Sun Yat-senuniversity

Shenzhen Lisai Industry Development Co., Ltd

Shenzhen Research Institute of Sun Yat-sen Univ.

Xingxing Diao

Shijun Liu

Hui Lu

Qing Zhao

Hequ Peng

Liao Meng

Naiqiao Song

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&#xb0; 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&#xb0; C., a mass ratio of sulfur to nitrogen is 1.9-2.0:1.

Partial nitrification-denitrification coupled two-stage autotrophic denitrification advanced nitrogen removal method

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Guangdong, China

Xingxing Diao