Dewatering behavior of sewage screenings
Waste Management (New York, N.Y.)
|February 5, 2013
Summary
Sewage screenings require better dewatering methods due to landfill bans. This study investigates their structure and water removal properties to improve wash press efficiency.
Area of Science:
- Environmental Engineering
- Water Treatment Technologies
Background:
- Increasing regulatory pressure in Germany prohibits landfilling of sewage screenings.
- Effective management and treatment of sewage screenings are becoming critical for municipal wastewater treatment plants.
Purpose of the Study:
- To investigate the fundamental dewatering behavior of sewage screenings.
- To analyze the relationship between pressure, water content, and flow resistance in screenings.
- To provide data for developing simulation models for wash press operations.
Main Methods:
- Conducted experiments to determine the pressure-water content relationship.
- Evaluated flow resistance as a function of applied pressure.
- Focused on characterizing the physical properties of sewage screenings relevant to dewatering.
Main Results:
- Established a correlation between applied pressure and the reduction of water content in screenings.
- Quantified the flow resistance characteristics of sewage screenings under varying pressures.
- Identified key parameters influencing the dewatering efficiency of screenings.
Conclusions:
- The study provides essential data for understanding sewage screening dewatering.
- Results can inform the design and optimization of wash press systems for improved efficiency.
- This research supports sustainable management of wastewater treatment byproducts.
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