三维荧光光谱解析城市污水有机物的去除特征

利用荧光区域积分结合物料平衡计算及多元直接梯度分析，考察强化除磷-硫自养系统对低COD/TN比市政污水中有机物、氮和磷污染物的去除特性.结果表明，在进水COD/TN比为4.5～6.0的条件下，强化除磷-硫自养系统出水中的TN、NH₄⁺-N和TP浓度分别降至1.31、1.11和0.23mg/L，其去除率分别达到了96.3%、96.0%和86.9%.强化除磷-硫自养系统对荧光区域Ⅰ～Ⅴ标准积分体积的去除率分别为73.7%、64.3%、50.6%、61.3%和28.1%.物料平衡计算表明，非曝气区对荧光区域Ⅰ、Ⅱ和Ⅳ的物质有明显的去除效果；好氧区对荧光区域Ⅰ、Ⅱ和Ⅲ的物质有明显的去除效果.多元直接梯度分析表明，磷的释放过程可能与溶解性微生物代谢产物荧光区中的有机物相关，而自养的硝化反应、吸磷过程和有机物的去除可在好氧区达到统一.

Assessing organic matter removal from municipal wastewater by excitation-emission matrix fluorescence

A novel Enhanced Biological Phosphorus Removal (EBPR)-Sulfur Autotrophic Denitrification integrated system was applied to treatment of municipal wastewater with low COD/TN ratio. Its pollutants removal performance was evaluated by the combination of fluorescence regional integration, materials balance calculation and redundancy analysis. The results showed that, with the influent COD/TN ratio of 4.5~6.0, the average effluent concentrations of TN, NH₄⁺-N and TP were 1.31, 1.11 and 0.23mg/L, and the corresponding removal rates reached 96.3%, 96.0% and 86.9%, respectively. Moreover, the normalized integral volumes of regions I~V were decreased by 73.7%, 64.3%, 46.9%, 61.3% and 31.8%, respectively. Material balance calculation further indicated that the aromatic protein-like and the soluble microbial byproduct-like materials were significantly decreased in the non-aerobic zones; the aromatic protein-like and the fulvic acid-like materials were more effectively removed in the aerobic zone. Meanwhile, redundancy analysis showed that phosphorus releasing was correlated with soluble microbial byproduct-like materials. In addition, autotrophic nitrification, phosphorus uptake and organic matter removal could simultaneously occur in the aerobic zone.