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Published on: December 25, 2015
A high rate clarifier for load levelling in sewerage systems
1CDS Technologies Ltd., 32 Hartnett Drive Seaford, Victoria, Australia 3198.
Summary
A new hybrid physico-chemical system effectively clarifies sewage, significantly reducing pollutants and increasing sewer capacity by 20-25%. This technology offers a cost-effective solution for managing wastewater loads and potential water reuse.
Area of Science:
- Environmental Engineering
- Water Treatment Technologies
Background:
- Sewage treatment plants face challenges with heavy sewer loading, especially during peak periods.
- Existing infrastructure may require costly augmentation to meet demand.
- Load smoothing is crucial for maintaining operational efficiency and preventing system overload.
Purpose of the Study:
- To evaluate the effectiveness of the CDS Fine Solids Separation (FSS) System for clarifying sewage.
- To assess the system's ability to smooth sewer load and defer infrastructure upgrades.
- To determine the impact of the FSS system on various water quality parameters and explore water reuse potential.
Main Methods:
- A hybrid physico-chemical system (CDS Fine Solids Separation - FSS) was field-trialed.
- The system combines chemically assisted clarification with proprietary physical separation.
- Water quality parameters were monitored over a two-month period under varying operational conditions.
Main Results:
- Significant reductions in Total Suspended Solids (TSS), Total Phosphorus (TP), Fecal Coliforms (FC), BOD5, and turbidity were achieved.
- Minimal reduction in Ammonia (NH3) and Total Organic Nitrogen (TON) was observed.
- The FSS system demonstrated a 20-25% increase in effective sewer capacity, meeting load-leveling objectives.
Conclusions:
- The CDS FSS System is a high-rate process effective for clarifying sewage and waste streams.
- The technology can defer costly sewer augmentation by increasing effective capacity and smoothing load.
- Effluent quality suggests potential for water reuse applications.
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