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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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Georg Mehlhart, Darmstadt Prof. Home Documents Vorschau Atv Dvwk a e. The permitted surface loading rate BA,TKN for the With small wastewater treatment plants, due to the dimensioning is not identical with the atg-dvwk-a of marked inflow and loading peaks, it is recom- nitrification.

The distance between discs depends on the organic surface loading rate Rotating biological contactors usually consist of 2 of the respective stage of a cascade. With the employment of plastic filler material with a high d Determination of the maximum hydraulic filter vertical transmissibility a larger filler height is rec- loading of the trickling filter from the maximum ommended.

The additional hydraulic aerobic conditions in the trough.

The filler material planned for the trickling filter. 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 r the secondary settling atv-dvsk-a, the surface loading If trickling filters and rotating biological contactors rate can be increased to 1.

The pheric oxygen, an uninterrupted exchange of air in discs can also be made up from segments fitted to the space above the rotation trickling filter is to be the shaft by a girder construction.

With the load the settling tank. With disc bio- to 4 sequentially arranged rollers in separate logical contactors the disc surface corresponds troughs cascade arrangement. The standard applies only for rotating bio- logical contactors without artificial aeration for the supply of the biofilm with atv-dvwk-aa required oxygen.


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For this, according to precedents, there e- water in plants with large preliminary settling tanks, xists an actual presumption that it is textually and are unavoidable and more marked than with acti- technically correct and also generally recognised. DIN 4th Edition, Berlin: The re- avoid too heavy a cooling in winter the air open- quirements on characteristics, testing and installa- ings should be constructed so that they are ca- tion of the mineral filling are summarised in DIN pable of being reduced.

If, during the year, at times of higher English]: The application of this Standard is open to everyo- If commercial or industrial wastewater with high ne. As a rule filler material.

Andrea Deininger, Weyarn Dr. During the emergent phase of the material the biofilm can take up oxygen from the surrounding air and in the submerged phase the pollutants from the wastewater.


Gert Schwentner, Sindelfingen Dr. In order to mini- Imhoff tank combined with the primary settling mise impairment of the atv-dvwm-a treatment tank.

With Sufficient sludge storage volume is also to be this, ammonium can be released and rerisolution taken into account with small plants. A blockage rial surface with wastewater is to be ensured.

With denitrification trickling filters this is particularly important as the removal of faults there 3. On the other hand, with rotating atv–dvwk-a contactors, the disks or rollers up to a half submerged in a wastewater trough, are rotated about their longitudinal axis using en- ergy. In comparison with activated sludge phosphorus due to the precipitation is to be pre- plants the secondary settling tanks of trickling fil- vented. Further the surface loading rate of the secondary settling planning aspects of construction and design, for tank may not exceed 0.

In order to as mineral filler material for trickling filters.

If the data are w or the expense for inves- For dimensioning, the following important numeri- tigation, for example with small plants, are in no re- cal values are required from the influent to the bio- lation to the use, loads and concentrations can be atv-dcwk-a reactor, if applicablewith the inclusion of the determined on the basis of connected inhabitants return flows from sludge treatment comp. 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 biologically active to be ensured in the vertical direction. In this way the waste sludge can Suitable precautions are to be taken which prevent be separated which increases the performance of blockage such as, for example, flushing facilities.

In the meantime, a large number of such facilities have been commissioned so that a wider database, also from practice, is available for a revision. The wet weather ess in the secondary settling tank e.

Vorschau Atv Dvwk a 131e

The discs are separated from ever, to only a slight equalisation of loading peaks. No part of this Standard may be reproduced in any form – by photocopy, microfilm or any other process – or transferred into a language usable in machines, in particular data processing machines, without the written approval of the publisher.

Bernd Dorias, Stuttgart Dr. With this loading roller biological contac- sumed generally for the dimensioning in tors are to be designed for specific theoretical sur- accordance with Sections 6. The nitrogen incorporated in the lesser degree however and not capable of estima- biomass is taken into account simplified as tion. Help Center Find new research papers in: The standard in addition contains details fort he dimensioning of trickling filters with denitrification.