A flexible control system designed for lab-scale simulations and optimization of composting processes

Sh Oazana, M. Naor, J. Grinshpun, I. Halachmi, M. Raviv, I. Saadi, R. Avidov, V. Sudharsan Varma, L. Rosenfeld, A. Gross, Y. Laor

Research output: Contribution to journalArticlepeer-review


Understanding and optimization of composting processes can benefit from the use of controlled simulators of various scales. The Agricultural Research Organization Composting Simulator (ARO-CS) was recently built and it is flexibly automated by means of a programmable logic controller (PLC). Temperature, carbon dioxide, oxygen and airflow are monitored and controlled in seven 9-l reactors that are mounted into separate 80-l water baths. The PLC program includes three basic heating modes (pre-determined temperature profile, temperature-feedback (“self-heating”), and carbon dioxide-dependent temperature), three basic aeration modes (airflow dependence on temperature, carbon dioxide, or oxygen) and enables all possible combinations among them. This unique high flexibility provides a robust and valuable research tool to explore a wide range of research questions related to the science and engineering of composting. In this article the logic and flexibility of the control system is presented and demonstrated and its potential applications are discussed.

Original languageEnglish
Pages (from-to)150-160
Number of pages11
JournalWaste Management
StatePublished - Feb 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd


  • Aeration
  • Composting simulator
  • Programmable Logic Controller (PLC)
  • Self-heating
  • Temperature-feedback control

ASJC Scopus subject areas

  • Waste Management and Disposal


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