Measure digester gas, biogas, landfill gas, flare gas
 Sage Metering thermal mass flow meters are the preferred choice to measure, monitor and control gas mass flow for various environmental applications. Because of their low-end sensitivity, they accurately measure extremely low flow, down to 5 SFPM, making it the best choice for biogas, digester gas, landfill gas and other operations.
U.S. EPA Greenhouse Reporting Mandate
 Effective 2010, the U.S. EPA requires greenhouse gas emissions to be reported in mass flow (40 CFR Part 98). This impacts thousands of operations. The Sage Thermal Mass Flowmeter quantifies emissions saved by measuring mass flow. What makes the Sage Metering product ideal for these applications is its ability to measure extremely low flow rates, even down to 5 SFPM. Additionally, Sage is the only thermal mass flow meter that has an in-situ calibration procedure so the meter doesn’t have to be removed from service annually and returned to the manufacturer for calibration. The meter provides non-resettable totalizers and a variety of outputs, all in compliance with U.S. EPA Greenhouse Reporting protocols and other environmental protocols.
Environmental Applications for gas mass flow meters:
- Aeration Flow--Waste Water Treatment
Aeration flow is necessary to oxygenate basins, which assists in the breakdown of municipal waste. It is the oxygen introduced through air flow which maintains the proper balance for breaking down the sewage. By closely monitoring and measuring the process, a significant energy reduction can result.
Sage Thermal Mass Meters are perfect to monitor the air mass flow and communicate the data to the blower control system.
- Biogas
When organic matter, like industrial waste, plant matter or garbage, decomposes in an oxygen free environment, like a biogas digester, biogas is produced. This is a mixture of approximately 70% methane and 30% carbon dioxide. Biogas can be used as a fuel source for electricity or heat.
Thermal mass flow meters play a critical role in the entire biogas production process, from producing the gas to using the renewable fuel. In addition to the their use in production, to comply with the Greenhouse Gas Protocol and other reporting requirements for emission credits, there is a need to quantify the captured emissions, and Sage Metering gas mass meters have the ability to measure the low flow rates.
- Chlorine Gas--Municipal Water Treatment
Municipal water districts and waste water treatment facilities use chlorine to disinfect water. Control of the chlorine concentration is critical for the effectiveness and safety of the operation. Thermal mass flow meters, with optional Hastelloy construction (all wetted parts), provide flow rate data and control the chlorine dosage for optimal water purification. Additionally, chlorine gas measurement is common in vacuum chlorinators. The wide turndown, and low pressure drop of thermal gas mass flow meters are make it ideal for this application.
- Digester Gas--Farming Operations
Farmers and dairies are learning that manure, which normally breaks down to methane, can be converted to digester gas (65% methane/35% carbon dioxide) in an anaerobic digester. A digester system can produce a renewable fuel source that can be used for electricity or heat. Additionally, the methane destruction in the process has significant environmental benefits, since methane is 21 times more by likely to trap heat in the atmosphere than carbon dioxide.
Thermal mass flowmeters are used for various reasons in the digester process, but most significantly to quantify the emissions that are saved and comply with the EPA’s reporting standards and other initiatives.
Articles of Interest:
Dairies putting waste to work with digester gas
- Digester Gas--Waste Water Treatment
When organic matter decomposes in the absence of oxygen, digester gas (65% methane and 35% carbon dioxide) is produced. Digester gas in a waste water treatment process can be harnessed and used as a source of fuel for the facility, as well as be added to a larger power grid.
Gas mass thermal meters are perfect to monitor digester gas flow rates for waste water treatment digesters. Secondary purposes in this process include measuring flow for co-generation, measuring the excess gas being stored, and monitoring flare gas; which is required if reporting greenhouse gas reductions.
- Ethanol Distillation and Refining
Ethanol production is a complex process involving fermentation and distillation tanks. Thermal mass flow meters measure the flow of air and fuel to the distillation tanks to improve the air to fuel ratio. Better combustion control improves boiler efficiency and reduces emissions. Gas mass flowmeters are also used to measure CO2 leaving fermentation tanks, which is essential to assess process inefficiencies or meet environmental compliance requirements.
- Flare Gas
There are many operations or applications where waste gas is flared to atmosphere. Flare stacks are typically seen at oil and gas wells, refineries, well drilling rigs, natural gas plants, waste water treatment plants, chemical plants and landfills. Strict regulations require the operation to measure and record the consumption of flare gas, and often at various points within the process.
Sage Metering flare gas flow meters are the preferred choice to measure flare gas because of the instrument’s wide turndown, which can accommodate extreme flow conditions typical in an upset condition.
- Flue Gas Monitoring
Flue gases are a by-product of a combustion process and typically consist of nitrogen and carbon dioxide with traces of sulfur dioxide, nitrogen oxides, carbon monoxide, other trace gases and miscellaneous particulates. Flue gases contain pollutants and are regulated by local, regional or federal government agencies. For this reason stacks, ducts, chimneys, large pipes or other process venting systems often require flow metering to comply with environmental reporting.
The thermal mass meter’s fast response to flow changes, low pressure drop, and reproducibility are significant characteristics for flue gas reporting applications.
- Landfill Gas
When municipal solid waste is broken down, landfill gas is formed. If landfill gas is extracted from wellheads and collected a mixture of approximately 50% methane and 50% carbon dioxide will result. This extracted landfill gas is renewable energy and can be used to heat buildings, run generators and power vehicles. Additionally, landfill projects at times are involved in carbon offset projects. In fact there are over one thousand active projects worldwide where landfill gas is collected and emissions credits are accrued to meet EPA reporting standards (or Kyoto protocols).
The Sage Metering products are ideal to quantify emission reduction. Sage also provides Flare Gas Flow Meters, Engine Flow Meters, Wellhead Monitoring Portable Datalogging Flowmeters, and a variety of other Gas Mass Flow Meters that are involved in landfill gas monitoring and reporting.
- Oxygen--Odor Control
At many large municipal wastewater treatment plants, deodorizing aeration basins is required and can be achieved by blending a controlled amount of a fragrance compound with oxygen. The fragrance-infused oxygen is infused into the aeration basin, which minimizes the odor for neighboring communities. Thermal gas mass meters provide accurate, real-time measurement of the oxygen flow, assisting in controlling the dosing of fragrance compounds. Oxygen furnaces also require measurement to improve combustion control.
- Ozone - Water Purification
Thermal mass flow meters are often used to measure ozone, oxygen and sometime traces of nitrogen, in ozone systems which are an environmentally friendly alternative to chlorination at water treatment plants.The Sage In-Line Style Thermal Mass Flow Meter is calibrated for the exact mix of ozone and oxygen, and optimally and accurately delivers the gases to purify the water. Among the benefits are direct mass flow, fast response, and reproducibility for this application.
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