This study investigated the efficiency of an organic tannin polymer alone or amended with polyacrylamide to harvest Chlorella vulgaris biomass grown in a laboratory-scale photobioreactor treating swine wastewater digestate. The effect of biomass concentration, tannin (TAN) dosages and changes in pH were evaluated in jar test experiments. Among the TAN concentrations tested (11, 22, 44, 89, 178 mg L−1), 11 mg L−1 showed the highest biomass recovery (97%). The highest coagulation/ flocculation efficiencies were obtained at pH 5 to 7. Flocculation efficiency improved from 50 to 97% concomitant with the increasing biomass concentrations from 45 to 165 mg L−1, respectively. Recovery efficiencies above 95% were achieved with the same TAN dosage (11 mg L−1) irrespective of the concentration of organic carbon present (75 to 300 mg TOC L−1). Overall, the results suggest that TAN could become an interesting alternative choice of non-toxic organic polymer for harvesting Chlorella sp. from organic-rich wastewater.
Skip Nav Destination
Article navigation
Research Article|
July 05 2014
Assessment of a tannin-based organic polymer to harvest Chlorella vulgaris biomass from swine wastewater digestate phycoremediation Available to Purchase
M. P. Mezzari;
1Federal University of Santa Catarina, Department of Chemical Engineering, 88034-001 Florianópolis, SC, Brazil
E-mail: [email protected]
Search for other works by this author on:
M. L. B. da Silva;
M. L. B. da Silva
2Embrapa Swine and Poultry, 89700-000 Concórdia, SC, Brazil
Search for other works by this author on:
M. Pirolli;
M. Pirolli
3West University of Santa Catarina, Biotechnological Nucleus, 89560-000, Videira, SC, Brazil
Search for other works by this author on:
S. Perazzoli;
S. Perazzoli
1Federal University of Santa Catarina, Department of Chemical Engineering, 88034-001 Florianópolis, SC, Brazil
Search for other works by this author on:
R. L. R. Steinmetz;
R. L. R. Steinmetz
1Federal University of Santa Catarina, Department of Chemical Engineering, 88034-001 Florianópolis, SC, Brazil
2Embrapa Swine and Poultry, 89700-000 Concórdia, SC, Brazil
Search for other works by this author on:
E. O. Nunes;
E. O. Nunes
3West University of Santa Catarina, Biotechnological Nucleus, 89560-000, Videira, SC, Brazil
Search for other works by this author on:
H. M. Soares
H. M. Soares
1Federal University of Santa Catarina, Department of Chemical Engineering, 88034-001 Florianópolis, SC, Brazil
Search for other works by this author on:
Water Sci Technol (2014) 70 (5): 888–894.
Article history
Received:
March 18 2014
Accepted:
June 25 2014
Citation
M. P. Mezzari, M. L. B. da Silva, M. Pirolli, S. Perazzoli, R. L. R. Steinmetz, E. O. Nunes, H. M. Soares; Assessment of a tannin-based organic polymer to harvest Chlorella vulgaris biomass from swine wastewater digestate phycoremediation. Water Sci Technol 1 September 2014; 70 (5): 888–894. doi: https://doi.org/10.2166/wst.2014.307
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
eBook
Pay-Per-View Access
$38.00