Treatment of wastewater from Azilal (Morocco) using microalgae: comparing indoor and outdoor cultures and biomass harvesting by coagulation–flocculation

In this study, native microalgae cultivated in the batch mode were used to purify secondary municipal wastewater (MW) from Azilal (Morocco) at different concentrations; the treatment of the MW under laboratory conditions and natural conditions was compared. The biomass produced was harvested by coag...

Full description

Saved in:
Bibliographic Details
Published in:Desalination and water treatment 2023-02, Vol.286, p.90-100
Main Authors: El Amri, Radouane, Elkacmi, Reda, Benadda, Belkacem, Kacem, Mariem, Hasib, Aziz, Boudouch, Otmane
Format: Article
Language:English
Subjects:
Ammonium removal
Chemical oxygen demand removal
Coagulation–flocculation
Environmental Sciences
Municipal wastewater
Native microalgae
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, native microalgae cultivated in the batch mode were used to purify secondary municipal wastewater (MW) from Azilal (Morocco) at different concentrations; the treatment of the MW under laboratory conditions and natural conditions was compared. The biomass produced was harvested by coagulation–flocculation–sedimentation. The results showed that the maximum biomass was obtained in outdoor cultures by 1.11 vs. 0.79 g·L–1 in indoor cultures. Ammonium removal reached 99.8% in indoor cultures and 97.5% in outdoor cultures. The highest chemical oxygen demand removal percentage was 60.3% in indoor cultures and 68.9% in outdoor cultures. Regarding biomass harvesting, 140 mg·L–1 of ferric chloride resulted in 97.4% of the biomass recovered in 20 min of sedimentation and improved the final effluent quality. Finally, these native microalgae showed a promising alternative for MW treatment combined with valuable biomass production.
ISSN:1944-3986
1944-3994
1944-3986
DOI:10.5004/dwt.2023.29316