Sewage sludge disposal - what costs can arise?

Sewage sludge must be disposed of at regular intervals. This is associated with costs. There are also alternatives.

Cost of disposal of sewage sludge

Sewage sludge accumulates both in mechanical wastewater treatment in primary treatment and as excess sludge in the biological treatment stage. In a few plants, where phosphorus is removed by precipitation, so-called precipitation sludge is added.

The costs are based on the standard volume of the container - not after the actual sludge attack. This is important to note, as frequent cleaning can significantly increase the cost of ownership.

The costs for removal and removal are in small wastewater treatment plants in the range of about 170 to 250 EUR per emptying. However, this varies depending on the type of plant and the size of the plant. You can expect between 25 and 50 EUR per cubic meter of volume.

In addition, some disposal companies charge travel packages.

Digging out for methane extraction and use for heating and power generation pays off only in very large-scale small sewage treatment plants. Average plant sizes produce too little sewage sludge to allow significant recovery.

However, a biogas plant can certainly be worthwhile in farms where manure is produced at the same time. Together with the liquid manure, the sewage sludge can be introduced here for free.

If a sufficiently large area is available, the sewage sludge can also be grounded in so-called grounding beds.

If it does not contain any questionable ingredients under the Sewage Sludge Ordinance, it can be used as humus or fertilizer. But an approval is required.

Tips & Tricks

In wetlands sewage sludge incurs only in the pre-cleaning. Part of the planted area could additionally be used for a grounding here.

Video Board: BIOROCK®, the best compact sewage treatment without electricity, zero energy. 25 years warranty!