| In groundwater and surface water are likely to have excessive manganese iron and manganese iron, which will have various effect on the human body. We must have a certain process to remove them. Biological manganese removal technology have been used in several plant put into production in our country for the process is simple, cover an area of an area small, etc. But for now the technology has some problems, such as long training period and low manganese removal efficiency. It is needed to in-depth research community structure of biological filter column for more, to provide theoretical support for thoroughly solving the problem of application of biological filter column. A lot of water polluted by organic matter, including the main component of humic acid. And the influence of humic acid to mature manganese filtration column is not clear. it also needs further research the humic acid removal effect of biological filter column itself.In this study, two lab-scale glass columns were researched. The main research include the impact of inflow of manganese concentration on the biological filter start speed, the effect of humic acid concentration on the running status and the influence of filter column on the removal efficiency to different training phases flora distribution and dynamic, the main conclusions are as follows:.Under the condition of 0.6 mg/L manganese concentration, the two reactors are manganese removal efficiency can reach 99% a week later. Then improved the filtering speed, manganese removal efficiency did not change. Improved water manganese concentration to 2 mg/L, A reactor manganese removal efficiency to 80%, B reactor fell to 65% one week later. The reactor effluent met again after filtration speed reduced. The early stage of the iron removal efficiency fluctuated between 20% and 90%, late education basic remain above 75%.Water manganese concentration increased from 0.6 mg/L to 2 mg/L, the manganese removal filter layer by the first 40 cm down to 70 cm. Filtering speed reduced to 2 m/h after return to 6 m/h, due to factors such as bacterial adhesion, manganese removal filter layer and move forward to the first 30 cm.Humic acid concentration impacted a lot on iron, manganese and humic acid removal efficiency: with the increase of concentration of humic acid, iron and manganese removal rate will decline rapidly, after 4 to 6 days they restored stability. The removal rate of iron and humic acid as a whole will fell slightly with the increase of concentration of humic acid. Humic acid concentration increase will cause the manganese removal filter down significantly, but the iron, humic acid removal filter layer and no obvious changes. Humic acid removal rate reached 55%, whole permanganate overall removal rate of 35%, may be the changes of the humic acid.After the successful hang the film, the surface of the filter material attached to a large number of microorganisms, and the surface filter material iron content more than 45%, middle filter material manganese content more than 50%.Different culture in a phase of the filter material are very common in manganese oxide bacteria Hyphomicrobium, Pseudomonas and Pedomicrobium, manganese oxide bacteria relative content is 1.9 11.4%.The ratio of manganese oxide bacteria in the reactor with the training time by 6% to 4.5%, and then back to 6%.Manganese oxide bacteria on the surface of filter material ratio of 8.1%, middle filter material is 4.97%, the bottom filter material is 5.1%.Archaea community structure analysis showed that Thaumarchaeota is absolute advantage bacterium, main dominant population for Cenarchaeum, relative percentage is 35%- 67%. |
PDF Full Text Request