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Patents Grants
last 30 patents
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Patent Grant
Anaerobic ammoxidation synergistic nitrogen removal process device...
Patent number
11,339,069
Issue date
May 24, 2022
BEIJING DRAINAGE GROUP CO., LTD
Xiaoyu Han
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Patents Applications
last 30 patents
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Patent Application
A sewage treatment system and method of continuous flow step-feed s...
Publication number
20230264994
Publication date
Aug 24, 2023
BEIJING DRAINAGE GROUP CO ., LTD
Shujun ZHANG
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Application
ANAEROBIC AMMOXIDATION SYNERGISTIC NITROGEN REMOVAL PROCESS DEVICE...
Publication number
20200354247
Publication date
Nov 12, 2020
BEIJING DRAINAGE GROUP CO ., LTD
Xiaoyu HAN
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE