Enhanced Biodegradation of Dicarboximide Fungicides in Soil

1990 ◽  
pp. 53-67 ◽  
Author(s):  
Allan Walker ◽  
Sarah J. Welch
Keyword(s):  
Enhanced Biodegradation

Rotation and Continuous use of Dietholate, Fonofos, and SC-0058 on EPTC Persistence in Soil

Weed Science ◽  
1990 ◽  
Vol 38 (2) ◽  
pp. 179-185
Author(s):  
Brent W. Bean ◽  
Fred W. Roeth ◽  
Alex R. Martin ◽  
Robert G. Wilson
Keyword(s):  
Weed Control ◽  
Inhibitory Influence ◽  
Laboratory Studies ◽  
Initial Development ◽  
Enhanced Biodegradation ◽  
Previously Treated ◽  
Repeated Use ◽  
Continuous Use ◽  
Biodegradation In Soil

Field and laboratory studies were conducted to examine the influence of continuous use and rotation of extenders on EPTC persistence in soils from Clay Center and Scottsbluff, NE. Rotation of EPTC + dietholate and EPTC + fonofos in soils with three prior annual treatments of each combination did not improve weed control compared to continuous use. SC-0058 was generally effective in slowing EPTC biodegradation in soils previously treated with EPTC, EPTC + dietholate, EPTC + fonofos, or EPTC + SC-0058. Dietholate was effective in slowing EPTC biodegradation in soil previously treated with EPTC or EPTC + SC-0058. SC-0058 appeared to have an inhibitory influence on the initial development of soil-enhanced EPTC biodegradation. Any enhanced biodegradation of dietholate or SC-0058 that may occur after repeated use was not a factor in enhanced EPTC degradation in EPTC + extender history soils.

Enhanced Biodegradation of Iopromide and Trimethoprim in Nitrifying Activated Sludge†

2006 ◽  
Vol 40 (23) ◽  
pp. 7367-7373 ◽  
Author(s):  
Angela L. Batt ◽  
Sungpyo Kim ◽  
Diana S. Aga
Keyword(s):  
Activated Sludge ◽  
Enhanced Biodegradation

Oxygen-Enhanced Biodegradation of Phenoxy Acids in Ground Water at Contaminated Sites

Ground Water ◽  
2006 ◽  
Vol 44 (2) ◽  
pp. 256-265 ◽  
Author(s):  
Nina Tuxen ◽  
Lotte A. Reitzel ◽  
Hans-Jorgen Albrechtsen ◽  
Poul L. Bjerg
Keyword(s):  
Ground Water ◽  
Contaminated Sites ◽  
Enhanced Biodegradation ◽  
Phenoxy Acids

Combined destruction of ethylene glycol, formaldehyde and methanol by biological methods

2021 ◽  
pp. 40-47
Author(s):  
М.Г. Зубов ◽  
Е.В. Вильсон ◽  
В.А. Литвиненко ◽  
А.А. Кадревич
Keyword(s):  
Ethylene Glycol ◽  
Pilot Plant ◽  
Treatment Plant ◽  
Ammonium Nitrogen ◽  
Design Parameters ◽  
Specific Rate ◽  
Toxic Substances ◽  
Multi Stage ◽  
Enhanced Biodegradation ◽  
Biological Methods

