The unique perspective that microalgae biomass presents for bioenergy production is currently being strongly considered. This type of biomass production involves large amounts of nutrients, due to nitrogen and phosphorous fertilizers, which impose production limitations. A viable alternative to fertilizers is wastewater, rich in essential nutrients (carbon, nitrogen, phosphorus, potassium). Therefore, Arthrospira platensis was cultivated in 150 mL photobioreactors with 70% (v/v) with the wastewater from a dairy industry, under a regime of light:dark cycles (12 h:12 h), with an irradiance of 140 μmol m−2 s−1 photon. The discontinuous cultures were inoculated with an average concentration of chlorophyll-a of 13.19 ± 0.19 mg L−1. High biomass productivity was achieved in the cultures with wastewater from the dairy industry (1.1 ± 0.02 g L−1 d−1). This biomass was subjected to thermal and physical treatments, to be used in co-digestion with cattle manure. Co-digestion was carried out in a mesophilic regime (35 °C) with a C: N ratio of 19:1, reaching a high methane yield of 482.54 ± 8.27 mL of CH4 g−1 volatile solids (VS), compared with control (cattle manure). The results demonstrate the effectiveness of the use of cyanobacterial biomass grown in wastewater to obtain bioenergy.
Se presenta una lista y descripción morfológica de 11 especies de saurios que se registraron en la Estación Científica Pedro Franco Dávila, ubicada en el recinto de Jauneche, en la provincia de Los Ríos. El trabajo de campo se realizó en el periodo comprendido entre mayo hasta septiembre del 2015. Se utilizó la metodología de la técnica de búsqueda directa y observación visual en todo tipo de microhábitats y vegetación como árboles, troncos secos, hojarascas, entre otros. Como resultado se recolectaron un total de 68 individuos distribuidos en seis familias, seis géneros y 11 especies. Considerando la diversidad, los siguientes géneros han sido registrados: Anolis (Dactyloidae) con tres especies, Gonatodes (Sphaerodactylidae), Holcosus (Teiidae) y Stenocercus (Tropiduridae) cada uno con dos especies, en tanto que Alopoglossus (Gymnophthalmidae) e Iguana (Iguanidae) presentaron una especie respectivamente. Gonatodes es el género más abundante debido a la presencia de G. caudisculatus y G. concinatus con el 44 y 22 %, respectivamente en el interior del bosque, mientras que en la zona externa del mismo Holcosus septemlineata lo fue con 40 %, evidenciándose además en esta área una mayor diversidad de sauria.
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