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For most of our groundwater manganese content generally exceeded the current situation , the subject simulate groundwater and through the model filtration column test in the laboratory to study the groundwater biological oxidation of manganese and manganese removal characteristics and mechanism . Test train mature filter column filtration rate , pH , temperature , and concentration of load factors on the biological removal of manganese ; but also to explore Fe 2 concentration of biological manganese removal and quartz sand filtration columns inoculated . The flow conditions of the experiment : [Mn 2 ] to 0.5 to 1.0 mg / L [ Fe 2 ] 0.1mg / L, pH value of 6.5 ~ 7.0, DO 5 ~ 6mg / L, water temperature is 14-28 ° C , the filter column cultured initial filtration rate is 2 to 8 m / h . The test results show that , in addition to manganese quartz sand filter through the medium inoculated mature for 55 days , can effectively remove the manganese in the raw water , and the water quality is good . However , by directly as mature filter strains the start of a new filter column , you can not achieve the purpose of vaccination . Single factors experiments The experiments were carried out on the concentration, pH , temperature , filtration velocity , i.e. water in the other running conditions for the same case , changing only one affect the value of the factors , the removal rate of this trial compared . Experimental results show that the influent concentration > 3mg / L , biological filtration column filter column the manganese reduced efficiency , water manganese content exceeded , in addition to the manganese maximum of 3mg / L; biological removal of manganese filtration column adaptable pH value , pH value between 6.0 to 7.5 can effectively remove the manganese content in water 1.0mg / L or less , the filter layer and manganese removal rate increased with increasing pH value . Inlet temperature of 20 ° C , the biological effect in addition to manganese best; improve as the filtration rate of removal of manganese biological filter layer thickness , the greater the premise to ensure water quality , the choice of the filtration rate filter layer thickness , influent manganese content , and other factors . Ferrous iron and manganese effects have a significant impact on the biological filter . Filtration column is ripe , when the influent containing divalent iron ions , manganese removal efficiency of the filter column decreased ; However , when the influent contains a small amount of divalent iron ions , manganese removal efficiency of the filter column gradually improve . Therefore, the paper argues that the microbial activity in addition to manganese filtration column divalent iron ions .
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