Automated Environmental Control Systems In Composting And Mushroom Growing

AKS Controller for Phase II Compost Pasteurization in Tunnels


AKS controller is used to control the process of compost pasteurization in phase II tunnels.

It measures air and compost temperature, oxygen concentration in compost gas. The process is performed by control of ratio between fresh and circulated air. The individual control algorithms are realized for each of seven pasteurization subphases. The algorithms can operate in both manual and automatic modes.
 AKS controls the entire process, from the moment of loading with new compost till the time of emptying.

The controller can be connected to PC via RS485 communication interface. TechnologSoft Mushroom Edition Software enables to control environmental parameters and react all alarm situations from your PC. The remote control of AKS is also possible through Internet and TeamViewer Software.


  • Compost temperature measurement in four points
  • Calculation of average compost temperature by four temperature probes
  • Air temperature measurement after inlet fan and tunnel
  • Calculation of speed change of compost temperature
  • Monitoring of oxygen concentration in the compost gas
  • Control of set parameters in manual or automatic mode
  • Setting parameters, modes, ranges of control for actuators and duration of each pasteurization subphase
  • Automatic or manual transition from one subphase to another using environmental parameters previously set by a grower
  • Setting inlet fan mode (manual or automatic)
  • Setting air damper mode (manual or automatic)
  • Manual remote control of exhaust fan
  • Diagnostics of probes and actuators
  • Alarm signals on sensors’ failure and temperature limits
  • Data transfer to PC via RS485 communication interface
  • Saving the settings and control parameters in nonvolatile memory
  • Remote PC control of the whole compost pasteurization process through Technologsoft PC Software

Basic Specifications

Temperature Range 0 to 100°С
Temperature Accuracy 0.1°C
Interface Type RS485
Supply Voltage 220 VAC±10%
Power Consumption max 18 W
Protection Class IP 54
Panel Board Dimensions (HxWxD) 500х420х130 mm


Controller's Design 

AKS Controller consists of the master controller on the DIN rail mounted inside of the plastic panel board and operator panel with TFT display on the front panel.

It also includes two 24VDC power supply units for actuators, 12 VDC power supply unit for RH probe fan, surge protector, key switch lock and external switches for setting operating modes and alarm lamps. The controller has a significant reserve of inputs and outputs. It is also possible to commutate other nonstandard input and output types.

AKS Controller can be supplied with TechnologSoft software for PC remote control. It all allows to choose individual configuration for customized applications and customer wishes.

Environmental Control in Phase II Tunnel


1...4 - Compost temperature probes
5 - Air temperature probe in a compost pasteurization tunnel
6 - Air temperature probe after inlet fan
7 - Circulation air damper (0-10 V)
8 - Outside air damper (0-10V)
9 - Inlet fan VFD (0-10 V

10 - Inlet fan
11 - Pressure damper
12 - Exhaust fan
13 - AKS Controller
14 - Chilling coil
15 - Oxygen concentration probe


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