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Description

The new RITTER Biogas Batch Fermentation System

with Automatic Data Logging in Real Time

 

Maximum precise measurement results with individually calibrated RITTER MilliGascounters

 

The great advantage of the RITTER biogas batch fermentation system is that the fermentation bottles are heated on all sides in the heating oven. In contrast to the heating of the fermentation bottles in a water bath, uncontrolled cooling of the upper part of the bottle by room air and air currents is thus excluded. Furthermore, the fermentation bottles can be easily removed from the heating oven for short visual checks, even while fermentation is in progress.

 

The RITTER Biogas Batch Fermentation System with automatic data logging in real time

 

Features :

 

• Batches of up to …

   y 18 RITTER PMMA fermentation bottles and 18 RITTER MilliGascounters with heating oven type BBFS-18

   y 9 RITTER PMMA fermentation bottles and 9 RITTER MilliGascounters with heating oven type BBFS-9

• Individual volumetric calibration of each MilliGascounter, traceable to the German National Primary Standard (PTB)

• Automated data acquisition of gas volume and flow rate from biogas batch fermentation systems through real time data logging with Windows® software »RIGAMO«. (suitable for up to 18 RITTER MilliGascounters)

• Graphical and tabular display, printing and storing of measurement data.

• Export of stored data to Microsoft Excel®.

 

The RITTER Biogas Batch Fermentation System is available as a standard package for 18 fermentation bottles and in a more compact version for 9 fermentation bottles.

 

Standard 18x :

• 1x heating oven type BBFS-18 with integrated control unit for 18 stirring units

• 18x MilliGascounter MGC-1 PMMA

• 18x PMMA fermentation bottle 1 ltr with stirring unit

• 1x Rack for placing of MilliGascounters and absorption bottles

• 1x Data aquisition software »RIGAMO« 18-Channel

• 1x Signal Interface Module (»SIM«) 18-channel for data conversion into USB signal

• 1x complete set of gas tubes and electrical connection cables

 

Compact 9x :

• 1x heating oven type BBFS-9 with integrated control unit for 9 stirring units

• 9x MilliGascounter MGC-1 PMMA

• 9x PMMA fermentation bottle 1 ltr with stirring unit

• 1x Rack for placing of MilliGascounters and absorption bottles

• 1x Data aquisition software »RIGAMO« 9-Channel

• 1x Signal Interface Module (»SIM«) 9-channel for data conversion into USB signal

• 1x complete set of gas tubes and electrical connection cables

 

Overview of system components

 

Basic elements

 

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

• Intergrated 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 750 mm* x H 300 mm, Weight : 39.0 Kg

*Installation space for rear cable connections: +50 mm

 

Heating Oven Type BBFS-9 :

• Suitable for max. 9 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

• Intergrated 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 480 mm x D 600 mm* x H 300 mm, Weight : 26.0 Kg

*Installation space for rear cable connections: +50 mm

 

Rack :

• Suitable for simple and compact installation of max. 18 MilliGascounters and 18 optional CO2 absorption bottles

• Frame made of aluminium, shelves made of stainless steel 1.4571

 

Rack for BBFS-18 :

Dimensions : W 810 mm x D 370 mm x H 970 mm, Weight : 13.5 Kg

Rack for BBFS-9 :

Dimensions : W 540 mm x D 370 mm x H 970 mm, Weight : 9.0 Kg

 

Roller Table for Heating Oven BBFS-18 (Option) / BBFS-9 (Option)

 

Features :

• Wheeled table for setting up the heating oven for fermentation systems BBFS-18 /-9

• Total height incl. standing heating oven = standard height laboratory tables (920 mm)

 

Design :

• Table frame with 4 lockable rolls

• 1 additional storage compartment below the heating oven

• Suitable for holding the movable rack for the installation of MilliGascounters and absorption bottles

 

Material :

• 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

 

Table for BBFS-9 :

Dimensions : W 570 mm x D 570 mm x H 620 mm

 

PMMA Fermentation Bottle with stirring device

 

Feature highlights :

• Absolute gas-tight by magnetic coupling between stirring motor and stirring blade

• 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 by PMMA material (no fragile glass gas outlet nozzle)

• Incl. stirring blade …

    • Type A (standard): Suitable for media with medium viscosity and small to medium size solid materials

    • Type B (optional): Suitable for media with high viscosity and fibrous solid materials

    • Type C (optional): Suitable for media with low viscosity and low amounts of solid material

 

• Custom stirring blades available

• Incl. PVC tubing (Rauclair) øi 4mm, øo 6 mm, 1,5 m

   0.5 ltr → Dimensions with stiring device : H 183 mm x ø 130 mm, Weight : 0.95 kg

   1.0 ltr → Dimensions with stiring device : H 249 mm x ø 130 mm, Weight : 1.2 kg

   2.0 ltr → Dimensions with stiring device : H 399 mm x ø 130 mm, Weight : 1.5 kg

 

