The potential of the circular economy of organic waste streams from pine bark

The process is presented in the management of solid waste of pine bark, which includes the recovery to obtain various products such as: compost, bio-solvents, ethanol and pellets. It is estimated that the conifers to which the pine belongs reach a volume of more than 230 million cubic meters and in the northern hemisphere, its surface is estimated at more than 4 billion hectares, of all this volume 10% comprises the bark. Likewise, it is a species of commercial interest due to its potential uses, therefore the technologies used to treat this organic waste is the chemical / biological transformation of sawdust and pine bark that accumulate in sawmills as waste from the production of sawn wood, and the obtaining of useful products to society such as compost and animal feed, among others, while contributing to environmental sanitation by eliminating this waste. Sawdust, chips, sprouts, among others, are stored in large hills or burned in boilers, without having a greater added value or achieving greater energy efficiency (Soto and Núñez, 2008). Although it forms a high volume as waste its low calorific value, due to its low density, is not included in the generation of energy, however due to its physical-chemical characteristics, according to the information analyzed, there are several studies that demonstrate its effectiveness in the use as substrate, compost, fertilizer, bio-absorbents and even the production of bio ethanol. There are several species used in the tests, of which P.radiata, P. caribaea and P. tadea stand out, however, studies also indicate that although they have similar characteristics, it is necessary to know their chemical composition before being applied as a substrate or as compost. In the production of compost, its efficacy with other compounds proved to be May. In the present study, the characteristics of pine bark and its valuation in three types of products were evaluated.