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Degremont Design Manual

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Sand pressure filtration with manual or automatic filter. SUEZ - Treatment solutions. Degremont Compact Units product line. 183 avenue du 18 juin 1940. 92 508 Rueil-Malmaison FRANCE. Phone + 33 1 46 25 62 36 / + 33 1 46 25 60 00. Fax + 33 1 58 81 57 22 ucd@degremont.com services. 'Degremont Design Manual drjhonda com June 17th, 2018 - Manual Degremont Degremont Water Treatment Handbook Free Pdf Degremont 1979 Water Treatment Handbook Thomas would body dec process handbook 1991 PDF' 'Resources Knowledge Center Treatment Solutions June 12th, 2018 - Knowledge Center Water Treatment Handbook A Technical Guide to Water This.

clarifier functions

The satisfactory operation of a wastewater treatment plant working with activated sludge needs the treated water to be properly separated from the activated sludge so as to produce a clarified effluent that meets standards on discharge.

Degremont Design Manual 2019

Traditionally, this solid-liquid separation can classically be carried out by gravity sedimentation in a secondary settling tank or clarifier, even when other processes, such as flotation, can also apply (albeit at greater cost).

The clarifier is a fundamental part of the activated sludge system. It has to combine three functions:

  • clarification: producing a final clarified effluent with a suspended solids content that is generally below 20-30 mg·L–1, i.e. separation efficiency better than 98%;
  • thickening function: producing a continuous output of concentrated sludge for recirculation in the biological reactor, ensuring the latter’s suspended solids settings are maintained et extraire les boues en excèsand the excess sludge extracted;

Degremont Design Manual Pdf

  • storage: storing the additional mass of sludge produced as the result of a transient hydraulic overload (particularly during rainfall episodes).

Should any of these three functions fail, suspended solids will be discharged with the outgoing water, with two consequences: deteriorating quality of water processed with regard to suspended solids and also to COD, BOD, TN and TP and the danger of deteriorating biological operation through the uncontrolled reduction in biomass concentration.

The clarifier’s behaviour in each of these three functions will be influenced by various factors, the main ones being the most important in terms of design are the throughputs of water to be treated and sludge properties (settling and thickening capabilities). Other factors such as the structure’s physical and hydraulic characteristics, the design of the degassing area between the biological reactor and the clarifier, especially in the case of very deep reactors (over 7 m deep) will also apply, particularly in terms of achieving very low suspended solids concentrations.

clarifier dimensioning

Design

Secondary settling dimensioning requires the determination of three parameters: tank surface area, sidewater depth and sludge recirculation rate.

The following calculation rules have been derived from ATV dimensioning recommendations. These rules apply to circular and rectangular clarifiers.

the tank surface area

This surface area is established on the basis of permissible surface loading (in m3·m–2·h–1), more generally known as the rising velocity Va defined by the following formula:

Water treatment handbook - 1991 sixth edition

Degremont

ISBN: 2950398413

A useful handbook on water treatment for engineers and students.

Volume 1
1. Water, a fundamental element.
2. Treatment, what type of water and why?
3. Basic phsyysical-chemical processes in water treatment.
4. Basic biological processes in water treatment.
5. Methods and means of analysis..
6. Aquatic organisms.
7. The effects of water on materials.
8. Formulae digest.
Volume 2
9. Preliminary treatment systems.
10. Flocculation - settling - flotation.
11. Aerobic biological processes.
12. Methane fermentation.
13. Filters.
14. Modern ion exchange methods.
15. Separation by membranes.
16. Deaeration, stripping, evaporation.
17. Oxidation - Disinfection.
18. Thickening and stabilization of sludge.
19. Sludge treatment.
20. Storage and feeding of reagents.
21. Measurement, control, automation and supervision.
22. Treatment of drinking water.
23. Treatment of swimming pool water.
24. Municipal wastewater treatment.
25. Treatment and conditioning of industrial water.
26. Industiral processes and the treatment fo wastewater.

Get a copy of this two volume work direct from Lenntech: info@lenntech .com

Review:

A very complete and elaborate description of all subjects that are valuable to gain an understanding of water and water treatment, in two volumes.



If you have any questions on water or water related terms, please check out our water glossary and water FAQ's

If you have questions on water treatment, check out our water treatment pages and our water treatment decision path

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Degremont Design Manual 2020


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