Combined wastewater feed directly into final clarification - advantage for receiving rivers
1aqua consult Ingenieur GmbH, Hannover, Germany. hartwig@aqua-consult.de
Summary
The Mina-Process efficiently treats combined wastewater by bypassing aeration and feeding directly into final clarification. This method effectively removes pollutants like COD, ammonia, and solids without overloading existing systems.
Area of Science:
- Environmental Engineering
- Water Treatment Technologies
Background:
- Combined sewer overflows pose challenges for wastewater treatment plants.
- Increasing influent to treatment plants can reduce discharge, but requires careful management.
Purpose of the Study:
- To evaluate the effectiveness of the Mina-Process for combined wastewater treatment.
- To assess pollutant removal efficiencies and system impact.
Main Methods:
- Bypassing aeration and directly feeding combined water into final clarification.
- Utilizing the adsorption capacity of aerated sludge and sedimentation effects.
- Large-scale testing at a 160,000 population equivalent (PE) plant in Wilhelmshaven.
Main Results:
- Achieved 75% removal of chemical oxygen demand (COD).
- Reached 60% removal of ammonia.
- Demonstrated 89% removal of suspended solids.
Conclusions:
- The Mina-Process offers a highly efficient and economical solution for combined water treatment.
- It leverages existing clarifier capabilities, avoiding the need for additional infrastructure.
- This approach effectively reduces pollutant discharge without significantly deteriorating effluent quality.
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