Modernization of the sludge-biogas section of the Sewage Treatment Plant in Starachowice

As part of the contract, the sludge-biogas section of the sewage treatment plant in Starachowice was modernized. The modernization was aimed at improving sludge management, with particular emphasis on reducing the amount of sludge, the management of which is one of the main components of operating costs.

As a result of the technologies and devices used in the project (including centrifuges), the amount of sediment produced in the sewage treatment plant was reduced. The second important element was the installation of a cogeneration unit, which produces electricity and process heat as a result of burning biogas (obtained through fermentation in fixed dome digester tanks). Both elements are used for the sewage treatment plant’s own needs, which also reduces the operating costs of the sewage treatment plant.

 

The scope of the contract included two projects: “Design and construction of the Municipal Waste Disposal Plant in Olsztyn” and “Design and construction of an access road to the Municipal Waste Disposal Plant”. The EPC project included the construction of a mechanical-biological Waste processing plant in Olsztyn. The following solutions were used as part of the task: sorting, recycling of demolition waste, production of RDF in the biological drying process.

 

As part of the project, an installation for mechanical and biological processing of mixed municipal waste was built, which included, among others, a sorting plant, a waste composting installation and an alternative fuel production line.

The turnkey implementation of a Mechanical-Biological Waste Processing Plant included the construction of a sorting plant, a composting plant and a dry horizontal fermentation line. The plant also has a production unit for electricity and heat, obtained from the combustion of the produced biogas. The plant provides services to a region with 210,000 residents.

As part of the project, a number of technological facilities were completed, including: a waste composting shelter, technological sewage tanks, a pumping station, a coalescing separator and a mixed municipal waste sorting hall. The scope of works also included the construction of a 24,000 m² non-hazardous waste storage facility.

As part of the general contracting, comprehensive design and construction work was carried out. The scope of work included the development of a construction project and obtaining all environmental permits and decisions. As part of the construction work, a number of technological facilities were constructed, including the full supply of machinery and equipment, as well as assembly and installation work, to the extent necessary to achieve the assumed effects of the investment.

The modernization and expansion of the treatment plant was aimed at increasing the efficiency of the treatment plant and changing the treatment technology to the extent that it would allow for the reduction of nutrients and sewage sludge. The investment included the construction of technological pipeline networks, sludge dewatering and hygienization installations, the installation of a biogas tank and the modernization of fermentation chambers. The scope of works also included the construction and modernization of I&C and electrical devices and installations.