| Photosynthetic bacteria is widely used in aquaculture and other cultivation industry withplentiful research in recent years; however, researches of treating bacteria by physical methodsare relatively few. In this paper, photosynthetic bacteria are treated with low-intensity electricfield and magnetic field to study the intrinsic variations of the nutrient content and biologicalnature.Electric field used here are1V/cm,2V/cm,3V/cm,4V/cm,5V/cm and6V/cm, respectively,and each applied for20minutes. The results show that, after72hours, electric field affects thephotosynthetic bacteria in biomass, proteins, liquid PH value, content of vitamin B6, as well asthe ammonia nitrogen, nitrite nitrogen, phenol and dissolved oxygen in water. Biomass ofphotosynthetic bacteria is the highest after treated by electric field of2V/cm for72hours; yieldof proteins increases most after treated by1V/cm for72hour; content of vitamin B6increasemost after treated by4V/cm for72hour; liquid PH value is minimum after treated by6V/cm for72hour. The next step, photosynthetic bacteria are applied to deal with the breeding wastewaterafter treated by electric field with different intensity, and then, the performances of wastewaterare analyzed. The dissolved oxygen in wastewater is the highest disposed by bacteria treatedwith4V/cm for48hours; removal rate of ammonia nitrogen in wastewater is the largest disposedby bacteria treated by5V/cm for72hours; bacteria treated by6V/cm for24hours and48hourscorrespondingly applied to dispose the wastewater and the wastewater with phenol have thelargest removal rate of nitrite nitrogen and phenol, respectively.Magnetic field used here are2mT,4mT,6mT,8mT and10mT, respectively, and each appliedfor20minutes also. The results show that, after72hours, magnetic field affects thephotosynthetic bacteria in biomass, proteins, liquid PH value, content of vitamin B6, as well asthe ammonia nitrogen, nitrite nitrogen, phenol and dissolved oxygen in water. Biomass ofphotosynthetic bacteria is the highest after treated by magnetic field of6mT for72hours; yieldof proteins increases most after treated by4mT and6mT for48hour; content of vitamin B6increase most after treated by6mT for72hour; liquid PH value is minimum after treated by10mT for48hour. The next step, photosynthetic bacteria are applied to deal with the breedingwastewater after treated by magnetic field with different intensity, and then, the performances ofwastewater are analyzed. The dissolved oxygen in wastewater is the highest disposed by bacteriatreated with4mT for72hours; removal rate of ammonia nitrogen and nitrite nitrogen inwastewater are the largest disposed by bacteria treated by8mT for72hours and that by10mT for24hours, respectively; bacteria treated by2mT for48hours have the highest removal rate ofphenol in the phenol-contained wastewater. |
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