Our team shares society’s concerns about climate change and is helping our clients with solutions to address this global challenge. As a leader of consulting, field services, and engineering problem-solvers worldwide, HGA is committed to addressing the energy transition and lowering the carbon footprint of our clients.

HGA’s innovative, sustainable renewable solutions help our clients address their landfill, biogas, biomass, flare gas management, and solar field development challenges. We are proud to have the experience and processes in place to manage and deliver industry-leading results. Our commitment to provide affordable, reliable, or sustainable energy is integrated in every project throughout our business.

01

Landfill Gas

Providing consultancy services and comprehensive engineering services for handling methane rich gases, such as from landfills and AD plants

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landfill gas
biogas
02

Biogas RNG

Bringing renewable treating solutions for biogas and anaerobic digestion projects

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03

Wood Waste Solutions

The broadest range of solutions for the wood industry, from pellet mills to electric power generation

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wood waste
solar panels
04

Solar Solutions

A wide range of solutions for the design and construction layout of solar farm projects

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05

Flare Gas Mitigation

Strategies to mitigate gas flaring and utilize technologies to converting it to useful energy fuel sources

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gas flare
carbon management
06

Carbon Management Services

Expert carbon capture technical and strategic advice

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Our innovative renewable solutions will bring streamlined processes, technology and expertise to help lower your carbon footprint.

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Biogas / Biomass

The anaerobic digestion (AD) of organic waste emits methane, commonly referred to as “Biogas” or “Biomethane.”  Having low carbon intensity scores and very small amounts of water vapor and nitrogen, Biogas is an extremely clean alternative to traditional natural gas.  These inherent properties allow Biogas to be efficiently scrubbed of impurities producing high-quality Renewable Natural Gas (RNG) which can be used as a substitute for or blended with traditional natural gas. Having worked in the pipeline sector and chemical industry since our inception, HGA understands the process to collect, clean, and transport the RNG through pipelines or as highly marketable CNG and LNG.

gas turbine

New Facilities or Updating/Converting

Whether you plan to build a greenfield processing plant or looking to optimize your existing facility HGA can advise you from concept to start up. Our EPCM approach to biogas processing provides our clients with services from consultation and design to construction, commissioning, and start-up.  With over 20 years of experience in engineering and project management, our team has successfully executed projects from $100,000 to over $150,000,000. Having designed and built some of the earliest LFG and biogas processing plants in the U.S.; our team offers more than 90 years of combined experience in renewable fuels processing.

Digester Design & Selection

For new biogas facilities sizing and selecting the proper digester is a critical step in designing the overall process. Having experience with a variety of digester styles and several agricultural and municipal waste streams, HGA understands the significant variables to consider ensuring the proper digester is selected for maximum efficiency and reliability. We work closely with industry-leading digester manufacturers to select the proper digester for your application.

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H2S and siloxane removal

HGA’s approach to H2S and siloxane removal utilizes a regeneratable liquid scavenger system that discharges elemental Sulfur and therefore produces no air emissions. With the use of a liquid scavenger, our process eliminates the need for periodic solid media replacement, potential downtime, and hazardous waste disposal that is required by dry H2S removal systems and thermal oxidizer permitting.  For siloxane removal, HGA incorporates a deep chilling technology that combines the necessary dehydration for biogas treatment with a novel approach for siloxane removal which discharges the removed siloxanes and VOCs as an aqueous discharge, eliminating the air emissions of other removal technologies.

Have you considered LNG?

The ability to further process biogas into Liquified Natural Gas (LNG) offers biogas producers that were previously unable to maximize the value of their asset a viable means to access the RNG market’s full potential. Not only is LNG a higher quality, but the higher-valued product (~ 98% pure methane) is also easily transportable by truck and rail providing new access to a multitude of potential customers and applications.  This approach is particularly applicable to projects where natural gas pipelines are either logistically inconvenient or in areas difficult to permit interconnections.

