No. 1 public confidence in solving’garbage acid’… Cement factory heavy metal contamination okay

Putting in waste plastic cement kiln
Use of 2 million tons per year as alternative fuel for kiln
Emerging as an alternative to increased waste disposal

Air pollution and chlorine dust treatment is homework
Cement grade system and profit sharing system requirements

– The massive 200,000 tons of trash has recently been removed.
This is thanks to Uiseong-gun’s execution of administrative agency with government support.

An official in Uiseong-gun said, “The garbage is divided into burning and non-burning, and the burning ones with high thermal efficiency were sent to the cement plant.”
The Ministry of Environment built a bridge in the middle, and about 70% of the trash that formed the mountain was moved to a cement factory in Gangwon-do.

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The site where the so-called’Uiseong Garbage Mountain’ was located. Most of the trash has recently been moved elsewhere. [경북 의성군]

– The cement plant, which received 75,000 won per ton for treatment costs, plans to put this garbage in the kiln and burn it.

Instead of bituminous coal, plastic, vinyl, and waste tires are used as fuel.

Chinese import ban and waste plastic piled up in corona

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Recycled products such as waste plastics collected at the Resource Recycling Center in Suwon-si, Gyeonggi-do in June of last year are piled up. News 1

– Recently, domestic cement factories are significantly increasing the amount of waste plastics, not only waste in Uiseong-gun, but also waste plastics generated across the country.

This is because exports of waste to China have been stopped since 2018, and plastic waste is pouring out as more parcels and food delivered from last year due to the novel coronavirus infection (Corona 19).

In contrast, existing waste incineration facilities are saturated, and it is difficult to install new facilities due to civil complaints.
In the case of facilities using solid waste fuel (SRF), the completed construction is not operational due to civil complaints.

According to the Korea Cement Association, the amount of various wastes used by each cement company as an auxiliary raw material and fuel increased from 6997,000 tons in 2017 to 7435,000 tons in 2018 and 8093,000 tons in 2019.
Considering only waste synthetic resin, it has been used from 900,000 tons in 2018 to more than 2 million tons per year.

The industry estimates that greenhouse gas emissions can also be reduced by replacing bituminous coal, which is a fossil fuel.

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Ssangyong Yanghoe Donghae Plant. yunhap news

– Ssangyong Cement, the number one in the industry, invested 100 billion won in factories in Yeongwol and Donghae, Gangwon-do, and is also showing interest in the cement industry, such as expanding the scale of waste synthetic resin utilization facilities from 150,000 to 700,000 tons per year.

In the past, waste was bought with money, but now it is possible to save fuel costs while receiving treatment costs of around 60,000 won per ton.

3.1 billion won support for industry research and development by the Ministry of Environment

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A conceptual diagram of a waste plastic high-temperature combustion system supported by the Ministry of Environment’s R&D funding. It is a concept of using waste plastics as fuel instead of coal. [자료 환경부]

– The Ministry of Environment, which has been troubled by illegal neglected waste, is also supporting the cement industry unknowingly, seeking a solution with the help of the cement industry.

Representatively, in 2019, it supported 700 million won for the development of a technology (plasma incinerator) using waste plastic fuel by the parent company.

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Waste plastic put into the cement kiln. Source: Ministry of Environment

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A scene where waste plastic is put into the kiln of a cement factory and burned. Source: Ministry of Environment

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Plasma torch developed to increase waste plastic combustion efficiency. Source: Ministry of Environment

– The Ministry of Environment also provided an additional 2.5 billion won to research and development related to pollution prevention and waste treatment remaining after incineration of waste plastics to the same company in 2020-2021.
The company is also known to invest more than 1 billion won in its own research fund.

The company official said, “It is difficult to disclose the detailed research progress at this time.”

Considering the amount of support from the Ministry of Environment of over 3 billion won, some observations are made that the Ministry of Environment intends to use 39 cement kilns nationwide as waste plastic treatment facilities.

Professor Dong-Hoon Lee of the Department of Environmental Engineering at the University of Seoul said, “In situations where waste plastics are not treated, a cement kiln that recovers energy by burning can be an important means.” “Advanced countries such as Germany are also using this method.”

In the case of Japan, there are 1,100 incineration facilities, so 15% of the waste plastics are used for kiln is relatively low.

