The Carbon Isotope Biogeochemistry of Methane Production in Anoxic Sediments: 2. A Laboratory Experiment

1993 ◽  
pp. 594-605
Author(s):  
Marc J. Alperin ◽  
Neal E. Blair ◽  
Daniel B. Albert ◽  
Tori M. Hoehler
Keyword(s):  
Laboratory Experiment ◽  
Carbon Isotope ◽  
Methane Production ◽  
Anoxic Sediments

CARBON ISOTOPE EFFECTS IN METHANE PRODUCTION BY THERMAL CRACKING

1970 ◽  
pp. 37-53 ◽  
Author(s):  
WILLIAM M. SACKETT ◽  
SONGCHAI NAKAPARKSIN ◽  
DONALD DALRYMPLE
Keyword(s):  
Carbon Isotope ◽  
Methane Production ◽  
Isotope Effects ◽  
Thermal Cracking

scholarly journals Use of biogas biscuit meal EKPO-EB for agricultural biogas plant for substitution of energy crops utilization with organic waste

2015 ◽  
Vol 17 (3) ◽  
pp. 40-46
Author(s):  
Kateřina Chamrádová ◽  
Jiří Rusín
Keyword(s):  
Anaerobic Digestion ◽  
Laboratory Experiment ◽  
Methane Production ◽  
Organic Waste ◽  
Dry Mass ◽  
Corn Silage ◽  
Biogas Plant ◽  
High Yield ◽  
Two Stage ◽  
Second Stage

Abstract A laboratory experiment of two-stage mesophilic, low-dry mass, anaerobic digestion was carried out, focused on verifying the benefit of processing the biscuit meal EKPO-EB instead of triticale silage Agostino (GPS) and corn silage LG3266 in a regular batch for the agricultural biogas station in Pustějov. While anaerobic digestion of ensilages is largely difficult due to the content of lignocellulose, biscuit meal provides a high yield of biogas or methane, respectively, thanks to its high content of simple saccharides and lipids. When the original GPS (or the replacement EKPO-EB, respectively) represented 0.81% of weight of the daily input mixture dose for the first stage, the rise in volumetric methane production was 20% which is significant. The biscuit meal EKPO-EB decomposes almost completely in the first stage. Later, when the EKPO-EB represented 1.63% of weight of the daily input mixture dose for the first stage, the rise in volumetric methane production was 54% in the first stage and 16% in the second stage.

scholarly journals Mobility of contaminants in relation to dredging operations in a mesotidal estuary (Tagus estuary, Portugal)

1998 ◽  
Vol 37 (6-7) ◽  
pp. 25-31 ◽  
Author(s):  
Carlos Vale ◽  
Ana M. Ferreira ◽  
Cristina Micaelo ◽  
Miguel Caetano ◽  
Eduarda Pereira ◽  
...  
Keyword(s):  
Laboratory Experiment ◽  
Suspended Sediments ◽  
Distribution Coefficients ◽  
Laboratory Simulation ◽  
Tagus Estuary ◽  
Anoxic Sediments ◽  
Water Turbidity ◽  
Pcb Congeners ◽  
Short Period ◽  
Calculated Distribution

During the construction of a New Bridge over the Tagus estuary 2.5 million tons of sediments were dredged, part of this quantity being contaminated material. The extension and intensity of the water turbidity associated with dredging operating varied with the tidal conditions but the resuspended material collected near the bucket dredger did not present a concentration increment in metals and PCB, when compared to the estuarine suspended sediments. The calculated distribution coefficients suggest that some contaminants in solids near the dredger were not in equilibrium with the water. A 24-hour laboratory experiment demonstrated the complexity and quickness of anoxic sediments oxidation. In such a short period of time metals in the solids change their fractionation. A second laboratory simulation showed that mussels accumulate metals and PCB congeners when placed in turbid aerated water.

Metabolic analysis of efficient methane production from food waste with ethanol pre-fermentation using carbon isotope labeling

2019 ◽  
Vol 291 ◽  
pp. 121849 ◽  
Author(s):  
Hui Zou ◽  
Ming Gao ◽  
Qunhui Wang ◽  
Wenyu Zhang ◽  
Chuanfu Wu ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Food Waste ◽  
Methane Production ◽  
Isotope Labeling ◽  
Metabolic Analysis

Carbon isotope study of methane production in a town gas storage reservoir

Fuel ◽  
1994 ◽  
Vol 73 (5) ◽  
pp. 747-752 ◽  
Author(s):  
F BUZEK ◽  
V ONDERKA ◽  
P VANCURA ◽  
I WOLF
Keyword(s):  
Carbon Isotope ◽  
Methane Production ◽  
Gas Storage ◽  
Storage Reservoir ◽  
Isotope Study

scholarly journals Evidence for the Existence of Psychrophilic Methanogenic Communities in Anoxic Sediments of Deep Lakes

2003 ◽  
Vol 69 (3) ◽  
pp. 1832-1835 ◽  
Author(s):  
Alla N. Nozhevnikova ◽  
Kornelia Zepp ◽  
Francisco Vazquez ◽  
Alexander J. B. Zehnder ◽  
Christof Holliger
Keyword(s):  
Low Temperature ◽  
Methane Production ◽  
Deep Lakes ◽  
Production Rates ◽  
Anoxic Sediments

ABSTRACT In order to obtain evidence for the existence of psychrophilic methanogenic communities in sediments of deep lakes that are low-temperature environments (4 to 5°C), slurries were first incubated at temperatures between 4 and 60°C for several weeks, at which time they were amended, or not, with an additional substrate, such as cellulose, butyrate, propionate, acetate, or hydrogen, and further incubated at 6°C. Initial methane production rates were highest in slurries preincubated at temperatures between 4 and 15°C, with maximal rates in slurries kept at 6°C. Hydrogen-amended cultures were the only exceptions, with the highest methane production rates at 6°C after preincubation at 30°C.

Susceptibility of Angoff Method to Judgmental Errors: A Laboratory Experiment

2006 ◽  
Author(s):  
Daren S. Protolipac ◽  
Lisa Finkelstein ◽  
John Kulas
Keyword(s):  
Laboratory Experiment ◽  
Angoff Method
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