Low-oxygen method of wastewater treatment with effective nutrients removal

21st International Scientific Conference on Advanced in Civil Engineering "Construction - The Formation of Living Environment"

土木建筑工程

Gulshin, Igor^1 ; Gogina, Elena^1

Moscow State University of Civil Engineering, Yaroslavskoye Shosse, 26, Moscow

129337, Russia^1

关键词: Artificial wastewater;    Concentration of dissolved oxygen;    Full-scale experiment;    Hydraulic regimes;    Laboratory experiments;    Municipal wastewater treatment;    Organic substrate;    Recirculation index;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/365/2/022032/pdf
DOI  :  10.1088/1757-899X/365/2/022032

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The paper presents the results of the research of energy efficient municipal wastewater treatment technology for oxidation ditches. The research includes laboratory experiments with the lab-scale models of oxidation diches and artificial wastewater and full-scale experiments with real wastewater. The lab-scale models allowed to model hydraulic regimes of different types of oxidation ditches. As a result of experiments, it has been proved the possibility of wastewater treatment with an effective nitrogen removal in the oxidation ditches at reduced concentrations of dissolved oxygen (0.5-0.6 mg/L) with extremely low organic loads and inner recirculation index about 450% (with average flow speed about 0.2 m/s). The design of the oxidation ditches makes it possible to achieve effective wastewater treatment from nitrogen compounds with a reduced amount of organic substrate and a concentration of dissolved oxygen. The operating recommendations for these types of bioreactors have been compiled.