Exhausted Granulated Activated Carbon From Fresh Water Production: Reactivation By Use Of Microwave Heating

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25006096%3A_____%2F19%3AN0000008" target="_blank" >RIV/25006096:_____/19:N0000008 - isvavai.cz</a>

Result on the web

<a href="https://www.aquaconsoil.org/assets/acs_2019_abstracts.pdf" target="_blank" >https://www.aquaconsoil.org/assets/acs_2019_abstracts.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Exhausted Granulated Activated Carbon From Fresh Water Production: Reactivation By Use Of Microwave Heating

Original language description

The contribution refers about pilot-scale reactivation of the exhausted granulated activated carbon (GAC) using different heating methods including microwave irradiation. Since water resources are widely contaminated by low concentrations of many artificial trace chemicals (pesticides and PPCP = pharmaceuticals and personal care products), an additional treatments steps have been being installed on fresh water production plants. This final treatment step is based on the GAC adsorption of trace chemicals from the water which passes through the standard technological lines. The GAC application for fresh water production is the growing field in the Czech Republic and this is why also exhausted GAC processing will be the task of a great importance. Our regeneration (550 - 600°C) / reactivation (650 - 900°C) process was tested in new pilot-scale facility in batch rotary kiln heated either by electrical furnace or by microwaves. The real sample of exhausted GAC from the fresh water production plant was used for experiments under various conditions. The best results have been achieved in case of microwave heating on 800°C combined with an addition of steam as a reactivation agent (30 minutes). The BET surface area of the reactivated GAC was then 1310 m2/g (new GAC has usually less than 1000 m2/g) with burn-off (loses of the GAC by the process) only about 6 % of dry matter. On the other hand, the reactivation by indirect electrical heating under 700 °C with steam for 60 minutes provided BET of 910 m2/g and burn off 10 %. Together with three times faster heating in comparison with traditional indirect heating systems, the microwaves look to be a promising reactivation heating method. However, suitable operational plant design must be developed.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

<a href="/en/project/TH02030105" target="_blank" >TH02030105: Racionalization of handling with exhausted activated carbon based adsorption materials</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů