- About
-
The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 51 to 60 of 1288 (0.096 seconds)Spelling suggestions: "subject:"biodegradation"" "subject:"diodegradation""
| 51 |
The kinetics of endogenous decay, death and lysis for viable organic solids.Devkota, Laxman Mani January 1989 (has links)
The long-term kinetic rates of solubilization/utilization of proteins, carbohydrates, and lipids in secondary solids from three municipal wastewater treatment plants were measured. Temperature, input sludge retention time (SRT₀), and terminal electron acceptor were used as control variables for two four-month digestion studies employing seven mixed batch reactors. Three types of adenosine triphosphate (ATP) measurements were used to differentiate between viable endogenous biomass, viable anaerobic/facultative biomass and intact non-viable solids. Solids solubilization was significantly affected by all three control variables. Temperature and terminal electron acceptor showed greater effects on solubilization than SRT₀. The effect of temperature was time-dependent and differed for the two types of secondary solids evaluated. Proteins were removed to the greatest extent, lipids to an extent comparable to that of volatile suspended solids (VSS), and carbohydrates were the most resistant component. Direct sample ATP or VSS measurements were poor indicators of the time-dependent potential of mixed microbial population for further waste stabilization. However, the analysis of the ratios of recovery ATP to sample ATP (ATP recovery ratio) provided more insights into the microbial behavior during sludge digestion. Under aerobic conditions, ATP recovery ratios generally increased with time. This result implied that during the initial phase of digestion the volatile solids consisted of a higher fraction of intact non-viable material, but after prolonged digestion the solids included a greater fraction of viable endogenous biomass. Under anaerobic conditions, ATP recovery ratios increased and then decreased with time, implying that the fermentative microbial fraction was highest at some intermediate point in the time frame employed. Four phase degradation patterns were observed in all cases, indicating an inability for any single equation to effectively model the long-term solubilization process.
|
| 52 |
Microbial degradation : A method for reducing the amount of oil in leachate from railway ballastHolcroft, J. D. January 1988 (has links)
No description available.
|
| 53 |
Development of solid support systems for the degradation of surfactantsThomas, O. R. T. January 1987 (has links)
No description available.
|
| 54 |
Degradation of lignin in forest leaf litter - with special reference to the isolation and properties of a strain of Penicillium thomiiLund-Beck, Christine January 1988 (has links)
No description available.
|
| 55 |
Biodegradation of synthetic 2-stroke lubricants in soilHaigh, Susan D. January 1989 (has links)
No description available.
|
| 56 |
The biodegradation of lignin and related aromatic compounds by basidiomycete fungiDurrant, Alastair J. January 1989 (has links)
No description available.
|
| 57 |
Phenols in petroleum systemsLucach, Sandra Ortega January 2003 (has links)
No description available.
|
| 58 |
The metabolism of methoxy- and ethoxyethanol and of methanol and acetate by facultative methylotrophsNarbad, Arjan January 1989 (has links)
No description available.
|
| 59 |
Genetic and biochemical studies of microbial degradation of thiophenesEvans, Janet Sylvia January 1989 (has links)
No description available.
|
| 60 |
Survival, movement and activity on soil of pesticide-degrading bacterial inoculantsSmith, Paul Philip January 1990 (has links)
No description available.
|
Page generated in 0.1025 seconds