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High Flocculation of Coal Washing Wastewater Using a Novel Bioflocculant from Isaria cicadae GZU6722 Cover

High Flocculation of Coal Washing Wastewater Using a Novel Bioflocculant from Isaria cicadae GZU6722

Polish Journal of Microbiology
Volume 69 (2020): Issue 1 (March 2020)
By: XIAO ZOU,  JIALONG SUN,  JUAN LI,  YANLONG JIA,  TANGFU XIAO,  FANLI MENG,  MAOSHENG WANG and  ZENGPING NING  
Open Access
|Feb 2020

Figures & Tables

Fig. 1.

Purified IC-1 from Isaria cicadae GZU6722 and its main composition. A is purified bioflocculant, B is the bioflocculant suspension, and C indicates the main composition of the purified bioflocculant.
Purified IC-1 from Isaria cicadae GZU6722 and its main composition. A is purified bioflocculant, B is the bioflocculant suspension, and C indicates the main composition of the purified bioflocculant.

Fig. 2.

The flocculating performance under various conditions. (A) Different dosage of IC-1; (B) Different mixing time; (C) Different sedimentation time; (D) Different dosage of CaCl2 as a coagulant. Error bars indicate standard deviation of triplicate experiments. Significant differences among different treatments are indicated by lowercase (p < 0.05).
The flocculating performance under various conditions. (A) Different dosage of IC-1; (B) Different mixing time; (C) Different sedimentation time; (D) Different dosage of CaCl2 as a coagulant. Error bars indicate standard deviation of triplicate experiments. Significant differences among different treatments are indicated by lowercase (p < 0.05).

Fig. 3.

The flocculating efficiency of IC-1 and APAM at different dosages. Error bars indicate standard deviation of triplicate experiments. Significant differences among different treatments are indicated by lowercase (p < 0.05).
The flocculating efficiency of IC-1 and APAM at different dosages. Error bars indicate standard deviation of triplicate experiments. Significant differences among different treatments are indicated by lowercase (p < 0.05).

Fig. 4.

The flocculating process after the dosage of IC-1 and APAM. The comparisons between: (A) CK and APAM-assisted samples after 1 min of sedimentation; (B) CK and APAM-assisted samples after 5 min of sedimentation; (C) CK and IC-1-assisted samples after 1 min of sedimentation; (D) CK and IC-1-assisted samples after 5 min of sedimentation; and (E) the comparison among CK, IC-1-assisted, and APAM-assisted samples after 10 min of sedimentation. CK means a control check, i.e., the raw sample without adding any flocculant.
The flocculating process after the dosage of IC-1 and APAM. The comparisons between: (A) CK and APAM-assisted samples after 1 min of sedimentation; (B) CK and APAM-assisted samples after 5 min of sedimentation; (C) CK and IC-1-assisted samples after 1 min of sedimentation; (D) CK and IC-1-assisted samples after 5 min of sedimentation; and (E) the comparison among CK, IC-1-assisted, and APAM-assisted samples after 10 min of sedimentation. CK means a control check, i.e., the raw sample without adding any flocculant.

Fig. 5.

Microscopic images of the fine particles after addition of IC-1 and APAM. (A) CK (10 mm); (B) CK (10 μm); (C) IC-1 (10 mm); (D) IC-1 (10 μm); (E) APAM (10 mm); (F) APAM (10 μm). CK means a control check, i.e., the raw sample without adding any flocculant.
Microscopic images of the fine particles after addition of IC-1 and APAM. (A) CK (10 mm); (B) CK (10 μm); (C) IC-1 (10 mm); (D) IC-1 (10 μm); (E) APAM (10 mm); (F) APAM (10 μm). CK means a control check, i.e., the raw sample without adding any flocculant.

Flocculation performance of IC-1 compared with other microbial flocculants for the coal wastewater treatment_

BioflocculantOriginMaximum Flocculating EfficiencyAdditives
IC-1 Isaria cicadae GZU672295.8%2% CaCl2
POS412 Paenibacillus mucilaginosus WL41296.53% (Xu et al. 2017)
MBF-L918 Pseudomonas veronii L91895.51% (Liu et al. 2016)
A bioflocculant Azotobacter chroococcum 95.76% (Yang et al. 2019)50 mg/l CTAB

The estimated costs of APAM and IC-1 to treat 1 metric ton of coal washing wastewater at the same flocculating efficiency_

Cost/tDosage/g m−3 Cost per metric ton of wastewater
APAMUS$ 230060US$ 0.13
IC-1 a US$ 250024US$ 0.06
DOI: https://doi.org/10.33073/pjm-2020-008 | Journal eISSN: 2544-4646 | Journal ISSN: 1733-1331
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Language: English
Page range: 55 - 64
Submitted on: Nov 18, 2019
Accepted on: Jan 23, 2020
Published on: Feb 28, 2020
Published by: Polish Society of Microbiologists
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
coal washing wastewater,
bioflocculant,
APAM
Related subjects:
Life sciences,
Microbiology and virology

© 2020 XIAO ZOU, JIALONG SUN, JUAN LI, YANLONG JIA, TANGFU XIAO, FANLI MENG, MAOSHENG WANG, ZENGPING NING, published by Polish Society of Microbiologists
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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