Experimental Study Of Biological Removal Of Water Containing Low Concentration Of Iron And High Concentration Of Manganese

Groundwater is an important part of water resources in our country. The presenceof iron and manganese in groundwater restricts people using groundwater. These twoelements has quite an important impact on the physiological function of human bodies.The concentration of iron and manganese in the body which has a limit can cause avariety of diseases when it’s too high or too low. Since the Bio-solid manganese andmanganese theory proposed by the Academician Zhang Jie， a great number ofengineering practice has proved its usefulness and effectiveness. But in addition tofigure out the mechanism of Bio-solid manganese and manganese theory， there is stillmuch work to do.The research topics are mainly composed of three parts. The first research is thereactor start-up experiments， including the start-up of contact-oxidation iron removalreactor and the rapid start-up of biological purifying filter of groundwater containinglow concentration of iron and high concentration of manganese. Followed byexperimental research reactor running experimental study of the impact of iron andmanganese mainly on micro-organisms and water for removal of total ironconcentration of iron in addition to microorganisms. Finally， manganese bacteriamicrobiological studies are conducted， including efficient separation of manganesebacteria and in addition to the reactor and the actual water samples were sequenced.Reactor start-up experiments showed that in the start-up of contact-oxidation ironremoval reactor experiment， using a higher total iron concentration in the water， highfiltration rate， and frequent backwashing way to start the reactor is a cost-effectivestart-up method. For biological removal of iron and manganese reactor at low iron andhigh manganese water environment， full cycle， low filtration rate， and the adding ofnutrients which refer to the composition of MSVP medium for microbial growthprovide a favorable conditions to quartz sand filter for biological removal of iron andmanganese reactor， the start-up time is thus greatly reduced.Experimental study of the process running the reactor， the microbial effects ofiron removal experiments indicate the presence of microorganisms in the filter layer to enhance the Fe （Ⅱ） oxidation ability of the reactor. The ability of the filter layerwhich contains micro-organisms to trap the iron oxide has been enhanced， but theperformance of the enhancement is not obviouss. In the biological removal of iron andmanganese filter， iron in the water is indispensable. If the concentration of the iron inwater is too high or too low， there will be a great influence on the removal ifmanganese. Manganese concentrations in the water will cause a rise in the total ironconcentration， but this change has little effect on the total iron content of the water canbe restored quickly. Changes in the concentration of total iron filter layer in addition tothe impact on the ability of manganese removal.In the microbiology experiments of manganese oxidation bacteria， we get eightstrains of manganese oxide functions in the high manganese bacteria isolatedexperiments， they belong to Pseudomonas， Bacillus and Arthrobacter. Thesemicrobial degradation rates of manganese are in descending order. Molecular biologyanalysis experiments using a strong MOBIO DNA kit improve the soil quality of DNAextracted. High-throughput sequencing analysis results can prove that the microbialcommunity structure is related to the water quality conditions. To the water with a lowconcentration of iron and high concentration of manganese or a high concentration ofiron and high concentration of manganese， Betaproteobacteria is the dominating flora.To the water with a high concentration of iron， manganese and ammonia.Gammaproteobacteria is the dominating flora.