Целью прикладного научного исследования является определение удельной скорости окисления токсичных органических соединений – этиленгликоля, формальдегида и метанола – сообществом микроорганизмов иммобилизованного биоценоза на носителе ЁРШ®, установленном в пилотной установке. Для достижения поставленной цели реализован многоэтапный эксперимент, позволивший определить возможность глубокой биодеградации токсичных веществ и установить необходимую концентрацию азота аммонийного в исходной сточной воде для реализации процесса биодеградации. В ходе исследования были выполнены следующие работы: определение времени выхода на режим пилотной установки после плановой остановки в подаче сточных вод на 31-й день; оценка удельной скорости окисления прикрепленным биоценозом по показателям этиленгликоль, формальдегид, ХПК, БПК; оценка ассимиляции и трансформации соединений азота; формулирование выводов на основе проведенного анализа результатов исследований, необходимых для оценки целесообразности применения биологической очистки сточных вод прикрепленным биоценозом исследуемых загрязнителей и определения расчетных параметров очистного сооружения. The objective of the applied scientific research is to determine the specific rate of oxidation of toxic organic compounds – ethylene glycol, formaldehyde and methanol – by the community of microorganisms of the immobilized biocenosis on the IORSh carrier installed in a pilot plant. To achieve this goal, a multi-stage experiment was carried out that provided for determining possible enhanced biodegradation of toxic substances and specifying the required concentration of ammonium nitrogen in raw wastewater for the implementation of the biodegradation process. In the course of the study, the following works were carried out: determining the process stabilization time in the pilot plant after the scheduled shutdown in the wastewater supply on the 31stday; assessing the specific rate of oxidation by the attached biocenosis in terms of ethylene glycol, formaldehyde, COD, BOD; assessing the assimilation and transformation of nitrogen compounds; drawing conclusions based on the analysis of the research results required for estimating the feasibility of using biological wastewater treatment with the attached biocenosis of the pollutants under study and determining the design parameters of the treatment plant.

Enhanced Biodegradation of Herbicides in Soil and Effects on Weed Control

1987 ◽  
Vol 1 (4) ◽  
pp. 341-349 ◽  
Author(s):  
R. Gordon Harvey ◽  
J. H. Dekker ◽  
Richard S. Fawcett ◽  
Fred W. Roeth ◽  
Robert G. Wilson
Keyword(s):  
Weed Species ◽  
North Central ◽  
Herbicide Degradation ◽  
Proso Millet ◽  
The North ◽  
Central United States ◽  
Enhanced Biodegradation ◽  
Long Time ◽  
Previously Treated ◽  
Repeated Use

Research conducted since 1979 in the north central United States and southern Canada demonstrated that after repeated annual applications of the same thiocarbamate herbicide to the same field, control of some difficult-to-control weed species was reduced. Laboratory studies of herbicide degradation in soils from these fields indicated that these performance failures were due to more rapid or “enhanced” biodegradation of the thiocarbamate herbicides after repeated use with a shorter period during which effective herbicide levels remained in the soils. Weeds such as wild proso millet [Panicum miliaceumL. spp.ruderale(Kitagawa) Tzevelev. #3PANMI] and shattercane [Sorghum bicolor(L.) Moench. # SORVU] which germinate over long time periods were most likely to escape these herbicides after repeated use. Adding dietholate (O,O-diethylO-phenyl phosphorothioate) to EPTC (S-ethyl dipropyl carbamothioate) reduced problems caused by enhanced EPTC biodegradation in soils treated previously with EPTC alone but not in soils previously treated with EPTC plus dietholate. While previous use of other thiocarbamate herbicides frequently enhanced biodegradation of EPTC or butylate [S-ethyl bis(2-methylpropyl)carbamothioate], previous use of other classes of herbicides or the insecticide carbofuran (2,3 -dihydro-2,2 -dimethyl-7-benzofuranyl methylcarbamate) did not. Enhanced biodegradation of herbicides other than the thiocarbamates was not observed.

scholarly journals Enhanced Biodegradation of Chlorpyrifos by Agricultural Soil Isolate

2014 ◽  
Vol 26 (10) ◽  
pp. 3013-3017 ◽  
Author(s):  
Muhammad Farhan ◽  
Zahid Ali Butt ◽  
Amin U. Khan ◽  
Abdul Wahid ◽  
Maqsood Ahmad ◽  
...  
Keyword(s):  
Agricultural Soil ◽  
Soil Isolate ◽  
Enhanced Biodegradation
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