US 2025/0074804 A1 · METHOD AND APPARATUS FOR TREATING WASTEWATER

Abstract

The method for treating wastewater includes a first flocculation-and-sedimentation process and a second flocculation-and-sedimentation process, wherein the first flocculation-and-sedimentation process include: passing wastewater through a first flocculation reaction tank; passing the first treated water through a third flocculation reaction tank; passing the third treated water through a fourth flocculation reaction tank; and passing the fourth treated water through a first sedimentation tank to generate fifth treated water and sludge, and the second flocculation-and-sedimentation process include: passing the fifth treated water through a fifth flocculation reaction tank to generate sixth treated water; passing the sixth treated water through a sixth flocculation reaction tank to generate sixth treated water; passing the sixth treated water through a seventh flocculation reaction tank to generate eighth treated water; and passing the eighth treated water through a second sedimentation tank to generate ninth treated water and sludge.

Claims21

Dependent claims

A method for treating wastewater, the method comprising:

a first flocculation-and-sedimentation process and a second flocculation-and-sedimentation process that are carried out continuously, wherein
the first flocculation-and-sedimentation process comprises the steps of:
(S10-2) passing wastewater containing at least fluorine and phosphorus through a first flocculation reaction tank to generate first treated water;
(S10-4) passing the first treated water through a third flocculation reaction tank to generate third treated water;
(S10-6) passing the third treated water through a fourth flocculation reaction tank to generate fourth treated water;
and
(S10-8) passing the fourth treated water through a first sedimentation tank to generate fifth treated water and sludge, and
the second flocculation-and-sedimentation process comprises the steps of:
(S20-2) passing the fifth treated water through a fifth flocculation reaction tank to generate sixth treated water;
(S20-4) passing the sixth treated water through a seventh flocculation reaction tank to generate eighth treated water;
and
(S20-6) passing the eighth treated water through a second sedimentation tank to generate ninth treated water and sludge.

9 more elements

An apparatus for treating wastewater, comprising:

a first flocculation-and-sedimentation unit and a second flocculation-and-sedimentation unit that are connected in series with each other,
wherein the first flocculation-and-sedimentation unit comprises:
a first flocculation reaction tank configured to partially flocculate wastewater containing at least fluorine and phosphorus to generate first treated water;
a third flocculation reaction tank configured to additionally partially flocculate the first treated water to generate third treated water;
a fourth flocculation reaction tank configured to additionally partially flocculate the third treated water to generate fourth treated water;
and
a first sedimentation tank configured to partially sediment the fourth treated water to generate fifth treated water and sludge, and
the second flocculation-and-sedimentation unit comprises:
a fifth flocculation reaction tank configured to additionally partially flocculate the fifth treated water to generate sixth treated water;
a seventh flocculation reaction tank configured to additionally partially flocculate the sixth treated water to generate eighth treated water;
and
a second sedimentation tank configured to partially sediment the eighth treated water to generate ninth treated water and sludge.

9 more elements

Dependencies are inferred from the claim text.

Method and apparatus for treating wastewater

Life of this patent

Method and apparatus for treating wastewater

Life of this patent

Abstract

Claims21