Porous inorganic support spheres which can be cleaned of surface

Details Porous inorganic support spheres which can be cleaned of surface Porous inorganic support spheres which can be cleaned of surface

1987-11-16

1991-01-22

Naff, David M.

Chemistry: molecular biology and microbiology

Micro-organism, tissue cell culture or enzyme using process...

435170, 435171, 435176, 43524024, 435240243, 4352521, 435262, 435801, 435813, C12P 100, C12N 1114, C12N 502

Patent

active

049870688

ABSTRACT:
Microorganisms or animal cells are cultured in a fluidized or fixed bed bioreactor on porous inorganic sintered support spheres containing inwardly continuous and outwardly open pores. The spheres have a density and diameter such that shear forces created under fluidized bed conditions shear off microorganisms or animal cells grown out of the pores and on the surface of the spheres. Culturing may be carried out in a fixed bed continuous reactor and the bed subjected to intermittent fluidized bed conditions to shear microorganisms or animal cells off the sphere surfaces. The spheres may be coated with a thin plastic layer to increase resistance to abrasion. Also, the spheres may be provided with a surface layer of inorganic and/or organic material for improving immobilization of microorganisms or animal cells. The spheres can be used in degradation of municipal sewage and industrial wastes and for bioengineering production of nutritionally essential and pharmacological substances and other fermentation products.

REFERENCES:
patent: 4153510 (1979-05-01), Messing et al.
patent: 4321141 (1982-03-01), Messing
patent: 4352884 (1982-10-01), Nakashima
patent: 4588540 (1986-05-01), Kiefer et al.
Durand et al., Process Biochemistry, 1978 (Sep.), pp. 14-23.
Atkinson et al., Trans. Insta Chem. Engrs, vol. 50, 1972 (pp. 208-216).
Atkinson et al., Biotechnology and Bioengineering, vol. XXI, 1979, pp. 193-199.
Gbewanyo et al., Advances in Biotechnology, vol. 1, Pergamon Press, 1981, pp. 609-614.
"Sol-Gel Glasses and their Future Applications", S. Sakka, Transact. Ind. Ceramic Soc. 46, 1 (1987).

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