Side stream treatment for overflow

Patent metadata

Field	Value
Publication number	US-11753322-B2
Application number	US-202016862870-A
Country	US
Kind code	B2
Filing date	Apr 30, 2020
Priority date	Jun 25, 2014
Publication date	Sep 12, 2023
Grant date	Sep 12, 2023

Abstract

A system and method of treating wastewater. In one embodiment, the system comprises a biological reactor fluidly connected to a source of wastewater and having a treated wastewater outlet, a fixed film biological reactor connected to the source of wastewater and having a fixed film effluent outlet, and a ballasted system fluidly connected to the fixed film effluent outlet. The ballasted system may comprise a ballast reactor tank configured to provide a ballasted effluent, and a source of ballast material fluidly connected to an inlet of the ballast reactor tank. The system may further comprise a bypass line having an inlet fluidly connected to the source of wastewater, a first outlet fluidly connected to the ballasted system, and a second outlet fluidly connected to the fixed film biological reactor, the bypass line configured to bypass the fixed film biological reactor.

First claim

The invention claimed is:

1. A system for treating wastewater, comprising:
a first biological reactor fluidly connected to a source of wastewater and having a treated wastewater outlet, further comprising a first clarifier fluidly connected to the treated wastewater outlet and configured to provide a first treated effluent;
a second biological reactor being a fixed film biological reactor connected to the source of wastewater and having a fixed film effluent outlet;
a ballasted system fluidly connected to the fixed film effluent outlet, the ballasted system comprising:
a ballast reactor tank configured to provide a ballasted effluent; and
a source of ballast material fluidly connected to an inlet of the ballast reactor tank; and
a bypass line having an inlet fluidly connected to the source of wastewater, a first outlet fluidly connected to the ballasted system, and a second outlet fluidly connected to the fixed film biological reactor, the bypass line configured to bypass the fixed film biological reactor.

2. The system of claim 1 , wherein the ballast material is magnetic.

3. The system of claim 2 , wherein the ballast material is magnetite.

4. The system of claim 1 , further comprising a source of flocculant fluidly connected to an inlet of the ballast reactor tank.

5. The system of claim 1 , further comprising a source of coagulant fluidly connected to an inlet of the ballast reactor tank.

6. The system of claim 1 , wherein the second treated effluent comprises about 100 mg/l to about 500 mg/l of biological solids.

7. The system of claim 1 , further comprising a second clarifier fluidly connected to an outlet of the ballast reactor tank, the second clarifier comprising a second treated effluent outlet and a ballasted solids outlet and configured to separate the ballasted effluent into a second treated effluent from a ballasted solids portion.

8. The system of claim 1 , wherein the fixed film biological reactor comprises a carrier onto which biomass is fixed.

Assignees

• Evoqua Water Tech Llc

Inventors

• Pino Jelcic Sergio

Classifications

• C02F3/006 Primary

  Regulation methods for biological treatment · CPC title

• C02F3/06 Primary

  using submerged filters · CPC title

• C02F3/04

  using trickle filters · CPC title

• C02F3/082

  Rotating biological contactors · CPC title

• C02F3/085

  Fluidized beds · CPC title