Coupled photochemical-biological system to treat biorecalcitrant wastewater
| Autor: | Bernardí Bayarri, Verónica García-Molina, Carme Sans, Jordi Bacardit, Esther Chamarro, Santiago Esplugas, Jaime Giménez |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Biochemical oxygen demand
Minerals Environmental Engineering Waste management Chemistry Photochemistry Chemical oxygen demand Advanced oxidation process Water Biodegradation Carbon Water Purification Biodegradation Environmental Bioreactors Wastewater Biofilter 4-chlorophenol Biomass Biology Filtration Water Pollutants Chemical Water Science and Technology |
| Zdroj: | Water science and technology : a journal of the International Association on Water Pollution Research. 55(12) |
| ISSN: | 0273-1223 |
| Popis: | The aim of the present work is to study a coupled system to treat biorecalcitrant wastewaters. The combination consists of an advanced oxidation process (AOP) named photo-Fenton (Ph-F), which is a photochemical treatment and a sequencing batch biofilter reactor (SBBR). The synthetic wastewater used to optimise this process is a solution of 200 ppm of 4-chlorophenol (4-CP). The first part of the work is the study of the biodegradability enhancement achieved by the photochemical process, measured as the ratio between the biochemical oxygen demand (BOD5) and the chemical oxygen demand (COD). The second step is the start-up and optimisation of the biological process. The results showed that it is necessary to severely treat the toxic solution (with 500 ppm of [H2O2]0) in order to achieve more than 90% of TOC removal in the whole process. The photochemical and biological treatments lasted 50 minutes and 24 hours, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|