The combustion of lignite at the Bełchatów plant produces fly ash and furnace slag, and synthetic gypsum (as a product) as a result of flue gas desulphurisation. The predominant direction of the management of substances arising from the combustion of fuels is the disposal at the combustion waste dumps „Zwałowisko” (the area of the former open pit of the Bełchatów Field) and Lubień (the above-ground dump located to the west of the Bełchatów plant).
Fly ash from ash removal processes in electric precipitators is transported to retention tanks, where each has a working capacity of 1 800 m3 and is equipped with 1 or 2 loading sleeves depending on the type of tank and ash. The volume of ash which was not collected by external customers is directed to the suspension production and transport installation and is deposited in the „Lubień” landfill. The second type of waste produced during the combustion of lignite is slag, which is transported hydraulically to the „Zwałowisko” landfill.
At present, the Bełchatów plant operates three landfills for non-hazardous and inert waste – the „Zwałowisko” and „Lubień” landfills, where ash-slag mixture is stored, and the „Rogowiec” landfill, where gypsum waste and partly waste from production that can no longer be recovered are stored.
Part of the fly ash is considered a by-product and can be further managed as a product in accordance with the relevant administrative decision. It is advisable to increase the volume of such management, which will lead to a reduction in the amount of waste deposited in furnace waste landfills.
Work is currently in progress to develop the use of the entire volume of ash-slag mixture produced at the Bełchatów plant. It is assumed that more and more ambitious targets will be set in this regard from year to year.
The entire volume of gypsum produced at Elektrownia Bełchatów is sold to market customers, with by far the largest volumes being taken by a major building materials manufacturer.