Study on Response Mechanism and Optimization of Heavy Metal Stress in Enhanced Biological Phosphorus Removal Based on Intracellular Storage Materials ... View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2014-2017

FUNDING AMOUNT

800000.0 CNY

ABSTRACT

The microorganisms in enhanced biological phosphorus removal (EBPR) have to face the dual responsibilities-heavy metal stress and water purification (phosphorus removal) due to the increasing heavy metal pollution in municipal wastewater. So the response of EBPR process to heavy metal stress is a comprehensive and complicated process. Therefore, we will investigate the response mechanism and optimal regulation of EBPR process to heavy metal stress based on intracellular storage compounds and related functional enzymes. Main research contents include: Based on the observation of the dynamic changes of intracellular storage compounds (PHA、polyP and glycogen) and the identification of microbial populations by molecular biology technology,the relationship between the intra- cellular storage compounds, microbial populations and phosphorus removal efficiency of EBPR process under heavy metal stress will be established and the response mechanism of EBPR process to heavy metal stress will be revealed. The tracking study will be performed to understand the translocation and accumulation of heavy metal in polyphosphate accumulating organisms (PAOs). The enzyme production, enzyme kinetics, and metabolic products will also be studied in the presence of heavy metal. The response mechanisms of PAOs to heavy metal stress will be understood scientifically in terms of enzyme kinetics and metabolism pathway of phosphorus. An optimal regulation technology of EBPR process under heavy metal stress will be developed according to the combination of response mechanisms and dynamic changes of response index under enhanced regulation measures. The study will deepen theoretically the understanding of Influence mechanism of heavy metal to EBPR process and provide a theoretical basis to practical engineering application. More... »

URL

http://output.nsfc.gov.cn/conclusionProject/aa07898d6ef91b9d5ff0c30b771d34b2

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