ISSN:
0268-2575
Keywords:
bioprocessing
;
clean technology
;
commercial process
;
dehalogenation
;
wet-strength resins
;
Chemistry
;
Biochemistry and Biotechnology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Process Engineering, Biotechnology, Nutrition Technology
Notes:
---The modification of existing chemical manufacturing processes to selectively remove unwanted chemicals in products, offers a realistic approach to novel clean technologies. Adjunct biotechnological processing offers a means to achieve the manufacture of new environmentally enhanced products (EEPs). This paper describes the development and implementation of a bioprocess for the manufacture of an enhanced paper chemical. The process was integrated into existing manufacturing plants involved in the production of neutral curing poly(aminoamide) chemicals which are used commercially to impart wet-strength to paper products such as tissues and towels (e.g. Kymene™ wet-strength resins). A consequence of the epichlorohydrin chemistry involved in the polymer's manufacture, haloalcohols (predominantly, 1,3-dichloropropan-2-ol (DCP) and 1-chloropropanediol (3-CPD)) contaminate the product. The objective was to reduce the concentration of the two haloalcohols in Kymene™-SLX wet-strength resins (c. 8000 ppm db) without affecting the performance of the product. A two-membered bacterial consortium was used in an aerobic stirred tank bioreactor system which was capable of rapidly reducing the concentrations of DCP and CPD in an aqueous solution of the wet-strength resin to less than 1 ppm and 5 ppm respectively. A 3000 dm3 bioreactor was integrated into two established manufacturing plants, generating a reliable and predictable process to enhance the value of the neutral curing wet-strength chemical. ©1997 SCI
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
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