Mitigation of nitrous oxide (N2O) emission from swine wastewater treatment in an aerobic bioreactor packed with carbon fibers

Autor:	Takashi Osada, Ryoko Yamamoto-Ikemoto, Hiroshi Yokoyama, Hirofumi Kawahara, Takahiro Yamashita, Akifumi Ogino
Rok vydání:	2014
Předmět:	chemistry.chemical_compound Activated sludge Denitrification chemistry Swine wastewater Inorganic chemistry Bioreactor Dissolved inorganic nitrogen General Medicine Nitrous oxide General Agricultural and Biological Sciences NOx Nuclear chemistry
Zdroj:	Animal Science Journal. 86:358-368
ISSN:	1344-3941
DOI:	10.1111/asj.12302
Popis:	Mitigation of nitrous oxide (N2 O) emission from swine wastewater treatment was demonstrated in an aerobic bioreactor packed with carbon fibers (CF reactor). The CF reactor had a demonstrated advantage in mitigating N2 O emission and avoiding NOx (NO3 + NO2 ) accumulation. The N2 O emission factor was 0.0003 g N2 O-N/gTN-load in the CF bioreactor compared to 0.03 gN2 O-N/gTN-load in an activated sludge reactor (AS reactor). N2 O and CH4 emissions from the CF reactor were 42 g-CO2 eq/m(3) /day, while those from the AS reactor were 725 g-CO2 eq/m(3) /day. The dissolved inorganic nitrogen (DIN) in the CF reactor removed an average of 156 mg/L of the NH4 -N, and accumulated an average of 14 mg/L of the NO3 -N. In contrast, the DIN in the AS reactor removed an average 144 mg/L of the NH4 -N and accumulated an average 183 mg/L of the NO3 -N. NO2 -N was almost undetectable in both reactors.
Databáze:	OpenAIRE
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