Polystyrene composite system: An alternative for wastewater treatment

Area of Science:

• Environmental Engineering
• Water Treatment Technologies
• Materials Science

Background:

• Growing populations exacerbate water scarcity, necessitating advanced water purification methods.
• Polystyrene's porous structure makes it a promising material for retaining impurities in polluted water.
• Conventional treatment methods like reverse osmosis and membrane filtration are crucial but can be resource-intensive.

Purpose of the Study:

• To evaluate the efficacy of a tubular reactor with a mixed polystyrene bed for wastewater treatment.
• To optimize the polystyrene filter system's performance for pollutant removal.
• To assess the treated water's suitability for irrigation based on established standards.

Main Methods:

• A two-phase study involving system optimization and performance evaluation.
• Testing with varying polystyrene particle sizes, flow rates (0.5-1 L/min), and residence times (180-360 min).
• Operation in dead-end mode and series configuration without recirculation.

Main Results:

• Phase I optimization achieved 55% removal of Escherichia coli and turbidity, insufficient for potable water.
• Phase II demonstrated high removal efficiencies for chemical oxygen demand (78.26%), total phosphorus (75%), and nitrates (73.42%).
• 98.32% deactivation of E. coli was achieved, meeting CONAMA Class 2 and 3 irrigation standards.

Conclusions:

• The polystyrene filter system shows significant potential for wastewater treatment, particularly for irrigation purposes.
• Further optimization may be needed to meet drinking water standards.
• Polystyrene filtration offers a cost-effective approach to water resource management and pollution control.