Investigation of Heavy Metal Effects on the Anaerobic Co-Digestion Process of Waste Activated Sludge and Septic Tank Sludge
Joint Authors
Nguyen, Quang-Minh
Bui, Duy-Cam
Phuong, Thao
Doan, Van-Huong
Nguyen, Thi-Nham
Nguyen, Minh-Viet
Tran, Thien-Hien
Do, Quang-Trung
Source
International Journal of Chemical Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-12-01
Country of Publication
Egypt
No. of Pages
9
Abstract EN
The effect of copper, zinc, chromium, and lead on the anaerobic co-digestion of waste activated sludge and septic tank sludge in Hanoi was studied in the fermentation tests by investigating the substrate degradation, biogas production, and process stability at the mesophilic fermentation.
The tested heavy metals were in a range of concentrations between 19 and 80 ppm.
After the anaerobic tests, the TS, VS, and COD removal efficiency was 4.12%, 9.01%, and 23.78% for the Cu(II) added sample.
Similarly, the efficiencies of the Zn(II) sample were 1.71%, 13.87%, and 16.1% and Cr(VI) efficiencies were 15.28%, 6.6%, and 18.65%, while the TS, VS, and COD removal efficiency of the Pb(II) added sample was recorded at 16.1%, 17.66%, and 16.03% at the concentration of 80 ppm, respectively.
Therefore, the biogas yield also decreased by 36.33%, 31.64%, 31.64%, and 30.60% for Cu(II), Zn(II), Cr(VI), and Pb(II) at the concentration of 80 ppm, compared to the raw sample, respectively.
These results indicated that Cu(II) had more inhibiting effect on the anaerobic digestion of the sludge mixture than Zn(II), Cr(VI), and Pb(II).
The relative toxicity of these heavy metals to the co-digestion process was as follows: Cu (the most toxic) > Zn > Cr > Pb (the least toxic).
The anaerobic co-digestion process was inhibited at high heavy metal concentration, which resulted in decreased removal of organic substances and produced biogas.
American Psychological Association (APA)
Nguyen, Quang-Minh& Bui, Duy-Cam& Phuong, Thao& Doan, Van-Huong& Nguyen, Thi-Nham& Nguyen, Minh-Viet…[et al.]. 2019. Investigation of Heavy Metal Effects on the Anaerobic Co-Digestion Process of Waste Activated Sludge and Septic Tank Sludge. International Journal of Chemical Engineering،Vol. 2019, no. 2019, pp.1-9.
https://search.emarefa.net/detail/BIM-1158674
Modern Language Association (MLA)
Nguyen, Quang-Minh…[et al.]. Investigation of Heavy Metal Effects on the Anaerobic Co-Digestion Process of Waste Activated Sludge and Septic Tank Sludge. International Journal of Chemical Engineering No. 2019 (2019), pp.1-9.
https://search.emarefa.net/detail/BIM-1158674
American Medical Association (AMA)
Nguyen, Quang-Minh& Bui, Duy-Cam& Phuong, Thao& Doan, Van-Huong& Nguyen, Thi-Nham& Nguyen, Minh-Viet…[et al.]. Investigation of Heavy Metal Effects on the Anaerobic Co-Digestion Process of Waste Activated Sludge and Septic Tank Sludge. International Journal of Chemical Engineering. 2019. Vol. 2019, no. 2019, pp.1-9.
https://search.emarefa.net/detail/BIM-1158674
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1158674