An integrated monitoring system for optimisation of biopile composting

Savings in space, in excluding labour-intensive mechanical mixing and benefits from better control over environmental risks and emissions have made biopile composting increasingly attractive for compost engineers. Using forced aeration also allows treating semi-liquid wastes, e.g. sludges. The success of biopile composting is depending on the ability to control and adjust the process.

 

Composting parameters can be adjusted only when they are monitored. Typically, temperature and soil gases in biopiles are monitored in a limited number of spots only. The interaction between environmental and process variables are not fully understood and thus often not accounted for in the control regime. Interaction between different environmental factors and their impact on composting has to be addressed in biopile composting to overcome its main shortage: lack of
homogenisation from mechanical remixing of the masses.

 

The objective of the study was to optimise the engineering performance of a large scale bioreactor, simulating static biopile technique. An experiment was performed in a specially designed insulated metal reactor with a volume of 28 m3. Air was provided through a double-floor by a timer-adjusted ventilator. Soil gases and temperature were continuously monitored via eight vertical metal rods, each recording data on three measurement levels. Velocity of air in the compost mix was measured by systematic drilling of boreholes in different depths. Moisture probes were installed in the centre of the container for continuous monitoring. Water content was manipulated by deep injection with a specially designed device. The duration of the test was twelve months.

 

 

Stand der Pumpspeicher in Deutschland 2025
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (12/2025)
Infolge des Ausbaus der Stromerzeugung aus erneuerbaren Energien ist ein erhöhter Speicherbedarf im Stromverbundnetz notwendig. Hierdurch steigt die Bedeutung von Pumpspeichern als bis auf weiteres einzige Möglichkeit für eine großmaßstäbliche Stromspeicherung.

Pumpspeicherkraftwerke - Empfehlungen zur Verkuerzung und Vereinfachung von Genehmigungsverfahren in Deutschland
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (12/2025)
Die Genehmigungsverfahren sind sehr komplex sowie mit hohen Kosten und rechtlichen Unsicherheiten verbunden und dauern oftmals mehr als zehn Jahre.

Revitalisierung des Pumpspeicherwerks Happurg - Sanierung des Oberbeckens
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (12/2025)
Im Rahmen der Revitalisierung des Pumpspeicherwerks Happurg haben im September 2024 auch die Arbeiten zur Sanierung des zugehörigen Oberbeckens begonnen.

 

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