The project involves the construction of a waste storage hall as part of a bio-waste treatment plant in Krzyżanówek. The construction of the hall will modernize the operation of the bio-waste treatment plant. As part of the investment, it is planned to: construction of a hall equipped with ventilation systems and devices as well as high-speed gates, will prevent the ingress of odours and dust into the air and reduce secondary pollution of bio-waste by external environmental factors such as: air supply from other waste, bird droppings, etc. The municipal installation at the Waste Management Plant in Krzyżanówek was divided according to the type of process carried out, including the composting of green waste, resulting from the separate collection of municipal waste, under which the composting process of separately collected bio-waste is carried out. The composting process is carried out in two stages: Phase I – intensive phase, carried out in 4 bioreactors (1 module). Process carried out max. 35 days stage II – ripening phase, carried out on the ripening site, for a period of 10 weeks. In order to achieve the final product, it is therefore necessary to carry out the second phase of stabilization and composting - ripening on the square. According to the provisions of the Integrated Permit for the Installation, the total area of the square, which is dedicated to the biological treatment of waste, is approx. 8 000 m2, of which the part dedicated to process needs is approx. 6 800m2, i.e. the surface is designed for maturing prisms from the composting process – approx. 1 200 m2 and stabilisation process – approx. 5 600 m2. The remaining part of the site is intended for temporary storage of material and valorisation of waste/product – as a result of the investment, this part of the waste treatment process will be transferred to the built warehouse, replacing the maturing site in this respect in the process. The maturing area used so far for storing the material will be able to be used in other processes, e.g. for composting. It should be added that storage is a necessary element of the bio-waste treatment process, because if the amount of waste is insufficient to carry out the process, the waste should be stored until sufficient quantities have been collected. Green waste (bio) after initial storage in the hall is directed to the production ofa measure improving the properties of the soil. The process involves the initial shredding of waste using a mobile shredder, followed by aerobic composting, in special tunnels, during which the waste is aerated and irrigated if necessary. After composting is completed, the waste is screened on a mobile sieve. The final product and uncomposted plant particles and other contaminants (waste 19 05 03) are directed, among others, to the rehabilitation of the landfill. The final product, after testing by an accredited laboratory and verification of compliance with the decision of the Minister of Agriculture, is placed on the market.