scholarly journals Laboratory and Pilot Scale Evaluation of a Permeable Reactive Barrier Technology for Use at Rocky Flats Environmental Technology Site (RFETS)

10.2172/3585 ◽  
1999 ◽  
Author(s):  
B.P. Dwyer ◽  
M.G. Hankins
Keyword(s):  
Pilot Scale ◽  
Permeable Reactive Barrier ◽  
Environmental Technology ◽  
Scale Evaluation ◽  
Rocky Flats ◽  
Reactive Barrier

scholarly journals Pilot-Scale Evaluation of a Permeable Reactive Barrier with Compost and Brown Coal to Treat Groundwater Contaminated with Trichloroethylene

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1922 ◽  
Author(s):  
S. Johana Grajales-Mesa ◽  
Grzegorz Malina
Keyword(s):  
Brown Coal ◽  
Reductive Dechlorination ◽  
Experimental Period ◽  
Pilot Scale ◽  
Permeable Reactive Barrier ◽  
Residence Times ◽  
Contaminated Aquifer ◽  
Scale Evaluation ◽  
Mixing Ratios ◽  
Reactive Barrier

This study evaluates, under field conditions, the efficiency of a permeable reactive barrier (PRB) with compost and brown coal to remove trichloroethylene (TCE) (109 µg/L) from contaminated groundwater. Three stainless steel boxes (1.2 × 0.5 × 0.5 m) with the brown coal-compost mixture at three different mixing ratios of 1:1, 1:3, and 1:5 (by volume) were installed to simulate the PRB. Groundwater from the TCE-contaminated aquifer was pumped into the system at a flow rate of 3.6 L/h. Residence times in the boxes were of: 25, 20, 10 h, respectively. Effluent samples were analyzed for TCE and its daughter products: dichloroethylene (DCE), vinyl chloride (VC) and ethane. During the 198-day experimental period TCE concentrations in groundwater decreased below ≤1.1 µg/L, i.e., much lower than groundwater and drinking water standards in Poland. After 16 days cis-1,2-DCE was monitored indicating possible reductive dechlorination of TCE. However, complete transformation of TCE into non-toxic byproducts was not evidenced during the time of experiments, indicating that reductive dechlorination slowed down or stopped at DCE, and that the designed residence times were not long enough to allow the complete dechlorination process.

Ammonium removal from groundwater using a zeolite permeable reactive barrier: a pilot-scale demonstration

2014 ◽  
Vol 70 (9) ◽  
pp. 1540-1547 ◽  
Author(s):  
Shengpin Li ◽  
Guoxin Huang ◽  
Xiangke Kong ◽  
Yingzhao Yang ◽  
Fei Liu ◽  
...  
Keyword(s):  
Sustainable Use ◽  
Pilot Scale ◽  
Field Application ◽  
Permeable Reactive Barrier ◽  
Capacity Limits ◽  
Term Operation ◽  
Reactive Barrier ◽  
N Removal

In situ remediation of ammonium-contaminated groundwater is possible through a zeolite permeable reactive barrier (PRB); however, zeolite's finite sorption capacity limits the long-term field application of PRBs. In this paper, a pilot-scale PRB was designed to achieve sustainable use of zeolite in removing ammonium (NH4+-N) through sequential nitrification, adsorption, and denitrification. An oxygen-releasing compound was added to ensure aerobic conditions in the upper layers of the PRB where NH4+-N was microbially oxidized to nitrate. Any remaining NH4+-N was removed abiotically in the zeolite layer. Under lower redox conditions, nitrate formed during nitrification was removed by denitrifying bacteria colonizing the zeolite. During the long-term operation (328 days), more than 90% of NH4+-N was consistently removed, and approximately 40% of the influent NH4+-N was oxidized to nitrate. As much as 60% of the nitrate formed in the PRB was reduced in the zeolite layer after 300 days of operation. Removal of NH4+-N from groundwater using a zeolite PRB through bacterial nitrification and abiotic adsorption is a promising approach. The zeolite PRB has the advantage of achieving sustainable use of zeolite and immediate NH4+-N removal.

Pilot-scale Evaluation of AirPrex® for Digestate Treatment

2017 ◽  
Vol 2017 (1) ◽  
pp. 119-138
Author(s):  
Blair Wisdom ◽  
Brad Van Anderson ◽  
Isaac Avila ◽  
Troy Gottschalk ◽  
Kurt Carson ◽  
...  
Keyword(s):  
Pilot Scale ◽  
Scale Evaluation

scholarly journals Evaluation of the Efficiency of a Clay Permeable Reactive Barrier for the Remediation of Groundwater Contaminated with 137Cs

2017 ◽  
Vol 17 ◽  
pp. 444-447 ◽  
Author(s):  
Elena Torres ◽  
Paloma Gómez ◽  
Antonio Garralón ◽  
Belén Buil ◽  
María J. Turrero ◽  
...  
Keyword(s):  
Permeable Reactive Barrier ◽  
Reactive Barrier
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