Improving the efficiency of wood chip bioreactors for removing nitrate from drainage water
| dc.contributor.author | Whyte, Katie Anne | |
| dc.contributor.examiningcommittee | Cicek, Nazim (Biosystems Engineering) Zvomuya, Francis (Soil Science) | en_US |
| dc.contributor.supervisor | Sri Ranjan, Ramanathan (Biosystems Engineering) | en_US |
| dc.date.accessioned | 2017-09-08T14:20:08Z | |
| dc.date.available | 2017-09-08T14:20:08Z | |
| dc.date.issued | 2017 | |
| dc.degree.discipline | Biosystems Engineering | en_US |
| dc.degree.level | Master of Science (M.Sc.) | en_US |
| dc.description.abstract | Wood chip bioreactors can be installed at subsurface drainage outlets in order to decrease the concentration of nitrate (NO3-) discharged to receiving waters. A laboratory column study was conducted to determine NO3-N removal in wood chip bioreactors under saturated and unsaturated conditions. Nitrate-N was added at a concentration of 100 mg/l to columns filled with wood chips and effluent samples were collected daily for NO3-N analysis. Once the denitrifying bacteria communities had established in the bioreactors, NO3-N removal under saturated conditions (85.4 and 92.8%) was significantly higher (p < 0.0001) compared to unsaturated conditions (2.8 and 21.4%). Using these results, in-field wood chip bioreactor sizing was determined for four different daily precipitation rates in southern Manitoba. The bioreactors were designed to maintain saturated conditions. The bioreactor volume was based on a three-day hydraulic retention time (HRT) to attain NO3-N removal for the chosen precipitation values. | en_US |
| dc.description.note | October 2017 | en_US |
| dc.identifier.uri | http://hdl.handle.net/1993/32515 | |
| dc.language.iso | eng | en_US |
| dc.rights | open access | en_US |
| dc.subject | Subsurface agricultural drainage | en_US |
| dc.subject | Tile drainage | en_US |
| dc.subject | Nitrate reduction | en_US |
| dc.subject | Denitrification | en_US |
| dc.subject | Edge-of-field bioreactors | en_US |
| dc.subject | Wood chip bioreactors | en_US |
| dc.title | Improving the efficiency of wood chip bioreactors for removing nitrate from drainage water | en_US |
| dc.type | master thesis | en_US |
| local.subject.manitoba | yes | en_US |