Direct Measurements of the Mass of Municipal Biowaste Separated and Recycled at Source and Its Role in Circular Economy and the Demanded Increasing Recycling Rate

The study, the first to be conducted on a large scale in Poland and the EU countries, aimed to determine the actual mass of BHrecycled (kitchen waste (BK) per capita per year (kg/(capita·year)) and garden waste (BG) per square meter of green area (kg/(m2·year)) in 1150 households that use an active composting unit located in more than 400 municipalities in all the voivodeships in Poland. Each municipality is characterized by individual MSW generation (MSWG) values (the amount of waste generated per capita per year). The MSWG values of the municipality where the household was located were used to group the data of BK and BG. In Poland, the average masses of BK and BG remained within the ranges of 81.02–107.49 kg/(capita·year) and 1.02–2.87 kg/(m2·year), respectively, across the MSWG value. However, there was no clear statistical relationship between MSWG value and BK or BG. The average masses of BK and BG were ca. 97 kg/(capita·year) and ca. 2 kg/(m2·year). These results enable the determination of the total amount of BHrecycled in Poland. By incorporating these findings into waste management, strategies, monitoring, and reporting practices can be improved. Moreover, it promotes compliance with EU recycling targets.