公开(公告)号：US11718549B2

公开(公告)日：2023-08-08

申请号：US17799951

申请日：2021-04-13

Applicant: TSINGHUA UNIVERSITY

Inventor： Wenjun Sun ,  Jingdong Shi

IPC: C02F9/00 ,  C02F1/00 ,  C02F1/28 ,  C02F1/32 ,  C02F1/44 ,  C02F1/78

CPC classification number: C02F9/00 ,  C02F1/008 ,  C02F1/283 ,  C02F1/32 ,  C02F1/444 ,  C02F1/78 ,  C02F1/004 ,  C02F2201/32 ,  C02F2201/782 ,  C02F2209/003 ,  C02F2209/005 ,  C02F2209/02 ,  C02F2209/03 ,  C02F2209/05 ,  C02F2209/06 ,  C02F2209/10 ,  C02F2209/23 ,  C02F2209/29 ,  C02F2209/36 ,  C02F2209/40 ,  C02F2209/42 ,  C02F2301/046 ,  C02F2301/08 ,  C02F2303/18

Abstract: A water treatment system comprises a flow path through a first activated carbon filter, a second activated carbon filter downstream of the first activated carbon filter, a particulate filter downstream of the second activated carbon filter, for example a ceramic membrane, and a UV sterilizer downstream of the particulate filter. Ozone is introduced into the process water ahead of a water storage vessel for storing treated water produced by the system. A recycle subsystem is periodically operated to withdraw treated water from the water storage vessel to form recycled water, introduce the recycled water to the water lines upstream of the UV sterilizer, and return the recycled water to the water storage vessel. A main programmable logic controller (PLC) controls a flow of the process water through the water treatment system and controls the recycle subsystem.