HIGH QUALITY FERTILIZERS BASED ON BIOMASS PYROLYSIS BIO-OIL AND CHAR

摘要

This work is focus on describing the composition, lixiviability and effects on the plants of a novelNPK-C slow release organic fertilizer and soil improver based on biomass pyrolysis bio-oil fraction and char.A dual product-component, charcoal and oligomeric lignin, can be considered as a flexible matrix in the formulationof fertilizers, where a range of nutrients and additives could be included. Thus, a unique and valuable fertilizer foragricultural and horticultural applications can simply be specified and then formulated, which also can also returnbio-carbon to the soil (carbon sequestration in form of solid organic carbon).The aim is to enhance the economic viability of the fast pyrolysis process, producing high value chemicals from partof the liquid and solid products, in this case high quality organic fertilizers.First plant growing test showed promising results. The treatments with novel fertilizers based on pyrolysis productscompared to the control treatment showed better results in: germination percentage, biometric parameters (stemheight, leaves′ number, etc) and physiological responses (chlorophyll level and fluorescence).Based on the first measurements, the NPK 8-16-8 had better results as a fertilizer. Nevertheless, different parametersevolution indicate that the slow release treatments based on the novel fertilizer need more time to achieve the plantgrowth but it reached higher values than the commercial one with the time. Leaching test results will evaluate thisnovel fertilizer slow release effect.The next step will be to design a longer duration plant growing test phase to study slow release effects on plants andover consecutive plantings without any extra fertilizer addition. More factors could be considered, such as differenttreatment concentration and composition, plant species, plant growing phases, etc.