Journal
WATER RESEARCH
Volume 242, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2023.120245
Keywords
Biofilm; Granule; Wastewater; Selector; Intensification; Model
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Significant advances have been made in the use of biological and physical selectors in continuously flowing biological wastewater treatment processes, allowing for the development of large biological aggregates and enhancing liquid and solids separation. These processes offer benefits including reduced footprint, lower costs, and improved treatment performance.
There have been significant advances in the use of biological and physical selectors for the intensification of continuously flowing biological wastewater treatment (WWT) processes. Biological selection allows for the development of large biological aggregates (e.g., mobile biofilm, aerobic granules, and densified biological flocs). Physical selection controls the solids residence times of large biological aggregates and ordinary biological flocs, and is usually accomplished using screens or hydrocyclones. Large biological aggregates can facilitate different biological transformations in a single reactor and enhance liquid and solids separation. Continuous-flow WWT processes incorporating biological and physical selectors offer benefits that can include reduced footprint, lower costs, and improved WWT process performance. Thus, it is expected that both interest in and application of these processes will increase significantly in the future. This review provides a comprehensive summary of biological and physical selectors and their design and operation.
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