Technical Data :

• Stirring speed adjustable from 1 to 30 r/min *

• Interval stirring with programmable interval times *

• Suitable for media with low and high viscosity (≤ 450 mm²/sec)

• Temperature range: 10 – 55°C

• Step motor 2 Ampere

• Material fermentation bottle: PMMA crystal clear

* by Software »RIGAMO«

 

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

 

Block-MilliGascounter 9x (Option) :

• Multiple measurement cells in one unit

• Cells are measuring independently of each other

• Gas in/outlet for each cell

• Calibration certificate for each cell

• Compensation of temperature *

• Compensation of pressure *

• Compensation of humidity *

* with Software »RIGAMO«

 

Components for CO2 Absorption (Option)

 

Absorption Bottle :

• CO2 absorption rate better than 99%

• CO2 absorption capacities: See table at the bottom on page 8

• PMMA tank with flanged cover

• With unique dip pipe design and PVDF screw-type tube coupling

• Including tubing to fermentation bottle and to MilliGascounter øi 4 mm / øo 6 mm

• Volume 250 ml, overall dimensions ø 130 mm x H 100 mm, weight 400 g

 

Absorption solution :

• Caustic potash solution (KOH 3Mol in aqua dest.)

• Filling quantity per absorption bottle: 250 ml

• Delivery in bottles of 1 ltr

Please note: Due to transportation restrictions, the absorption solution might have to be purchased locally. Please contact RITTER!

 

No false readings with RITTERMilliGascounters due to CO2 absorption

 

In contrast to other suppliers, RITTER provides the possibility of measuring the total biogas volume from fermentation test consisting of methane and carbon dioxide. However, the high solubility of CO2 (0.8 ltr CO2 / 1 ltr water) is a problem with all measurements of CO2. In order to minimize the measurement error with the volumetric measurement by the MilliGascounter, RITTER uses acidulated distilled water (HCl 1.8%) as packing liquid.

 

Introducing the unique RITTER dip pipe

 

Ordinary systems for CO2 absorption lead the biogas into the inside upper part of the absorption bottle, the gas thus wetting the absorption liquid surface. The real CO2 absorption ranges between roughly 75% and 95%. Advanced systems are working with a dip pipe leading the gas into the absorption liquid. By bubbling the gas through the liquid, higher absorption rates can be obtained by the larger surface of the gas bubbles in contact with the liquid.

 

The ultimate advancement of the dip pipe system results in the unique RITTER dip pipe system: The lower end of the dip pipe is designed like a bell, holding the gas within the liquid. Both the large surface of the gas bubble inside of the bell as well as the long duration the gas bubble is kept in the bell result in the extraordinary absorption rate of better than 99%.

 

Another outstanding effect is the fact that the RITTER absorption system can operate without any

absorption liquid indicator showing the limit of the absorption capacity. It is a general problem of such indicators that the colour doesn’t change abruptly but continuously. Therefore, it is difficult for the user to recognize the true limit of the absorption capacity. In contrast to indicator systems the RITTER system guarantees a specific amount of CO2 being absorbed at an absorption rate better than 99%. For example: The absorption capacity is approx. 9 ltr of CO2 per 250 ml absorption bottle for biogas CH4 60% / CO2 40% and a flow rate of 200 ml/h. This corresponds to a biogas input of approx. 22 ltr.

 

More than 99% CO2-Absorption guaranteedwith RITTER unique dip pipe design

 

Features :

• Absorption solution: 3-molar caustic potash solution (KOH 3mol)

• Absorption bottle (»bubbler«): Gas inlet via a dip pipe with a unique design, allowing an absorption of more than 99%

• Volume of bubbler: 250 ml

• Filling quantity of absorption solution: 250 ml per bubbler

• CO2 absorption capacities per bubbler: Please see the table on the bottom of this page

• Absorption limit indicator: With the RITTER absorption system an absorption limit indicator is obsolete

• Easy-connect PVDF screw-type tube nozzles allow quick connection to RITTER PMMA fermentation bottles (on the gas production side) and to RITTER MilliGascounters (on the measurement side)

 

Application :

• The CO2 Absorption System was developed by RITTER to absorb CO2 from biogas reliably and with guaranteed(!) more than 99%.Without indicator liquid for absorption limit!. This absorption system combined with the »RITTER Biogas Batch Fermentation System«, provides the ideal solution for professional biogas research.

 

• Operating Principle

The biogas generated in the fermentation bottles flows through a dip pipe into the bubbler containing the absorption solution. More than 99% CO2 absorption will be achieved as a result of the large wetting surface of the biogas within the absorption liquid. This is made possible by the unique RITTER dip pipe design.

