Do volatile solids from bedding materials increase greenhouse gas emissions for stored dairy manure?

Riche, Etienne L. Le; VanderZaag, Andrew; Wagner-Riddle, Claudia; Dunfield, Kari E.; Sokolov, Vera

doi:10.1139/cjss-2016-0119

Cited by 9 publications

(18 citation statements)

References 25 publications

(56 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Control and medium pH treatments had 96 and 97% CH 4 reductions. This is consistent with Le Riche et al (2016, 2017), who reported that 98% of CO 2 –eq emissions were from CH 4 for manure from the same farm. The remainder of the total emissions in the control and medium pH treatments were from direct and indirect N 2 O emissions, which were <4% of the total CO 2 –eq.…”

Section: Resultssupporting

confidence: 92%

“…There was limited manure surface crusting observed in all tanks, which has previously been observed for sand bedding manure (Le Riche et al, 2017). The limited crusting suggests that there were few low‐density solids that floated to the top and the majority settled to the bottom.…”

Section: Resultssupporting

confidence: 71%

“…Le Riche et al (2017) measured N 2 O emissions from manure with wood shavings as bedding, which formed a surface crust. They found N 2 O emissions of 11.5 g m −2 , which is 10 times that of manure with sand bedding.…”

Section: Resultsmentioning

confidence: 99%

“…They found N 2 O emissions of 11.5 g m −2 , which is 10 times that of manure with sand bedding. The low emissions from manure with sand bedding are due to lack of crust formation on top of manure, which creates an environment for nitrification (VanderZaag et al, 2009; Le Riche et al, 2017). The absence of crust is a more influential factor than pH level on the emission of N 2 O.…”

Section: Resultsmentioning

confidence: 99%

“…The chambers created an enclosed environment where air was continuously drawn across the manure surface at a rate of ∼0.5 m 3 s −1 from the inlet opening to the exhaust fan. This created laminar air flow within the chambers with about two full air exchanges per minute (Wood et al, 2012; Le Riche et al, 2017). This air flow rate ( Q ) was measured using cup anemometers (Davis Instruments) within the venturi outflow ports of each tank, and 1‐min averages were recorded by a CR1000 datalogger (Campbell Scientific).…”

Section: Methodsmentioning

confidence: 99%

See 4 more Smart Citations

Greenhouse Gas Mitigation through Dairy Manure Acidification

et al. 2019

Self Cite

View full text Add to dashboard Cite

Liquid dairy manure storages are sources of methane (CH4), nitrous oxide (N2O), and ammonia (NH3) emissions. Both CH4 and N2O are greenhouse gases (GHGs), whereas NH3 is an indirect source of N2O emissions. Manure acidification is a strategy used to reduce NH3 emissions from swine manure; however, limited research has expanded this strategy to reducing CH4 and N2O emissions by acidifying dairy manure. This study compared control dairy manure (pH 7.4) with two treatments of acidified manure using 70% sulfuric acid (H2SO4). These included a medium pH treatment (pH 6.5, 1.4 mL acid L−1 manure) and a low pH treatment (pH 6, 2.4 mL acid L−1 manure). Emissions were measured using replicated mesoscale manure tanks (6.6 m2) enclosed by large steady state chambers. Both CH4 and N2O were continuously measured (June–December 2017) using tunable diode laser trace gas analyzers. Ammonia emissions were measured three times weekly for 24 h using acid traps. On a CO2 equivalent basis, the medium pH treatment reduced total GHG emissions by 85%, whereas the low pH treatment reduced emissions by 88%, relative to untreated (control) manure. Total CH4 emissions were reduced by 87 and 89% from medium and low pH tanks, respectively. Ammonia emissions were reduced by 41 and 53% from medium and low pH tanks, respectively. Additional research is necessary to make acidification an accessible option for farmers by optimizing acid dosage. More research is need to describe the manure buffering capacity and emission reductions and ultimately find the best approaches for treating farm‐scale liquid dairy manure tanks. Core Ideas Acidification reduced total CO2–eq GHGs from liquid dairy manure by 85 to 88%. Total CH4 emissions were reduced by 87 to 89% from acidified manure. NH3 emissions were reduced by 41 to 53% from acidified manure. A range of yearly H2SO4 cost was estimated to be Can$6.55 to $19.6 cow−1.

