Application

Vacuum pumps for biogas, landfill and digester gas

Biogas is produced by anaerobic digestion in the digester or fermenter, landfill gas in the landfill. Vacuum pumps and compressors collect the gas, circulate it through the sludge according to Busch and convey it to upgrading by pressure swing adsorption or membrane. Below you can see how the application works, what vacuum the manufacturers name and which of their series are intended for it ā€“ 279 models from 3 manufacturers.

Compare 279 modelsHow it works

  • 279Models
  • 11Series
  • 3Manufacturers
  • 2Industries
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Touch the points: each part of the system explains itself.

In short

Biogas, landfill and digester gas: the key facts

  • CirculationBusch describes biogas circulation: a compressor passes the biogas through the sludge in the digester; the series named are DOLPHIN, MINK, SAMOS and SECO.
  • Landfill gasElmo Rietschle names landfill gas management ā€“ collecting and compressing landfill gas ā€“ as well as mixing and compressing digester gas in the fermenter.
  • UpgradingFor upgrading by pressure swing adsorption Busch names COBRA and R5, for membrane upgrading MINK; Pfeiffer Vacuum lists both processes without describing them.
  • ManufacturersBusch, Elmo Rietschle, Leybold (CLAWVAC and NOVADRY, only listed), Edwards (liquid ring compressors for biogas and pressure filtration) and Pfeiffer Vacuum name the application.
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  • Air and gas (vacuum)
  • Exhaust

Operating principle

How it works: Biogas, landfill and digester gas

The drawing shows the basic principle in section. The systems and pumps of the individual manufacturers differ in detail.

  1. CollectingThe gas is drawn off from the digester, the fermenter or the landfill. Elmo Rietschle names collecting and compressing landfill gas.
  2. CirculatingDuring digestion the biogas is passed through the sludge in the digester by a compressor, according to Busch; Elmo Rietschle names mixing and compressing in the fermenter.
  3. UpgradingThe gas goes to upgrading: Busch names pressure swing adsorption with COBRA and R5 and membrane upgrading with MINK, Pfeiffer Vacuum lists both processes.

Vacuum and sizing

Biogas, landfill and digester gas: how much vacuum is needed

What the manufacturers say about pressure, pumping speed and sizing.

Which vacuum

The tasks are conveying, circulating and compressing ā€“ Busch speaks of a compressor, Elmo Rietschle of compressing; pressure and volume flow depend on the plant.

What the task determines

Circulation in the digester (Busch: DOLPHIN, MINK, SAMOS, SECO), pressure swing adsorption (Busch: COBRA, R5) and membrane upgrading (Busch: MINK) are different tasks with different pumps. Edwards names liquid ring compressors for biogas and pressure filtration, Leybold names CLAWVAC and NOVADRY for biogas production.

Technology

Biogas, landfill and digester gas: the vacuum pumps the manufacturers name

Listed are the series the manufacturer itself names for this application. ā€œShow only ā€¦ā€ sets the filter of the product overview.

Elmo Rietschle names the application without naming a series for it. Pfeiffer Vacuum names the application without naming a series for it.

Product overview

Biogas, landfill and digester gas: all 279 models compared

Use the filters on the left to narrow the selection ā€“ by manufacturer, technology and the modelsā€™ key figures, for 50 or 60 Hz.