Pollution controversy raised 15 years ago still

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The appearance of the kiln in a cement factory. Central photo

– A lot of waste has been burned in the kiln, but the fact that related research continues so far is a testament to the remaining tasks to be solved.

Concerns about incineration and pollution of kiln waste were first raised in 2006, and the Ministry of Environment also announced the “Cement kiln environmental management improvement plan” in 2008, but the contamination controversy remains.

Pastor Byung-Seong Choi, who has been dealing with cement as an environmental activist for a long time, said, “When waste is used in the kiln, air pollutants are discharged, and the quality of the cement itself is also problematic.” “Even though pollutants are discharged from the cement plant, the factory “The chimney TMS (remote monitoring system) pollution level is recorded as normal,” he pointed out.

When waste plastic mixed with polyvinyl chloride (PVC) is burned in a kiln, chlorine gas (hydrogen chloride) is generated, and when it is filtered in a pollution prevention facility, harmful dust containing a large amount of chlorine, that is,’chlorine dust,’ accumulates. Is to be.

Reclamation of chlorine dust costs around 170,000 won per ton, and the Ministry of Environment is not aware of how much it occurs nationwide.

Moreover, although Germany and others say that waste plastics are used, experts point out that it is necessary to examine whether Korea has reached the German level in the selection and pollution level of waste, and the pollution limit and monitoring of the exhaust gas of cement factories.

Concern about heavy metal contamination in cement

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Air pollutants that have not passed through pollution prevention facilities are discharged from a cement factory. Photo: Pastor Byung-Sung Choi

– Pastor Choi also said, “If you look at the results of the monthly tests released by the National Institute of Environmental Sciences, there is a big difference between those that burn waste and those that do not burn when looking at the content of cement heavy metals. In apartments using heavy metal cement, the health of residents such as atopic dermatitis Damage can occur,” he argued.

Regarding this, an official from the Cement Association said, “Because it is burned at a high temperature of 2000 degrees, which is much higher than 800 degrees in general incineration facilities, no pollutants are produced.” “To minimize the environmental impact, such as using a technology to produce calcium chloride by extracting only chlorine from chlorine dust. I am trying to do it,” he said.

The Cement Association explained that even if the cement contains heavy metals, if it enters the concrete and hardens, it will not elute beyond the standard.

Pastor Choi said, “Cement heavy metals do not dissolve in water, but the problem is that the concrete powder is blown and citizens are exposed,” said Pastor Choi. “Cement is given a quality grade, and cement that uses waste as fuel should be used for civil engineering purposes other than apartments. “I have to do it,” he refuted.

Citizen burden may increase

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Waste vinyl and waste plastic raw materials accumulated for the manufacture of waste solid fuel (SRF). Central photo

– Some point out that the burden on citizens increases as waste plastics are driven into the cement kiln.

Lee Jang-geun, chairman of the Korea Waste Resource & Energy Cooperative Association, said, “If you select waste to make and distribute solid fuel (SRF), citizens do not have to pay the cost, but if you treat it in a cement kiln, the citizens will eventually pay the cost.”

Because of the principle that waste should be disposed of within the generating area, SRF is having difficulties in expanding its facilities due to complaints, but it is pointed out that the cement industry is benefiting from not being subject to this principle.

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On November 16, last year, in front of the Gwangju City Hall in Seo-gu, Gwangju, the Countermeasures Committee against the Naju cogeneration plant is holding a resolution contest against the operation of the mobilized 220 vehicles. The Naju solid fuel (SRF) cogeneration facility, which was completed in December 2017 with an investment of 270 billion won, is not operating against the opposition of local residents. yunhap news

– “As the cement industry has invested in waste plastic facilities, treatment will increase in the future,” said Soo-Yeol, director of the Resource Recycling Socioeconomic Research Institute. “As much as invested in facilities, investments in pollution prevention should be increased, and local residents receive treatment costs. It is also necessary to expand the sharing of profits with the company.”

In this regard, the Cement Association emphasized the fact that the resident subsidy from 9 billion won in 2016 has increased significantly to 29 billion won last year.

“It is a misconception that the Ministry of Environment is expanding waste plastic treatment through cement kilns, and there is no plan to expand it further at the current level,” said Hong Dong-gon, Resource Recycling Policy Officer of the Ministry of Environment. “We will strengthen monitoring to prevent pollution and prevent damage to local residents. I plan to go out.”

Reporter Kang Chansu [email protected]



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