生物陶粒MBBR同步硝化反硝化脱氮试验研究

利用生物陶粒作为移动床生物膜反应器(MBBR)的填料,通过试验考察了MBBR发生同步硝化反硝化(SND)的可能性。分析了溶解氧和碳氮质量比对SND的影响。试验结果表明:MBBR具有良好的有机物去除及同步硝化反硝化能力。溶解氧的质量浓度在3 mg/L左右时,不仅能够满足硝化作用的需要而且又不严重抑制反硝化作用,NH3-N去除率达到81.45%的同时TN去除率为60.35%;进水碳氮质量比在10左右时,NH3-N、TN去除率分别为81.65%、63.60%。

Experimental research on nitrogen removal by simultaneous nitrification and denitrification in bio-ceramic filled MBBR

Bio-ceramic was used as filler for moving bed biofilm reactor(MBBR),the possibility of simul-taneous nitrification and denitrification(SND) in MBBR was investigated,and the influences of DO and C / N mass ratio on SND were analyzed.The results of the test showed that: MBBR had good organic matter-removal ability and SND ability.When the mass concentration of DO was about 3 mg / L,the reactor was able to meet the needs of nitrification without restrain denitrification seriously,the removal rates of NH3-N and TN reached 81.45% and 60.35% respectively;While the influent C / N mass ratio was about 10,the removal rates of the above two contaminants were 81.65% and 63.60% respectively.