The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 2021
Filed:
Aug. 18, 2020
Sun Yat-sen University, Guangdong, CN;
Shenzhen Lisai Industry Development Co., Ltd., Guangdong, CN;
Shenzhen Research Institute of Sun Yat-sen University, Guangdong, CN;
Hui Lu, Guangdong, CN;
Xingxing Diao, Guangdong, CN;
Hequ Peng, Guangdong, CN;
Shijun Liu, Guangdong, CN;
Qing Zhao, Guangdong, CN;
Liao Meng, Guangdong, CN;
Naiqiao Song, Guangdong, CN;
SUN YAT-SEN UNIVERSITY, Guangzhou, CN;
SHENZHEN LISAI INDUSTRY DEVELOPMENT CO., LTD, Shenzhen, CN;
Shenzhen Research Institute of Sun Yat-sen Univ., Shenzhen, CN;
Abstract
An advanced nitrogen removal method using partial nitrification-denitrification coupled two-stage autotrophic denitrification. Sewage is introduced into a first pool for partial nitrification-denitrification treatment, and then introduced into a first regulating reservoir. Dissolved oxygen content in the first pool is kept at 0.4-0.6 mg/L. Water is discharged when a molar ratio of nitrite nitrogen to ammonia nitrogen in the first regulating reservoir is 1.0-1.3:1. Effluent in the regulating reservoir is introduced into a second pool for anaerobic ammonia oxidation treatment, and then introduced into a second regulating reservoir. In the second pool, pH is 7.0-7.4, a temperature is 22-28° C. Effluent in the second regulating reservoir and sulfides are introduced into a third pool for denitrification treatment. Water is discharged. In the third pool, pH is 7.5-8.0, a temperature is 28-32° C., a mass ratio of sulfur to nitrogen is 1.9-2.0:1.