Department of Grassland Science and Renewable Plant Resources, Kassel University, Steinstrasse 19, Witzenhausen, 37213, Kassel, Germany,
Environ Sci Pollut Res Int. 2015 May;22(10):7808-20. doi: 10.1007/s11356-014-3881-9. Epub 2015 Mar 25.
Grass from municipal roadside verges is a potential yet largely unused resource for bioenergy recovery, which is mainly due to its unknown elemental composition. Therefore, we measured the concentration of 16 elements (Ca, K, Mg, N, Na, P, S, Al, Cd, Cl, Cr, Cu, Mn, Pb, Si and Zn) in a material from the city of Kassel harvested in different management intensities. The element concentrations were mainly close to reference values of agricultural or nature conservation grassland and usually within the range of literature data. Concentrations of most elements, including heavy metals, were below limiting values. Only N and Cl concentrations in the raw material exceeded the limiting values for combustion, but washing and dewatering of the biomass with the "integrated generation of solid fuel and biogas from biomass" technique resulted in concentrations in the press cake well below the limiting values. Considering the element concentrations of grass from urban roadside verges, utilisation for energy recovery may be possible, provided an appropriate technology is applied.
路边草坪是生物能源回收的潜在资源，但尚未得到充分利用，主要原因是其元素组成未知。因此，我们测量了卡塞尔市不同管理强度下收割的材料中 16 种元素（Ca、K、Mg、N、Na、P、S、Al、Cd、Cl、Cr、Cu、Mn、Pb、Si 和 Zn）的浓度。这些元素浓度主要接近农业或自然保护草地的参考值，且通常在文献数据范围内。大多数元素（包括重金属）的浓度均低于限值。只有原料中的 N 和 Cl 浓度超过了燃烧的限值，但采用“从生物质中综合生成固体燃料和沼气”技术对生物质进行清洗和脱水后，压饼中的浓度远低于限值。考虑到城市路边草坪草的元素浓度，如果采用适当的技术，其能源回收利用是可行的。
