TRANSFORMATION AND PRACTICE OF A SEWAGE TREATMENT PLANT IN NEW MODEL OF SPONGE CITY CONSTRUCTION
In the process of the reform of the integration of urban and rural water affairs,a water group in southern China has innovatively explored a new model of sponge city reconstruction and expansion according to local conditions,closely followed the sponge design theme in the transformation of sewage treatment plants,and deeply integrated"double carbon"green development concept and"technology+"cultural educational concepts.The improvement rates of CODcr,TP,NH3-N and TN removal by the sewage treatment plant are 9％,48％、5％、43％.The removal rates of CODcr,TP,NH3-N and TN in rainwater by sponge facilities reached 67％,67％,81％,and 72％respectively,which significantly controlled the pollution impact of rainwater runoff on receiving water bodies.The annual reductions of CODcr,TP,NH3-N,and TN in the effluent from the sewage treatment plant by ecological wetland are 6570kg,72kg,85kg,and 530kg respectively,effectively reducing the pollutant discharge of the effluent from the sewage plan.A new model of sponge city construction was successfully created according to conditions of Canal Towns in South of the Yangtze.
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