The present invention relates to a
system and a treatment method for treating high-
phosphorus wastewater and resourcefully utilizing
phosphorus elements. The
system includes a bipolar membrane
electrodialysis device, a
phosphorus precipitator, and a membrane treatment device. Inside the bipolar membrane
electrodialysis device, there are successively arranged a
cathode, a first bipolar membrane, a main cation exchange membrane, a main anion exchange membrane, a second bipolar membrane, and an
anode. Between the first bipolar membrane and the main cation exchange membrane is an alkali chamber, between the main cation exchange membrane and the main anion exchange membrane is a
wastewater chamber, between the main anion exchange membrane and the second bipolar membrane is an acid chamber, the outside of the first bipolar membrane is a
cathode chamber, and the outside of the second bipolar membrane is an
anode chamber; the high-phosphorus
wastewater is input into the wastewater chamber, the acid chamber is provided with a
phosphoric acid recovery pipe, and the alkali chamber and the wastewater chamber are respectively connected to the phosphorus precipitator through an alkali liquid
pipe and a first
water production pipe; the phosphorus precipitator is provided with a precipitant inlet for inputting a
calcium precipitant or a
magnesium precipitant, the concentrated water outlet of the membrane treatment device is connected to the wastewater chamber, and the
produced water of the membrane treatment device is reused as
reclaimed water.