Condiciones de evaluación para el tratamiento del agua de fango de carbón con coagulante-biofloculante por prueba ortogonal

Yu Kang; Cheng Peng; Fengyuan Zhang; Jie Xing; Lixin Li; Fang Ma; Yan Liu

doi:10.24850/j-tyca-2022-04-07

Autores/as

Yu Kang School of Safety Engineering, Heilongjiang University of Science and Technology, Harbin, China https://orcid.org/0000-0003-2449-3578
Cheng Peng School of Environment & Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, China https://orcid.org/0000-0003-2598-4504
Fengyuan Zhang School of Environment & Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, China https://orcid.org/0000-0003-2895-7544
Jie Xing Heilongjiang Provincial Research Academy of Environmental Sciences, Harbin, China https://orcid.org/0000-0002-8672-8996
Lixin Li School of Environment & Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, China/State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China https://orcid.org/0000-0003-2821-7108
Fang Ma State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China https://orcid.org/0000-0003-2618-9721
Yan Liu College of life science and technology, Harbin Normal University, Harbin, China https://orcid.org/0000-0001-8556-5040

DOI:

https://doi.org/10.24850/j-tyca-2022-04-07

Palabras clave:

Coal slime water, bioflocculant, single factor, orthogonal design

Resumen

In this study, a new type of microbial flocculant combined with Poly-aluminum ferric chloride (PAFC) coagulant was utilized in the coagulation-flocculation experiment of slime water. The removal effects of PAFC dosage, the bioflocculant dosage, and pH on the turbidity and Chemical Oxygen Demand (COD) of the coal slime water were investigated. The results illustrated that the best conditions for removing slime water turbidity and COD by single factor test were as follows: the dosage of PAFC was 37.5 mg/l, the dosage of bioflocculant was 0.75 mg/l, and the pH was 7.0. The most influential factors for turbidity and COD removal were identified through orthogonal test methodology as pH and PAFC dosage, respectively. The coagulation-flocculation of the best condition was a dosage of PAFC of 50.0 mg/l, the dosage of bioflocculant was 0.5 mg/l, and the pH was 7.0. Under this condition, the turbidity removal efficiency of 93.2 % and the COD removal efficiency of 47.2 % were obtained.