Removal efficiency of dissolved organic matter from secondary effluent by coagulation-flocculation processes
| Autor: | Sidney Seckler Ferreira Filho, Fabiane Dörr, Ernani Pinto, Natália Rodrigues Guimarães, Rodrigo de Oliveira Marques |
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| Rok vydání: | 2020 |
| Předmět: |
Flocculation
Environmental Engineering Wastewater 010501 environmental sciences Waste Disposal Fluid 01 natural sciences Water Purification Dissolved organic carbon Zeta potential Coagulation (water treatment) Organic matter Organic Chemicals Effluent 0105 earth and related environmental sciences Biological Oxygen Demand Analysis chemistry.chemical_classification Sewage 010401 analytical chemistry General Medicine Pulp and paper industry 0104 chemical sciences Activated sludge Solubility chemistry Alum Compounds Sewage treatment |
| Zdroj: | Journal of Environmental Science and Health, Part A. :1-10 |
| ISSN: | 1532-4117 1093-4529 |
| DOI: | 10.1080/10934529.2020.1856580 |
| Popis: | Wastewater reuse has been widely discussed as an essential strategy to minimize the consumption of drinking water for less noble purposes. During biological wastewater treatment, organic matter is converted into a complex matrix containing a variety of soluble organic compounds. The objective of the present study was to evaluate the removal efficiency of the residual organic load in the final effluent from wastewater treatment plant with a conventional activated sludge process by different coagulants and parameters of coagulation-flocculation process, using dissolved organic carbon (DOC) concentration, molecular weight (MW) size distribution by size exclusion chromatography (SEC) coupled to mass spectrometry (MS), and zeta potential (ZP) analyses. The results showed a DOC removal efficiency up to 45% with iron chloride, and of 38% for aluminum sulfate and 31% for PAC coagulants. ZP was also measured during the procedures and authors conclude that the ZP also does not have a determining role in these removals. SEC and MS assessment was able to detect changes on secondary effluent molecular weight distribution profile after effluent coagulation-flocculation, this technique might be a promising tool to understand the composition of effluent organic matter and be helpful to estimate and optimize the performance of wastewater effluents treatment processes. |
| Databáze: | OpenAIRE |
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