In vitro evaluation of nano zinc oxide (nZnO) on mitigation of gaseous emissions
| Autor: | Kendall C Swanson, Niloy Chandra Sarker, Shafiqur Rahman, Md. Saidul Borhan, F. E. Keomanivong |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Concentration Rumen Veterinary (miscellaneous) Hydrogen sulfide Population Liquid manure chemistry.chemical_element Biochemistry Genetics and Molecular Biology (miscellaneous) 03 medical and health sciences chemistry.chemical_compound Nanoparticle education lcsh:SF1-1100 education.field_of_study Ecology Research 0402 animal and dairy science Substrate (chemistry) 04 agricultural and veterinary sciences 040201 dairy & animal science 030104 developmental biology Greenhouse gases chemistry Feed Greenhouse gas Environmental chemistry Animal Science and Zoology Gas chromatography lcsh:Animal culture Carbon Food Science |
| Zdroj: | Journal of Animal Science and Technology, Vol 60, Iss 1, Pp 1-8 (2018) Journal of Animal Science and Technology |
| ISSN: | 2055-0391 |
| Popis: | Background Enteric methane (CH4) accounts for about 70% of total CH4 emissions from the ruminant animals. Researchers are exploring ways to mitigate enteric CH4 emissions from ruminants. Recently, nano zinc oxide (nZnO) has shown potential in reducing CH4 and hydrogen sulfide (H2S) production from the liquid manure under anaerobic storage conditions. Four different levels of nZnO and two types of feed were mixed with rumen fluid to investigate the efficacy of nZnO in mitigating gaseous production. Methods All experiments with four replicates were conducted in batches in 250 mL glass bottles paired with the ANKOMRF wireless gas production monitoring system. Gas production was monitored continuously for 72 h at a constant temperature of 39 ± 1 °C in a water bath. Headspace gas samples were collected using gas-tight syringes from the Tedlar bags connected to the glass bottles and analyzed for greenhouse gases (CH4 and carbon dioxide-CO2) and H2S concentrations. CH4 and CO2 gas concentrations were analyzed using an SRI-8610 Gas Chromatograph and H2S concentrations were measured using a Jerome 631X meter. At the same time, substrate (i.e. mixed rumen fluid+ NP treatment+ feed composite) samples were collected from the glass bottles at the beginning and at the end of an experiment for bacterial counts, and volatile fatty acids (VFAs) analysis. Results Compared to the control treatment the H2S and GHGs concentration reduction after 72 h of the tested nZnO levels varied between 4.89 to 53.65%. Additionally, 0.47 to 22.21% microbial population reduction was observed from the applied nZnO treatments. Application of nZnO at a rate of 1000 μg g− 1 have exhibited the highest amount of concentration reductions for all three gases and microbial population. Conclusion Results suggest that both 500 and 1000 μg g− 1 nZnO application levels have the potential to reduce GHG and H2S concentrations. |
| Databáze: | OpenAIRE |
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