Physicochemical treatment of pyrolysis aqueous products : TS/VS and UV-vis analysis
Boiarov, Konstantin (2025)
2025
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2025051411583
https://urn.fi/URN:NBN:fi:amk-2025051411583
Tiivistelmä
This thesis aims to unleash the potential of complex treatment for catalytic fast pyrolysis side water product. The study was conducted as a continuation of fast pyrolysis water treatment research.
This work investigates a combined treatment approach for CFP water subprod-uct, divided into two phases. The first one is coagulation-flocculation treatment to remove colloidal and suspended solids, and electrochemical oxidation as a second treatment method to degrade residual dissolved organics.
The whole treatment efficiency was valued by total solids and volatile solids to indicate particulate matter removal. Also, UV-Vis Spectroscopy to track organic pollutant degradation via absorbance changes. The TS/VS analysis showed both organic and inorganic pollution in water samples, with a significant de-crease in organic compounds after CF and EO treatment (from ~2,15 g/L to ~1,31 g/L for SG1 and from ~40 g/L to ~0,81 g/L for SG2). The UV-Vis analysis showed high absorbance values at the late treatment; nevertheless, according to the obtained data, the whole process in general was successful and allowed for finding the optimum time frame for purification.
Further studies are needed on the treatment mechanism and to explain differ-ences in the results between initial samples from different groups and minor differences between water samples from different fields.
This work investigates a combined treatment approach for CFP water subprod-uct, divided into two phases. The first one is coagulation-flocculation treatment to remove colloidal and suspended solids, and electrochemical oxidation as a second treatment method to degrade residual dissolved organics.
The whole treatment efficiency was valued by total solids and volatile solids to indicate particulate matter removal. Also, UV-Vis Spectroscopy to track organic pollutant degradation via absorbance changes. The TS/VS analysis showed both organic and inorganic pollution in water samples, with a significant de-crease in organic compounds after CF and EO treatment (from ~2,15 g/L to ~1,31 g/L for SG1 and from ~40 g/L to ~0,81 g/L for SG2). The UV-Vis analysis showed high absorbance values at the late treatment; nevertheless, according to the obtained data, the whole process in general was successful and allowed for finding the optimum time frame for purification.
Further studies are needed on the treatment mechanism and to explain differ-ences in the results between initial samples from different groups and minor differences between water samples from different fields.