Potential of Activated Sludge Utilization 1st Edition by Xiaoyi Yang 1617287776 9781617287770

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Product details:

ISBN 10: 1617287776 

ISBN 13: 9781617287770

Author: Xiaoyi Yang

As the lack of fossil fuel is increasing, sludge management is not only to satisfy the disposal criteria but also to obtain energy and resources. For better sewage sludge disposal and more efficient energy reclamation, a series of analysis and experiments were performed to study the potential of anaerobic digestion. This book explains biogas outputs in waste sludge treatment. Anaerobic digestion techniques have traditionally been employed to reduce the volume and weight of sludge and produce corresponding amounts of biogas. As most of the organics present in sewage sludge are enveloped by low biodegradability of the cell walls and extracellular biopolymers, the rate-limiting step in sludge digestion is generally believed to be the hydrolysis of particulate organic matter to soluble substance. Novel pre-treatment processes, WAO can improve biogas production. Furthermore, the generalized kinetic model is explored, which is relatively available to predict the WAO process of waste sludge. This book also discusses the values of point-selectivity, which show that there is a strong presence of acetic acid and short chain organic substance in the WAO treatment process, which were experimentally confirmed by chromatogram-mass spectrograph instrument.

Table of contents:

1. Introduction
1.1. Disposal Requirements
1.2. Recent Sludge Disposal
1.3. Progress in the Research of Municipal Waste Sludge Management
1.3.1. Rational Application and Science Strategy
– Perfecting and Executing Standard of Pollutants Control
– Removal of Heavy Metals
1.3.2. Reducing Sludge Output
References

2. Potential of Anaerobic Sludge Digestion
2.1. Effects of Sludge Characteristics on Anaerobic Digestion
2.1.1. Nutrient Contents
2.1.2. Inhibition Contents
– Heavy Metals
– Sulphide
2.2. Pretreatment for Enhanced Anaerobic Digestion
2.2.1. Mechanical Pretreatment
2.2.2. Chemical Pretreatment
2.2.3. Thermal Pretreatment
2.2.4. Ultrasound Pretreatment
2.2.5. Advanced Oxidation Pretreatment
2.3. Thermal Pretreatment Kinetics
2.3.1. Kinetic Model
2.3.2. Two-stage First-order Reaction Kinetic Model
2.3.3. Generalized Kinetic Model
2.4. Energy Output Potential
Abbreviations
References

3. Potential of Sludge Pyrolysis
3.1. Principles
3.2. Affecting Parameters
3.2.1. Temperature
3.2.2. Gas Residence Time
3.2.3. Heating Rate and Feed Size
3.2.4. Sludge Type
3.3. Pyrolysis Products
3.3.1. Oil
3.3.2. Char
3.3.3. Non-condensable Gas
3.4. Pretreatment for Sludge Pyrolysis
3.4.1. Acid and Base Pretreatment
3.4.2. Catalyst
3.5. Sludge Pyrolysis Kinetics
3.5.1. Overview
3.5.2. Thermal Decomposition Behavior of Sewage Sludge
3.5.3. Pyrolysis Kinetics Model
– Traditional Pyrolysis Model
– Lorentz Fitting Multi-heating Method Model
References

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Tags: Xiaoyi Yang, Potential, Activated, Sludge