1996
DOI: 10.1007/bf00129727
|View full text |Cite
|
Sign up to set email alerts
|

Degradation of dimethylamine salt of 2,4-dichlorophenoxyacetate by a mixed bacterial culture in stirred tank reactors

Abstract: An aerated microbiological process was tested in 1.5-1 stirred tank reactors for the treatment of dimethylamine salt of 2,4-dichlorophenoxyacetate (2,4-D). A mixed culture was used with the concentration range of 54 to 216 mg 2,4-D/t. The highest concentration was completely depleted within 6 to 8 days of contact time. 2,4-Dichlorophenol, the first intermediate of the degradative pathway, accumulated transiently in the growth medium.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2

Citation Types

1
1
0

Year Published

1999
1999
2012
2012

Publication Types

Select...
3

Relationship

0
3

Authors

Journals

citations
Cited by 3 publications
(2 citation statements)
references
References 10 publications
1
1
0
Order By: Relevance
“…But these investigations, carried out with a Pseudomonas cepuciu strain, were aimed at the effects of succinate as a secondary carbon source on the biodegradation of 2,4-D. Similar results concerning a transient accumulation of 2,4-dichlorophenol were also obtained during batch degradation of about 0.2 g/l of 2,4-D by a mixed bacterial culture [26]. The decreased degradation efficiency observed after several months of operation of this PU-bubble reactor could be explained by the ageing of the system owing to the high density of cells of Sphingomonas herbicidovoruns MH on the carrier, already known from continuous chloroaniline degradation [ 181 as well as from 2,4,6-tichlorophenol degradation, the latter using a polycaproamide fibre as a carrier [15].…”
Section: Oiscussionsupporting
confidence: 48%
“…But these investigations, carried out with a Pseudomonas cepuciu strain, were aimed at the effects of succinate as a secondary carbon source on the biodegradation of 2,4-D. Similar results concerning a transient accumulation of 2,4-dichlorophenol were also obtained during batch degradation of about 0.2 g/l of 2,4-D by a mixed bacterial culture [26]. The decreased degradation efficiency observed after several months of operation of this PU-bubble reactor could be explained by the ageing of the system owing to the high density of cells of Sphingomonas herbicidovoruns MH on the carrier, already known from continuous chloroaniline degradation [ 181 as well as from 2,4,6-tichlorophenol degradation, the latter using a polycaproamide fibre as a carrier [15].…”
Section: Oiscussionsupporting
confidence: 48%
“…A bacteriostatic effect of 2,4‐DCP results from dissipating the pH gradient across the cytoplasmic membrane and causing efflux of small molecules such as ATP (Heipieper et al ., 1991). Toxicity effects of 2,4‐DCP were also observed in stirred tank reactors for microbiological treatment of 2,4‐D‐contaminated waste waters (Oh and Cha, 1996), and in 2,4‐D‐amended soils (Short et al ., 1991). Apparently, during the transition phase, 2,4‐DCP was produced faster than it became degraded and became toxic at levels higher than 0.3 mM (in the reactor medium).…”
Section: Discussionmentioning
confidence: 98%