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Traditional vs. Virtual Pipeline

HGA has successfully designed and constructing pipelines for over 20 years.  If your facility has a pipeline nearby and building a short (feeder) pipeline to tie into a larger one is the most feasible option for you, we can help determine the right layout, assist in getting right-away and permits, as well as design and construction.

For trusted expertise and biogas/biomass system development, you can rely on HGA.

Landfill Gas

Once considered a liability, Landfill Gas (LFG) is now being transformed into an asset benefitting landfill owners, communities, industry, and the environment. With a composition of approximately 50% Methane, LFG is a renewable alternative to traditional natural gas. With over 30 years of experience in the pipeline and chemical industries, HGA offers municipalities, project developers, and industrial companies the EPC services they need to efficiently collect, clean, and transport the refined LFG (methane) through pipelines or as highly marketable CNG and LNG. The HGA Team has more than 90 years of experience in the development of landfill gas into merchantable products.

gas turbine

New Facilities or Updating/Converting

Whether you plan to build a greenfield processing plant or looking to optimize your existing facility HGA can advise you from concept to start up. Our EPCM approach to LFG processing provides our clients with services from consultation and design to construction, commissioning, and start-up.  With over 20 years of experience in engineering and project management, our team has successfully executed projects from $100,000 to over $150,000,000.  Having designed and built some of the earliest LFG processing plants in the U.S.; our team offers more than 90 years of combined experience in renewable fuels processing.

HGA Gas Treating process

HGA has developed a novel process designed to handle high atmospheric intrusion, without the use of a Nitrogen Rejection Unit (NRU) or the need for high inlet gas compression.  This unique approach is the preferred process for landfills with high levels of N2 due to atmospheric intrusion.  The removal of the NRU, the DEOx unit, and high-pressure compressors lowers both installation and maintenance costs while maintaining high volume capacity and ultimately producing a higher concentration of Methane.

gas treating
H2S

H2S and siloxane removal

HGA’s approach to H2S and Siloxane removal utilizes a regeneratable liquid scavenger system that discharges elemental Sulfur and therefore produces no air emissions. With the use of a liquid scavenger, our process eliminates the need for periodic solid media replacement, potential downtime, and hazardous waste disposal that is required by dry H2S removal systems and thermal oxidizer permitting.  For siloxane removal, HGA incorporates a deep chilling technology that combines the necessary dehydration for LFG treatment with a novel approach for siloxane removal which discharges the removed siloxanes and VOCs as an aqueous discharge, eliminating the air emissions of other removal technologies.

Have you considered LNG?

The ability to further process LFG into Liquified Natural Gas (LNG) offers LFG and Biogas producers that were previously unable to maximize the value of their asset a viable means to access the RNG market’s full potential. Not only is LNG a higher quality, but the higher-valued product (~ 98% pure methane) it is also easily transportable by truck and rail providing new access to a multitude of potential customers and applications.  This approach is particularly applicable to projects where natural gas pipelines are either logistically inconvenient or in areas difficult to permit interconnections.

gas piping
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Traditional vs. Virtual Pipeline

HGA has been involved in the design and construction of pipelines and powerlines for over 20 years, with approximately 5,000 miles of route evaluated and designed by HGA.  If your facility has a pipeline nearby and building a short (feeder) pipeline to tie into a larger one is the most feasible option for you, we can help determine the right layout, assist in getting right-away and permits, as well as design and construction.

For trusted expertise and landfill gas system development, you can rely on HGA.

Biomass Power

As the US-EPA moves to increase the controls on methane and CO2 emissions, an early target will be the reduction of oilfield flared gas.  As these flares are inefficient, the emission of both elements is high.  HGA has designed a compact flare liquefaction unit that will eliminate the flare while providing an integrated system to produce field electricity and transportable natural gas liquids.  As these units are modular, they may also be relocated to new flare sites as interconnecting pipelines are extended to the original locations.

