Biobed biopurification systems with agroindustrial wastes to remove organic contaminants from water: microbiological and molecular aspects
Metadatos
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Universidad de Granada
Departamento
Universidad de Granada.; Universidad de Granada. Programa de Doctorado en Bioquímica y Biología MolecularMateria
Biopurification systems Organic contaminants Biobed Agroindustrial wastes
Fecha
2021Fecha lectura
2020-12-10Referencia bibliográfica
Aguilar Romero, Inés María. Biobed biopurification systems with agroindustrial wastes to remove organic contaminants from water: microbiological and molecular aspects. Granada: Universidad de Granada, 2021. [http://hdl.handle.net/10481/65349]
Patrocinador
Tesis Univ. Granada.; Estación Experimental del Zaidín (EEZ-CSIC); Comisión Interministerial de Ciencia y Tecnología dentro del Programa de I+D+i orientada a los Retos de la Sociedad; FEDER; 2014 (FPI) (BES-2014-070043).Resumen
The continuous and uncontrolled release of organic pollutants such as
pesticides and pharmaceutical and personal care products (PPCPs) originating
from agricultural, industrial and urban activities affects water quality and can
have a negative impact on ecosystems and human health. Currently, treatment of
these wastewaters is expensive and the elimination of pollutants by conventional
activated sludge treatment is insufficient. For this reason, it is necessary to
develop affordable systems to prevent the transfer of these pollutants to the
environment. Biopurification systems (BPSs) have proven to be a highly efficient
technology to retain and degrade pesticides with diverse physicochemical
characteristics. The effectiveness of BPSs is closely related to the composition of
the biomixtures of which they are composed. Our research group has developed
biomixtures based on low-cost agro-industrial wastes abundant in Spain, which
are very efficient in the removal of pesticides and PPCPs even at high
concentrations. However, despite the high decontamination potential of these
systems little is known of the functioning of these BPSs at the microbiological and
molecular level and how they could be improved to reduce the degradation time
and elimination of even the most recalcitrant pollutants. Thus, the main objective
of this thesis is to deepen our understanding of these aspects of BPSs and to
improve their efficiency. For this purpose, the thesis has been oriented towards
the following specific objectives:
Objective 1: To determine the effects of PPCPs on bacterial viability and the
microbial community structure of BPSs as well as to identify the main bacterial
groups potentially involved in the degradation of these compounds.
Objective 2: To develop a novel low-cost bioaugmentation strategy based on
aqueous extracts rich in microorganisms to improve the elimination of pesticides
and PPCPs as well as their main degradation products from BPSs and
contaminated aqueous systems.
Objective 3: To increase the dissipation rate of PPCPs and avoid the
accumulation of their main metabolites in BPSs and in aqueous systems by
bioaugmentation with exogenous degrading bacterial strains isolated from
polluted environments.