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.

 

 

Europäische Rechtsvorgaben und Auswirkungen auf die Bioabfallwirtschaft in Deutschland
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (11/2025)
Bioabfälle machen 34 % der Siedlungsabfälle aus und bilden damit die größte Abfallfraktion im Siedlungsabfall in der EU. Rund 40 Millionen Tonnen Bioabfälle werden jährlich in der EU getrennt gesammelt und in ca. 4.500 Kompostierungs- und Vergärungsanlagen behandelt.

Vom Gärrest zum hochwertigen Gärprodukt - eine Einführung
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (11/2025)
Auch mittel- bis langfristig steht zu erwarten, dass die Kaskade aus anaerober und aerober Behandlung Standard für die Biogutbehandlung sein wird.

Die Mischung macht‘s - Der Gärrestmischer in der Praxis
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (11/2025)
Zur Nachbehandlung von Gärrest aus Bio- und Restabfall entwickelte Eggersmann den Gärrestmischer, der aus Gärresten und Zuschlagstoffen homogene, gut belüftbare Mischungen erzeugt. Damit wird den besonderen Anforderungen der Gärreste mit hohem Wassergehalt begegnet und eine effiziente Kompostierung ermöglicht.

 

 | Datenschutz 

 | Impressum