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1. Exploring multiple operating scenarios to identify low-cost, high nitrate removal strategies for electrically-stimulated woodchip bioreactors

Author:
Law, J.Y.,   et al.   ; Soupir, M.L.; Raman, D.R.; Moorman, T.B.;     Show all 4 Authors
Source:
Ecological engineering 2018 v.120 pp. 146-153
ISSN:
0925-8574
Subject:
best management practices; bioreactors; denitrification; electrical treatment; models; nitrate nitrogen; nitrates; pollution control; surface water; tile drainage; water pollution; wood chips; Iowa
Abstract:
... Woodchip bioreactors are recognized as an effective best management practice in the Iowa Nutrient Reduction Strategy. This edge-of-field practice intercepts and removes NO3-N, thereby reducing the NO3-N concentration in tile drainage before being discharged into surface water. Actual NO3-N load reductions realized by woodchip bioreactors are impacted by bioreactor size, hydraulic retention time (H ...
Handle:
10113/6363795
DOI:
10.1016/j.ecoleng.2018.05.001

2. Impact of temperature and hydraulic retention time on pathogen and nutrient removal in woodchip bioreactors

Author:
Law, J.Y.,   et al.   ; Soupir, M.L.; Hoover, N.L.; Moorman, T.B.; Bearson, B.L.;     Show all 5 Authors
Source:
Ecological engineering 2018 v.112 pp. 153-157
ISSN:
0925-8574
Subject:
Escherichia coli; Salmonella; bioreactors; denitrification; drainage; intestinal microorganisms; microbial contamination; nitrate nitrogen; nitrates; pathogens; phosphorus; pollutants; preferential flow; systems engineering; temperature; wood chips
Abstract:
... Woodchip denitrification bioreactors are an important edge-of-field practice for treating agricultural drainage; however, their ability to filter microbial pollutants has primarily been explored in the context of wastewater treatment. Upflow column reactors were constructed and tested for E. coli, Salmonella, NO3-N, and dissolved reactive phosphorus (DRP) at hydraulic retention times (HRTs) of 12 ...
Handle:
10113/5937024
DOI:
10.1016/j.ecoleng.2017.12.005

3. Electrical stimulation for enhanced denitrification in woodchip bioreactors: Opportunities and challenges

Author:
Law, J.Y.,   et al.   ; Soupir, M.L.; Raman, D.R.; Moorman, T.B.; Ong, S.K.;     Show all 5 Authors
Source:
Ecological engineering 2018 v.110 pp. 38-47
ISSN:
0925-8574
Subject:
anodes; bioreactors; capital; cathodes; cost effectiveness; denitrification; denitrifying microorganisms; drainage; electrical treatment; graphene; groundwater; nitrates; stainless steel; water pollution; water temperature; wood chips
Abstract:
... Woodchip bioreactors are being implemented for the removal of nitrates in groundwater and tile water drainage. However, low nitrate removals in denitrifying woodchip bioreactors have been observed for short hydraulic retention time (HRT) and low water temperature (<10°C). One potential approach to improve woodchip bioreactor performance is to provide an alternative and readily available electron s ...
Handle:
10113/5842072
DOI:
10.1016/j.ecoleng.2017.10.002

4. VO2/Si–Al gel nanocomposite thermochromic smart foils: Largely enhanced luminous transmittance and solar modulation

Author:
Law, J.Y.,   et al.   ; Liu, C.; Cao, X.; Kamyshny, A.; Magdassi, S.; Long, Y.;     Show all 6 Authors
Source:
Journal of colloid and interface science 2014 v.427 pp. 49-53
ISSN:
0021-9797
Subject:
foil; gels; nanocomposites; nanoparticles; nanopores; transmittance
Abstract:
... VO2 nanoparticles with a dimension of approximately 20nm were obtained by simple mechanical bead-milling method, which were well dispersed in transparent silica–alumina (Si–Al) gel matrix to form nanocomposites. The VO2/Si–Al gel thermochromic nanocomposite foils were fabricated with various VO2 solid contents and foil thickness. With 10% VO2 loading and 3μm foil thickness, high luminous transmitt ...
DOI:
10.1016/j.jcis.2013.11.028