Microaerobic anaerobic digestion is a type of anaerobic digestion between anaerobic and aerobic environments with low concentration of dissolved oxygen.It has advantages over traditional anaerobic digestion because it doesn't require for additional treatment facilities and the aeration rate can be precisely controlled,which can achieve higher bioconversion and methane production.It is a reliable and effective method for the energy conversion of organic waste.Presently,microaerobic anaerobic digestion,a new research direction of anaerobic digestion in recent years,has been proved to have unique advantages in improving microbial diversity,accelerating hydrolysis,reducing hydrogen sulfide generation,improving methane production,etc.This paper combed the researches on microaerobic anaerobic digestion in recent 20 years,expounded its concept and mechanism,summarized the impact of microaerobic on anaerobic digestion and its application,analyzed its influencing factors,and pointed out its existing problems and the future development direction.It is expected that this paper can provide scientific basis and support for the improvement and application of microaerobic anaerobic digestion system.
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