 

Standard Equipment :

• Absorption bottle (»bubbler«) 250 ml with PVDF dip pipe unit, 2 PVDF screw-type tube nozzles for gas inlet and outlet

• Check valve (1) with tube connection adapters for tubing øi = 4 mm

• Connection tubes made of special PVC

 

Accessories / Options :• 3-molar caustic potash solution, 1 ltr

 

(1) Please note: After gas production has stopped, some biogas including CO2 will remain in the headspace of the fermentation bottles. Even without gas flow, this CO2 fraction will continue to be absorbed by the bubblers.This can lead to under-pressure within the fermentation bottles, which may cause the absorption solution to flow back into the fermentation bottles. To prevent this, a check valve is delivered as standard with the system. It should be located in the tube between the fermentation and absorption bottles.

 

Technical Specifications

• Absorption bottle (»bubbler«) : Volume 250 ml, Material: PMMA tank with flanged lid, ø 130 mm x H 100 mm

• Absorption solution : 3-molar caustic potash solution (KOH 3mol in aqua dest.), Filling quantity per bubbler: 250 ml, delivered in 1-liter bottles

• Absorption capacities :

                                                 Biogas Input                                     Flow Rate (ml/h)

                                                                                              50      100     200   300   500   750   1000

CO2-absorption capacity,       60% CH4 / 40% CO2            13.4    12.1    8.8    7.9    7.8    7.7    7.6

approx (ltr)*                             40% CH4 / 60% CO2            13.5    11.8    8.9    8.5    8.3    8.0    8.1

 

Absorption limit (ltr)**              60% CH4 / 40% CO2             20.1  18.2    13.2   11.9  11.7  11.6  11.4

                                                40% CH4 / 60% CO2             9.0     7.9     5.9     5.7    5.5    5.3    5.4

 

• Gas connections : PVDF screw-type tube nozzles for øi 4 mm / øo 6 mm tubes

• Connection tubes : Low diffusion special PVC, øi 4 mm / øo 6 mm

• Pressure loss per bubbler : approx. 4 mbar

 

Components for Data Acquisition in Real Time

 

»RIGAMO« Software for data acquisition

Type: RIGAMO-V4.x

 

Improves the measurement accuracy of MilliGascounter from ±3% to better than ±1% across the whole flow rate range by algorithm using individual calibration data

 

Software features:

• Windows software (7 / 8 / 10) for data acquisition of gas volume and flow rate from up to 18 Ritter gas meters to a PC USB port. Attention: RIGAMO can only be started once at a time on a single PC

• Graphical and tabular real-time display of acquired data

• Storing of data

• Export of stored data to Microsoft Excel

• Automatic correction of the dynamic (flow rate dependent) measurement error (with MilliGascounters only).

• No support of bi-directional recognition of measuring drum rotation with Pulse Generator V4.01

• Requires Signal Interface Module »SIM«.

Please note the system specifications listed below ***

 

*** System requirements for the »RIGAMO« Software for data acquisition

• Gas meter with built-in pulse generator (MilliGascounter standard)

• Signal Interface Module »SIM«

• Operation system Windows 7 / 8 / 10

• Microsoft Excel® 2003 or higher for data export to Microsoft Excel

• Recommended processor performance: ≥ 1.5 GHz

• Random access memory (RAM): ≥ 500 MB

• 1 free USB port

• Monitor 17’’ (optimised for resolution of 1280x1024 pixel)

 

Signal Interface Module (»SIM«)

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

 

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

 

Functions:

• 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

 

Specifications:

• 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

 

Interfaces:

• 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

 

100% data security through data recovery! Guaranteed!

 

The »Signal Interface Module« (SIM) stores the measured values of all connected gas meters after the data recording has been started by the software »RIGAMO«. If the computer on which »RIGAMO« is executed fails for whatever reason, data recording and storage by the »SIM« will continue regardless of the computer function.

The only precondition: An uninterrupted power supply to the »SIM«, which can be achieved, for example, by an

»UPS battery« (Uninterruptible Power Supply).

 

The 100% data security of the storage is completed by the fact that in case of a restart of the computer resp.

RIGAMO” software, the measurement data since the failure of the computer can be read in by “RIGAMO”, while the current real-time measurement can be continued at the same time.

 

»MultiGas« Sensors for BBFS-9 & BBFS-18

 

The RITTER Biogas Batch Fermentation System »BBFS« allows the world-wide unique combination of:

• Biogas fermentation tests …

• Data acquisition of volume and flow rate …

• Gas analysis of CH4 and CO2 as an option …

 

… from up to 18 gas sources.For this purpose, 9 high-precision RITTER »MultiGas« NDIR (non-dispersive infrared) Sensors are installed in one casing. Up to 2 casings can be attached to the rack of the BBFS.

 

These sensors provide the gas analysis of biogas (and many other gases) used in R&D labs. This sophisticated technology in combination with the RITTER Biogas Batch Fermentation Systems BBFS-9 and BBFS-18 allows the exact analysis of biogas from up to 18 fermentation bottles. It is a powerful tool for evaluation of biogas fermentation science.