Incorporating the oxic-settling-anaerobic (OSA) process into an anoxic-oxic system for sewage sludge reduction and nutrient removal
| Autor: | Pablo Maria Romero Pareja, María Dolores Coello Oviedo, Carlos Alberto Aragon Cruz, José María Quiroga Alonso |
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| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Renewable Energy Sustainability and the Environment General Chemical Engineering Environmental engineering 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology Pulp and paper industry 01 natural sciences Anoxic waters Nutrient Activated sludge Enhanced biological phosphorus removal Wastewater Environmental Chemistry Sewage sludge treatment Environmental science 0210 nano-technology Waste Management and Disposal Anaerobic exercise Sludge 0105 earth and related environmental sciences General Environmental Science Water Science and Technology |
| Zdroj: | Environmental Progress & Sustainable Energy. 37:1068-1074 |
| ISSN: | 1944-7442 |
| Popis: | The production of sludge in biological wastewater treatments is a growing problem worldwide as it entails economic, environmental, and health problems. The oxic-settling-anaerobic (OSA) process is one of the techniques that have been developed to reduce the sludge produced in the activated sludge process (ASP). This article reports the feasibility of the application of the OSA process in a nutrient removal system, specifically, in an anoxic–oxic (A) process. The results reveal TN removal in the A + OSA system of 68.84% and 69.91% (for 7 and 11 h of sludge anaerobic exposure time, SAET, respectively) versus 38.02% and 32.47% in the OSA system with similar SAET. The percentage sludge reductions obtained were, respectively, 22.41% and 31.93% in the OSA system and 23.53% and 32.49% in the A + OSA system compared to the sludge produced in the conventional ASP. The study confirms the suitability of the application of the OSA process in a nutrient removal system, as nutrient removal performances are not affected, while at the same time achieving higher sludge reduction. © 2017 American Institute of Chemical Engineers Environ Prog, 2017 |
| Databáze: | OpenAIRE |
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