Enhancing Microplastics Removal from Wastewater Using Electro-Coagulation and Granule-Activated Carbon with Thermal Regeneration
| Autor: | Sanghwa Park, Keug Tae Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Microplastics
congenital hereditary and neonatal diseases and abnormalities microplastics granule activated carbon Electro coagulation electro coagulation Bioengineering 02 engineering and technology 010501 environmental sciences lcsh:Chemical technology 01 natural sciences lcsh:Chemistry medicine Chemical Engineering (miscellaneous) lcsh:TP1-1185 skin and connective tissue diseases 0105 earth and related environmental sciences Chemistry Process Chemistry and Technology Regeneration (biology) Granule (cell biology) nutritional and metabolic diseases 021001 nanoscience & nanotechnology Pulp and paper industry pyrolysis Wastewater lcsh:QD1-999 Sewage treatment 0210 nano-technology Pyrolysis Activated carbon medicine.drug |
| Zdroj: | Processes, Vol 9, Iss 617, p 617 (2021) Processes Volume 9 Issue 4 |
| ISSN: | 2227-9717 |
| Popis: | Discharge from sewage treatment plants (STPs) is a significant pathway of entry for microplastics (MPs) to the environment. Therefore, STPs should be considered as an important barrier to the distribution and circulation of MPs in the aquatic environment. In this study, the fate and material-specific properties of MPs were investigated in an STP-equipped and granule-activated carbon (GAC) tower with a thermal regeneration system. This system functioned with a tertiary treatment unit. The GAC with thermal regeneration removed 92.8% of MPs and was useful for removing MPs with a specific gravity less than that of water and with a size of 20–50 µm, which had negligible removal in the conventional STP process. In addition, a lab-scale electric-coagulation experiment was conducted to examine its potential utility as a pretreatment process for further enhancing the removal efficiency of MPs by GAC. After 30 min of electro-coagulation using aluminum electrodes, 90% of MPs were converted into separable flocs by centrifugation. These flocs may be effectively removed by GAC or other tertiary treatment steps. This study demonstrates that GAC with thermal regeneration is a tertiary process that can efficiently prohibit the release of MPs from STPs and circulation of MPs in the natural environment. |
| Databáze: | OpenAIRE |
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