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盐度对垃圾渗滤液亚硝酸型反硝化动力学特性的影响

Keywords: 盐度,垃圾渗滤液,反硝化,动力学

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Abstract:

为了考察在盐度影响下亚硝酸型反硝化动力学特性,采用长期处理垃圾渗滤液的SBR反应器内具有良好短程生物脱氮特性的活性污泥进行亚硝酸型反硝化批次试验,通过函数拟合确立动力学方程及动力学参数,研究结果表明:盐度的突升或突降都会使比反硝化速率减慢,并且影响程度随初始ρ(NO-2-N)的增加而增大,在盐度为10g/L,初始ρ(NO-2-N)为100mg/L时,比反硝化速率(以N计)达最大值16.28mg/(gVSS·h).活性污泥系统中微生物的比反硝化特性在各盐度下均符合Andrews模型,且盐度的升高和降低会使系统的最大比反硝化速率μmax和半饱和常数Ks下降,抑制常数Ki上升.在10g/L盐度下,μmax(以NO-2-N计)=22.57mg/(gVSS·h),Ks=20.71mg/L,Ki,min=613.32mg/L.

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