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Related Experiment Videos

Improvement of coagulation-flocculation process using anionic polyacrylamide as coagulant aid.

M I Aguilar1, J Sáez, M Lloréns

  • 1Department of Chemical Engineering, University of Murcia Campus, Espinardo, 30071 Murcia, Spain. maguilar@um.es

Chemosphere
|November 4, 2004
PubMed
Summary

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Anionic polyacrylamide enhanced slaughterhouse wastewater treatment by improving floc settling speed when combined with ferric sulphate or polyaluminium chloride, optimizing physicochemical processes.

Area of Science:

  • Environmental Engineering
  • Water Treatment Technologies
  • Chemical Engineering

Background:

  • Slaughterhouse wastewater presents significant treatment challenges due to high organic load and suspended solids.
  • Physicochemical treatment, specifically coagulation-flocculation, is a common method for treating such effluents.
  • Optimizing coagulant aid and process parameters is crucial for efficient removal of pollutants.

Purpose of the Study:

  • To evaluate the effectiveness of anionic polyacrylamide as a coagulant aid in slaughterhouse wastewater treatment.
  • To determine the optimal conditions (pH, dosage, stirring) for coagulation-flocculation using ferric sulphate, aluminium sulphate, and polyaluminium chloride.
  • To assess the impact of anionic polyacrylamide on floc settling velocity and pollutant removal.

Main Methods:

Related Experiment Videos

  • Coagulation-flocculation experiments were conducted on slaughterhouse wastewater.
  • Anionic polyacrylamide was used as a coagulant aid with ferric sulphate, aluminium sulphate, and polyaluminium chloride.
  • Process parameters including pH, coagulant/aid dosage, stirring speed, and time were optimized.
  • Key parameters monitored included chemical oxygen demand (COD), biochemical oxygen demand (BOD5), total suspended solids (TSS), particle size, nutrient levels, and residual metal concentrations.

Main Results:

  • Anionic polyacrylamide significantly increased floc settling velocity when used with ferric sulphate or polyaluminium chloride.
  • Optimal pH, coagulant, and coagulant aid doses were determined for efficient treatment.
  • The study successfully optimized the coagulation-flocculation process for slaughterhouse wastewater.
  • Measurements of particle number and size, sludge volume, nutrients, and residual metals provided a comprehensive assessment.

Conclusions:

  • Anionic polyacrylamide is an effective coagulant aid for enhancing the settling characteristics of flocs in slaughterhouse wastewater treatment.
  • The combination of anionic polyacrylamide with ferric sulphate or polyaluminium chloride offers a promising approach for improving the efficiency of physicochemical wastewater treatment.
  • Optimization of process parameters is essential for maximizing pollutant removal and achieving desired water quality.