The rotary trickle-red reactor - A new reactor concept for biological gas purification

Citation
S. Gai et al., The rotary trickle-red reactor - A new reactor concept for biological gas purification, CHEM ENG TE, 24(7), 2001, pp. 5-14
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemical Engineering
Journal title
CHEMICAL ENGINEERING & TECHNOLOGY
ISSN journal
0930-7516 → ACNP
Volume
24
Issue
7
Year of publication
2001
Pages
5 - 14
Database
ISI
SICI code
0930-7516(200107)24:7<5:TRTR-A>2.0.ZU;2-#
Abstract
A new type of reactor employed to the biological gas purification is presen ted. The avoidance of clogging in the carrier packing is achieved by i) the use of a structured, rotating carrier packing, ii) a definite liquid irrig ation regime during start-up, operation and clean-up time phases, iii) an o n-line determination and control of the fixed biofilm mass. A uniform biofi lm thickness is generated by an optimized liquid irrigation of the carrier packing with spray nozzles. The detachment of the fixed biomass is accompli shed by liquid shear forces generated with jet nozzles. The time-scheduled operation regime of the reactor is founded on the on-line quantification of the immobilized biomass, which results in a new quality of process governi ng of biotrickling reactors applied to gas purification. This is proved by the experimental results of pressure drop, dynamic liquid holdup as well as the volumetric degradation rates. The degradation of styrene was investiga ted in laboratory and field experiments showing a maximal volumetric degrad ation rate of 150 g m(-3) h(-1) at a pollutant load of 200 g m(-3) h(-1). T he feasibility of this reactor prototype is demonstrated by employing it to the elimination of industrial waste gas.