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Mitigation of nitrous oxide ( N 2 O ) emission from swine wastewater treatment in an aerobic bioreactor packed with carbon fibers
Author(s) -
Yamashita Takahiro,
YamamotoIkemoto Ryoko,
Yokoyama Hiroshi,
Kawahara Hirofumi,
Ogino Akifumi,
Osada Takashi
Publication year - 2015
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/asj.12302
Subject(s) - nitrous oxide , bioreactor , wastewater , chemistry , nitrogen , nox , sequencing batch reactor , nuclear chemistry , packed bed , activated carbon , chromatography , waste management , adsorption , organic chemistry , combustion , engineering
Mitigation of nitrous oxide ( N 2 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 N 2 O emission and avoiding NOx ( NO 3 + NO 2 ) accumulation. The N 2 O emission factor was 0.0003 g N 2 O ‐ N / gTN ‐load in the CF bioreactor compared to 0.03 g N 2 O ‐ N / gTN ‐load in an activated sludge reactor ( AS reactor). N 2 O and CH 4 emissions from the CF reactor were 42 g‐ CO 2 eq/m 3 /day, while those from the AS reactor were 725 g‐ CO 2 eq/m 3 /day. The dissolved inorganic nitrogen ( DIN ) in the CF reactor removed an average of 156 mg/L of the NH 4 ‐ N , and accumulated an average of 14 mg/L of the NO 3 ‐ N . In contrast, the DIN in the AS reactor removed an average 144 mg/L of the NH 4 ‐ N and accumulated an average 183 mg/L of the NO 3 ‐ N . NO 2 ‐ N was almost undetectable in both reactors.