Tower type earthworm and ecological filter for treating sewage

The invention provides a tower angleworm biofilter and constructed wetland combined process comprising the following steps: firstly, wastewater enters into a hydrolysis-acidification pool and stabilizes after the action, and the water quantity is adjusted; secondly, domestic sewage in the hydrolysis-acidification pool is distributed into a hydrolysis-acidification pool for removing COD, total nitrogen, nitrogen-nitrogen, total phosphorus and pathogeny microbes; thirdly, the tail water in the step two enters into a constructed wetland to be subjected to strengthening treatment, thereby building a suitable waterfront surroundings landscape, or the tail water is recycled by serving as reclaimed water. The tower angleworm biofilter and constructed wetland combined process of the invention has the following advantages: firstly, the system hydraulic loading is high, and the surface hydraulic loading can reach 1m /m *d, thereby greatly saving land; secondly, under the high hydraulic loading, the total nitrogen removal rate of the system can reach more than 85 percent; the removal rates of other materials in the system are all more than 90 percent, the effluent reaches the primary standard of the national sewage comprehensive emission standard (GB8978-1996), and reaches the miscellaneous domestic water quality standard of the PRC construction standard (CJ25.1-89), thereby being able to be recycled by serving as the reclaimed water.