公开(公告)号：US11332392B2

公开(公告)日：2022-05-17

申请号：US16305959

申请日：2017-05-25

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Frank L. Sassaman, Jr. ,  David L. Berger ,  Stanley R. Karrs

IPC: C02F1/52 ,  C01B15/01 ,  C02F1/66 ,  C02F1/72 ,  C02F1/28 ,  C02F1/70 ,  C02F9/00 ,  C02F1/24 ,  C02F101/34 ,  C02F1/44 ,  C02F101/10 ,  C02F103/34 ,  C01B15/013 ,  C02F1/58

Abstract: A method of reducing a concentration of hydrogen peroxide from wastewater includes diluting the wastewater with water having a lower concentration of hydrogen peroxide than the wastewater to produce a diluted wastewater, contacting the diluted wastewater with a dissolved iron compound at an acidic pH to form a partially treated wastewater having a lower concentration of hydrogen peroxide than the diluted wastewater, and precipitating iron solids from the partially treated wastewater by raising a pH of the partially treated wastewater to form a neutralized partially treated wastewater.

公开(公告)号：US20190127247A1

公开(公告)日：2019-05-02

申请号：US16305959

申请日：2017-05-25

Applicant: Evoqua Water Technologies LLC

Inventor： Frank L. Sassaman, JR. ,  David L. Berger ,  Stanley r. Karrs

IPC: C02F1/52 ,  C02F1/44 ,  C02F1/70 ,  C02F1/72 ,  C02F9/00

Abstract: A method of reducing a concentration of hydrogen peroxide from wastewater includes diluting the wastewater with water having a lower concentration of hydrogen peroxide than the wastewater to produce a diluted wastewater, contacting the diluted wastewater with a dissolved iron compound at an acidic pH to form a partially treated wastewater having a lower concentration of hydrogen peroxide than the diluted wastewater, and precipitating iron solids from the partially treated wastewater by raising a pH of the partially treated wastewater to form a neutralized partially treated wastewater.