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Potential of Activated Sludge Utilization
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Authors: Xiaoyi Yang (Department of Thermal Energy Engineering, Beihang University, Beijing, China) 
Book Description:
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.

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Table of Contents:
1. INTRODUCTION, pp. 1-8
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
1.3.2 Reducing sludge output

REFERENCES
2. POTENTIAL OF ANAEROBIC SLUDGE DIGESTION, pp. 9-30
2.1.1 Nutrient contents
2.1.2 Inhibition contents
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 The two-stage first-order reaction kinetic model
2.3.3 Generalized kinetic model
2.4 ENERGY OUTPUT POTENTIAL
ABBREVIATIONS

3. POTENTIAL OF SLUDGE PYROLYSIS, pp. 31-46
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 pre-treatment
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
REFERENCES

Index, pp. 47

   Series:
      Environmental Science, Engineering and Technology
   Binding: Softcover
   Pub. Date: 2009
   ISBN: 978-1-60876-019-0
   Status: AV
  
Status Code Description
AN Announcing
FM Formatting
PP Page Proofs
FP Final Production
EP Editorial Production
PR At Prepress
AP At Press
AV Available
  
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Potential of Activated Sludge Utilization