A shift towards replacing fossil fuels with more renewable energy resources is expected to be a key driving factor in the growth of the Biogas Market. To help meet future global energy demand, incentives and even subsidies have been provided to encourage farmers, municipalities and industrial producers to increase their production volume.
Biogas is produced by the breakdown of organic matter, typically plant and animal waste products, in the absence of oxygen using anaerobic organisms. The process is fully controlled within a sealed stainless steel tank. The produced biogas is a clean and renewable energy that is considered an alternative to natural gas for cooking, producing vapor or hot water, and even generating electricity.
The complex bioreactors, where the production of biogas takes place, are designed to support a biologically active environment. And for the environment to be able to sustain the necessary activity and growth levels of the anaerobic organisms, there must be complete and precise control of many variables, including temperature, pH, and individual concentrations of oxygen, hydrogen sulfide and other dissolved gases. Monitoring individual gas levels helps biogas producers react to any changing condition inside their bioreactors before it could affect their anaerobe population.
AMI offers several gas analyzers, capable of helping biogas producers monitor their trace oxygen and trace hydrogen sulfide levels inside their bioreactors. Our Model 2010BR is designed for precise, reliable trace O2 measurements, while our Model 3000RS and Model 3010BR are built to provide accurate trace H2S measurements. Our units contain our patented Eliminator Cell Block™ and Command Center Electronics Platform™, considered the industry’s most advanced technologies for reliable and ease-of-operation gas analysis. And unlike other competitive oxygen analyzers and sensors that struggle within a hydrogen sulfide or carbon dioxide environment, our compact, rugged units are designed to handle some of the harshest environments and have agency approvals for Class 1, Div. 1 Groups B,C,D requirements in a flammable gas stream. Our T Series of O2 sensors can handle environments with 100% CO2 in the background and, more importantly, are the only trace oxygen sensors on the market with resistance to trace amounts of hydrogen sulfide. In fact, our T-4 trace oxygen sensor can tolerate up to 500ppm of H2S.
Our solutions for trace oxygen and trace hydrogen sulfide measurements would be indispensable instruments in helping you monitor the environment within your bioreactors. So contact us today and let us help you optimize your biogas production.
Hazardous area permanent mount trace oxygen analyzer
Hazardous area portable trace oxygen analyzer
Hazardous area permanent mount percent oxygen analyzer
Hazardous area permanent mount hydrogen sulfide analyzer
Hazardous area portable hydrogen sulfide analyzer
General purpose permanent mount trace oxygen analyzer
General purpose permanent mount trace oxygen analyzer. Atmospheric pressure sample source
General purpose permanent mount percent oxygen analyzer
General purpose permanent mount percent oxygen analyzer. Atmospheric pressure sample source
Multichannel general purpose permanent mount trace oxygen analyzer
Multichannel general purpose permanent mount trace oxygen analyzer for atmospheric pressure samples
Multichannel general purpose permanent mount percent oxygen analyzer
Multichannel general purpose permanent mount percent oxygen analyzer for atmospheric pressure samples
Low cost Division 2 area permanent mount trace oxygen analyzer
General purpose rack mount trace oxygen analyzer
General purpose rack mount percent oxygen analyzer
Conventionally we refer to the fuel-cell type galvanic sensor as “Electrochemical”. It is built using a liquid electrolyte, a noble metal cathode and a lead (typically) anode, and uses a Teflon™ membrane to control the oxygen flow into the active area. Such sensors are comparatively inexpensive, reliable and have been used for many years. They are the only practical way of measuring ppm levels of oxygen, and are also appropriate in many cases for measuring percent levels particularly when measuring in a flammable gas background.
Electrochemical sensors are a disposable part like a flashlight battery. In typical use they last about a year, and require regular calibration. They respond to the partial pressure of oxygen. They are specific to oxygen, and are not affected by the presence of flammable gases. Trace sensors have a zero output in the absence of oxygen, which means that they do not need to have a zero calibration – an almost impossible task in practice. They require no power and are comparatively low in cost. They require temperature compensation which is built into the analyzers that use them but they may respond to a sudden and rapid temperature change. They will also respond to barometric pressure changes in direct proportion to the absolute pressure. These latter characteristics are normally only significant in oxygen deficiency monitoring applications.
Electrochemical sensors should be used in general percentage measurements, in hazardous atmospheres, and with flammable background gases or to measure trace levels of oxygen. For percent measurements in inert background gases such as air, the zirconium oxide sensor is the better choice if power is available.
This kind of sensor uses a ceramic material at high temperature to measure oxygen. This general kind of sensor is commonly used in automobiles to control the air-fuel ratio, but the particular design used for gas analysis is quite different. It has a number of advantages in that it is extremely stable, very long-lived, and immune to barometric and temperature changes. On the other hand zirconium oxide sensors will oxidize anything flammable in the sample stream, burning up any oxygen present while they do so, so that they cannot be used in any gas stream with flammable components, or effectively with ppm levels of oxygen because any slightest trace of anything flammable (such as hydrocarbon gases, carbon monoxide or even oils from your fingers) will eat up trace oxygen giving a falsely low reading.
Zirconium oxide sensors should be used to measure percent levels of oxygen in inert atmospheres, such as the amount of oxygen in the air in an enclosed space. In this application they will last for many years without any real need for calibration or replacement. They should not be used with flammable gases or for measuring ppm levels of oxygen.