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Biogas Batch Fermentation System BBFS-18

Basic Elements BBFS-18

HXXO20201128141204PE 1600

Heating Oven Type BBFS-18

  • Suitable for max. 18 x 0.5 / 1.0 / 2.0 ltr PMMA Fermentation Bottles
  • Air circulation by 2 powerful fans for homogeneous heat distribution
  • Control panel with LCD display for digital temperature setting, increment 1°C
  • Integrated mainboard for operation of stirring units
  • RJ12 interface for bus line to the »SIM« signal interface module for controlling the oven temperature and speed/interval operation of the stirring devices (with RIGAMO V4.x)

Dimensions W 750 mm x D 720 mm x H 300 mm Weight 39.0 kg

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Roller Table for Heating Oven BBFS-18 (Option)

  • Wheeled table for setting up the heating oven for fermentation system BBFS-18
  • Total height incl. standing heating oven = standard height laboratory tables (920 mm)
  • Table frame with 4 lockable wheels
  • 1 additional storage compartment below the heating oven
  • Suitable for holding the movable rack for the installation of MilliGascounters and absorption bottles
  • Frame made of aluminium profiles, table plates made of PE-blue
Table for BBFS-18 Dimensions W 820 mm x D 720 mm x H 620 mm
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The illustration shows the tables with the ovens in place as well as well as with the rack for MilliGascounters and CO2 absorption bottles. The rack can be moved forward/backward for easy installation and handling of the MilliGascounters and CO2 absorption bottles.

The shown horizontal aluminium profiles can be used for hanging of gas sampling bags (option).

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HXXO20200628133408PE 1600 1170

PMMA Fermentation Bottle with Stirring device

Feature highlights
  • Absolute gas-tight by magnetic coupling between stirring motor and stirring blade
  • Various bottle sizes: 0.5 / 1 / 2 ltr – custom sizes on request
  • High breaking strength by PMMA material (no fragile glass gas outlet nozzle)
  • Custom stirring blades available
Technical Data
  • Stirring speed adjustable from 1 to 30 r/min *
  • Interval stirring with adjustable interval times *
  • Suitable for media with low and high viscosity (≤ 450 mm²/sec)
  • Temperature range: 10 – 55 °C
  • Max. pressure: 100 mbar
  • Material fermentation bottle: PMMA crystal-clear
  • 2 connection ports: 1 x gas outlet, 1 x purging of heads space or sample taking, PVDF screw-type tube connection for tube Øi 4mm, Øo 6 mm

* with »RIGAMO« Software

Dimensions of Fermentation Bottles
0.5 ltr H 183 mm x Ø 105/130 mm Weight 0.95 kg
1.0 ltr H 249 mm x Ø 105/130 mm Weight 1.2 kg
2.0 ltr H 380 mm x Ø 105/130 mm Weight 1.5 kg
Dimensions of Stirring Blades
0.5 ltr W 73 mm x H 45 mm
1.0 ltr W 73 mm x H 125 mm
2.0 ltr W 73 mm x H 285 mm

Please remove the Stirring Unit from the PMMA Fermentation Bottle before cleaning the bottle. The Fermentation Bottles can be cleaned with commercially available cleaning products and are dishwasher safe (max. 60 °C / 140 °F). Please do not use: organic substances, benzene, ethanol, alcohol, any benzene-containing petrol/gasoline, any dilution of synthetic resin

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HXXO20200630211310PE 1600 1170

MilliGascounter MGC-1 PMMA

Type: MGC-1 PMMA / Material: Casing PMMA, measurement cell PVDF

  • Measuring range: 1 ml/h to 1 ltr/h
  • Measuring accuracy: ±3% across the whole flow rate range (better ±1% with »RIGAMO« software  by dynamic correction of measurement errors)
  • Including individual calibration certificate
  • Volume measurement cell: 3 ml
  • Equipment: Digital display, 200 ml packing liquid, 1.5 m connection tube, cleaning tool, syringe and bubble level (1 piece each for up to max. 5 pc.)
  • Resolution (= min. measurement increment): 3ml
  • Max. operating temperature 60 °C
  • Max. overpressure: 100 mbar
PMMA / PVDF Dimensions ø 96 mm x H 112 mm Weight 468 g

For a detailed description see RITTER MilliGascounters and data sheet »MilliGascounter MGC-1 PMMA«.

