Spirometry parameter alterations due to exposure to indoor air pollutants in rural homes in Bogotá, Colombia.

The aim of this study was to determine the association between the concentrations of intradomiciliary PM, CO, and BC and alterations in respiratory function parameters in a population living in rural dwellings in Bogotá, Colombia. For this cross-sectional study, people were recruited from the rural areas of the localities of Usme and Sumapaz in Bogotá. In total, 68 participants were recruited by means of nonrandom sampling.

Use of coffee mucilage as a new substrate for hydrogen production in anaerobic co-digestion with swine manure.

Coffee mucilage (CM), a novel substrate produced as waste from agricultural activity in Colombia, the largest fourth coffee producer in the world, was used for hydrogen production. The study evaluated three ratios (C1-3) for co-digestion of CM and swine manure (SM), and an increase in organic load to improve hydrogen production (C4). The hydrogen production was improved by a C/N ratio of 53.