Effect of aeration interval on oxygen consumption and GHG emission during pig manure composting.

•O2 was consumed to <10 vol% only when the aeration interval was 50 min.•The aeration interval did not affect the CHG emission rates significantly.•GHG emission during aeration interval was much less than that during aeration period.•Intermittent aeration could reduce GHG emission compared with continuous aeration.•Lengthening the aeration interval duration could effectively reduce GHG emission.