| Autor: |
Wright, W F, Schroeder, E D, Chang, DPY |
| Jazyk: |
angličtina |
| Rok vydání: |
2005 |
| Zdroj: |
Wright, W F; Schroeder, E D; & Chang, DPY. (2005). Regular transient loading response in a vapor-phase flow-direction-switching biofilter. Journal of Environmental Engineering-ASCE, 131(12), 1649-1658. UC Davis: Retrieved from: http://www.escholarship.org/uc/item/6qp976f8 |
| Popis: |
The principal objective of this study was determination of the response of a laboratory-scale vapor-phase flow-direction-switching biofilter to loading changes associated with normal operations such as lunch breaks, overnight shutdowns, and single-shift operation of commercial and industrial facilities. Three regular transient loading cases were considered: (a) variable flow-reversal interval lenghts, (b) variable feed-on/off interval lengths, and (c) variable inlet concentration during a repeating feed-on/off cycle. Toluene was used as the model contaminant compound. The most significant findings of the study were: (1) Relative to unidirectional mode of operation, periodic flow reversal produced a more uniform distribution of reaction capacity along the length of the packed bed; (2) a 12 h flow reversal interval was sufficiently short to maintain the toluene-degrading microbial community in a near-fully active state throughout the unit whereas a 2 day flow reversal interval resulted in diminished removal rates in the first half of the bed and (3) Increasing off-period length resulted in greater penetration of contaminant into the bed and more uniform removal rates along the length of the bed. Information developed in this study should provide a more complete basis for establishing operating protocols and monitoring regulations for vapor-phase biofiltration systems. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