Biomass Power

With increasing pressure to reduce carbon emissions and the critical needs of companies to meet their ambitious mid-century net-zero commitments, HGA has created its multi-disciplinary Carbon Management Services team uniquely positioned to provide comprehensive services for carbon reduction strategies, option evaluation, project planning, and implementation. From carbon capture, utilization, and storage (CCUS) assessment and comprehensive development planning to execution of renewable projects, HGA carbon management experts combine expertise and the latest modeling tools and approaches to solve energy transition issues across the full spectrum of energy sources and uses.

Regardless of your CO2 project’s scale, the HGA team of experts can assist you with costs, evaluation of emissions reductions, and implementation of carbon reduction technology to help you meet your specific business and CO2 reduction goals.

Trusted advisory services in carbon reduction implementation

Research and feasibility assessments

  • Evaluation and implementation of carbon policies and regulations
  • Federal and state carbon capture, utilization and storage (CCUS) policy, law, and regulation
  • Tax incentives (45Q)
  • Emissions credit certification, valuation, verification, and market assessment

Carbon technology assessment solutions

  • Anthropogenic CO2 capture/production and acquisition
  • CO2 pipelines
  • Renewable energy and electrolysis
  • CO2/EOR—operations and CO2 storage
  • Dedicated CO2 storage development and operation
  • Oil and gas upstream, midstream, and downstream technology systems integration

Effectively communicate your carbon reduction program

  • Industry expertise to effectively communicate your company’s initiatives
  • Help refine your message to build awareness and recognition

Project development and implementation

  • Owner’s engineer, engineering production and evaluation, and technology integration
  • CO2 capture engineering
  • CO2/EOR and residual oil zone (ROZ) specialist: reservoir and resource assessment, and project design
  • Class VI well permitting for large scale CO2 injection and long-term geological sequestration
  • Renewable energy
  • Project finance

The HGA team’s portfolio of Carbon Management Services offers a unique combination of expert analysis to enable our clients to make better-informed business decisions while meeting the demand for affordable energy while reducing CO2 emissions. With years of experience, we provide carbon capture and storage and carbon sequestration solutions that will help you make informed decisions on the costs, developments, and investment opportunities of implementing CO2 reduction technology.

If you need assistance in achieving your emission reduction commitments in an enduring and sustainable way with transparency, accountability, and credibility, contact HGA Carbon Management Services.

With a long history in the timber industry, HGA understands the challenges you face and provides a comprehensive range of technical and advisory solutions you need to help turn timber residue into a useful renewable energy source.

Whether it be wood residue from timber processing used to generate heat or electricity or create pellets for biofuel, HGA can help you with your wood recycling and waste initiative. Let us help you develop a solution to reduce your environmental impact, save costs, and keep up with evolving customer demand.

Biomass Power Plant Solutions

We provide process improvements to transform wood waste into a profitable energy source.

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Pellet Mills

We’ve helped clients develop pellet mill manufacturing solutions to convert wood fiber into compressed pellets.

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Biomass Power

HGA provides our solar power clients with a comprehensive range of technical and advisory services, including project assessment, site planning analysis, and design, engineering, and construction management.

HGA has a broad range of solutions to help clients develop solar projects:

Planning Analysis

  • Front End (FEL) execution/support
  • Preliminary site/array layout
  • Environmental assessments
  • Environmental and regulatory approvals
  • Regulatory compliance
  • Economic development strategies
  • Community impact assessment

Site Selection and Evaluation

  • Site prospecting and GIS services
  • Routing studies and surveys – RouteNAV™
  • Unmanned Aircraft Vehicle (UAV) services
  • Aerial photogrammetry and mapping
    • Aerial terrain mapping
    • Substation site surveys
    • Powerline route surveys
    • Vegetation identification and analysis
    • Power line corridors
  • Topographic surveys
  • As-builts
  • Boundary surveys
  • Construction layout
  • Real estate development
  • ALTA/ACSM land title surveys

Engineering Services and Design

  • Conceptual and detailed design
  • Site planning and civil engineering
  • Civil roadway and drainage design
  • Electrical systems

Construction Management

  • Construction management/oversight
  • Site Work – roads, drainage, utilities, etc.
  • Construction staking services
  • Cost controls – VistaTRAK®