ISSN:
1476-5535
Keywords:
Keywords: slime production; Bacillus alvei; Aerobacter aerogenes; coated broke; white water; biocide (Bioplus®; levanase
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Bacteria, yeast and filamentous fungi were isolated from various sites within a paper mill. Bacillus alvei and Aerobacter aerogenes were the most prevalent contaminating bacteria. Maximum slime was produced by A. aerogenes (4.2 mg ml−1) at pH 6.5 and by B. alvei (7.2 mg ml−1) at pH 7.5 in white water. The optimum temperature was 40°C for maximum slime production by both organisms. In the presence of levanase, a 25% reduction in dosages of a biocide (Bioplus®) was observed. Killing of A. aerogenes, which was achieved in 8 h with 20 ppm Bioplus®, could be obtained in 6 h with the combined use of levanase and a lower concentration of Bioplus® (15 ppm). With B. alvei almost the same inhibitory effect (4.22-log decrease) was obtained at 20 ppm Bioplus®, and in combination with a lower concentration of Bioplus® (15 ppm) and enzyme. The paper properties did not show any adverse effect after treatment with levanase and Bioplus®.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/sj.jim.2900393
Permalink