Busch COBRA Industry series 36 models

COBRA NS 0070 CPumping speed 70 mĀ³/h 50 Hz85 mĀ³/h 60 HzUltimate pressure 0.03 mbarRated motor power 4 kW 50 Hz4.4 kW 60 HzVariants
COBRA NC 0100 BPumping speed 110 mĀ³/h 50 Hz130 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 3.5 kW 50 Hz4.8 kW 60 HzVariants 4
COBRA NC 0100 B ECOTORQUEPumping speed 130 mĀ³/h 50 Hz130 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 4.8 kW 50 Hz4.8 kW 60 HzVariants
COBRA NS 0160 CPumping speed 135 mĀ³/h 50 Hz170 mĀ³/h 60 HzUltimate pressure 0.03 mbarRated motor power 5.5 kW 50 Hz6.6 kW 60 HzVariants
COBRA NC 0200 BPumping speed 220 mĀ³/h 50 Hz265 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 6 kW 50 Hz7.6 kW 60 HzVariants 4
COBRA NC 0200 B ECOTORQUEPumping speed 265 mĀ³/h 50 Hz265 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 7.6 kW 50 Hz7.6 kW 60 HzVariants
COBRA NC 0300 BPumping speed 320 mĀ³/h 50 Hz385 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 7.5 kW 50 Hz9.5 kW 60 HzVariants 4
COBRA NC 0400 BPumping speed 350 mĀ³/h 50 Hz420 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 7.5 kW 50 Hz9.5 kW 60 HzVariants
COBRA NX 0450 APumping speed 350 mĀ³/h 50 Hz420 mĀ³/h 60 HzUltimate pressure 0.1 mbarRated motor power 7.5 kW 50 Hz9.5 kW 60 HzVariants
COBRA NC 0300 B ECOTORQUEPumping speed 385 mĀ³/h 50 Hz385 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 9.5 kW 50 Hz9.5 kW 60 HzVariants
COBRA NC 0400 B ECOTORQUEPumping speed 420 mĀ³/h 50 Hz420 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 9.5 kW 50 Hz9.5 kW 60 HzVariants
COBRA NX 0450 A ECOTORQUEPumping speed 420 mĀ³/h 50 Hz420 mĀ³/h 60 HzUltimate pressure 0.1 mbarRated motor power 11 kW 50 Hz11 kW 60 HzVariants
COBRA NC 0500 BPumping speed 490 mĀ³/h 50 Hz490 mĀ³/h 60 HzUltimate pressure 0.01 mbarRated motor power 9 kW 50 Hz9 kW 60 HzVariants
COBRA NC 0630 C VRPumping speed 580 mĀ³/h 50 Hz680 mĀ³/h 60 HzUltimate pressure 25 mbarRated motor power 22 kW 50 Hz22 kW 60 HzVariants
COBRA NC 0600 CPumping speed 600 mĀ³/h 50 Hz600 mĀ³/h 60 HzUltimate pressure 0.01 mbarRated motor power 18.5 kW 50 Hz18.5 kW 60 HzVariants
COBRA NS 0600 CPumping speed 600 mĀ³/h 50 Hz600 mĀ³/h 60 HzUltimate pressure 0.01 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants
COBRA NC 0630 CPumping speed 630 mĀ³/h 50 Hz630 mĀ³/h 60 HzUltimate pressure 0.01 mbarRated motor power 15 kW 50 Hz17 kW 60 HzVariants
COBRA NC 0630 C ECOTORQUEPumping speed 630 mĀ³/h 50 Hz630 mĀ³/h 60 HzUltimate pressure 0.01 mbarRated motor power 17 kW 50 Hz17 kW 60 HzVariants
COBRA DX 0650 A PLUSPumping speed 650 mĀ³/h 50 Hz650 mĀ³/h 60 HzUltimate pressure 0.1 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants
COBRA NX 0650 APumping speed 650 mĀ³/h 50 Hz650 mĀ³/h 60 HzUltimate pressure 0.1 mbarRated motor power 12.5 kW 50 Hz15 kW 60 HzVariants
COBRA NX 0650 A ECOTORQUEPumping speed 650 mĀ³/h 50 Hz650 mĀ³/h 60 HzUltimate pressure 0.1 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants
COBRA NF 0750 APumping speed 750 mĀ³/h 50 Hz750 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants
COBRA NC 1000 BPumping speed 840 mĀ³/h 50 Hz1,000 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 22 kW 50 Hz25 kW 60 HzVariants
COBRA DX 0950 A PLUSPumping speed 950 mĀ³/h 50 Hz950 mĀ³/h 60 HzUltimate pressure 0.01 mbarRated motor power 18.5 kW 50 Hz18.5 kW 60 HzVariants

Busch DOLPHIN series 70 models

Busch MINK series 32 models

Busch R5 series 58 models

Busch SAMOS series 31 models

Busch SECO series 10 models

Edwards LR1A series 12 models

Edwards LR1C series 9 models

Edwards LR1D series 12 models

Leybold CLAWVAC series 5 models

Leybold NOVADRY series 4 models

Model comparison

Models a manufacturer no longer carries in its current range are listed in its ā€œOutdated modelsā€ section.

