Concurrent nitrate and atrazine retention in bioreactors of straw and bark mulch at short hydraulic residence times

Camilo, B. Krause; Matzinger, Andreas; Litz, Norbert; Tedesco, Lenore P.; Wessolek, Gerd

doi:10.1016/j.ecoleng.2013.02.010

Cited by 21 publications

(15 citation statements)

References 55 publications

(61 reference statements)

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“…As this technology matures, there are new questions about maximizing nitrate removal and minimizing the release of unintended pollutants (Healy et al, 2015). Despite the general acceptance of wood‐based fill, more labile carbon (C) media derived from agricultural residues (e.g., corn [ Zea mays L.] cobs [CC], barley [ Hordeum vulgare L.] straw [BS], and wheat [ Triticum aestivum L.] straw) have repeatedly shown greater nitrogen (N) removal rates than wood (Greenan et al, 2006; Cameron and Schipper, 2010; Warneke et al, 2011a; Krause Camilo et al, 2013). Although agricultural residue–based media have been associated with high levels of nutrient leaching (Gibert et al, 2008; Healy et al, 2012; Krause Camilo et al, 2013), these issues may be mitigated via start‐up under cool temperatures, shorter hydraulic retention times, and/or preflushing (Cameron and Schipper, 2010).…”

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confidence: 99%

Performance of Agricultural Residue Media in Laboratory Denitrifying Bioreactors at Low Temperatures

et al. 2016

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Denitrifying bioreactors can be effective for removing nitrate from agricultural tile drainage; however, questions about cold springtime performance persist. The objective of this study was to improve the nitrate removal rate (NRR) of denitrifying bioreactors at warm and cold temperatures using agriculturally derived media rather than wood chips (WC). Corn ( L.) cobs (CC), corn stover (CS), barley ( L.) straw (BS), WC, and CC followed by a compartment of WC (CC+WC) were tested in laboratory columns for 5 mo at a 12-h hydraulic residence time in separate experiments at 15.5 and 1.5°C. Nitrate-N removal rates ranged from 35 to 1.4 at 15.5°C and from 7.4 to 1.6 g N m d at 1.5°C, respectively; NRRs were ranked CC > CC+WC > BS = CS > WC and CC ≥ CC+WC = CS ≥ BS > WC for 15.5 and 1.5°C, respectively. Although NRRs for CC were increased relative to WC, CC released greater amounts of carbon. Greater abundance of nitrous oxide (NO) reductase gene () was supported by crop residues than WC at 15.5°C, and CS and BS supported greater abundance than WC at 1.5°C. Production of NO relative to nitrate removal (NO) was consistently greater at 1.5°C (7.5% of nitrate removed) than at 15.5°C (1.9%). The NO was lowest in CC (1.1%) and CC-WC (0.9%) and greatest in WC (9.7%). Using a compartment of agricultural residue media in series before wood chips has the potential to improve denitrifying bioreactor nitrate removal rates, but field-scale verification is needed.

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Performance of Agricultural Residue Media in Laboratory Denitrifying Bioreactors at Low Temperatures

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“…Besides of using the reactive ditch as a sediment trap and nutrient trap, future research could focus on retention of pesticides, whose negative impacts on aquatic ecosystems are of increasing interest. As shown by Krause Camilo et al (2013), wood chip-based filters implemented within the landscape might contribute to reduce these negative impacts.…”

Section: Discussionmentioning

confidence: 98%

“…The filter caused oxygen decrease, which is a requirement for denitrification (Rivett et al 2008;Krause Camilo et al 2013). In winter, higher oxygen concentrations were observed in comparison with other seasons.…”

Section: Discussionmentioning

confidence: 99%

“…However, one main feature of the wood chip filter is the faster degradation of biomass due to the contact with atmosphere in times of low water depths. According to Krause Camilo et al (2013), periodic dry conditions should be avoided to limit the problem of fast filter degradation. Since oxygen supports a fast degradation, we expect that the usability of the presented filter type is lower in comparison with foil covered or subsurface bioreactors as shown in other studies outside of Europe (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…However, for Europe, only few methods were tested at laboratory scale (Krause Camilo et al 2013) and at field scale (Izydorczyk et al 2013;Bednarek et al 2014). Despite of promising results, there is still no large-scale application of denitrifying bioreactors in Germany.…”

Section: Introductionmentioning

confidence: 98%

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Reactive ditches: A simple approach to implement denitrifying wood chip bioreactors to reduce nitrate exports into aquatic ecosystems?

et al. 2016

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Despite intensive efforts motivated by the European Water Framework Directive, many water bodies still suffer from poor water quality in Germany. Intensively drained agricultural areas are still a critical source for nitrate which is responsible for negative effects on aquatic ecosystems. Basic measures such as the fertiliser ordinance are expected to be not sufficient to completely eliminate nitrate exports via drainage tiles and ditches. Consequently, there is the demand to manage the reduction of nitrate concentrations with new additional end of pipe solutions. For this, the presented study focuses on a simply to implement reactive ditch for denitrification, which is installed into drainage ditches to reduce nitrate concentrations. An existing drainage ditch that is fed by tile drainage water was filled with wood chips to keep installation efforts as simple and cheap as possible. In situ parameters and nutrient concentrations were determined at the inflow and the outflow of the reactive ditch for 2 years.The results reveal a promising potential for wood chipbased filters to reduce nitrate concentrations by 28 % on average over all seasons. Within the filter, favourable conditions for denitrification were predominantly found without flooding of surrounding areas. Investigations revealed decreasing nitrate concentrations especially in cases of low flow rates and high temperatures. These encouraging results demonstrate the successful application of reactive ditches under German lowland conditions in general. Since tile drainages are installed for many agricultural areas in this region, there seems to be high potential for the application of this easily implementable type of bioreactor.

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Behavior of Atrazine and Its Degradation Products Deethylatrazine and Deisopropylatrazine in Oxisol Samples

Amadori

Barreto-Rodrigues

Rebouças

et al. 2016

Water Air Soil Pollut

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Concurrent nitrate and atrazine retention in bioreactors of straw and bark mulch at short hydraulic residence times

Cited by 21 publications

References 55 publications

Performance of Agricultural Residue Media in Laboratory Denitrifying Bioreactors at Low Temperatures

Performance of Agricultural Residue Media in Laboratory Denitrifying Bioreactors at Low Temperatures

Reactive ditches: A simple approach to implement denitrifying wood chip bioreactors to reduce nitrate exports into aquatic ecosystems?

Behavior of Atrazine and Its Degradation Products Deethylatrazine and Deisopropylatrazine in Oxisol Samples

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