scholarly journals A laboratory simulation of in situ leachate treatment in semi-aerobic bioreactor landfill

Water SA ◽  
2018 ◽  
Vol 34 (1) ◽  
pp. 133 ◽  
Author(s):  
Shou-liang Huo ◽  
Bei-dou Xi ◽  
Hai-chan Yu ◽  
Shi-lei Fan ◽  
Su Jing ◽  
...  
Keyword(s):  
Laboratory Simulation ◽  
Bioreactor Landfill ◽  
Leachate Treatment

MSW stabilization in an anaerobic bioreactor landfill and evaluation of in-situ leachate treatment potential with the help of quadric model

2021 ◽  
Vol 23 (6) ◽  
pp. 2192-2207
Author(s):  
Anil Nain ◽  
Rajesh Kumar Lohchab ◽  
Kulbir Singh ◽  
Mikhlesh Kumari ◽  
Jitender Kumar Saini
Keyword(s):  
Bioreactor Landfill ◽  
Leachate Treatment ◽  
Anaerobic Bioreactor

scholarly journals Feasibility study of in-situ bioremediation for nitrobenzene-contaminated groundwater

2017 ◽  
Vol 17 (4) ◽  
pp. 1160-1167 ◽  
Author(s):  
Na Liu ◽  
Yue Wang ◽  
Yonglei An ◽  
Feng Ding ◽  
Xiaolong Yu ◽  
...  
Keyword(s):  
Simulation Experiment ◽  
Laboratory Simulation ◽  
Contaminated Groundwater ◽  
Site Conditions ◽  
In Situ Bioremediation ◽  
Degrading Bacterium ◽  
Bacterium Strain ◽  
Negative Factors ◽  
Sufficient Oxygen

Although many studies have simulated in-situ bioremediation of contaminated groundwater, most of them have not considered hydrochemical conditions and indigenous microorganisms, thus potentially rendering results inapplicable to actual in-situ groundwater bioremediation projects. This study focused on a nitrobenzene-contaminated groundwater site located in Jilin City, China. The actual nitrobenzene-contaminated groundwater was taken from Jilin City to simulate in-situ groundwater bioremediation in the laboratory. The feasibility of in-situ bioremediation for nitrobenzene-contaminated groundwater was studied according to actual site conditions and characteristics of nitrobenzene-degrading microorganisms in groundwater. The results showed that nitrobenzene-degrading bacterium strain NB1 was the dominant species that could effectively and rapidly degrade nitrobenzene by a partial reductive pathway. No negative factors on the growth or degrading function of this strain in groundwater could be detected. During a laboratory simulation experiment, combined in-situ bioremediation technologies, namely air sparging and bioaugmentation, could readily remove approximately 89.56% of nitrobenzene from groundwater without adding nutrients; oxygen was found to be the important growth factor for strain NB1. As the substrate of nitroreductase, encoded by the nitrobenzene nitroreductase (nbzA) gene, nitrobenzene was likely to significantly affect the expression of this gene. In conclusion, in-situ bioremediation is a feasible way to solve the problem of nitrobenzene-contaminated groundwater in Jilin City as long as sufficient oxygen and biomass of strain NB1 is ensured.

Optimizing Preloading Pressure of Precharged Gas for Isobaric Gas-Tight Hydrothermal Samplers

2018 ◽  
Vol 140 (2) ◽  
Author(s):  
Haocai Huang ◽  
Liang Huang ◽  
Wei Ye ◽  
Shijun Wu ◽  
Canjun Yang ◽  
...  
Keyword(s):  
Volume Change ◽  
Theoretical Models ◽  
Sample Volume ◽  
Field Application ◽  
Laboratory Simulation ◽  
Application Process ◽  
Sampling Depth ◽  
Ambient Temperatures ◽  
Gas Tight

Isobaric gas-tight hydrothermal samplers, with the ability to maintain pressure, can be used to keep in situ chemical and biological sample properties stable. The preloading pressure of the precharged gas is a major concern for isobaric gas-tight hydrothermal samplers, especially when the samplers are used at different sampling depths, where the in situ pressures and ambient temperatures vary greatly. The most commonly adopted solution is to set the preloading pressure for gas-tight samplers as 10% of the hydrostatic pressure at the sampling depth, which might emphasize too much on pressure retention; thereby, the sample volume may be unnecessarily reduced. The pressure transition of the precharged gas was analyzed theoretically and modeled at each sampling stage of the entire field application process. Additionally, theoretical models were built to represent the pressure and volume of hydrothermal fluid samples as a function of the preloading pressure of the precharged gas. Further, laboratory simulation and examination approaches were also adopted and compared, in order to obtain the volume change of the sample and accumulator chambers. By using theoretical models and the volume change of the two chambers, the optimized preloading pressure for the precharged gas was obtained. Under the optimized preloading pressure, the in situ pressure of the fluid samples could be maintained, and their volume was maximized. The optimized preloading pressure obtained in this study should also be applicable to other isobaric gas-tight hydrothermal samplers, by adopting a similar approach to pressure maintenance.

scholarly journals Laboratory Simulation of In-situ Leaching of Polyhalite

2011 ◽  
Vol 2 ◽  
pp. 50-57 ◽  
Author(s):  
Xian-yin Zhao ◽  
Lian-ying An ◽  
Ning Liu ◽  
Hui-an Yin ◽  
Ming-lin Tang
Keyword(s):  
Laboratory Simulation

In situ mature leachate treatment with hydroxylamine addition in the Aerobic-Anaerobic Recirculation Landfill

2019 ◽  
Vol 696 ◽  
pp. 134084 ◽  
Author(s):  
Ying Yu ◽  
Mingxiao Li ◽  
Xin Dai ◽  
Fanhua Meng ◽  
Xuejiao Qi ◽  
...  
Keyword(s):  
Leachate Treatment

The impact of temperature and gas-phase oxygen on kinetics of in situ ammonia removal in bioreactor landfill leachate

2007 ◽  
Vol 41 (9) ◽  
pp. 1907-1914 ◽  
Author(s):  
Nicole D. Berge ◽  
Debra R. Reinhart ◽  
John D. Dietz ◽  
Tim Townsend
Keyword(s):  
Gas Phase ◽  
Landfill Leachate ◽  
Ammonia Removal ◽  
Bioreactor Landfill ◽  
The Impact ◽  
Kinetics Of

Effects of in situ nitrogen removal on degradation/stabilization of MSW in bioreactor landfill

2008 ◽  
Vol 99 (8) ◽  
pp. 2787-2794 ◽  
Author(s):  
Yan Long ◽  
Hui-min Lao ◽  
Li-fang Hu ◽  
Dong-Sheng Shen
Keyword(s):  
Nitrogen Removal ◽  
Bioreactor Landfill
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