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

[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.