Effect of light quality combination on decontamination performance of bacterial-algal symbiotic system and operation optimization
The bacterial-algal symbiotic system(BASS)can effectively control nitrogen,phosphorus and organic pollution in water,and the comprehensive influence of light quality combinations under different wavelengths and operating parameters on the pollutant removal ability of the BASS still need to be further studied.Taking the BASS as the research object,the light quality combination experiment was carried out to determine the optimal light quality combination,and light intensity,bacterial and algal inoculation ratio(dry weight ratio),and light time were selected to design orthogonal experiments under the best light quality conditions.The optimal operating conditions for efficient pollutant removal in the BASS were investigated by constructing a weight matrix through independent extreme variance analysis using the matrix analysis method.The results showed that the ratio of red and blue light at 8∶2 was the best light quality for chlorella to exert pollutant removal performance.When the best operating conditions of light intensity at 4 000 lx,bacterial and algal inoculation ratio at 1∶5 and light time at 9 h·d-1 were adop ted,the removal rates of chemical oxygen demand(COD),total nitrogen(TN)and total phosphorus(TP)in red-blue(8∶2)light BASS were 90.0％,79.1％and 81.9％,respectively.
bacterial-algal symbiotic systemcombination of light qualitymatrix analysis methodorthogonal testpollutant
万方数据
维普
