Generalities
35
• Extensive processes such as lagooning.
• Intensive physico-chemical processes such as disinfection with chlorine, peracetic acid,
UV and O3 (Grosclaude, 1999).
1.2.2.1.6. Sludge treatment
The biological or physico-chemical treatments used during wastewater treatment
generate a significant production of diluted sludge containing fermentable organic
matter. Conventional sludge treatment using digestion typically follows these steps is
series: Thickening, anaerobic digestion and dewatering before biogas monetisation and
biosolids reuse or disposal.
Sludge treatment has two main objectives:
• Stabilization of organic matter to prevent uncontrolled fermentation, which would lead
to odor nuisance.
• Eliminate as much water as possible to reduce the volume of sludge to be evacuated.
(Groslaude, 1999).
Conclusion
Microalgae’s significance extends beyond the microscopic scale, as they have far-reaching
implications for the environment, industries and human well-being.
Wastewater are cleared of their largest waste, during the pre-treatments, down to the smallest
pollutants, during tertiary treatments. Secondary treatments using activated sludge is the most
frequently used treatment in Algeria, but this news won’t prevent us from saying that this
method presents several disadvanteg which can be reduced by the use of new technique
presented by the application of microalgae in wastewater treatement, wich have shown their
effectiveness according to several studies.
Methodology of work
In order yo apply microalgae in wastewater treatment; we have done a thorough study of
wastewater treatment and facilities used during this process. The working methodology we
have adopted to complete this research assignment, including visits made, are resumed in the
following steps:
35
• Extensive processes such as lagooning.
• Intensive physico-chemical processes such as disinfection with chlorine, peracetic acid,
UV and O3 (Grosclaude, 1999).
1.2.2.1.6. Sludge treatment
The biological or physico-chemical treatments used during wastewater treatment
generate a significant production of diluted sludge containing fermentable organic
matter. Conventional sludge treatment using digestion typically follows these steps is
series: Thickening, anaerobic digestion and dewatering before biogas monetisation and
biosolids reuse or disposal.
Sludge treatment has two main objectives:
• Stabilization of organic matter to prevent uncontrolled fermentation, which would lead
to odor nuisance.
• Eliminate as much water as possible to reduce the volume of sludge to be evacuated.
(Groslaude, 1999).
Conclusion
Microalgae’s significance extends beyond the microscopic scale, as they have far-reaching
implications for the environment, industries and human well-being.
Wastewater are cleared of their largest waste, during the pre-treatments, down to the smallest
pollutants, during tertiary treatments. Secondary treatments using activated sludge is the most
frequently used treatment in Algeria, but this news won’t prevent us from saying that this
method presents several disadvanteg which can be reduced by the use of new technique
presented by the application of microalgae in wastewater treatement, wich have shown their
effectiveness according to several studies.
Methodology of work
In order yo apply microalgae in wastewater treatment; we have done a thorough study of
wastewater treatment and facilities used during this process. The working methodology we
have adopted to complete this research assignment, including visits made, are resumed in the
following steps: