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Design procedure for carbon removal in contact stabilization activated sludge process
M Sarioğlu1, D Orhon, E Görgün
1MASS Treatment Systems Construction Industry and Trade Co., Inc., Gebze Organized Industrial Region, Ihsan Dede Cad. 700.Sok., 41480 Gebze-Kocaeli, Turkey. murats@massaritma.com
Summary
The contact stabilization activated sludge process (CSASP) offers a smaller, cost-effective solution for domestic sewage treatment. This method achieves comparable efficiency to traditional plants, particularly excelling with high particulate chemical oxygen demand (COD) wastewater.
Area of Science:
- Environmental Engineering
- Wastewater Treatment Technologies
- Microbial Ecology
Background:
- Conventional activated sludge plants face limitations in space and cost for domestic sewage treatment.
- Contact stabilization activated sludge process (CSASP) presents a compact alternative.
- CSASP is particularly suited for small to mid-scale facilities with high particulate chemical oxygen demand (COD).
Purpose of the Study:
- To evaluate the efficiency and design parameters of the contact stabilization activated sludge process (CSASP).
- To compare CSASP performance against conventional activated sludge systems.
- To identify key factors influencing CSASP treatment effectiveness.
Main Methods:
- Process simulation using modeling software.
- Analysis of sludge retention and volume reduction.
- Evaluation of treatment efficiency based on varying particulate COD fractions.
- Investigation of the sludge distribution factor (alpha) impact.
Main Results:
- CSASP achieved approximately 30% volume reduction compared to conventional plants while retaining equivalent sludge mass.
- Treatment efficiency of CSASP increased with higher particulate COD fractions in influent wastewater.
- The sludge distribution factor (alpha) significantly influences effluent quality and system hydraulic retention time (thetaHN).
Conclusions:
- CSASP is a viable and efficient technology for domestic sewage treatment, especially for smaller plants.
- Optimizing the sludge distribution factor (alpha) is crucial for achieving desired effluent quality.
- CSASP provides a cost-effective solution with reduced footprint compared to conventional methods.