The combined version includes both the calculation to DWA-A 131 (June 2016) for the design and recalculation of single-stage activated sludge plants as well as additionally the design and recalculation of pressurized aeration systems according to DWA-M 229-1.
This report is intended to provide general guidance for water utilities, consulting engineers and regulatory agencies for planning and expanding non-potable water reuse as an alternative freshwater supply, in particular for agricultural irrigation, urban landscape irrigation and other urban uses, and industrial practices.
The design of wastewater and sludge treatment plants under deviating wastewater and climatic conditions in other countries requires an amendment of existing design rules compliant to the DWA Set of Rules, which have been primarily developed for Central European conditions. This concerns, for example, the consideration of high or low wastewater temperatures, increased salt content or special discharge requirements.
This Standard sets out a common basis for the design, construction, and operation of planted and unplanted filters for biological treatment of municipal wastewater. Wastewater treatment with planted and unplanted filters is characterized by a simple structural design, a simple mode of operation, a low production of biomass and secondary sludge, a low use of external energy, and a high treatment efficiency, even for treatment systems with a small number of sewer connections.
This Standard introduces the energy check and energy analysis as instruments for energy optimisation of wastewater systems and formulates requirements for their execution. The scope of application covers wastewater treatment plants and wastewater collecting.
This Guideline summarises commonly used systems as well as their dewatering efficiency and cost effectiveness. Furthermore, it presents information on operational requirements and conditions, particularly in regard to the conditioning process required prior to mechanical dewatering.
For planners and operators of mono-incineration plants, this Advisory Guideline shall supply a basis for the determination about concepts during the planning phase and for decisions on Investments for the construction of new plants. This Advisory Guideline also supplies important information for machinery manufacturers and plant engineers.
The objective of the Advisory Guideline DWA-M 387 is to give fundamental information for the technical realisation and operation of plants for the co-incineration of sewage sludges in coal power plants.
In addition to the basic principles and the system design of New Alternative Sanitation Systems (NASS), this Standard presents in particular the specific characteristics, which, compared to conventional systems, are to be considered during conception, planning, construction and operation. By a description of the essential aspects and the approach to comparative evaluation of different concepts, including NASS, the effects of the chosen systems on all relevant protection goals and criteria can be considered comprehensively.
Operators of wastewater facilities shall establish service and operating instructions tailored to their respective circumstances in order to adhere to the requirements especially of § 57 of the German Water Resources Management Law (WHG) and in order to meet the minimum requirements of the self-inspection or self-monitoring ordinances of Germany's federal states.
The publication entitled ‘Operational Problems in Wastewater Treatment Plants – A Handbook for the Operation of Wastewater Treatment Plants’ offers a practice guideline for troubleshooting operational deterioration in wastewater treatment plants.
In 1998 the former ATV Sub-Committee 3.2 presented the working report "Thickening of Sewage Sludge". The various procedures and their efficiency and cost-effectiveness have been updated and are now presented in this Advisory Leaflet.
The case studies introduced describe possibilities of avoidance, restorage, usage, storage in water bodies and on land as well as reconditioning, recycling and finally disposal of dredged material from inland water bodies which are implemented in practice.
The biological stage of wastewater treatment plants, employing trickling filters and rotating biological contactors without sludge return feed, is dealt with in this Standard. The standard applies only for rotating biological contactors without artificial aeration for the supply of the biofilm with the required oxygen.