厌氧氨氧化过程中COD及pH与基质浓度之间的关系

分析了上向流厌氧氨氧化生物滤池中氮素化合物浓度、COD和pH变化规律以及ANAMMOX活性和生物量的分布规律,利用数理统计的方法研究了厌氧氨氧化过程中COD和pH与氮素基质浓度之间的关系.结果表明,溶解氧和氮负荷的共同作用使得ANAMMOX活性和生物量的分布沿滤层深度呈"山脊"状不均匀分布;异养反硝化的存在和H+的消耗使得厌氧氨氧化过程中COD和pH分别呈降低和升高趋势;100 mg/L以下的有机物浓度对厌氧氨氧化菌的影响不大,且COD和pH与基质NH4+-N浓度之间呈良好的线性相关关系.本试验中COD-NH4+-N和pH-NH4+-N拟合直线的斜率分别为1.113 8±0.052 2和-0.111 3±0.001 2,置信度为95%,平均相关系数R2分别为0.982 3和0.985 0.

Relations of the Substrate Concentration to the COD and pH in the ANAMMOX Process

Analyzed the change rules of the concentration of nitrogen compounds, COD and pH in the upflow ANAMMOX biofilter, and the distribution rules of the ANAMMOX activity and biomass. And furthermore, the relations of the nitrogen compounds concentration to the COD and pH in the ANAMMOX process were studied with the statistical method. The results showed that the dissolved oxygen and nitrogen load together caused the uneven distribution of the ANAMMOX activity and biomass along the filter layer in a "ridge" shape; the existence of heterotrophic denitrification and the consumption of H~+ made the COD decrease and the pH increase in the ANAMMOX process; the concentration of the organic matters below 100 mg/L has little influence on ANAMMOX bacteria, and the relations of the substrate NH_4~+ -N concentration to the COD and pH showed a good linear correlation. The slopes of the fitting line of the COD-NH_4~+-N and pH-NH_4~+ -N were 1.113 8 ±0.052 2 and -0.111 3 ± 0.001 2 respectively, with the confidence level being 95% and the average correlation coefficient R 0.982 3 and 0.985 0 respectively.