固定化藻菌去除淡水养殖废水氨氮效果及模型拟建

Effect Research of Immobilized Algae-bacteria Removal Ammonia Nitrogen of Aquaculture Wastewater and Proposed Model

[目的]研究固定化藻菌去除淡水养殖废水氨氮效果及模型拟建。[方法]利用固定化藻菌(ABI)处理淡水养殖废水中的氨氮,采用多因子正交试验得到温度(T)、pH、光照强度(I)、溶解氧(DO)和填充率五因子与氨氮去除率(AR)之间的关系数据,拟建五因子与AR关系模型。[结果]五因子对AR均具有显著影响,最佳去氨氮组合为:温度30℃、pH值7.0、光照强度6000lx、溶解氧5.0mg/L、填充率10%。根据试验数据拟建的方程模型决定系数R2=0.8648、相伴概率P<0.05,对AR的模型预测值与实际测值进行样本T-检验,结果表明总体均值差异显著值sig.为0.978(P>0.05),模型预测值与实际测值数据组无显著性差异,模型具有较高拟合度。[结论]为实现养殖废水中氨氮去除或浓度降低提供了参考依据。

[Objective]The aim was to research the effect of immobilized algae-bacteria removal ammonia nitrogen of aquaculture wastewater and model construction. [Method]Immobilized algae bacteria （ABI） was applied to remove ammonia of freshwater aquaculture wastewater. Five tactor of temperature （T）,pH,light intensity （I）,dissolved oxygen （DO） and filling rate were used for Multi-factor orthogonal test and related data between ammonia removal and five factors was received,then relations model between the five factor and nitrogen removal was established.[Result]The results showed that five-factors had significant effect on AR,and the best combinations for removing AR was temperature 30 ℃,pH7.0,light intensity 6 000 lx,dissolved oxygen 5.0 mg/L and the fill rate 10%.According to the experimental data,equation model was proposed and coefficient of determination R2 =0.864 8,P0.05. Samples T-test was done between the model predictions and the actual measured values,and the results showed that the significant difference of overall mean value sig. （2-tailed） was 0.978 （P0.05）,which indicated that there was no significant difference between model predictions and the actual measured value,and model had a high degree of fitting. [Conclusion]The study provided a reference for realizing removal ammonia nitrogen of aquaculture wastewater and concentration decline.