Complete Mix Digester
www.CompleteMixDigester.com


Complete Mix Digester

Anaerobic Digesters  *  Biogas Plants  *  Biogas Processing  Biomethane  *  Gas Dehydration  Gas Sweetening

H2S Removal  Landfill Gas to Energy  Pipeline Quality Gas  *  Sewage Sludge  *  Wastewater Treatment




info@CompleteMixDigester.com


Follow us on Twitter:





Complete Mix Digester
www.CompleteMixDigester.com


What is a complete mix digester?

A complete mix digester is one of the basic types of anaerobic digesters comprised of a sealed tank that organic waste materials, principally manure as generated at a dairy farm, is heated and mixed with microorganisms for breaking down the waste. The incoming liquid displaces an equal amount of liquid in the complete mix digester, and an equal amount exits. Biogas (methane or ch4) is generated inside of the complete mix digester which is then extracted from the top of the digester for biogas processing and upgrading into "biomethane" which can then be sold as natural gas to a natural gas pipeline, or used as a substitute fuel for natural gas. Retention times for a complete mix digester are in the 21 - 30 day range. 

Diagram of a complete mix digester.

 

Complete Mix Digesters have an enclosed, heated tank with either a:  
mechanical, hydraulic, or gas mixing system.  Complete mix digesters work 
best when there is dilution of the manure with water, i.e. milking center wastewater

More information on Anaerobic Digesters can be found at:

www.AnaerobicDigester.com

 


Complete Mix Digester

Anaerobic Digesters  *  Biogas Plants  *  Biogas Processing  Biomethane  *  Gas Dehydration  Gas Sweetening

H2S Removal  Landfill Gas to Energy  Pipeline Quality Gas  *  Sewage Sludge  *  Wastewater Treatment




info@CompleteMixDigester.com

 




 



 

 


GreatSkin.com


_______________________________________________

Running on "green fuel" such as Biomethane, B100 Biodiesel, Synthesis Gas or natural gas, our CHP Systems are the greenest "clean power generation" systems available as they generate no new greenhouse gas emissions or other hazardous air pollutants.


Clean Power Generation
Solutions

Our "Integrated" CHP Systems (Cogeneration and Trigeneration) Plants 
Have Very  High Efficiencies, Low Fuel Costs & Low Emissions

The CHP System below is Rated at 900 kW and Features:
(2) Natural Gas Engines @ 450 kW each on one Skid with Optional 
Selective Catalytic Reduction
system that removes Nitrogen Oxides to "non-detect."

The Effective Heat Rate of the CHP System below is 
4100 btu/kW with a Net System Efficiency of 92%.

    

Our CHP Systems may be the best solution for your company's economic and environmental sustainability as we "upgrade" natural gas to clean power with our clean power generation solutions.

Our Emissions Abatement solutions reduce Nitrogen Oxides to "non-detect" which means our CHP Systems can be installed and operated in most EPA non-attainment regions!

For qualified clients, we will design, build, finance, own, operate and maintain a new:

Biogas Plant - including the Anaerobic Digester and CHP System

Receive a preliminary no-obligation review of your company's organic waste stream opportunities for consideration as a candidate for our waste to fuel solution.  Send an introductory email containing the information regarding the organic waste, including the type, annual amount generated, and the process involved in producing the waste at the following email address:

info@AnaerobicDigester.com

 

What is an Anaerobic Digester?

An anaerobic digester is a system that takes an organic waste stream and through the process of anaerobic digestion (meaning without oxygen), microorganisms break-down the waste stream which generates biogas in the process.  The biogas cannot be used due to the large amount of impurities it contains, so the biogas must cleaned through a biogas to biomethane process after which, the clean biomethane, often referred to as "renewable natural gas" is used just as natural gas, methane or CH4.

The right anaerobic digester and "feedstock" are critical components to optimum production of biomethane which can fuel your own cogeneration or trigeneration power plant.


Anaerobic Digesters
: Different types for different applications


Basic Types of
Anaerobic Digesters

While there are many different types of anaerobic digesters, three designs (below) are the most common found in the U.S., which are:

1.  Anaerobic Lagoons
2.  Plug Flow Digesters
3.  Complete Mix Digesters

with more information, pictures and diagrams found below:

Anaerobic Lagoons

Diagram of a covered lagoon system.

More info at:  www.AnaerobicLagoon.com



An anaerobic lagoon (above) is sealed with a flexible, impermeable cover.  The Biomethane is recovered 
and piped to the cogeneration plant, or to a biogas to biomethane processing plant for sale to a nearby 
natural gas pipeline.  Some systems use a single cell for combined digestion and storage.

More info at:  www.AnaerobicLagoon.com

 

 

Plug Flow Digesters

Diagram of a plug flow digester.

Plug flow digesters have long, narrow concrete tanks with either a rigid or flexible 
cover. The plug flow digester (tank) is built partially or fully below grade to limit 
the demand for requiring additional heating. Plug flow digesters are used only at 
dairy operations that collect manure by scraping.

More information on Plug Flow Digesters found at: 

www.PlugFlowDigester.com

 

Anaerobic digestion is the bacterial decomposition of organic waste in the absence of oxygen. The two main products of anaerobic digestion are biogas and a solid residual material. 

Food scraps, manure, biosolids, as well as Fats, Oil, and Grease (FOG) can all be "digested" anaerobic digesters and the biomethane (cleaned-up and purified biogas) used to fuel a cogeneration power plant.


Benefits of an Anaerobic Digester:

Graphic depicting an anaerobic digester facility. Farm manure is processed in the digester, producing solids and liquids suitable as soil enhancers, and biogases used in the production of heat and power.

 

 

 

Anaerobic Digester Systems in the U.S. and Europe

Country

Biosolids

Biowaste / Solid

Agricultural

Industrial Wastewater

Industrial

Austria

100

3

100

25

Canada

50

13

Czech Republic

10

4

Denmark

64

21

5

Finland 

1

3

Germany

49

1,500

91

Greece

2

1

2

Italy

4

50

38

Netherlands

2

84

Norway

17

2

5

Portugal

94

3

Spain

1

6

27

Sweden

134

4

3

8

Switzerland

70

11

69

20

U.K.

200

1

25

26

U.S.A.

1,600

28

92

above info courtesy of www.usda.gov
and updated by: www.AnaerobicDigester.com 

 

 

  Renewable Energy Institute

"Leading the Renewable Energy Revolution"

"Changing the Way the World Makes and Uses Energy"

 

Complete Mix Digester
www.CompleteMixDigester.com

info@CompleteMixDigester.com

 

 

 

CompleteMixDigester.com

Copyright 2007
All Rights Reserved