Abstract：
:Alcaligenes sp. A 7-2 immobilized on granular clay has been applied in a percolator to degrade 4-chlorophenol in sandy soil. Good adsorption rates on granular clay were achieved using cell suspensions with high titres and media at pH 8.0. The influence of various parameters such as aeration rate, pH, temperature, concentration of 4-chlorophenol and size of inoculum on the degradation rate were investigated. During fed-batch fermentations under optimal culture conditions, concentrations of 4-chlorophenol up to 160 mg.l-1 could be degraded. Semicontinuous culture experiments demonstrated that the degradation potential in soil could be well established and enhanced by the addition of immobilized bacteria. Continuous fermentation was performed with varying 4-chlorophenol concentrations in the feed and different input levels. The maximum degradation rate was 1.64 g.l-1.day-1.
journal_name
Appl Microbiol Biotechnoljournal_title
Applied microbiology and biotechnologyauthors
Balfanz J,Rehm HJdoi
10.1007/BF00169634subject
Has Abstractpub_date
1991-08-01 00:00:00pages
662-8issue
5eissn
0175-7598issn
1432-0614journal_volume
35pub_type
杂志文章abstract：:L-cysteine, a valuable sulfur-containing amino acid, has been widely used in food, agriculture, and pharmaceutical industries. Due to the toxicity and complex regulation of L-cysteine, no efficient cell factory has yet been achieved for L-cysteine industrial production. In this study, the food-grade microorganism Cory...
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