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Data Acquisition Software »RIGAMO«

Type: RIGAMO-V3.x
  • Improves the measurement accuracy of MilliGascounters  from ±3% to better than ±1% across the whole flow rate range by algorithm using individual calibration data
  Software Features
  • Windows software ( XP / Vista / 7 / 8 / 10 ) for data acquisition of gas volume and flow rate from up to 24 RITTER Gas Meters to a PC USB port. Please note: RIGAMO can only be started once at a time on a single PC
  • Graphical and tabular display of measurement data
  • Storing of data
  • Export of stored data to Microsoft Excel®
  • Automatic correction of the dynamic measurement error (flow rate dependent) only with MGC 
  • No support of bi-directional recognition of measuring drum rotation with Pulse Generator V4.01
  • »RIGAMO« is designed to run on a single PC with only one Signal Interface Module (»SIM«)
System Requirements

  • 1 available USB port
  • Gas meter with built-in pulse generator (MilliGascounter standard)
  • Signal Interface Module »SIM« (option)
  • Operating system: Windows® 7 / 8 / 10
  • Microsoft Excel® 2003 or higher for data export to Excel®
  • Recommended processor performance: ≥1.5 GHz
  • Random access memory (RAM): ≥500 MB
  • Monitor 17’’ (optimised for monitor resolution of 1280x 1024 pixel or higher)

Please note: No other National Instruments software should be installed on the respective computer as it may conflict with the RIGAMO software.

A standard converter »USB to RS232« for connection to COM port cannot be used.

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Signal Interface Module (»SIM«)

Types: 1-/3-/9-/18-Channel

Central interface module for RITTER biogas batch fermentation system BBFS V4.x


  • Data transmission of gas volume and temperature of a RITTER gas meter
  • Normalisation (temperature and pressure compensation) of gas volume and volume flow *
  • Data transmission for temperature control of the heating oven *
  • Data transmission for stirrer control of the fermentation bottles *
  • Conversion of data into USB signals for connection to PC.


  • Number of recordable data channels: max. 18
  • incl. data acquisition software »RIGAMO« V4.x
  • incl. SD card for permanent storage of previously recorded measuremet data
  • incl. temperature sensor PT 1000, 0 to 80°C
  • incl. pressure sensor for atmospheric pressure, 300 - 1,100 mbar abs.
  • incl. rechargeable battery NiMH (nickel-metal hydride)
  • incl. USB cable 5 m
  • incl. power supply 230 V AC - 12 V DC
  • Temperature range: 0 - 55°C
  • Aluminium casing W x H x D 103 x 30 x 220 mm, 400 g


  • Signal inputs of RITTER gas meters (TG, MGC, BG)
  • 1 x bus RS485 heating oven
  • 1 x bus RS485 for additional SIM units for other RITTER products
  • 1 x USB interface for data exchange with PC *
  • 1 x temperature sensor

* by software »RIGAMO« V4.x

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Components for CO2 Absorption (Option)

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CO2 Absorption Bottle

  • CO2 absorption rate better than 99%
  • CO2 absorption capacities: See »COAbsorption System«.
  • With unique dip pipe design and PVDF screw-type tube coupling
  • Including tubing to PMMA Fermentation Bottle  and to MilliGascounter øi 4 mm / øo 6 mm
  • Volume 250 ml, ø D 95 mm x H 106 mm (overall dimensions ø D 95 mm x H 145 mm, weight 290 g)

For a detailed description see Data Sheet »CO2 Absorption Bottle«.

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More Options

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PMMA Fermentation Bottle without stirring device

  • 1 x Connection for gas outlet port, PVDF screw-type tube connection  øi 4 mm, øo 6 mm
  • 1 x Connection for flushing of headspace or sample extraction, PVDF screw-type tube connection øi 4 mm, øo 6 mm
  • Various bottle sizes: 0.5 / 1 / 2 ltr - custom sizes on request
  •  High breaking strength due to PMMA material (without fragile glass gas outlet nozzle)
0.5 ltr Dimensions ø H 110 mm x D 105 mm Weight 0.25 kg
1.0 ltr Dimensions ø H 190 mm x D 105 mm Weight 0.4 kg
2.0 ltr Dimensions ø H 350 mm x D 105 mm Weight 0.7 kg

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Stirring device for RITTER PMMA fermentation bottles

  • Incl. magnetic coupling for absolute gas tightness of fermentation bottle
  • With intervalic stirring (1 min / 1 min)
  • Suitable for media with low and high viscosity ≤ 450 mm²/sec (≙ 65 sec capillary flow cup 6 mm DIN EN ISO 2431)
  • Step motor 2 ampere, 15 rpm
  • Custom stirring blades available
0.5 ltr Dimensions of stirring blade W 73 mm x H 45 mm Weight ~ 0.7 kg
1.0 ltr Dimensions of stirring blade W 73 mm x H 125 mm Weight ~ 0.7 kg
2.0 ltr Dimensions of stirring blade W 73 mm x H 285 mm Weight ~ 0.7 kg


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V 4.0 / Rev. 2022-07-25 / Subject to alterations.