植物废弃物的释碳能力对生物反硝化作用的影响

Effect of Carbon Release Capacity of Plant Waste on Biological Denitrification

采用甘蔗渣、木屑等植物废弃物作为固体碳源,研究了温度、时间、固液比、粒径和搅拌强度等对碳源释碳能力的影响。利用SBR工艺研究这两种固体碳源对废水生物反硝化作用的影响。结果表明,固液比对释碳能力影响最明显,其次是时间。两种固体碳源投加后,随着投加量的增加,生物反应中缺氧段脱氮率、总脱氮率以及COD的去除率都上升。木屑作为碳源时,三种去除率最高。分别为42%,86.74%,89.20%;甘蔗作为碳源时,三种去除率最高分别为70.15%、95.53%、78.40%。

Sugarcane bagasse,sawdust and other plant wastes were used as solid carbon sources.The effects of temperature,time, solid-liquid ratio,particle size and stirring intensity on carbon release capacity of carbon sources were studied.SBR process was used to study the effect of these two solid carbon sources on the biological denitrification of wastewater.The results show that the solid-liquid ratio has the most obvious effect on the carbon release capacity,followed by time.After adding two kinds of solid carbon sources,the denitrification rate,total denitrification rate and COD removal rate in the anoxic stage of the biological reaction are all increasing with the increase of the amount of carbon sources.When sawdust was used as carbon source,the three removal rates were 42%,86.74%, 89.20% respectively;when sugarcane was used as carbon source,the three removal rates were 70.15%,95.53%,78.40% respectively.