Double-layer artificial wetland system for strengthening sewage denitrification and dephosphorization and operation method thereof
A constructed wetland system, nitrogen and phosphorus removal technology, applied in the field of sewage treatment, can solve the problems of secondary pollution, increased investment cost, insufficient oxygen supply, etc., and achieve the effects of reduced land occupation, easy operation and maintenance, and simple process flow
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[0044] refer to figure 1 and figure 2
[0045] The invention provides a double-layer constructed wetland system for strengthening sewage denitrification and dephosphorization, the structure of which is as follows figure 1 As shown, it includes the upper wetland I, the lower wetland II placed inside the pool body 1, the water inlet distribution system and the effluent collection system that provide water for the upper wetland I and the lower wetland II, and the effluent collection system of the effluent collection system The pipe 7 is placed at the bottom of the lower wetland II, the upper wetland I is filled with mineral fillers 14 whose main purpose is to remove suspended solids, organic matter, ammonia nitrogen and phosphorus, and the lower wetland II is filled with organisms that are conducive to the growth of microorganisms and whose main purpose is to remove total nitrogen. filler13. Among them, the mineral filler 14 in the upper wetland is a mixture of limestone and ...
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