Related Experiment Videos
Synchronous municipal sewerage-sludge stabilization.
1School of Environment Science and Engineering, Tongji University, Shanghai 200092, China. gbukuru@caramail.com
Journal of Environmental Sciences (China)
|May 20, 2005
Summary
This study demonstrates a novel three-step process for municipal sewerage and sludge stabilization, achieving high removal rates for pollutants and zero sludge emission. The system offers significant energy and cost savings in wastewater treatment.
Area of Science:
- Environmental Engineering
- Microbiology
- Ecology
Background:
- Municipal wastewater treatment generates significant sludge, posing disposal challenges.
- Current stabilization methods often involve high energy consumption and operational costs.
- Developing sustainable and cost-effective sludge stabilization techniques is crucial.
Purpose of the Study:
- To evaluate a novel three-step synchronous stabilization process for municipal sewerage and sludge.
- To assess the removal efficiency of key pollutants and sludge emission.
- To determine the energy consumption and operational costs of the integrated system.
Main Methods:
- A pilot plant was designed incorporating an anaerobic reactor, roughing filter, and a microbial-earthworm-ecofilter.
- The system utilized an artificial ecosystem for sludge degradation and stabilization.
- Key operational parameters such as hydraulic retention time and hydraulic load were controlled.
Main Results:
- High removal efficiencies were achieved: 83%-89% for COD(Cr), 94%-96% for BOD5, 96%-98% for SS, and 76%-95% for NH3-N.
- The integrated system demonstrated zero sludge emission.
- Significant savings in energy consumption and operational costs were observed.
Conclusions:
- The three-step stabilization process is effective in treating municipal sewerage and sludge.
- The microbial-earthworm-ecofilter system offers a sustainable solution for sludge management.
- The technology presents a cost-effective and energy-efficient approach to wastewater treatment.