Recovery of particulate matter from a high-rate moving bed biofilm reactor by high-rate dissolved air flotation
| Autor: | Peter Dold, Oscar Sanchez, Edith Laflamme, Antoine Laporte, Alain Gadbois, Marc-André Labelle, Yves Comeau |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
High rate
Moving bed biofilm reactor Dissolved air flotation 0208 environmental biotechnology Environmental science 02 engineering and technology 010501 environmental sciences Particulates Pulp and paper industry 01 natural sciences 020801 environmental engineering 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Water Quality Research Journal. 53:181-190 |
| ISSN: | 2408-9443 1201-3080 |
| DOI: | 10.2166/wqrj.2018.003 |
| Popis: | High-rate biological wastewater treatment processes for carbon recovery are able to improve the energy balance and carbon footprint of water resource recovery facilities. Combination of a high-rate moving bed biofilm reactor (HR-MBBR) with a rapid flotation (HR-DAF), as a replacement for the ‘A stage’ of the A-B process, can achieve this objective. The main goal of this study was to maximize the capture of biodegradable particulate matter from an HR-MBBR effluent by an HR-DAF. A pilot-scale HR-DAF process was operated downstream of an HR-MBBR treating screened municipal wastewater. The particulate biodegradable matter recovery was evaluated by determining the total suspended solids (TSS) removal efficiency. TSS recovery in experiments without chemicals at low surface loading rates (25%) was 94 ± 1%. By using a tannin-based polymer, the solids capture efficiency of the HR-DAF was slightly improved with TSS recovery reaching 96 ± 1% at a high SLR (at least 22 m/h) and low recycle ratio (14%). The anaerobic biodegradability of the tannin tested was determined to be 17%. The HR-DAF process downstream of an HR-MBBR gave a very good particulate matter recovery that offers a promising alternative to the A-B process for carbon recovery. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|