Achieving enhanced biological nitrogen removal via 2450 MHz electromagnetic wave loading on returned sludge in anaerobic-anoxic-oxic process | Zendy

Wenjiao Sang | Zendy; Dong Li | Zendy; Qian Zhang | Zendy; Longjie Mei | Zendy; Shiwen Hao | Zendy; Yijie Feng | Zendy; Jin Xi | Zendy; Cuihua Li | Zendy; Yangyang Feng | Zendy; Rajendra Prasad Singh | Zendy

Open Access

Achieving enhanced biological nitrogen removal via 2450 MHz electromagnetic wave loading on returned sludge in anaerobic-anoxic-oxic process

Author(s) -

Wenjiao Sang,

Dong Li,

Qian Zhang,

Longjie Mei,

Shiwen Hao,

Yijie Feng,

Jin Xi,

Cuihua Li,

Yangyang Feng,

Rajendra Prasad Singh

Publication year - 2020

Publication title -

water science and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.406

H-Index - 137

eISSN - 1996-9732

pISSN - 0273-1223

DOI - 10.2166/wst.2020.328

Subject(s) - anoxic waters , denitrifying bacteria , denitrification , activated sludge , chemistry , nitrogen , environmental chemistry , enhanced biological phosphorus removal , pulp and paper industry , pollutant , environmental engineering , sewage treatment , environmental science , organic chemistry , engineering

To evaluate the enhancing of the biological nitrogen removal effectiveness by electromagnetic wave loading on returned sludge in the A/A/O reactor, some experiments were completed with the returned sludge loaded by 2,450 MHz electromagnetic wave. The excess sludge yield and pollutant removal effect of the system were evaluated. Results showed that stronger denitrification effect and less sludge yield were achieved. When 30% of the returned sludge was loaded by electromagnetic wave, the actual denitrification efficiency increased by 7% without dosage. The dissolution of carbon, nitrogen and phosphorus from loaded returned sludge was detected, thus providing the system with a supplemental carbon source of 4.6 g/d SCOD. The specific oxygen uptake rate of the oxic activated sludge increased by 14%, and the denitrification rate of the anoxic activated sludge increased by 29%. Illumina MiSeq analysis showed that the microbial richness increased obviously, and denitrifying bacteria (i.e. Dechloromonas, Zoogloea and Azospira, etc.) were accumulated.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research