• Scalable

    Anaerobic Digesters

    From smaller operations
    to the world's largest industrial
    & agricultural facilities.

  • Scalable

    Reducing Climate Emissions

    Complete digestion means fewer GHG emissions from farming. RNG project economics also favor the digester that reliably produces the MOST biogas "per cow." Notably, DVO processes manure from over 400,000 milking.

  • Scalable

    High Performance

    Dairy example: Nearly 3 TIMES
    the biogas output "per cow"
    than covered lagoon digesters.
    See AD type comparisons, HERE.

  • Commercial-Industrial

    Industrial Wastes

    Including food & food production wastes / Urban organics from MSW / High-strength and mixed-wastes processing...

  • Poultry

    Hog, Poultry
    & Dairy Farms

    Maximize nutrient management, odor and pathogen destruction (including e-coli and salmonella), & total GHG reductions.

  • Phosphorus & Nitrogen Recovery

    Phosphorus & Nitrogen Recovery

    Economically remove & reuse up to 90% of N and P from organic wastes.

  • BioCNG

    Biogas to RNG

    Offset emissions when
    used as a transportation fuel.

Learn More

North America’s largest biogas company puts renewables to work. For example: Our patented "Two-Stage Linear VortexTM" digesters process more farm and industrial wastes globally than any other company, or design.

Largely due to unparalleled performance: DVO's anaerobic digester (AD) systems greatly reduce odors, are cost-effective, scalable, operate automatically and require low maintenance. For given feedstock(s), no other digester design comes close to its biogas/renewable energy output and greenhouse gas (GHG) emissions reductions. DVO's is also the ONLY digester that enjoys "Recognized" status by the independent agency Newtrient, LLC.
. . . Crucially, most are still operating today (including the first in 2001). DVO is the U.S. market leader (also operating on all continents save Antarctica) for AD and environmental engineering, providing reliable, proven solutions and services to industry and agriculture for over 30 years.

Learn More

Digester Products – View More »

  • Biogas to Electricity

    Methane is collected from the two stages of the AD vessel and utilized for fuel in combined heat and power (CHP) gensets. Typically power is sold at a higher rate than purchased, and much more is produced than consumed.

  • Biosolids

    DVO digesters provide a superior animal bedding material, high "P" transportable/saleable fertilizers, soil aeration and peat-moss amendments.

  • Liquid Nutrients

    The digestion process not only preserves the nutrient value in the manure, it also removes the odor, kills most pathogens (including E-Coli) and changes the state of the nutrients so they can be applied to a growing crop.

  • Phosphorus Recovery

    Up to 90% of phosphorus can be economically captured, in a form that is economical to transport to the land that needs it (and away from sensitive watersheds).

  • Nitrogen Recovery

    DVO's Nitrogen Recovery process captures the nitrogen ammonia that is otherwise lost, and places it in the form of a stable commercial fertilizer – creating another revenue source (or operating cost offset) for the digester.

  • Heat Energy

    30-60% of the heat generated is used by the AD system. The remaining energy can be used as a replacement for hot water production (reducing natural gas or propane consumption), biosolids drying, in-floor heating of facilities, etc.

  • Biofuels – bioCNG

    Biogas can now be economically cleaned, purified and pressurized to fuel semi-trucks, construction equipment, commercial fleets, farm vehicles etc.

  • Water Recycle/Re-Use

    Water is increasingly a scarce and valuable resource. Options are available to not only sequester nutrients, but return process water to a reusable condition.

Selected Projects – View More Installations »

    Biotown Ag, IN

    Food waste/"Mixed" digester,
    now 6.3MW

  • Clover Hill Dairy, WI

    2,000 milking, 480kW

  • Poultry Digester, OH

    Litter only, from 1.2M layer farm
    No irrigation, 100% water recycle

  • Ancali, Chile

    10,000 milking, 2.5MW

    Jerome, ID - Andgar Corp.
    Largest in North America

    11M gal/42k M3 cap, 4.5MW

  • Maxwell Farms, VT

    750 milking, 225kW

    Fair Oaks Dairies, IN

    14,000 milking, CNG + 1MW

  • Holsum Dairy, WI

    4,000 milking, 1MW

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Testimonials – View More Testimonials »

  • Why DVO? It’s simple. Their system digests ALL the waste from a dairy. Nothing bypasses. The manure is thoroughly and efficiently processed, and the gas output is steady and predictable year-round. Together this means significantly more biogas ‘per cow’ is produced than with other digester designs. DVO also has an excellent track record of success. These things are good for the environment and the local community...and tend to make our investors happy too.”

    “It also helps that dairy farmers already know DVO, and they like the other benefits the DVO system offers them.”

    Grant Zimmerman
    CEO, Amp Americas – owner of North
    America's 2 largest biogas-to-CNG sites

  • The digester is one of the few things we have ever purchased that has exceeded our expectations."

    Ron St. John
    Alliance Dairies, FL

  • When a business such as ours makes an investment of this size the concensus from our family was to go with the proven technology. For us that meant DVO."

    Matt Maxwell
    Maxwell Farms, VT

  • DVO took care of all details from writing grants to helping with design and installing the last manure pump. They have my philosophy of keeping things as simple as possible on the farm. However the most important part of their company are the people. Simply a great group to work with."

    Dave Meissner
    Norm-E-Lane, WI