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.

 

 

Hochlauf der Wasserstoffwirtschaft
© Lexxion Verlagsgesellschaft mbH (8/2024)
Überblick über und Diskussion der Maßnahmen zum beschleunigten Ausbau der Wasserstoffinfrastruktur in Deutschland

Die innerstaatliche Umsetzung des Pariser Klimaschutzübereinkommens - ein Rechtsvergleich
© Lexxion Verlagsgesellschaft mbH (8/2024)
Like all public international law treaties, the Paris Climate Accords rely on national law for their implementation. The success of the agreement therefore depends, to a large extent, on the stepstaken or not taken by national governments and legislators as well as on the instruments and mechanisms chosen for this task. Against this background, the present article compares different approaches to the implementation of the Paris Agreement, using court decisions as a means to assess their (legal) effectiveness.

Klimaschutzrecht und Erzeugung erneuerbarer Energien in der Schweiz
© Lexxion Verlagsgesellschaft mbH (8/2024)
Verschachtelte Gesetzgebung unter politischer Ungewissheit

 

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