Agronomic properties of biochars from different manure wastes

Abstract

a b s t r a c tBiochar research has focused in the last years in the use of wood or grass derived materials for carbon sequestration. However, manure derived biochar can provide other benefits after soil addition, including nutrient supply. At present, there is an incomplete understanding of pyrolysis on manures. In order to understand the benefits obtained after addition of these types of materials to the soil, an experiment involving the use of different manures and pyrolysis temperatures was performed. Five manure wastes were selected for this experiment: cattle manure (E); cattle manure mixed with straw (EP), chicken manure (G), chicken manure mixed with sawdust (GS) and pig slurry (PC). Unpyrolyzed samples were compared to biochars prepared at 300 and 500 • C. Relevant properties for agronomic purposes were determined, including pH, electrical conductivity, nutrient content, metal content, proximate analysis and carbon thermostability. Our results show that biochars tailored for different purposes can be prepared after a careful choice of feedstock and pyrolysis temperature.

Impact of thermal treatment of mixtures of sewage sludge and plant material on selected chemical properties and Vibrio fischeri response

“…Better effects, not only in terms of the environment, but also in terms of technology, can be achieved after mixing sewage sludge with plant waste materials, such as cereal straw, sawdust or bark. The addition of these materials leads to dilution of the content of trace elements, and it also improves the conditions for conducting the thermal process by influencing the structure of the treated mass [19].…”

Potencial de producción de biochar en España a partir de residuos de la industria papelera, de lodos de E.D.A.R., de residuos sólidos urbanos y de residuos ganaderos: Estudio de la fijación de carbono

“…De hecho, el biochar a partir de residuos ganaderos se podría utilizar como fertilizante de liberación lenta . Por lo tanto, la preparación de biochar a partir de la pirólisis de residuos orgánicos es un interesante método de valorización de los mismos (Cely et al, 2015).…”

“…Respecto a los rendimientos en pirólisis de estos residuos; en la Tabla 3.4 s mu s n s n imi n s bi ch C C is in s residuos ganaderos estudiados por Cely et al (2015) y que se tomarán para el cálculo de la producción potencial de biochar a partir de dichos residuos.…”

“…Cely et al (2015). Tal como muestra la Tabla 3.4, los rendimientos más altos en biochar se obtienen en la pirólisis de los purines de cerdo, debido a su alto contenido en cenizas, y en la gallinaza, como consecuencia de su alta carbonización a bajas temperaturas.…”

“…El contenido en materia orgánica del biochar de residuos ganaderos se calculará a partir de los contenidos en cenizas publicados por Cely et al, (2015) Cantidad de biochar necesaria para aumentar en un 1% la materia orgánica de los suelos:…”