Producció de biogàs per digestió i co-digestió anaeròbia de microalgues pretractades i fangs primaris
Year: 2015
Type: dissertation
Abstract: Natural systems of high rate algal ponds (HRAP) are presented as an alternative to conventional systems for wastewater treatment. The water treatment is carried out thanks to the symbiosis between heterotrophic bacteria that degrade organic matter, and algae, which through photosynthesis provide the necessary oxygen for aerobic bacteria. On the other hand, the algal biomass can be evaluated in anaerobic digesters to produce biogas. However, this digestion process is limited by the slowness of the microalgae cell wall degradation and high nitrogen content which can cause inhabitation of the activity of methanogenic microorganisms. To solve these limitations, the present paper presents two improvement strategies: conducting a thermal pretreatment at 75 ºC to hydrolyze the microalgae cell wall and anaerobic co-digestion of the algal biomass which primary sludge from Wastewater Treatment Plants (WWTP) that allows the shortcomings of both substrates to be balanced. The aim of this project was therefore to evaluate the anaerobic digestion of algal biomass pretreated thermally and at the same time to study the co-anaerobic digestion of algal biomass pretreated (25% SV) with primary sludge (75% SV).
Author: Sofia Aleman Alonso
Language: Catalan
Field: Energy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W811563400