ISBN The main fields of activity of the ATV-DVWK are of the dard ATV-DVWK-A E for activated sludge sludge liquor must be contained in . Ing. Ziess, Haan-Gruiten Die Deutsche Bibliothek [The German Library] – CIP- Einheitsaufnahme ATV-DVWK Standard A E. Dimensioning of. +49 / (0) 30 / e-mail: @ German standard ( ATV-DVWK A ) Nitrogen removal procedures (DWA-A e, ).

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As a rule, more or less anaerobic processes occur in sludge silos for aerobic stabilised sludge. An as even free access to the biofilm and that waste sludge as possible complete wetting of the filter mate- can be removed with the wastewater. Water from the thickening and dewatering of an- Depending on the treatment requirements the pri- aerobic digested sludge contains ammonium in mary settling tanks should be dimensioned differ- high concentrations.

They are to be taken into account atv-dvwkk-a with very exten- sive requirements on solids removal. The cascade type approximately with the biologically active surface.

A simultaneous sludge stabi- lisation is not possible as primary and secondary sludge is produced separately.

Vorschau Atv Dvwk a 131e

With the trickling filter process the wastewater is sprinkled over the filler material. Technical regulations are drawn up for the selection of the most practical procedure for carbon, nitrogen and phosphorus removal, and for the dimensioning of the essential components and facilities of the plant.

Manfred Roth, Stuttgart Dr. No part of this Standard may be reproduced in any form – by photocopy, microfilm 1331 any other process – or transferred into a language usable in machines, in particular data processing machines, without the written approval of s publisher. As with all aerobic processes for biological wastewater treatment, the contact between biomass and wastewater is to be established and the biomass is to be atv-dvwka with oxygen. If tating biological contactors have the task of sepa- necessary the optimum dosing point is to be de- rating the waste sludge, removed from the biologi- termined through trials.



A prerequisite for the secure function of the plant, planned in accordance with this standard, is that sufficiently qualified, trained and permanently technically supported operating personnel are employed and involved in the planning process, comp. The activated sludge, which is held suspended in the water in the trough, plays only a small part in 6.

However, an obligation for application can arise from legal or administrative regulations, a contract or other legal reason. Specific theoretical surfaces of more ther improvement of performance. These should be substantiated With trickling filters with plastic filler material with a through trials see Chapter 1.

Werner Gebert, Planegg Dipl. Andrea Deininger, Weyarn Dr. Under operating tion of the walls, an enclosed construction and conditions ca. Foreword At the time of elaborating the previous issue of this ATV Standard there were only isolated activated sludge plants with nitrogen and phosphorus removal, from whose operating results information could be deduced for dimensioning and operation. The rele- TKN 11 10 10 P 1.

Settling Tank of Single-stage Trickling filters and Rotating If flocculation is carried out through dosing of biological contactors phosphate precipitants or polymers into the influent to the secondary settling tank, the surface loading If trickling filters and rotating biological contactors rate can be increased to 1. Section Odour nuisances can occur with this process with 5. References and appro- eration of Small Sewage Treatment Plants with priate functional verifications are to be requested, Aerobic Biological Purification Stage for Connec- operating safety and maintenance expense are to tion Values between 50 and Inhabitants and be observed.


Skip to main content. Parameter Raw waste- Retention time in the primary Daily loads can only be calculated on the basis water settling stage with QDW 0. A prerequisite for the secure function of the plant In the case of special conditions the dimensioning planned in accordance with this standard is that can often be carried out more correctly with the aid sufficient qualified, trained and permanently tech- of trials and operating results of existing plants.

Kayser, Braunschweig Chairman Dipl. It is recommended that such measures are imple- For disc biological contactors: Further the surface loading rate of the secondary settling planning aspects of construction and design, for tank may not exceed 0.

The planning period should com- erational safety.

This and the loading is to be taken into account. The wet weather ess in the secondary settling tank e. The relevant concentra- 3. With its application no one avoids responsibility for his own action or for the correct application in specific cases; this applies in particular for the atv-dvkw-a handling of the margins described in the Standard. The application of this Standard is open to everyo- If commercial or industrial wastewater with high ne.

The filler material planned for the trickling filter.

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