Precise determination of the total nitrogen content in activated sludge by ultrasonic pre-treatment assisted wet method DOI
Shangjing Zeng, Peng Qi,

Shengshu Ai

et al.

Environmental Technology, Journal Year: 2023, Volume and Issue: 45(25), P. 5233 - 5243

Published: Nov. 21, 2023

The study proposed a method for determining total nitrogen (TN) content in activated sludge by ultrasound pre-treatment assisted wet method. Based on the single-factor experiment, with TN as response value, surface methodology was employed to examine individual and interactive effects of three factors: dilution multiple mixture, ultrasonic time, power. At same physico-chemical parameters digestion-oxidation were optimised. results indicated that optimal follows; 225 times, stirring rate 400 r/min, time 22 minutes, power 720 W, added volume potassium persulfate at 8 mL digestion 40 minutes. relative standard deviation (RSD) parallel determination samples using ≤2.77%, spike recovery 98.49-101.43%. method, determine concentration sludge, simpler operate, more accurate.

Language: Английский

Performance of carbon felt as cathodes in magnesium corrosion method to recover phosphate from swine wastewater DOI
Ying Xiang,

Weike Lin,

Jinfeng Wei

et al.

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 370, P. 123027 - 123027

Published: Oct. 24, 2024

Language: Английский

Citations

0
Precise determination of the total nitrogen content in activated sludge by ultrasonic pre-treatment assisted wet method DOI
Shangjing Zeng, Peng Qi,

Shengshu Ai

et al.

Environmental Technology, Journal Year: 2023, Volume and Issue: 45(25), P. 5233 - 5243

Published: Nov. 21, 2023

The study proposed a method for determining total nitrogen (TN) content in activated sludge by ultrasound pre-treatment assisted wet method. Based on the single-factor experiment, with TN as response value, surface methodology was employed to examine individual and interactive effects of three factors: dilution multiple mixture, ultrasonic time, power. At same physico-chemical parameters digestion-oxidation were optimised. results indicated that optimal follows; 225 times, stirring rate 400 r/min, time 22 minutes, power 720 W, added volume potassium persulfate at 8 mL digestion 40 minutes. relative standard deviation (RSD) parallel determination samples using ≤2.77%, spike recovery 98.49-101.43%. method, determine concentration sludge, simpler operate, more accurate.

Language: Английский

Citations

0