Chemical studies of parameters and composition of lignocellulose raw material samples of municipal origin

As a result of analytical studies, the main types of lignocellulose raw materials of communal origin were established (using the example of the city of Kyiv). It was found that the most common and promising for use in biofuel technologies are the following types of lignocellulose raw materials in groups: 1) lawn grass; roadside grass; 2) green trimmings of maple, linden, poplar, chestnut, oak, birch; 3) fallen leaves of maple, linden, poplar, chestnut, oak, birch. These types of trees make up 91.6% of the number of all perennial plantations, excluding coniferous trees (based on the analysed data of municipal enterprises of Kyiv). The largest share of fallen leaves (92.9%) is formed by three types of trees — poplar, maple and chestnut. Chemical studies were conducted on the composition of these types of raw materials, as well as three types of miscanthus and sugar sorghum, as plants that can take a promising place in urban landscapes. As a result of chemical studies, it was found that the highest ash content (mineral component) was observed in the dry matter of roadside grass (31.63%), fallen birch leaves (31.17%) and lawn grass (17.53%), the highest content of lignin is in fallen poplar leaves (30.29%), oak trimmings (29.41%) and fallen oak leaves (27.63%), the highest cellulose content is in miscanthus plants of all species (42.2346.00%), sugar sorghum (34.07%) and fallen birch leaves (31.79%), hemicelluloses — in fallen maple leaves (36.66%), roadside grass (33.97%) and sugar-flowering miscanthus (33.96%), water soluble substances — in plants of sugar sorghum (33.62%), trimmings of linden (22.81%) and poplar (22.57%), pitches and fats — in fallen birch leaves (14.71%), fallen oak leaves (9.82%) and trimmings of birch (8.73%). The obtained results allow us to determine the most promising types of raw materials of communal origin for use in technologies of liquid and gaseous biofuels.