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[Coagulation-flocculation performances for cuttlefish effluents treatment]
1Laboratoire des Sciences de Matériaux et Environnement, Faculté des Sciences de Sfax BP 759 Route de Soukra Km 4, 3000 Sfax, Tunisia.
Environmental Technology
|January 22, 2004
Summary
This study optimized coagulation-flocculation for cuttlefish effluent treatment. Using aluminium sulphate with MgO and PDMAC significantly reduced turbidity and chemical oxygen demand (COD).
Area of Science:
- Environmental Science
- Water Treatment Engineering
- Chemical Engineering
Background:
- Cuttlefish effluents contain colloidal particles that increase turbidity and chemical oxygen demand (COD).
- Effective treatment is crucial to mitigate the environmental impact of seafood processing waste.
Purpose of the Study:
- To investigate the coagulation-flocculation process for reducing turbidity and COD in cuttlefish effluents.
- To optimize the use of aluminium sulphate (SA) in conjunction with flocculants like starch, SiO2, MgO, and poly dimethyl ammonium chloride (PDMAC).
Main Methods:
- Investigated kinetic aspects, adsorption equilibrium, pH, and conductivity.
- Evaluated the performance of organic polymers (starch, PDMAC) versus salt alone as flocculants.
- Determined optimal SA quantities and coagulation conditions.
Main Results:
- Organic polymer flocculants improved performance, reducing SA consumption by 50%.
- Achieved a 90% removal rate for COD and a turbidity of 7 NTU.
- Optimal conditions involved 165.5 mg/L SA, 750 mg/L MgO, and 35 mg/L PDMAC (400,000 molecular weight).
Conclusions:
- Combined use of aluminium sulphate, MgO, and PDMAC is highly effective for treating cuttlefish effluent.
- Organic polymers enhance coagulation efficiency and reduce chemical requirements.
- The optimized process offers a sustainable solution for industrial wastewater management.