Abstract
Feasibility of enhancing nutrient removal in municipal sewage plant by using iron shavings in conventional biological treatment reactor was evaluated. Results of 209-days bench-scale test indicate that this method is feasible in practice. Compared to control test, TN and TP removal was increased 8.72 % and 57.83 %, respectively，by adding 400 g iron shavings in 75 L biological reactor. Effluent TP concentration could attain level 1A (0.5 mg L-1) of China's urban sewage treatment plants discharge standards; Total iron concentration in effluent was 0.249 mg L-1 and iron consumption rate was 762.7 mg d-1 during stable period. The enhancing effect of iron shaving on nutrient removal is easy to achieve and low-cost. It is worth investigating in a deep-going way.
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