show abstract

Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Greenhouse Gas Mitigation through Dairy Manure Acidification

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

Does overwintering change the inoculum effect on methane emissions from stored liquid manure?

et al. 2020

Self Cite

View full text Add to dashboard Cite

Greenhouse gas (GHG) emissions, especially methane (CH4), from manure storage facilities can be substantial. Methane production requires adapted microbial communities (“inoculum”) to be present in the manure. Complete removal of liquid dairy manure (thus removing all inoculum) from storage tanks in the spring has been shown to significantly reduce CH4 emissions over the following warm season. This study examined whether the same mitigation effect would occur after fall removal of liquid dairy manure. Emissions of CH4, nitrous oxide (N2O), ammonia (NH3), and CO2 were measured from six 11.88‐m3 tanks equipped with flow‐through chambers. There were three inoculated controls (20% inoculum) and three uninoculated treatments, where inoculum was completely removed in the fall/winter (0% inoculum). Direct N2O and NH3 (indirect N2O) were minor contributors to the total GHG budget, contributing <2% on a CO2 equivalent (CO2e) basis. Removal of inoculum led to a 34% decrease in total emissions on a CO2e basis and to a 29% decrease in the CH4 conversion factor compared with the inoculated control (0.37 vs. 0.52; p = .01). Overall, removing inoculum in the fall reduced CH4 emissions from manure storage tanks; however, fall inoculum removal was less effective than in a previous study where inoculum was removed in the spring. The timing of inoculum removal may affect the efficiency of this CH4 mitigation strategy. However, this method may be impractical for larger manure storage tanks. Further study is required to overcome challenges of time‐sensitive, complete inoculum removal from farm‐scale storage tanks.

show abstract

Understanding methane emission from stored animal manure: A review to guide model development

et al. 2021

View full text Add to dashboard Cite

National inventories of methane (CH 4 ) emission from manure management are based on guidelines from the Intergovernmental Panel on Climate Change using countryspecific emission factors. These calculations must be simple and, consequently, the effects of management practices and environmental conditions are only crudely represented in the calculations. The intention of this review is to develop a detailed understanding necessary for developing accurate models for calculating CH 4 emission from liquid manure, with particular focus on the microbiological conversion of organic matter to CH 4 . Themes discussed are (a) the liquid manure environment; (b) methane production processes from a modeling perspective; (c) development and adaptation of methanogenic communities; (d) mass and electron conservation; (e) steps limiting CH 4 production; (f) inhibition of methanogens; (g) temperature effects on CH 4 production; and (h) limits of existing estimation approaches. We conclude that a model must include calculation of microbial response to variations in manure temperature, substrate availability and age, and management system, because these variables substantially affect CH 4 production. Methane production can be reduced by manipulating key variables through management procedures, and the effects may be taken into account by including a microbial component in the model. When developing new calculation procedures, it is important to include reasonably accurate algorithms of microbial adaptation. This review presents concepts for these calculations and ideas for how these may be carried out. A need for better quantification of hydrolysis kinetics is identified, and the importance of short-and long-term microbial adaptation is highlighted.

show abstract

Do volatile solids from bedding materials increase greenhouse gas emissions for stored dairy manure?

Cited by 9 publications

References 25 publications

Greenhouse Gas Mitigation through Dairy Manure Acidification

Greenhouse Gas Mitigation through Dairy Manure Acidification

Does overwintering change the inoculum effect on methane emissions from stored liquid manure?

Understanding methane emission from stored animal manure: A review to guide model development

Contact Info

Product

Resources

About