Industries

Biogas, landfill and digester gas: where the manufacturers name it

The manufacturers list these uses on their own pages.

Environmental and wastewater

Busch names anaerobic digestion and biogas circulation in wastewater treatment, Elmo Rietschle the mixing and compressing of digester gas and landfill gas management; Leybold lists biogas production with CLAWVAC and NOVADRY, Pfeiffer Vacuum upgrading by pressure swing adsorption and membrane.

Industry page: Environmental and wastewater ā†’

Energy

For renewable energy Busch describes biogas circulation, in which a compressor passes the biogas through the sludge (DOLPHIN, MINK, SAMOS); Elmo Rietschle names mixing and compressing in the fermenter.

Industry page: Energy ā†’

Frequently asked questions

Biogas, landfill and digester gas: frequently asked questions

How is biogas circulated in the digester?

Busch describes biogas circulation as follows: a compressor passes the biogas through the sludge in the digester. For this Busch names DOLPHIN, MINK, SAMOS and SECO. Elmo Rietschle names mixing and compressing in the fermenter, without assigning a series.

Which vacuum pump or compressor is suitable for biogas?

For circulation Busch names the liquid ring vacuum pump DOLPHIN, the claw vacuum pump MINK, the side channel blower SAMOS and the dry-running rotary vane vacuum pump SECO, for pressure swing adsorption COBRA and R5, and for membrane upgrading MINK. Edwards names the liquid ring compressors LR1A, LR1C and LR1D, Leybold names CLAWVAC and NOVADRY. Elmo Rietschle names compressors, without assigning a series.

How is landfill gas collected?

Elmo Rietschle names landfill gas management, without assigning a series: the gas is collected from the landfill and compressed.

How is biogas upgraded?

The manufacturers name two processes: pressure swing adsorption, for which Busch names COBRA and R5, and membrane upgrading with MINK. Pfeiffer Vacuum lists both processes without describing them.

How much vacuum does biogas conveying need?

With biogas, the tasks are conveying, circulating and compressing ā€“ Busch speaks of a compressor, Elmo Rietschle of compressing. Pressure and volume flow depend on the plant.

Oil-free or oil-lubricated for biogas?

Busch mainly names dry or liquid-sealed pumps: COBRA (screw vacuum pump) and MINK (claw vacuum pump) run dry, SECO is a dry-running rotary vane vacuum pump, SAMOS a side channel blower, DOLPHIN a liquid ring vacuum pump; R5 is an oil-lubricated rotary vane vacuum pump. With CLAWVAC and NOVADRY Leybold names dry pumps, Edwards names liquid ring compressors.

For which biogas tasks do the manufacturers name liquid ring pumps?

Busch names the liquid ring vacuum pump DOLPHIN for circulating the biogas in the digester. Edwards names its liquid ring compressors LR1A, LR1C and LR1D for biogas and pressure filtration, without describing the process.

What is the difference between biogas, digester gas and landfill gas?

All three are produced when organic matter breaks down without air. Busch names anaerobic digestion in the digester, Elmo Rietschle the digester gas from the fermenter and the landfill gas, which is produced in the landfill and collected. For all three the manufacturers name conveying and compressing the gas.

A single pump or a central vacuum system?

A central system in a room of its own keeps noise and heat away from production and matches its output to the demand. Central vacuum systems are planned and built by Eugen Theis Vakuum, a company of the Ehrler & Beck group ā€“ more under Central Vacuum.

Does Ehrler & Beck also supply spare parts and service?

Yes. Ehrler & Beck offers original spare parts and accessories as well as maintenance and repair.

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