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Enhanced technology based for sewage sludge deep dewatering: A critical review
Bingdi Cao1, Tao Zhang1, Weijun Zhang2
1State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Water Research
|November 27, 2020
Summary
Sludge dewatering is challenging due to extracellular polymeric substances (EPS). This review examines chemical preconditioning and enhanced technologies to improve sludge dewatering efficiency and environmental friendliness.
Area of Science:
- Environmental Science
- Chemical Engineering
- Water Treatment
Background:
- Sludge, a byproduct of sewage treatment, contains pollutants and extracellular polymeric substances (EPS) that hinder dewatering.
- Efficient sludge dewatering is crucial for managing growing sludge volumes and mitigating environmental risks.
Purpose of the Study:
- To comprehensively review sludge dewatering challenges and chemical conditioning technologies.
- To analyze the impact of various chemical conditioners and enhanced dewatering methods on efficiency.
- To provide insights into chemical conditioner mechanisms and promote eco-friendly dewatering solutions.
Main Methods:
- Systematic review of existing literature on sludge dewatering technologies.
- Evaluation of chemical preconditioning methods, including high-pressure filtration and electro-mechanical dewatering.
- Analysis of different enhanced dewatering technologies, their adaptability, and disposal methods.
Main Results:
- Chemical preconditioning significantly impacts sludge dewatering efficiency.
- Extracellular polymeric substances (EPS) are a key factor complicating sludge dewatering.
- Various enhanced dewatering technologies offer different advantages for sludge treatment.
Conclusions:
- Understanding chemical conditioner mechanisms is vital for optimizing sludge dewatering.
- This review offers guidance for debugging sludge dewatering processes.
- Promoting efficient and environmentally friendly sludge dewatering technologies is essential.
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