US 2016/0101999 A1Published application

Method of treating suspended solids and heavy metal ions in sewage

AssigneeInstitute of Nuclear Energy Research Atomic Energy Council, Executive Yuan

InventorsCHUN-PING HUANG, YI-JING LI, YEN-NUNG LAI

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Abstract

A method of treating suspended solids and heavy metal ions in sewage includes (step 1) adding an iron sulfate reagent to a portion of sewage to be treated such that suspended solids therein undergo preliminary precipitation, and then separating the portion of sewage into primarily treated sewage with low turbidity and low density sludge (LDS); (step 2) filling a tank with the LDS, wherein the tank comprises a first inlet and a first outlet above the first inlet; and (step 3) conveying the other portion of sewage to be treated or the preliminarily treated sewage to the tank through the first inlet such that the sewage percolates though the LDS in the tank to fluidize the LDS and bind the suspended solid to the LDS, and in consequence, after percolating through the sludge, the treated sewage exits the tank through the outlet effluent.

Claims11

Dependent claims

A method of treating suspended solids and heavy metal ions in sewage, the method comprising the steps of:

step 1:
introducing an iron sulfate reagent to a portion of sewage to be treated, such that suspended solids in the sewage undergo preliminary precipitation, followed by separating the sewage preliminarily into primarily treated sewage with low turbidity and low density sludge (LDS);
step 2:
filling a tank with the LDS, wherein the tank comprises a first inlet and a first outlet above the first inlet;
and
step 3:
introducing another portion of the sewage to be treated or the primarily treated sewage to the first inlet to allow the another portion of the sewage to be treated or the primarily treated sewage to percolate through the LDS in the tank and thus fluidize the LDS, such that suspended solids in the sewage bind with the LDS bind, and the treated sewage having percolated through the LDS exits the first outlet.

4 more elements

Dependencies are inferred from the claim text.