3 times. In 2020, the minimum level of soil pollution with oil products was recorded for the entire observation period (since 2005).

The city is working on the modernization of large industrial facilities and the closure of non-environmentally friendly enterprises. So, over the past 10 years, the Moscow Government (or with its support) has carried out or continues to modernize:

– Moscow Oil Refinery (reduction of emissions of pollutants into the atmosphere by 2.2 times, hydrogen sulfide and other unpleasant smelling substances by 96 percent, the discharge of pollutants into the Moscow River decreased by 100 times);

– Kuryanovsk and Lyubertsy treatment facilities (emissions of hydrogen sulfide and other unpleasant smelling substances have been reduced, the quality of water discharged into the Moscow River has improved);

– CHPP of PJSC “Mosenergo” (reduction of emissions by 11 percent).

Several non-environmentally friendly enterprises have also been closed, including the Ecolog medical waste processing plant, a cement elevator in Pechatniki and small boiler houses.

Green areas and reservoirs

In the capital, the technologies of sanitary maintenance of the city have been improved. Thus, vacuum sweepers were introduced, and the improvement and greening of urban areas made it possible to reduce the amount of dust. As a result, the content of fine suspended particles in the air in the residential areas of Moscow has significantly decreased.

Compared to 1990, greenhouse gas emissions have decreased by more than 20 percent. Now their specific indicator per capita in Moscow is 19 percent less than, for example, in San Francisco, which occupies a leading position in the ranking of cities in the world “Green Index” (Moscow – 4.58 tons of carbon dioxide (CO2) equivalent per person , San Francisco – 5.76 tons, Vancouver – 3.7 tons, Singapore – 8.59 tons, Buenos Aires – 5.11 tons).

Moscow is the only Russian city that is a member of the C40 group (“Big cities – a group of leaders in climate preservation”). It includes the 80 largest cities in the world with a population of 600 million. The main goals of the C40 group, created in 2005, are to raise awareness of climate change and revitalize cities to reduce carbon dioxide emissions.

The pollution of the Moskva River with oil products and metals has halved. The content of substances typical for domestic sewage is 40 percent.

The condition of the rivers in the Troitsky and Novomoskovsky administrative areas has improved. For example, the content of ammonium nitrogen, a substance typical of household sewage discharges, in the Pakhra River decreased by 50 percent compared to 2014.

More than 17 thousand hectares or about 50 percent of the city’s area is occupied by natural areas. Moscow has 142 specially protected natural areas with a total area of ​​more than 19.6 thousand hectares, 26 of them were created in 2020. There are plans for this year to create eight more protected natural areas.

According to research by the consulting company PricewaterhouseCoopers, Moscow ranks first in terms of the area of ​​green natural and recreational facilities per capita among 12 cities, such as New York, Beijing, London, Berlin, Singapore and others.

About 90 percent of the capital’s population has access to green areas within walking distance. In addition, over the past 10 years, about 10 million trees and shrubs have been planted in Moscow.

EDITOR’S NOTE: This article is a translation. Apologies should the grammar and or sentence structure not be perfect.

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