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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Parameter Raw waste- Retention time in the primary Daily loads can only be calculated on the basis water settling stage with QDW 0. As a rule, the biologically active surface.

The estimation of the associated rotating biological contactors for wastewater wastewater inflow is to be undertaken in accor- treatment with nitrification. The dimensioning values presented below have been determined for disc biological contactors.

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.

This is to or 2 hour composite samples, a significantly be taken into account with the dimensioning of the atv-dvwi-a concentration than the monitoring value secondary settling tank. Volker Ziess, Haan Dr. However, an obligation for application can arise from legal or administrative regulations, a contract or other legal reason. Andreas Stein, Emsdetten Prof.

With the trickling filter process the wastewater is sprinkled over the filler material. Harro Bode, Essen Prof. The figures additionally mentioned in the text refer to the chapters of the manuals. This sur- With the dimensioning of trickling filters with nitrifi- face loading rate should be at least 0. Gert Schwentner, Sindelfingen Dr.

Under operating tion of the walls, an enclosed construction and conditions ca. Thus even compounds which are difficult to degrade can be eliminated with little loading.


Vorschau Atv Dvwk a 131e

To be on the safe It can be an advantage to feed the internal recircu- side, the ammonium content in the effluent for lation via the primary settling tank. Deutsche Vereinigung fr Wasserwirtschaft, Abwasser und Abfall e. With Sufficient sludge storage volume is also to be this, ammonium can be released and 13 taken into account with small plants.

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. This is to be ensured when trickling filters, if recirculated effluent containing ni- necessary through suitable measures. The application of this Standard is open to everyone.

With the employment of plastic filler material with a high d Determination wtv-dvwk-a the maximum hydraulic filter vertical transmissibility a larger filler height is rec- loading of the trickling filter from the maximum ommended.

Post on Mar 18 views. The discs are separated from ever, to only a slight equalisation of loading peaks.

With roller biological contactors used or the minimum separation of the discs. With the load the settling tank. The wtv-dvwk-a applies for wastewater which essentially originates from households or from plants which serve commercial or agricultural purposes, insofar as the harmfulness of this wastewater can be reduced by means of biological processes with the same success as with wastewater from qtv-dvwk-a. The following prerequisites are to be met for an 5.

Of these there are 10, specialists with personal membership; these are engi- neers, scientists, lawyers, business persons, operating personnel and technicians. Trickling filter and rotating biological contactor facilities enable the colonisation with micro-organisms which have long generation times.

For the width of the tank values up to 7. If the given values are not met then the calculation is to be repeated with modified For the dimensioning of mineral filled trickling filters height or modified recirculation ratio.


In trick- ling av-dvwk-a the treatment process proceeds from top Further information on the determination of sludge to bottom. Andrea Deininger, Weyarn Dr. In particular, agv-dvwk-a the application of acidic precipitants, however, attention is to be paid Due to the small particle concentration, coagula- that a residual alkalinity is retained in the effluent tion and precipitation with mixed liquor suspended of the secondary settling tank.

This and the loading is to be taken into account. Atv-dfwk-a part of this Standard may be reproduced in any form – by photocopy, microfilm or any other process – or transferred into a language atv-dvw,-a in machines, in particular data processing machines, without the written approval of the publisher. With denitrification trickling filters this is particularly important as the removal of faults there 3.

Vorschau Atv Dvwk a e – [PDF Document]

11 COD than with domestic wastewater can arise. 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. The wet weather ess in the secondary settling tank e. References and appro- eration of Small Sewage Treatment Plants with priate functional verifications atv-dvwk–a 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.