| 摘要 |
<p>This invention provides compositions and gel support systems containing inclusions of alginate gels and bacteria encapsulated in silica gels. New gel preparations provide suitable void space for growth and maintenance of the active cells, overcoming the disadvantage of prior art silica gels. The gel compositions provide suitable conditions for survival and growth of active cells, are sufficiently stable under conditions of use in biofilters and are resistant to decomposition or biodegradation by entrapped cells. The gels do not dissolve in water. The constructs containing gel compositions of the invention can be formulated so that they can be packed into a bed. The silica portion of the gel can absorb contaminants to sufficient extent whilst exhibiting low oxygen diffusivity.</p> |
