Research Progress on Influence Mechanism of Ammonifying Microbial Communities on Nitrogen Transformation During Sludge Composting
The nitrogen loss and environmental pollution caused by the large emissions of ammonia(NH3)and nitrous oxide(N2O)during the sludge composting process are practical problems that have not been effectively solved.The formation and release mechanism of nitrogen-containing gases(NH3 and N2O)are the keys for controlling nitrogen loss in composting.The ammonia assimilating bacterial community can synthesize glutamic acid from ammonium nitrogen,convert inorganic nitrogen into organic nitrogen,and fix it in sludge compost,thereby improving the nitrogen conversion rate of compost and preventing nitrogen loss.In order to provide references for improving the manurial effect of sludge compost and promoting green and sustainable development of agriculture,the research status of the basic characteristics of ammonia assimilating bacterial communities,nitrogen transformation mechanisms,genetic engineering optimization,and their impact on sludge composting are reviewed.The research directions of ammonia assimilating bacterial communities are prospected from the aspects of their application potential,ammonia oxidation inhibition,competition and adaptability,sludge characteristics and the systematic operation and management of nitrogen transformation processes.
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维普
