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BSI PD CEN/TR 16456:2013

BSI PD CEN/TR 16456:2013

$215.11

Characterization of sludges. Good practice of sludge dewatering

Published By Publication Date Number of Pages
BSI 2013 72
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This Technical Report describes good practice for sludge dewatering and belongs to a series on sludge management options.

It gives guidance on technical and operational aspects of conditioning, thickening and dewatering processes.

Drying, which is another water content reduction process, is not dealt with in this document, but in CEN/TR 15473, Characterization of sludges — Good practice for sludges drying.

This report is applicable for sludges from:

  • urban wastewater treatment plants;

  • treatment plants for industrial wastewater similar to urban wastewater;

  • water supply treatment plants.

This document may be applicable to sludges of other origin.

PDF Catalog

PDF Pages PDF Title
4 Contents Page
6 Foreword
7 Introduction
10 1 Scope
2 Normative references
3 Terms and definitions
13 4 Description and features of thickening / dewatering systems
4.1 Thickening devices
4.1.1 General
4.1.2 Devices based on natural forces (gravity)
4.1.2.1 General
4.1.2.2 Gravity thickener
14 4.1.2.3 Deep cone thickener
15 4.1.3 Devices based on flotation
16 4.1.4 Devices based on filtration
4.1.4.1 General
4.1.4.2 Belt thickener
17 4.1.4.3 Disc thickener
18 4.1.4.4 Drum thickener
19 4.1.4.5 Screw thickener
20 4.1.4.6 Draining bag/tubes
21 4.1.4.7 Horizontal grids / deck thickeners
4.1.5 Devices based on centrifugation
22 4.2 Dewatering devices
4.2.1 General
4.2.2 Filter press (plate, membrane)
24 4.2.3 Belt (filter) press
25 4.2.4 Centrifuge
4.2.5 Screw press
26 4.2.6 Others
27 5 Conditioning
5.1 General
5.2 Conditioning processes
5.2.1 General
5.2.2 Coagulation
5.2.3 Flocculation
5.2.3.1 Floculation by polymers
29 5.2.3.2 Flocculation by inorganic chemicals
5.2.4 Physical processes
30 5.3 Conditioners
5.3.1 General
5.3.2 Polymers
31 5.3.3 Inorganic chemicals (multivalent salts, lime)
5.3.4 Other products
32 5.4 Technical aspects
5.4.1 Storage of conditioner
5.4.2 Selection of conditioner
5.4.2.1 General
5.4.2.2 Sludge properties
5.4.2.3 Dewatering equipment
33 5.4.2.4 Final use or disposal
5.4.2.5 Laboratory procedure for conditioning
5.4.3 Preparation of conditioners
5.4.3.1 Organic conditioners
35 5.4.3.2 Inorganic (mineral) conditioners
36 5.4.4 Injection, dosing and mixing with sludge
39 5.4.5 Automation
6 Parameters / Methods for the evaluation of sludge thickenability or dewaterability
6.1 General
6.2 Mechanisms description
6.2.1 Settling / Flotation
41 6.2.2 Centrifugation
6.2.3 Filtration
43 6.3 Basic theories and parameters
6.3.1 Settling / Flotation
44 6.3.2 Centrifugation
6.3.3 Filtration
46 6.4 Methods of evaluation
6.4.1 General
6.4.2 Settleability / Thickenability
47 6.4.3 Centrifugability
48 6.4.4 Filterability
50 6.4.5 Basic parameters
51 7 Critical parameters for sizing and optimisation of thickening/dewatering systems
7.1 General
52 7.2 Gravity thickeners
7.3 Belt thickeners
7.4 Centrifuges
54 7.5 Filter-presses
7.6 Belt-presses
55 7.7 Screw-presses
8 Operational and economic aspects of thickening/dewatering systems
8.1 General
8.2 Performances
58 8.3 Energy consumption
59 8.4 Labour requirements
8.5 Water consumption
60 8.6 Maintenance
8.7 Safety aspects
8.8 Automation
61 8.9 Cost aspects
62 8.10 Final considerations
65 9 Conclusions
67 Annex A (informative) Environmental checklist
68 Bibliography

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BSI PD CEN/TR 16456:2013
$215.11