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Small wastewater treatment plants

Condition assessment and rehabilitation of existing concrete tanks

Since the early 1990s, concrete tanks for three-compartment septic tanks have been manufactured of quality-controlled reinforced-concrete components using concrete grade B 45. After 25 years in operation, they are frequently still in good or even very good condition provided that appropriate ventilation is ensured.

However, without biological treatment, septic tanks do not comply with the state of the art required and will have to be renewed or „fully biologically“ retrofitted by 2015 at the latest. This retrofitting obligation also applies to older biological systems which do not meet the...

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Issue 02/2013 Day 3: Thursday, 7th February 2013

Small wastewater treatment systems

Title Titel Restricted traffic of goods for small wastewater treatment systems despite CE marking? trade obstacles imposed by national requirements, on the example of the General French Protocol...

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Issue 02/2014 Current safety-specific aspects

Construction and operation of small wastewater treatment plants

Safety during the construction and operation of small wastewater treatment plants is covered in many laws, regulations, and stan-dards. But a summary, simply accessible under the heading small...

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Issue 02/2015 Actual developments

Standards for small wastewater treatment plants

German and European standards are well established technical standards and they reflect the state of the art. Standards are a good instrument to manufacture comparable products and to distribute them...

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Issue 11/2014 Berding Beton

Precast concrete elements for ecological wastewater treatment

A constructed wetland system for wastewater treatment was built in the course of the rehabilitation of the Woltersburg Mill near the city of Uelzen/Germany. In order to save time and money, those...

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Issue 02/2014 Selection of pipe and manhole materials for sewer systems

Possible applications of concrete in wastewater treatment plants

The public sewer system existing in Germany has an overall length of approx. 550,000 km being worth about 680 billion. According to the evaluation of a survey carried out by DWA in 2009 [1], the...

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