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- Title
Evaluation conditions to treat slime water with coagulant-bioflocculant by orthogonal design.
- Authors
Yu Kang; Cheng Peng; Fengyuan Zhang; Jie Xing; Lixin Li; Fang Ma; Yan Liu
- Abstract
In this study, a new type of microbial flocculant combined with Polyaluminum 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.
- Subjects
CHEMICAL oxygen demand; FERRIC chloride; POLYALUMINUM chloride
- Publication
Tecnología y Ciencias del Agua, 2022, Vol 13, Issue 4, p341
- ISSN
0187-8336
- Publication type
Article
- DOI
10.24850/j-tyca-2022-04-07