The construction of Poznań's incinerator is moving forward as planned. The plant is seeing new sections of the technological line arise, including grate and boiler components.
By using the many years of experience of countries such as Sweden, Germany, Denmark and France, the Poznań plant will operate based on grate combustion technology. This method is used in nearly 95% of existing facilities of this type in Europe. In total, there are over 500 of them. ‘We focus on proven, efficient solutions that are also safe and environmentally friendly’, said Bożena Przewoźna, Director of the Municipal Economy Department of the City of Poznań.
The grate incineration method has been known for decades, and at the present level of development this modern technology is the most proven and mature method of processing waste, ensuring both control over the combustion process and compliance with strict environmental standards. Modern incinerators built with this technology are equipped with extensive and effective flue gas cleaning systems. In addition to minimal pollution, its advantages include high combustion efficiency, reliability and cost efficiency. Communal waste incinerators are being built based on this technology in other Polish cities in addition to Poznań – in Konin, Bydgoszcz, Szczecin, Białystok and Kraków. Grate technology is also being used in the construction of four incinerators in the United Kingdom, and will also be used by the Danes in their ultra-modern incinerator Amager Bakke in Copenhagen, which is already being called 'an incinerator of the future', that will also fulfil the role of an urban recreation area and won't be completed until 2017.
In recent years, a plasma waste incineration technology has emerged; however, it is at the experimental stage in terms of municipal waste incineration. Plasma technology is suitable for the destruction of hazardous waste such as ammunition and asbestos, but not ordinary waste generated by households and companies. Furthermore, it is a very energy-intensive method, and the cost of implementing such an investment is very high, which could bring a negative impact on waste fees borne by residents.
‘Taking into account the results achieved by modern grate technologies, the plasma method at the present level of development is not economically viable as a method of processing municipal waste’, said Szymon Cegielski, Director of the SITA Zielona Energia sp. z o.o. Contract. ‘Other methods of thermal processing of municipal waste, such as gasification and pyrolysis, have a very low energy efficiency ratio (much less than 0.6), while grate technology installations achieve this ratio at a level of 0.70 to 1.2, compared with the 0.65 required by the Act on Waste. This means that in the case of MWTTP we are dealing with recovery of energy and renewable energy production, which means that MWTTP is an ecological investment’, he adds.
It is worth knowing that Polish incinerators, including the Poznań one, are designed and built in accordance with best available techniques (BATs). This means that they will be equipped with the latest available solutions to meet stringent environmental standards of Polish and EU law.
Soon the first tonnes of waste from Poznań and nine nearby communes will be converted into electricity and heat. In accordance with regulations, including the assumptions of the Voivodship Waste Management Plan, there is a possibility of expanding the project to other local governments. The facility will manage not only mixed (residual) waste, but also that from further cleaning of waste collected separately and bulky waste. The maximum capacity of the system is 210 000 tonnes/year.