| It is an effective way to solve water shortage that reuse the municipal wastewater after advanced treatment. The water after secondary biochemical treatment by the urban sewage treatment plant still contains some residual pollutants, which has a major impact on human health and the aquatic environment. So there was an important practical significance to study on migration and transformation and control technology of micro-pollutants in municipal wastewater treatment plant.In this paper, the occurrence and fate of micro-pollutants in biological wastewater treatment process were studied. Heavy metals (Cr, Mn, Co, Ni, Cu, Zn, Rb, Ag, Cd, In, Ba, Pb, U) and endocrine disrupting chemicals (PCBs, PAHs, PAEs, Phnoels, OCPs) in sewage and sludge of municipal wastewater treatment plant can be detected. The average concentration of heavy metals and EDCs in sewage were 1.31μg/L～1994.1μg/L and 11.65ng/L～30.48μg/L, respectively. The concentration of micro-pollutants in sludge was higher. The average concentration of heavy metals and EDCs in sludge were 8.69mg/kg～10333.19mg/kg and 19.94ng/g～137.45μg/g, respectively. After the biological treatment of wastewater plant, the concentration of micro-pollutants in secondary effluent was reduced to some extent. The heavy metals were easy separated and adsorped by activated sludge, and the removal rate was 22.19%～87.59% (concentrations of Ni and U were raised slightly). Biological treatment is an effective way to remove EDCs from wastewater by adsorption and biodegradation, and the removal rate was 16.60%～77.90%. Among them, PCBs, PAHs and OCPs were removed mainly by adsorption of sludge, PAEs and phenols were mainly degraded by microorganisms.On this basis, the activated carbon adsorption and Fenton oxdition were used to treat secondary effluent of municipal wastewater plant in this paper. The influencing factors during removing pollutants of two processes were studied and the effects of removal micro-pollutants were analysised. The results showed that the removal effects of activated carbon and hydrogen peroxide to residual pollutants in secondary effluent were very well. The optimal control parameters of activated carbon: fill height was 60cm and filtration speed was 5m/h. On this condition, the average removal rate of turbidity, CODMn, UV254, TOC, heavy metals and EDCs respectively were 42.20%, 63.82%, 74.67%, 75.89%, 12.21%～78.68% and 50.84%～88.11%. The optimal control parameters of Fenton oxidation: the concentration of H2O2 was 16mg/L and the time was 60min. On this condition, the average removal rate of turbidity, CODMn, UV254, TOC, micro-organisms and EDCs were 80.39%, 51.24%, 81.58%, 76.50%, 99.50%～99.62% and 50.04%～77.88% , respectively.
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