Release of dissolved organic carbon and nitrogen from forest floors in relation to solid phase properties, respiration and N-mineralization

1999 ◽  
Vol 162 (6) ◽  
pp. 645-652 ◽  
Author(s):  
Kerstin Michel ◽  
Egbert Matzner
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
N Mineralization ◽  
Solid Phase ◽  
Carbon And Nitrogen ◽  
Forest Floors ◽  
Phase Properties

Dissolved organic carbon and nitrogen in the Western Black Sea

2007 ◽  
Vol 105 (1-2) ◽  
pp. 140-150 ◽  
Author(s):  
Hugh W. Ducklow ◽  
Dennis A. Hansell ◽  
Jessica A. Morgan
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Black Sea ◽  
Carbon And Nitrogen

Examination on Influence Caused by Air Injection Manners Changing in Aerobic-Anaerobic Landfill Method

2015 ◽  
Vol 768 ◽  
pp. 310-317
Author(s):  
Gang Zhen Jiao ◽  
Lei Zhang ◽  
Xiong Shi ◽  
Gui Fu
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Organic Carbon ◽  
Simulation Model ◽  
Solid Phase ◽  
Landfill Gas ◽  
Air Injection ◽  
Carbon And Nitrogen ◽  
Speed Up ◽  
Leachate Quality

In this study, aerobic-anaerobic landfill method (AANM) is focused on as a new way to speed up landfill stabilization, inhibit landfill gas flux, and ameliorate on leachate quality. Numerical simulation model is developed to guide the air injection craftwork and study its effect on achieving above goals. On basis of work finished in last period (0~310 days), air was injected into Lysimeters A (Lys.A) at 0.5 m, and at 2.5 m in Lys.B with the same rate of 1 L/min. In Lys.C there is no air injected. In order to interview the influence by air injection manners changing, from 310 days till 360 days, air injection manners are changed from Mono-site into Double-site in Lys.A and in Lys. B it will be changed from bottom-site (2.5m) into middle-site (1.5m). In Lys.C there will be no changing. By interviewing the comparisons on simulated results in 50 days with and without air injection manners changing, it was found that air injection manners changing in Lys.A causes TOC discharging amount increase more than 6 times, but T-N and GHE resulted from landfill gas decrease 24.1% and 71 % respectively. Air injection manners changing in Lys.B resulted in discharged TOC and T-N increase 108.1 % and 53.5 % respectively, while T-N decreases 3.7 %. On basis of mechanism assumption, mathematical model was developed and according to the simulated results for 5 years, air injected at 2.5 m achieved improvements on stabilization of solid phase organic carbon and nitrogen for 34 % and 13 %, amelioration on leachate quality for 35 % and 62 % of TOC and T-N, and the restraint of GHE for 14 times compared with no air injection case.

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