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Biological aerated filter (BAF) was used to treat low -temperature groundwater containing iron and high concentrations of manganese and ammonia nitrogen. The influence factors on biological oxidation such as operating parameters and time, concentrations of raw water and backwashing were investigated. The research results showed that the biological oxidation of iron and manganese has achieved steady...
The oxidation of ammonia nitrogen at a low concentration in synthetic micro-polluted water by immobilized nitrobacteria pellets in inner-circulated biological fluidized bed reactor was investigated with the system operated continuously under the condition of temperature 20~30CC, DO 3~5 mg/L. The concentrations of effluent NH4+-N and NO2--N are below 0.3 mg/L at the influent concentration of 10~15...
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