Theory

• The gas that is finely generated from a reactor will turn into a bubble shape in a BRS cell which is filled with oil.
• Cumulative volume of gas generated is measured in two ways.
  • 1)calculating the total amount of gas by fixing the bubble volume and multiplying by the number of bubbles.
  • 2)calculating the total amount of gas by adding the volumes of each generated bubble, which is calculated using the time (T1, T2) taken by each bubble to pass through low and high sensors.
• The device can be used for both aerobic and anaerobic operations for wastewater studies.
• The device can be also used for biogas production, biomethane potential (BMP) analysis, or green energy studies (CO₂, CH₄, H₂ and N₂).
• Up to eight devices can be connected to a common computer, supporting up to 16 channels.
• The device uses temperature-based calibration to ensure accurate gas measurement.
• After measurements, the time interval of gas production/consumption volume data can be changed by changing Cumulative Time in Data Convert.

Specification

	BRS-110	BRS-200	BRS-800
No. of channels	4 channel	4 channel	8 channel
No. of expandable channels	Expandable 16 channels in a computer	Expandable 16 channels in a computer	Expandable 32 channels in a computer
Flowrate	0~1 mL/min	1~5 mL/min	0~0.2 mL/min
Measuring resolution	Approx. 0.03 mL	Approx. 0.15 mL	Approx. 0.03 mL
Measuring interval	1 sec~10 hours(changeable)	1 sec~10 hours(changeable)	1 sec~10 hours(changeable)
Gases	O₂ (OUR), CO₂, CH₄, H₂, and N₂	O₂ (OUR), CO₂, CH₄, H₂, and N₂	O₂ (OUR), CO₂, CH₄, H₂, and N₂
Error	≤2%	≤2%	≤2%
Data output	USB	USB	USB
Power input	DC 12V, 3.5A	DC 12V, 3.5A	DC 12V, 3.5A
Weight	1.7 kg	1.7 kg	1.7 kg
Size	190 mm(W) * 130 mm(D) * 110 mm(H)	200 mm(W) * 140 mm(D) * 120 mm(H)	200 mm(W) * 140 mm(D) * 120 mm(H)
Temperature	0~50℃	0~50℃	0~50℃
Humidity	≤95%	≤95%	≤95%
Material	Aluminum	Aluminum	Aluminum

Examples

Examples of experiments

• Gas production

  

• Biochemical oxygen demand (BOD)

  

• O₂ consumption

  

• Toxicity test with sporeforming bacteria

  

• Hydrogen gas production

  

• Toxicity test with algae

  

Screenshot of BRS program

• Graph

  

• Measurement

  

• Data convert

  

• Setting

  

Applications

• Measurement of oxygen consumption
• Oxygen uptake rate (OUR)
• Toxicity screening
• Biodegradation test
• Treatability assessment
• Laboratory respiration studies
• Soil respiration
• Biogas production
• Repiration of plants/animals
• BMP test
• Biochemical hydrogen potential
• Green energy studies

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